10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Quarterly Period Ended March 31, 2019

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number 001-35397

RENEWABLE ENERGY GROUP, INC.

(Exact name of registrant as specified in its charter)

Delaware	26-4785427
(State of other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
416 South Bell Avenue, Ames, Iowa	50010
(Address of principal executive offices)	(Zip code)

(515) 239-8000

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    YES  x    NO  ¨

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    YES  x    NO  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	¨	Accelerated filer	x
Non-accelerated filer	¨	Smaller reporting company	¨
		Emerging growth company	¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES  ¨    NO   x

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.0001 per share	REGI	NASDAQ Global Market

As of April 30, 2019, the registrant had 37,618,998 shares of Common Stock outstanding.

TABLE OF CONTENTS

		Page
PART I	FINANCIAL INFORMATION	1
ITEM 1.	Condensed Consolidated Financial Information	1
ITEM 2.	Management's Discussion and Analysis of Financial Information	23
ITEM 3.	Quantitative and Qualitative Disclosures about Market Risk	37
ITEM 4.	Controls and Procedures	38
PART II	OTHER INFORMATION	39
ITEM 1.	Legal Proceedings	39
ITEM 1A.	Risk Factors	39
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds	53
ITEM 3.	Defaults Upon Senior Securities	53
ITEM 4.	Mine Safety Disclosures	53
ITEM 5.	Other Information	53
ITEM 6.	Exhibits	53

3

PART I. FINANCIAL INFORMATION

ITEM 1. CONDENSED CONSOLIDATED FINANCIAL INFORMATION

RENEWABLE ENERGY GROUP, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited)

(in thousands, except share and per share amounts)

	March 31, 2019			December 31, 2018
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	123,062		$	123,575
Marketable securities	17,482			50,932
Accounts receivable (net of allowance for doubtful accounts of $460 and $673, respectively)	104,989			74,551
Inventories	220,566			168,900
Prepaid expenses and other assets	33,401			41,169
Restricted cash	3,000			3,000
Current assets held for sale	3,250			3,250
Total current assets	505,750			465,377
Property, plant and equipment, net	588,471			590,723
Right of use assets	42,109			—
Goodwill	16,080			16,080
Intangible assets, net	13,312			13,646
Other assets	20,677			21,270
TOTAL ASSETS	$	1,186,399		$	1,107,096
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Lines of credit	$	102,612		$	14,250
Current maturities of long-term debt	150,339			149,006
Current maturities of operating lease obligations	17,606			—
Accounts payable	86,893			95,866
Accrued expenses and other liabilities	26,440			35,256
Deferred revenue	13,315			300
Total current liabilities	397,205			294,678
Unfavorable lease obligation	—			2,259
Deferred income taxes	7,973			8,410
Long-term debt (net of debt issuance costs of $3,217 and $3,390, respectively)	31,505			33,421
Long-term operating lease obligations	34,883			—
Other liabilities	1,592			3,075
Total liabilities	473,158			341,843
COMMITMENTS AND CONTINGENCIES
EQUITY:
Common stock ($.0001 par value; 300,000,000 shares authorized; 37,618,131 and 37,318,942 shares outstanding, respectively)	5			5
Common stock—additional paid-in-capital	452,646			451,427
Retained earnings	377,324			427,244
Accumulated other comprehensive income	(2,018		)	(1,656		)
Treasury stock (11,673,962 and 11,524,975 shares outstanding, respectively)	(114,716		)	(111,767		)
Total equity	713,241			765,253
TOTAL LIABILITIES AND EQUITY	$	1,186,399		$	1,107,096

See notes to condensed consolidated financial statements.

1

RENEWABLE ENERGY GROUP, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(unaudited)

(in thousands, except share and per share amounts)

	Three months ended
	March 31, 2019			March 31, 2018
REVENUES:
Biomass-based diesel sales	$	455,206		$	274,761
Separated RIN sales	22,463			47,179
Biomass-based diesel government incentives	468			365,285
	478,137			687,225
Other revenue	72			777
	478,209			688,002
COSTS OF GOODS SOLD:
Biomass-based diesel	484,413			405,810
Separated RINs	6,585			32,737
Other costs of goods sold	3			—
	491,001			438,547
GROSS PROFIT (LOSS)	(12,792		)	249,455
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	25,145			31,654
RESEARCH AND DEVELOPMENT EXPENSE	209			1,034
INCOME (LOSS) FROM OPERATIONS	(38,146		)	216,767
OTHER INCOME (EXPENSE), NET:
Change in fair value of contingent consideration	(304		)	(458		)
Loss on debt extinguishment	(2		)	(232		)
Gain on involuntary conversion	—			4,000
Other income, net	854			1,215
Interest expense	(4,219		)	(4,651		)
	(3,671		)	(126		)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(41,817		)	216,641
INCOME TAX BENEFIT	430			1,203
NET INCOME (LOSS) FROM CONTINUING OPERATIONS	(41,387		)	217,844
DISCONTINUED OPERATIONS (NOTE 5):
Loss on operations of discontinued operations	(2,017		)	(3,455		)
NET LOSS ON DISCONTINUED OPERATIONS	(2,017		)	(3,455		)
NET INCOME (LOSS) TO THE COMPANY	$	(43,404	)	$	214,389
LESS—EFFECT OF PARTICIPATING SHARE-BASED AWARDS ON CONTINUING OPERATIONS	—			5,236
NET INCOME (LOSS) FROM CONTINUING OPERATIONS ATTRIBUTABLE TO THE COMPANY’S COMMON STOCKHOLDERS	$	(41,387	)	$	212,608
NET LOSS FROM DISCONTINUED OPERATIONS ATTRIBUTABLE TO THE COMPANY’S COMMON STOCKHOLDERS	$	(2,017	)	$	(3,455	)
Basic net income (loss) per share attributable to common stockholders:
Continuing operations	$	(1.11	)	$	5.48
Discontinued operations	$	(0.05	)	$	(0.09	)
Net income (loss) per share	$	(1.16	)	$	5.39
Diluted net income (loss) per share attributable to common stockholders:
Continuing operations	$	(1.11	)	$	5.38
Discontinued operations	$	(0.05	)	$	(0.09	)
Net income (loss) per share	$	(1.16	)	$	5.30
Weighted-average shares used to compute basic net loss per share attributable to common stockholders:
Basic	37,353,352			38,819,443
Weighted-average shares used to compute diluted net loss per share attributable to common stockholders:
Continuing operations	37,353,352			39,484,087
Discontinued operations	37,353,352			38,819,443
Net income (loss)	37,353,352			39,484,087

See notes to condensed consolidated financial statements.

2

RENEWABLE ENERGY GROUP, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(unaudited)

(in thousands)

	Three months ended
	March 31, 2019			March 31, 2018
Net income (loss)	$	(43,404	)	$	214,389
Unrealized gains (losses) on marketable securities, net of taxes of $0 and $0, respectively	(1		)	—
Foreign currency translation adjustments	(361		)	719
Other comprehensive income (loss)	(362		)	719
Comprehensive income (loss) attributable to the Company	$	(43,766	)	$	215,108

See notes to condensed consolidated financial statements.

3

RENEWABLE ENERGY GROUP, INC.

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY

(unaudited)

(in thousands, except share amounts)

	Company Stockholders’ Equity
	Common Stock Shares		Common Stock		Common Stock - Additional Paid-in Capital			Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Treasury Stock			Total
BALANCE, January 1, 2018	38,837,749		$	5	$	515,452		$	134,928		$	278		$	(83,081	)	$	567,582
Conversion of restricted stock units to common stock (net of 51,995 shares of treasury stock purchased)	127,470		—		—			—			—			(621		)	(621		)
Settlement of stock appreciation rights in common stock (net of 14,558 shares of treasury stock purchased)	33,463		—		—			—			—			(172		)	(172		)
Partial termination of capped call options	(15,012	)	—		252			—			—			(167		)	85
Convertible debt extinguishment impact (net of tax impact of $68)	—		—		(440		)	—			—			—			(440		)
Treasury stock purchases	(641,601	)	—		—			—			—			(7,828		)	(7,828		)
Stock compensation expense	—		—		1,794			—			—			—			1,794
Other comprehensive income	—		—		—			—			719			—			719
Net income	—		—		—			214,389			—			—			214,389
BALANCE, March 31, 2018	38,342,069		$	5	$	517,058		$	349,317		$	997		$	(91,869	)	$	775,508
BALANCE, January 1, 2019	37,318,942		$	5	$	451,427		$	427,244		$	(1,656	)	$	(111,767	)	$	765,253
Conversion of restricted stock units to common stock (net of 138,012 shares of treasury stock purchased)	283,339		—		—			—			—			(2,760		)	(2,760		)
Settlement of stock appreciation rights in common stock (net of 9,888 shares of treasury stock purchased)	16,937		—		(12		)	—			—			(159		)	(171		)
Partial termination of capped call options	(1,087	)	—		30			—			—			(30		)	—
Convertible debt extinguishment impact	—		—		(152		)	—			—			—			(152		)
Stock compensation expense	—		—		1,353			—			—			—			1,353
Other comprehensive loss	—		—		—			—			(362		)	—			(362		)
Adoption of ASC Topic 842, Leases	—		—		—			(6,516		)	—			—			(6,516		)
Net loss	—		—		—			(43,404		)	—			—			(43,404		)
BALANCE, March 31, 2019	37,618,131		$	5	$	452,646		$	377,324		$	(2,018	)	$	(114,716	)	$	713,241

See notes to condensed consolidated financial statements.

4

RENEWABLE ENERGY GROUP, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited)

(in thousands)

	Three months ended
	March 31, 2019			March 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$	(43,404	)	$	214,389
Net loss from discontinuing operations	(2,017		)	(3,455		)
Net income (loss) from continuing operations	(41,387		)	217,844
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation expense	9,099			8,739
Amortization expense of assets and liabilities, net	4,441			368
Gain on involuntary conversion	—			(4,000		)
Accretion of convertible note discount	1,095			1,357
Amortization of marketable securities	(129		)	—
Change in fair value of contingent consideration	304			458
Gain on sale of assets	—			(990		)
Loss on debt extinguishment	2			232
Provision (benefit) for doubtful accounts	(300		)	314
Stock compensation expense	1,353			1,794
Deferred tax expense	(432		)	(1,487		)
Other operating activities	77			10
Changes in assets and liabilities:
Accounts receivable, net	(30,516		)	(375,715		)
Inventories	(52,009		)	(35,891		)
Prepaid expenses and other assets	9,342			26,582
Accounts payable	(8,618		)	152,833
Accrued expenses and other liabilities	(5,352		)	(16,046		)
Operating lease obligations	(3,141		)	—
Deferred revenue	13,016			(479		)
Net cash flows used in operating activities - continuing operations	(103,155		)	(24,077		)
Net cash flows used in operating activities - discontinuing operations	(2,770		)	(4,571		)
Cash used in operating activities	(105,925		)	(28,648		)
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash paid for marketable securities	(3,478		)	—
Cash received from maturities of marketable securities	37,084			—
Cash receipts for involuntary conversion	—			4,000
Cash paid for purchase of property, plant and equipment	(8,235		)	(16,487		)
Cash receipts for sale of assets	—			1,630
Cash paid for investments	(57		)	—
Net cash flows provided by (used in) investing activities - continuing operations	25,314			(10,857		)
Net cash flows used in investing activities - discontinuing operations	—			(336		)
Cash provided by (used in) investing activities	25,314			(11,193		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings on revolving line of credit	84,754			40,514
Borrowings on other lines of credit	15,649			12,358
Repayments on other lines of credit	(11,908		)	(12,992		)
Cash received from notes payable	—			10,890
Cash paid on notes payable	(2,004		)	(8,018		)
Cash paid for debt issuance costs	(45		)	(78		)
Cash paid for treasury stock	—			(7,828		)
Cash paid for contingent consideration settlement	(3,316		)	(2,813		)
Cash received on partial termination of capped call options	—			85
Cash paid for conversion of restricted stock units and stock appreciation rights	(2,931		)	(793		)
Net cash flows provided by financing activities - continuing operations	80,199			31,325
Net cash flows used in financing activities - discontinuing operations	—			—
Cash provided by financing activities	80,199			31,325
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(412		)	(8,516		)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, Beginning of period	126,575			77,627
Effect of exchange rate changes on cash	(101		)	179
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, End of period	$	126,062		$	69,290

(continued)

5

RENEWABLE ENERGY GROUP, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited)

(in thousands)

	Three months ended
	March 31, 2019		March 31, 2018
SUPPLEMENTAL DISCLOSURES OF CASH FLOWS INFORMATION:
Cash paid for income taxes	$	204	$	—
Cash paid for interest	$	849	$	1,154
Leased assets obtained in exchange for new operating lease liabilities	$	1,562	$	—
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Amounts included in period-end accounts payable for:
Purchases of property, plant and equipment	$	2,165	$	7,123
Debt issuance cost	$	—	$	52

(concluded)

See notes to condensed consolidated financial statements.

6

RENEWABLE ENERGY GROUP, INC.

NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

For The three Months Ended March 31, 2019 and 2018

(unaudited)

(in thousands, except share and per share amounts)

NOTE 1 — BASIS OF PRESENTATION AND NATURE OF THE BUSINESS

The condensed consolidated financial statements have been prepared by Renewable Energy Group, Inc. and its subsidiaries (the "Company" or "REG"), pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been condensed or omitted as permitted by such rules and regulations. All adjustments, consisting of normal recurring adjustments, have been included. Management believes that the disclosures are adequate to present fairly the financial position, results of operations and cash flows at the dates and for the periods presented. It is suggested that these interim financial statements be read in conjunction with the consolidated financial statements and the notes thereto appearing in the Company’s latest annual report on Form 10-K filed on March 7, 2019. Results for interim periods are not necessarily indicative of those to be expected for the fiscal year.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts and related disclosures. Actual results could differ from those estimates.

As of March 31, 2019, the Company owns and operates a network of fourteen biorefineries, with twelve locations in North America and two locations in Europe, which includes thirteen operating biomass-based diesel production facilities with aggregate nameplate production capacity of 520 million gallons per year ("mmgy") and one fermentation facility. Ten of these plants are “multi-feedstock capable” which allows them to use a broad range of lower-cost feedstocks, such as inedible corn oil, used cooking oil and inedible animal fats in addition to vegetable oils, such as soybean oil and canola oil.

The biomass-based diesel industry and the Company’s business have benefited from certain federal and state incentives. The federal biodiesel mixture excise tax credit (the "BTC") was retroactively reinstated on February 9, 2018, for the fiscal year 2017, but has not been reinstated for 2018 or 2019 as of the date of this report. The expiration or modification of any one or more of those incentives, could adversely affect the financial results of the Company.

NOTE 2 — SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The following accounting policies should be read in conjunction with a summary of the significant accounting policies the Company has disclosed in its Annual Report on Form 10-K for the year ended December 31, 2018.

Restricted Cash

The Company segregates certain cash balances as restricted cash that represent those funds required to be set aside by a contractual agreement. The Company classifies restricted cash between current and non-current assets based on the length of time of the restricted use.

As of March 31, 2019 and 2018, current restricted cash amounted to $3,000 and $0, respectively, which was held as pledges for letters of credit issued to support our operations. See the table below for reconciliation of "Cash, Cash Equivalents and Restricted Cash" in regards to the Condensed Consolidated Statements of Cash Flows:

	March 31, 2019		March 31, 2018
Cash and cash equivalents	$	123,062	$	69,290
Restricted cash	3,000		—
Total cash, cash equivalents and restricted cash in the Condensed Statements of Cash Flows	$	126,062	$	69,290

Marketable Securities

The Company’s marketable securities are classified as available-for-sale and are reported at fair value, with unrealized gains and losses, net of tax, recorded in accumulated other comprehensive income (loss). Realized gains or losses and declines in value judged to be other-than-temporary, if any, on available-for-sale securities are reported in other income, net. The Company evaluates such investments periodically for possible other-than-temporary impairment. A decline of fair value below amortized costs of debt securities is considered an other-than-temporary impairment if the Company has the intent to sell the

7

security or if it is more likely than not that the Company will be required to sell the security before recovery of the entire amortized cost basis. In those instances, an impairment charge equal to the difference between the fair value and the amortized

cost basis is recognized in earnings. Regardless of the Company’s intent or requirement to sell a debt security, an impairment is considered other-than-temporary if the Company does not expect to recover the entire amortized cost basis; in those instances, a credit loss equal to the difference between the present value of the cash flows expected to be collected based on credit risk and the amortized cost basis of the debt security is recognized in earnings. The Company has no current requirement or intent to sell a material portion of marketable securities as of March 31, 2019. The Company expects to recover up to (or beyond) the initial cost of investment for securities held. In computing realized gains and losses on available-for-sale securities, the Company determines cost based on amounts paid, including direct costs such as commissions to acquire the security, using the specific identification method.

Renewable Identification Numbers ("RINs")

When the Company produces and sells a gallon of biomass-based diesel, 1.5 to 1.7 RINs per gallon are generated. RINs are used to track compliance with the Renewable Fuel Standard ("RFS2"). RFS2 allows the Company to attach between zero and 2.5 RINs to any gallon of biomass-based diesel. As a result, a portion of the selling price for a gallon of biomass-based diesel is generally attributable to RFS2 compliance. However, RINs that the Company generates are a form of government incentive and not a result of the physical attributes of the biomass-based diesel production. Therefore, no cost is allocated to the RIN when it is generated, regardless of whether the RIN is transferred with the biomass-based diesel produced or held by the Company pending attachment to other biomass-based diesel production sales.

In addition, the Company also obtains RINs from third parties who have separated the RINs from gallons of biomass-based diesel. From time to time, the Company holds varying amounts of these separated RINs for resale. RINs obtained from third parties are initially recorded at their cost and are subsequently revalued at the lower of cost or net realizable value as of the last day of each accounting period. The resulting adjustments are reflected in costs of goods sold for the period. The value of these RINs is reflected in “Prepaid expenses and other assets” on the Condensed Consolidated Balance Sheets. The cost of goods sold related to the sale of these RINs is determined using the average cost method, while market prices are determined by RIN values, as reported by the Oil Price Information Service ("OPIS").

Low Carbon Fuel Standard

The Company generates Low Carbon Fuel Standard ("LCFS") credits for its low carbon fuels or blendstocks when its qualified low carbon fuels are transported into an LCFS market. LCFS credits are used to track compliance with the LCFS. As a result, a portion of the selling price for a gallon of biomass-based diesel sold into an LCFS market is also attributable to LCFS compliance. However, LCFS credits that the Company generates are a form of government incentive and not a result of the physical attributes of the biomass-based diesel production. Therefore, no cost is allocated to the LCFS credit when it is generated, regardless of whether the LCFS credit is transferred with the biomass-based diesel produced or held by the Company.

In addition, the Company also obtains LCFS credits from third-party trading activities. From time to time, the Company holds varying amounts of these third-party LCFS credits for resale. LCFS credits obtained from third parties are initially recorded at their cost and are subsequently revalued at the lower of cost or net realizable value as of the last day of each accounting period, and the resulting adjustments are reflected in costs of goods sold for the period. The value of LCFS credits obtained from third parties is reflected in “Prepaid expenses and other assets” on the Condensed Consolidated Balance Sheet. The cost of goods sold related to the sale of these LCFS credits is determined using the average cost method, while market prices are determined by LCFS values, as reported by the OPIS. At March 31, 2019 and December 31, 2018, the Company held no LCFS credits purchased from third parties.

The Company records assets acquired and liabilities assumed through the exchange of non-monetary assets based on the fair value of the assets and liabilities acquired or the fair value of the consideration exchanged, whichever is more readily determinable.

Convertible Debt

In June 2016, the Company issued $152,000 aggregate principal amount of 4% convertible senior notes due in 2036 (the "2036 Convertible Senior Notes"). See "Note 8 - Debt" for a further description of the 2036 Convertible Senior Notes. During the three months ended March 31, 2019 and 2018, the Company made no repurchases of the 2036 Convertible Senior Notes.

In June 2014, the Company issued $143,800 aggregate principal amount of 2.75% convertible senior notes due in 2019 (the "2019 Convertible Senior Notes"). During the three months ended March 31, 2018, the Company used $6,689 under the 2017 Program (defined below in "Security Repurchase Programs") to repurchase $6,311 principal amount of the 2019 Convertible Senior Notes. During the three months ended March 31, 2019, the Company made no repurchases of the 2019 Convertible Senior Notes. See "Security Repurchase Programs" below.

8

Capped Call Transaction

In connection with the issuance of the 2019 Convertible Senior Notes, the Company entered into capped call transactions. The purchased capped call transactions were recorded as a reduction to common stock-additional paid-in-capital. Because this was considered to be an equity transaction and qualifies for the derivative scope exception, no future changes in the fair value of the capped call will be recorded by the Company. During 2016, in connection with the issuance of the 2036 Convertible Senior Notes, certain call options covered by the original capped call transaction were rebalanced and reset to cover 100% of the total number of shares of the Company's Common Stock underlying the remaining principal of the 2019 Convertible Senior Notes. The impact of these transactions, net of tax, was reflected as an addition/reduction to Additional Paid-in Capital as presented in the Condensed Consolidated Statements of Stockholders' Equity.

Security Repurchase Programs

In December 2017, June 2018 and January 2019, the Company's Board of Directors approved a repurchase program, each of up to $75,000 of the Company's convertible notes and/or shares of common stock (the "2017 Program","2018 Program", and "2019 Program", respectively). Under these programs, the Company may repurchase convertible notes or shares from time to time in open market transactions, privately negotiated transactions or by other means. The timing and amount of repurchase transactions under each program are determined by the Company's management based on its evaluation of market conditions, share price, bond price, legal requirements and other factors. During the three months ended March 31, 2018, the Company repurchased 641,601 shares of Common Stock for $7,828 under the 2017 Program. In that same period, the Company used approximately $6,689 under the 2017 Program to repurchase $6,311 principal amount of the 2019 Convertible Senior Notes. There were no share or note repurchases made under the 2017, 2018 or 2019 Programs during the quarter ended March 31, 2019.

Revenue Recognition

The Company generally has a single performance obligation in its arrangements with customers. The Company believes for most of its contracts with customers, control is transferred at a point in time, typically upon delivery to the customers. When the Company performs shipping and handling activities after the transfer of control to the customers (e.g., when control transfers prior to delivery), they are considered as fulfillment activities, and accordingly, the costs are accrued for when the related revenue is recognized. Taxes collected from customers relating to product sales and remitted to governmental authorities are excluded from revenues. The Company generally expenses sales commissions when incurred because the amortization period would have been less than one year. The Company records these costs within selling, general and administrative expenses.

The following is a description of principal activities from which we generate revenue. Revenues from contracts with customers are recognized when control of the promised goods or services are transferred to our customers, in an amount that reflects the consideration that we expect to receive in exchange for those goods or services.

• sales of biodiesel and renewable diesel produced at our facilities and acquired from third parties, including RINs and LCFS credits;

• resale of petroleum acquired from third parties, along with the sale of petroleum-based products further blended with biodiesel produced at our wholly owned facilities;

• sales of raw materials, glycerin, and other co-products of the biomass-based diesel production process;

• other revenue, including biomass-based diesel facility management and operational services; and

• incentive payments from federal and state governments, including the BTC, and from the USDA Advanced Biofuel Program.

Disaggregation of revenue:

All revenue recognized in the income statement, except for Biomass-based diesel Government Incentives, is considered to be revenue from contracts with customers. The following table depicts the disaggregation of revenue according to product line and segment:

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	Reportable Segments
Three months ended March 31, 2019	Biomass-based Diesel		Services		Corporate and other		Intersegment Revenues			Consolidated Total
Biomass-based diesel sales, net of BTC related amount due to customers of $0	$	399,632	$	—	$	—	$	(85,520	)	$	314,112
Petroleum diesel sales	—		—		83,903		—			83,903
Other biomass-based diesel revenue	57,191		—		—		—			57,191
Separated RIN sales	22,463		—		—		—			22,463
Other revenues	—		19,583		—		(19,511		)	72
Total revenues from contracts with customers	$	479,286	$	19,583	$	83,903	$	(105,031	)	$	477,741
Biomass-based diesel government incentives	468		—		—		—			468
Total revenues	$	479,754	$	19,583	$	83,903	$	(105,031	)	$	478,209
Three months ended March 31, 2018	Biomass-based Diesel		Services		Corporate and other		Intersegment Revenues			Consolidated Total
Biomass-based diesel sales, net of BTC related amount due to customers of $144,944	$	166,191	$	—	$	3,579	$	(17,683	)	$	152,087
Petroleum diesel sales	—		—		70,964		—			70,964
Other biomass-based diesel revenue	51,710		—		—		—			51,710
Separated RIN sales	47,179		—		—		—			47,179
Other revenues	—		35,215		—		(34,438		)	777
Total revenues from contracts with customers	$	265,080	$	35,215	$	74,543	$	(52,121	)	$	322,717
Biomass-based diesel government incentives	365,285		—		—		—			365,285
Total revenues	$	630,365	$	35,215	$	74,543	$	(52,121	)	$	688,002

Contract balances:

The following table provides information about receivables and contract liabilities from contracts with customers:

	March 31, 2019			December 31, 2018
Accounts receivable	$	104,989		$	74,551
Short-term contract liabilities (deferred revenue)	$	(13,315	)	$	(300	)

The Company receives payments from customers based upon contractual billing schedules; accounts receivable are recorded when the right to consideration becomes unconditional. Contract liabilities include payments received in advance of performance under the contract, and are realized with the associated revenue recognized under the contract. Significant changes to the contract liabilities during the three months ended March 31, 2019 and 2018 are as follows:

	January 1, 2019		Cash receipts (Payments)		Less: Impact on Revenue			Other		March 31, 2019
Deferred revenue	$	300	$	28,658	$	15,643		$	—	$	13,315
	January 1, 2018		Cash receipts (Payments)		Less: Impact on Revenue			Other		March 31, 2018
Deferred revenue	$	2,218	$	10,507	$	10,985		$	—	$	1,740
Payables to customers related to BTC	—		—		(144,944		)	5,832		150,776
	$	2,218	$	10,507	$	(133,959	)	$	5,832	$	152,516

Discontinued Operations

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Loss from discontinued operations mainly relates to the research and development activities of REG Life Sciences, the Company's industrial biotechnology business, which has been classified as assets held for sale following our decision to pursue a sale of this business in the fourth quarter of 2018. See "Note 5 - Discontinued Operations" for further details.

New Accounting Standards

On February 25, 2016, the FASB issued Accounting Standard Update ("ASU") 2016-02, Topic 842, Leases, which introduces a lessee model that brings most leases on the balance sheet. The new standard also aligns many of the underlying principles of the new lessor model with those in ASC 606, the FASB’s new revenue recognition standard (e.g., those related to evaluating when profit can be recognized). Furthermore, the ASU addresses other concerns related to the current leases model.

On July 19, 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases, which addresses certain aspects of the new leases standard, including the rate implicit in the lease, impairment of the net investment in the lease, lessee reassessment of lease classification, lessor reassessment of lease term and purchase options, variable payments that depend on an index or rate and certain transition adjustments, among other things. On July, 31, 2018, the FASB issued ASU 2018-11, Codification Improvements to Topic 842, Leases, which provides entities with an additional (and optional) transition method to adopt the new leases standard. Under this new transition method, an entity initially applies the new leases standard at the adoption date and recognizes a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption.

The Company adopted all of the ASU's related to ASC 842 effective January 1, 2019. The Company applied a modified retrospective transition approach. The Company did not elect the practical expedient (1) to reassess the lease classification for any expired or existing leases; (2) to reassess whether any expired or existing contracts are or contain leases and (3) to reassess initial direct costs. The Company elected the hindsight practical expedient to determine the reasonably certain lease term for existing leases and to assess the impairment of its right-of-use assets. While lease classification remained unchanged, hindsight resulted in generally shorter accounting lease terms and useful lives of the corresponding right of use assets. The hindsight analysis also resulted in an approximate negative impact on beginning retained earnings of $7,000, related to the impairment of a right-of-use asset at the Company's New Orleans facility. The Company elected the transitional practical expedient for existing or expired land easements, allowing the Company to elect not to assess whether those land easements are, or contain, leases in accordance with ASC 842. The Company also elected the practical expedient to adjust the carrying amount of the right-of-use assets for the unfavorable lease liability previously recognized on the balance sheet. Additionally, the Company made an accounting policy election that keeps leases with an initial term of 12 months or less off of the balance sheet and resulted in recognizing those lease payments in the Condensed Consolidated Statements of Operations on a straight-line basis over the lease term. Refer to "Note 9 - Leases" for further detail.

On August 28, 2017, the FASB issued ASU 2017-12, which amends the hedge accounting recognition and presentation requirements in ASC 815 to (1) improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities and (2) reduce the complexity of and simplify the application of hedge accounting by preparers. For public business entities, the amendments in ASU 2017-12 are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company believes that the ASU 2017-12 will allow more of its derivative contracts to qualify for hedge accounting elections. The Company adopted ASU 2017-12 effective January 1, 2019, and changes in fair value of derivatives continue to be recognized in current period earnings for the three months ended March 31, 2019.

On November 7, 2018, the FASB issued ASU 2018-16, which permits entities to use the Overnight Index Swap ("OIS") Rate based on Secured Overnight Financing Rate ("SOFR") as an eligible benchmark interest rate during the early stages of the transition from LIBOR to SOFR. For public business entities, the amendments in ASU 2018-16 are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company's adoption of ASU 2018-16 did not have a material impact on its consolidated financial statements.

On June 16, 2016, the FASB issued ASU 2016-13, which amends the Board's guidance on the impairment of financial instruments. The ASU 2016-13 adds to U.S. GAAP an impairment model (known as the current expected credit loss (CECL) model) that is based on expected losses rather than incurred losses. Under this new guidance, an entity recognizes as an allowance its estimate of expected credit losses. For public companies, the ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is evaluating the impact of this guidance, but does not expect it to have any material impact on its consolidated financial statements.

On August 28, 2018, the FASB issued ASU 2018-13, which changes the fair value measurement disclosure requirements of ASC 820. ASU 2018-13 eliminates or modifies certain disclosure requirements of ASC 820 and requires new disclosures relating to changes in unrealized gains or losses included in other comprehensive income for recurring Level 3 fair value

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measurements held at the end of the applicable reporting period. ASU 2018-13 also explicitly requires entities to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU 2018-13 is effective for all entities for fiscal years beginning after December 15, 2019, including interim periods therein. The Company is evaluating the impact of this guidance on its consolidated financial statements, but does not expect the impact to be significant.

NOTE 3 — MARKETABLE SECURITIES

The Company's investments in marketable securities are stated at fair value and are available-for-sale. The following table summarizes the Company's investments in marketable securities:

	March 31, 2019
	Maturity	Gross Amortized Cost		Total Unrealized Gains		Total Unrealized Losses			Fair Value
Commercial paper	Within one year	$	8,485	$	—	$	(1	)	$	8,484
Corporate bonds	Within one year	8,998		—		—			8,998
Total		$	17,483	$	—	$	(1	)	$	17,482

	December 31, 2018
	Maturity	Gross Amortized Cost		Total Unrealized Gains		Total Unrealized Losses			Fair Value
Commercial paper	Within one year	$	22,886	$	—	$	(14	)	$	22,872
Corporate bonds	Within one year	28,074		—		(14		)	28,060
Total		$	50,960	$	—	$	(28	)	$	50,932

NOTE 4 — INVENTORIES

Inventories consist of the following:

	March 31, 2019		December 31, 2018
Raw materials	$	62,319	$	40,348
Work in process	3,967		3,840
Finished goods	154,280		124,712
Total	$	220,566	$	168,900

NOTE 5 — DISCONTINUED OPERATIONS

In the fourth quarter of 2018, concluding a comprehensive strategic assessment of the Company's development-stage industrial biotechnology business, REG Life Sciences, the Company's Board of Directors authorized it to pursue a plan to sell the REG Life Sciences core assets and business. The Company recorded an impairment loss, net of tax, of $11,226 on classifying the REG Life Sciences assets as held for sale reflecting the fair value of the estimated proceeds from the sale, net of costs to sell for the year ended December 31, 2018. This valuation technique is considered as Level 3 pricing category.

REG Life Sciences' results for all periods and for the three months endedMarch 31, 2019 are classified as discontinued operations. There was no income tax impact from discontinued operations for all periods.

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Loss on Discontinued Operations:

	For the three months ended March 31,
	2019			2018
Other revenues	$	1,786		$	1,250
Other costs of goods sold	(2,200		)	(1,138		)
Research and development expense	(1,598		)	(5,564		)
Other income (expense), net	(5		)	1,997
Pre-tax loss from discontinued operations	(2,017		)	(3,455		)
Income tax expense	—			—
Loss on discontinued operations	$	(2,017	)	$	(3,455	)

Reconciliation of the Carrying Amounts of Major Classes of Assets and Liabilities Included in Assets and Liabilities Held for Sale:

	March 31, 2019			December 31, 2018
Machinery and equipment, net	$	824		$	824
In-process research and development	13,652			13,652
Impairment recognized on assets classified as held for sale	(11,226		)	(11,226		)
Total assets classified as held for sale	$	3,250		$	3,250

NOTE 6 — OTHER ASSETS

Prepaid expense and other assets consist of the following:

	March 31, 2019		December 31, 2018
Commodity derivatives and related collateral, net	$	7,367	$	13,799
Prepaid expenses	15,264		17,187
Deposits	1,963		2,123
RIN inventory	3,061		2,000
Taxes receivable	2,365		2,991
Other	3,381		3,069
Total	$	33,401	$	41,169

RIN inventory values were adjusted in the amounts of $0 and $630 at March 31, 2019 and December 31, 2018, respectively, to reflect the lower of cost or net realizable value.

Other noncurrent assets consist of the following:

	March 31, 2019		December 31, 2018
Investments	$	13,199	$	13,053
Spare parts inventory	2,680		2,680
Catalysts	1,810		1,989
Deposits	381		381
Other	2,607		3,167
Total	$	20,677	$	21,270

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NOTE 7— INTANGIBLE ASSETS

Intangible assets consist of the following:

	March 31, 2019
	Cost		Accumulated Amortization			Net
Raw material supply agreement	$	6,230	$	(2,986	)	$	3,244
Renewable diesel technology	8,300		(2,674		)	5,626
Ground lease	200		(160		)	40
Acquired customer relationships	4,747		(1,049		)	3,698
Trademarks	704		—			704
Total intangible assets	$	20,181	$	(6,869	)	$	13,312

	December 31, 2018
	Cost		Accumulated Amortization			Net
Raw material supply agreement	$	6,230	$	(2,866	)	$	3,364
Renewable diesel technology	8,300		(2,536		)	5,764
Ground lease	200		(157		)	43
Acquired customer relationships	4,747		(976		)	3,771
Trademarks	704		—			704
Total intangible assets	$	20,181	$	(6,535	)	$	13,646

The Company recorded intangible amortization expense of $334 and $324 for the three months ended March 31, 2019, and 2018, respectively.

The estimated intangible asset amortization expense for the remainder of 2019 through 2024 and thereafter is as follows:

April 1, 2019 through December 31, 2019	$	1,451
2020	1,672
2021	1,678
2022	1,671
2023	1,678
2024	1,685
2025 and thereafter	3,477
Total	$	13,312

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NOTE 8 — DEBT

The following table shows the Company’s term debt:

	March 31, 2019		December 31, 2018
4.00% Convertible Senior Notes, $96,300 face amount, due in June 2036	$	75,940	$	75,477
2.75% Convertible Senior Notes, $67,380 face amount, due in June 2019	66,849		66,361
REG Danville term loan, secured, variable interest rate of LIBOR plus 4%, due in July 2022	8,548		8,964
REG Ralston term loan, variable interest rate of Prime Rate plus 2.25%, due in October 2025	18,035		18,948
REG Grays Harbor term loan, variable interest of minimum of 3.5% or Prime Rate plus 0.25%, due in May 2022	8,521		8,828
REG Capital term loan, fixed interest rate of 3.99%, due in January 2028	7,121		7,185
Other	47		54
Total term debt before debt issuance costs	185,061		185,817
Less: Current portion of long-term debt	150,339		149,006
Less: Debt issuance costs (net of accumulated amortization of $4,047 and $3,813, respectively)	3,217		3,390
Total long-term debt	$	31,505	$	33,421

2019 Convertible Senior Notes

In June 2014, the Company issued $143,800 in convertible senior notes (the "2019 Convertible Senior Notes") with a maturity date of June 15, 2019, unless earlier converted or repurchased. The 2019 Convertible Senior Notes bear interest at a rate of 2.75% per annum, payable semi-annually in arrears, beginning December 15, 2014. The initial conversion rate is 75.3963 shares of Common Stock per $1,000 principal amount of 2019 Convertible Senior Notes, which represents an initial conversion price of approximately $13.26 per share.

During 2018, the Company bought back $6,311 of principal of the 2019 Convertible Senior Notes. Such notes can be converted at any time on or after December 15, 2018 until such notes mature on June 15, 2019. In accordance with the indenture governing the 2019 Convertible Senior Notes, we have elected to settle all conversions of each $1,000 principal amount of such notes being converted on or after October 23, 2018, with $1,000 in cash and any conversion value in excess of that amount in shares of the Company's common stock.

2036 Convertible Senior Notes

On June 2, 2016, the Company issued $152,000 aggregate principal amount of the 2036 Convertible Senior Notes in a private offering to qualified institutional buyers. The 2036 Convertible Senior Notes bear interest at a rate of 4.00% per year payable semi-annually in arrears on June 15 and December 15 of each year, beginning December 15, 2016. The notes will mature on June 15, 2036, unless repurchased, redeemed or converted in accordance with their terms prior to such date.

Prior to December 15, 2035, the 2036 Convertible Senior Notes will be convertible only upon satisfaction of certain conditions and during certain periods as stipulated in the indenture. On or after December 15, 2035 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders of the 2036 Convertible Senior Notes may convert their notes at any time. The 2036 Convertible Senior Notes may be settled in cash, the Company’s common shares or a combination of cash and the Company’s common shares, at the Company’s election. The Company may not redeem the 2036 Convertible Senior Notes prior to June 15, 2021. Holders of the 2036 Convertible Senior Notes will have the right to require the Company to repurchase for cash all or some of their notes at 100% of their principal, plus any accrued and unpaid interest on each of June 15, 2021, June 15, 2026 and June 15, 2031. Holders of the 2036 Convertible Senior Notes will have the right to require the Company to repurchase for cash all or some of their notes at 100% of their principal, plus any accrued and unpaid interest upon the occurrence of certain fundamental changes. The initial conversion rate is 92.8074 common shares per $1,000 (one thousand) principal amount of 2036 Convertible Senior Notes (equivalent to an initial conversion price of approximately $10.78 per common share).

In addition, the 2036 Convertible Senior Notes will become convertible in the subsequent quarter if the closing price of the Company’s common stock exceeds $14.01, 130% of the Convertible Senior Notes’ initial conversion price, for at least 20

15

trading days during the 30 consecutive trading days prior to each quarter-end date. If the 2036 Convertible Senior Notes become convertible and should the holders elect to convert, the Company’s current intent and policy is to settle the principal amount the 2036 Convertible Senior Notes in cash, with the remaining value satisfied at the Company’s option in cash, stock or a combination of cash and stock. As of March 31, 2019 and December 31, 2018, the early conversion event was met based on the Company's stock price and as a result, the 2036 Convertible Senior Notes have been classified as a current liability on the Company's Condensed Consolidated Balance Sheets at March 31, 2019 and December 31, 2018.

The net proceeds from the offering of the 2036 Convertible Senior Notes were approximately $147,118, after deducting fees and offering expenses of $4,882, which was capitalized as debt issuance costs and is being amortized through June 2036. The debt discount is to be amortized through June 2036. The effective interest rate on the debt liability component was 2.45%.

Lines of Credit

The following table shows the Company's lines of credit:

	March 31, 2019		December 31, 2018
Amount outstanding under lines of credit	$	102,612	$	14,250
Maximum available to be borrowed under lines of credit	$	58,348	$	114,889

The Company's wholly-owned subsidiaries, REG Services Group, LLC and REG Marketing & Logistics Group, LLC, are borrowers under a Credit Agreement dated December 23, 2011 with the lenders party thereto (“Lenders”) and Wells Fargo Capital Finance, LLC, as the agent, (as amended, the “M&L and Services Revolver”). The maximum commitment of the Lenders under the M&L and Services Revolver to make revolving loans is $150,000, subject to an accordion feature, which allows the borrowers to request commitments for additional revolving loans in an aggregate amount not to exceed to $50,000, the making of which is subject to customary conditions, including the consent of Lenders providing such additional commitments.

The maturity date of the M&L and Services Revolver is September 30, 2021. Loans advanced under the M&L and Services Revolver bear interest based on a one-month LIBOR rate (which shall not be less than zero), plus a margin based on Quarterly Average Excess Availability (as defined in the Revolving Credit Agreement), which may range from 1.75% per annum to 2.25% per annum.

The M&L and Services Revolver contains various loan covenants that restrict each subsidiary borrower’s ability to take certain actions, including restrictions on incurrence of indebtedness, creation of liens, mergers or consolidations, dispositions of assets, repurchase or redemption of capital stock, making certain investments, making distributions to the Company unless certain conditions are satisfied, entering into certain transactions with affiliates or changing the nature of the subsidiary’s business. In addition, the subsidiary borrowers are required to maintain a fixed charge coverage ratio of at least 1.0 to 1.0 if excess availability under the M&L and Services Revolver is less than 10% of the total $150,000 of current revolving loan commitments, or $15,000 currently. The M&L and Services Revolver is secured by the subsidiary borrowers’ membership interests and substantially all of their assets. In addition, the M&L and Services Revolver is secured by the accounts receivable and inventory of REG Albert Lea, LLC, REG Houston, LLC, REG New Boston, LLC, REG Geismar, LLC, and REG Seneca, LLC (collectively, the "Plant Loan Parties") subject to a $40,000 limitation with respect to each of the Plant Loan Parties.

REG Germany has a trade finance facility agreement ("Uncommitted Credit Facility Agreement") with BNP Paribas, which allows it to borrow up to $25,000 for funding the purchase of goods and services. Amounts outstanding under the Uncommitted Credit Facility Agreement bear variable interest and are payable as stipulated in the agreement. The amount that can be borrowed under the agreement can be amended, cancelled or restricted at BNP Paribas's sole discretion and therefore is not included in the maximum available to be borrowed under lines of credit above. The Uncommitted Credit Facility Agreement contains various loan covenants that require REG Germany to maintain certain financial measures. At March 31, 2019, the nominal interest rates ranged from 1.50% to 4.39% per annum.

NOTE 9 — LEASES

The Company leases land, property and equipment under certain operating leases. The Company's leases consist primarily of access to distribution terminals, biomass-based diesel and feedstock storage tanks, railcars and vehicles. The Company determines at the inception of a lease whether an arrangement that provides the Company control over the use of an asset is a lease. The Company recognizes at lease commencement a right-of-use ("ROU") asset and lease liability based on the present value of the future lease payments over the lease term. As discussed in Note 2, the Company has elected not to recognize a ROU asset and lease liability for leases with terms of 12 months or less. At the end of the lease term the Company, generally, has the option to (a) return the leased equipment to the lessor, (b) purchase the property at its then fair value or (c)

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renew its lease at the fair rental value on a year-to-year basis or for an agreed upon term. When it is reasonably certain that the Company will exercise the option, the impact of the option is included in the lease term for purposes of determining total future lease payments. As most of its lease agreements do not explicitly state the discount rate implicit in the lease, the Company uses its incremental borrowing rate on the commencement date to calculate the present value of future payments.

The Company's leases commonly include payments that are based on the Consumer Price Index ("CPI") or other similar indices. If the indices are known at inception of the leases, they are included in the calculation of the ROU asset and lease liability. Other variable lease payments, such as usage-based amounts or when the indices are not known at inception, are excluded from the ROU asset and lease liability, and are expensed as incurred.

In addition to the base rent, office equipment leases typically contain provisions for maintenance services, which are considered non-lease components for accounting purposes. For these leases, nonlease components are excluded from our ROU assets and lease liabilities and expensed as incurred. For all other types of leases, we apply a practical expedient to include these non-lease components in calculating the ROU asset and lease liability.

The following table summarizes information about the Company's lease expense for the three months ended March 31, 2019:

	2019
Lease expense:
Operating lease expense	$	5,473
Variable lease expenses	1,764
Short-term and other lease expenses	426
Total lease expense	$	7,663

The weighted-average remaining lease term for the Company's operating leases is 5.81 years at March 31, 2019. The weighted-average discount rate for the Company's operating leases is 4.85% as of March 31, 2019.

For each of the next five calendar years and thereafter, future minimum lease payments and scheduled maturities under operating leases that have initial or remaining noncancelable lease terms in excess of one year are as follows:

	Total payments		Less: Discount		Operating lease obligation
April 1, 2019 through December 31, 2019	$	14,830	$	1,667	$	13,163
2020	15,107		1,565		13,542
2021	11,362		1,003		10,359
2022	3,525		675		2,850
2023	2,759		552		2,207
2024	1,713		472		1,241
2025 and thereafter	11,510		2,383		9,127
Total	$	60,806	$	8,317	$	52,489

As the Company has not restated prior-year information for its adoption of ASC Topic 842, the following presents the Company's future minimum lease payments for operating leases under ASC Topic 840 at December 31, 2018:

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	Total Payments
2019	$	20,326
2020	14,063
2021	10,643
2022	3,162
2023	2,406
Thereafter	13,736
Total minimum payments	$	64,336

NOTE 10 — DERIVATIVE INSTRUMENTS

The Company enters into New York Mercantile Exchange NY Harbor ULSD ("NY Harbor ULSD" or previously referred to as heating oil), CBOT Soybean Oil (previously referred to as soybean oil) and New York Mercantile Exchange Natural Gas futures, swaps and options ("commodity contract derivatives") to reduce the risk of price volatility related to anticipated purchases of feedstock raw materials and to protect cash margins from potentially adverse effects of price volatility on biomass-based diesel sales where prices are set at a future date. All of the Company’s commodity contract derivatives are designated as non-hedge derivatives and recorded at fair value on the Condensed Consolidated Balance Sheets. Unrealized gains and losses are recognized as a component of biomass-based diesel costs of goods sold reflected in current results of operations. As of March 31, 2019, the net notional volumes of NY Harbor ULSD, CBOT Soybean Oil and NYMEX Natural Gas covered under the open commodity derivative contracts were approximately 92 million gallons, 76 million pounds and 2 million million British thermal units, respectively.

The Company offsets the fair value amounts recognized for its commodity contract derivatives with cash collateral with the same counterparty under a master netting agreement. The net position is presented within prepaid and other assets in the Condensed Consolidated Balance Sheets. The following table sets forth the fair value of the Company's commodity contract derivatives and amounts that offset within the Condensed Consolidated Balance Sheets:

	March 31, 2019						December 31, 2018
	Assets			Liabilities			Assets			Liabilities
Gross amounts of derivatives recognized at fair value	$	3,899		$	1,019		$	11,843		$	1,799
Cash collateral	4,487			—			3,755			—
Total gross amount recognized	8,386			1,019			15,598			1,799
Gross amounts offset	(1,019		)	(1,019		)	(1,799		)	(1,799		)
Net amount reported in the condensed consolidated balance sheets	$	7,367		$	—		$	13,799		$	—

The following table sets forth the commodity contract derivatives gains and (losses) included in the Condensed Consolidated Statements of Operations:

	Location of Gain (Loss) Recognized in income	Three Months   Ended   March 31,   2019			Three Months   Ended   March 31,   2018
Commodity derivatives	Cost of goods sold – Biomass-based diesel	$	(22,739	)	$	(2,438	)

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NOTE 11 — FAIR VALUE MEASUREMENT

The fair value hierarchy prioritizes the inputs used in measuring fair value as follows:

• Level 1 — Quoted prices for identical instruments in active markets.

• Level 2 — Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations, in which all significant inputs are observable in active markets.

• Level 3 — Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

A summary of assets (liabilities) measured at fair value is as follows:

	As of March 31, 2019
	Total			Level 1		Level 2		Level 3
Commercial paper	$	8,484		$	—	$	8,484	$	—
Corporate bonds	$	8,998		—		8,998		—
Commodity contract derivatives	$	2,880		508		2,372		—
Contingent considerations for acquisitions	$	(6,849	)	—		—		(6,849		)
	$	13,513		$	508	$	19,854	$	(6,849	)

	As of December 31, 2018
	Total			Level 1		Level 2		Level 3
Commercial paper	$	22,872		$	—	$	22,872	$	—
Corporate bonds	$	28,060		—		28,060		—
Commodity contract derivatives	$	10,044		499		9,545		—
Contingent considerations for acquisitions	$	(9,861	)	—		—		(9,861		)
	$	51,115		$	499	$	60,477	$	(9,861	)

The following is a reconciliation of the beginning and ending balances for liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):

	Contingent Consideration for Acquisitions
	2019			2018
Balance at beginning of period, January 1	$	9,861		$	20,485
Change in estimates included in earnings	304			459
Settlements	(3,316		)	(2,813		)
Balance at end of period, March 31	$	6,849		$	18,131

The estimated fair values of the Company’s financial instruments, which are not recorded at fair value, are as follows:

	As of March 31, 2019						As of December 31, 2018
	Asset (Liability) Carrying Amount			Fair Value			Asset (Liability) Carrying Amount			Fair Value
Financial liabilities:
Debt and lines of credit	$	(287,673	)	$	(450,946	)	$	(200,067	)	$	(410,564	)

The carrying amounts reported in the Condensed Consolidated Balance Sheets for cash and cash equivalents, accounts receivable, accounts payable and accrued expenses approximate their fair values. Money market funds are included in cash and cash equivalents on the Condensed Consolidated Balance Sheets.

The Company used the following methods and assumptions to estimate fair value of its financial instruments:

Marketable securities: The fair value of marketable securities, which include commercial papers and corporate notes/bonds is obtained using quoted prices for similar assets or liabilities in active markets; quoted prices for

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identical or similar assets in markets that are not active and inputs other than quoted prices, e.g., interest rates and yield curves.

Commodity derivatives: The instruments held by the Company consist primarily of futures contracts, swap agreements, purchased put options and written call options. The fair value of contracts based on quoted prices of identical assets in an active exchange-traded market is reflected in Level 1. Contract fair value that is determined based on quoted prices of similar contracts in over-the-counter markets is reflected in Level 2.

Contingent consideration for acquisitions: The fair value of all other contingent consideration is determined using an expected present value technique. Expected cash flows are determined using the probability weighted-average of possible outcomes that would occur should the achievement of certain milestones related to the production and/or sale of biomass-based diesel at the specific production facility. A discount rate ranging from 5.8% to 12.5% is used to estimate the fair value of the expected payments.

Debt and lines of credit: The fair value of long-term debt and lines of credit was established using discounted cash flow calculations and current market rates reflecting Level 2 inputs.

NOTE 12 — NET INCOME (LOSS) PER SHARE

Basic net income (loss) per share is presented in conformity with the two-class method required for participating securities. Participating securities include restricted stock units ("RSUs").

Under the two-class method, net income is reduced for distributed and undistributed dividends earned in the current period. The remaining earnings are then allocated to Common Stock and the participating securities. The Company calculates the effects of participating securities on diluted earnings per share ("EPS") using both the “if-converted or treasury stock” and "two-class" methods and discloses the method which results in a more dilutive effect. The effects of Common Stock options, warrants, stock appreciation rights and convertible notes on diluted EPS are calculated using the treasury stock method unless the effects are anti-dilutive to EPS.

For the 2036 Convertible Senior Notes, the Company’s current intent is to settle conversions using cash for the principal amount of convertible senior notes converted, with the remaining value satisfied at the Company’s option in cash, stock or a combination of cash and stock. For the 2019 Convertible Senior Notes, the Company has elected to settle the principal amount of convertible notes converted with cash and any conversion value in excess of that amount in shares of the Company's common stock. Therefore, the dilutive effect of the convertible senior notes is limited to the conversion premium.

The following potentially dilutive weighted average securities were excluded from the calculation of diluted net income (loss) per share attributable to common stockholders during the periods presented, as the effect was anti-dilutive:

	Three Months   Ended   March 31,   2019	Three Months   Ended   March 31,   2018
Stock appreciation rights	1,012,097	1,006,849
2019 Convertible Senior Notes	2,624,215	5,377,690
2036 Convertible Senior Notes	3,737,641	13,545,060
Total	7,373,953	19,929,599

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The following table presents the calculation of diluted net income (loss) per share attributable to common stockholders:

	Three Months   Ended   March 31,   2019			Three Months   Ended   March 31,   2018
Net income (loss) from continuing operations attributable to the Company’s common stockholders - Basic	$	(41,387	)	$	212,608
Plus (less): effect of participating securities	—			5,236
Net income (loss) attributable to common stockholders	(41,387		)	217,844
Less: effect of participating securities	—			(5,236		)
Net income (loss) from continuing operations attributable to the Company's common stockholders - Diluted	$	(41,387	)	$	212,608
Net loss from discontinued operations attributable to the Company's common stockholders - Basic and Diluted	$	(2,017	)	$	(3,455	)
Net income (loss) attributable to the Company's common stockholders - Basic	$	(43,404	)	$	209,238
Plus (less): effect of participating securities	—			5,151
Net income (loss) attributable to common stockholders	(43,404		)	214,389
Less: effect of participating securities	—			(5,151		)
Net income (loss) attributable to the Company's common stockholders - Diluted	$	(43,404	)	$	209,238
Shares:
Weighted-average shares used to compute basic net income (loss) per share	37,353,352			38,819,443
Adjustment to reflect conversion of convertible notes	—			561,665
Adjustment to reflect stock appreciation right conversions	—			102,979
Weighted-average shares used to compute diluted net income (loss) per share	37,353,352			39,484,087
Net income (loss) per share attributable to common stockholders - Diluted
Continuing operations	$	(1.11	)	$	5.38
Discontinued operations	$	(0.05	)	$	(0.09	)
Diluted net income (loss)	$	(1.16	)	$	5.30

NOTE 13 — REPORTABLE SEGMENTS AND GEOGRAPHIC INFORMATION

The Company reports its reportable segments based on products and services provided to customers. The Company re-assesses its reportable segments on an annual basis. The Company's reportable segments generally align the Company's external financial reporting segments with its internal operating segments, which are based on its internal organizational structure, operating decisions and performance assessment. In the fourth quarter of 2018, concluding a comprehensive strategic assessment of the Company's Life Sciences business, which primarily represented the Renewable Chemicals reportable segment, the Company's Board of Directors authorized it to pursue a plan to sell REG Life Sciences. As a result of this authorization, the Company's reportable segments at March 31, 2019 and for the year ended December 31, 2018 are composed of Biomass-based Diesel, Services and Corporate and other activities. The accounting policies of the segments are the same as those described in the summary of significant accounting policies. All prior period disclosures below have been recast to present results on a comparable basis.

The Biomass-based Diesel segment processes waste vegetable oils, animal fats, virgin vegetable oils and other feedstocks into biomass-based diesel. The Biomass-based Diesel segment also includes the Company’s purchases and resale of biomass-based diesel produced by third parties. Revenue is derived from the purchases and sales of biomass-based diesel, RINs and raw material feedstocks acquired from third parties, sales of biomass-based diesel produced under toll manufacturing arrangements

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with third party facilities, sales of processed biomass-based diesel from Company facilities, related by-products and renewable energy government incentive payments, in the U.S. and internationally.

The Services segment offers services for managing the construction of biomass-based diesel production facilities and managing ongoing operations of third-party plants and collects fees related to the services provided. The Company does not allocate items that are of a non-operating nature or corporate expenses to the business segments. Revenues from services provided to other segments are recorded by the Services segment at cost.

The Corporate and Other segment includes trading activities related to petroleum-based heating oil and diesel fuel as well as corporate activities, which consist of corporate office expenses such as compensation, benefits, occupancy and other administrative costs, including management service expenses. Corporate and Other also includes income/(expense) not associated with the reportable segments, such as corporate general and administrative expenses, shared service expenses, interest expense and interest income, all reflected on an accrual basis of accounting. In addition, Corporate and Other includes cash and other assets not associated with the reportable segments, including investments. Intersegment revenues are reported by the Services and Corporate and Other segments.

The following table represents the significant items by reportable segment:

	Three Months   Ended   March 31,   2019			Three Months   Ended   March 31,   2018
Net sales from continuing operations:
Biomass-based Diesel	$	479,754		$	630,365
Services	19,583			35,215
Corporate and Other	83,903			74,543
Intersegment revenues	(105,031		)	(52,121		)
	$	478,209		$	688,002
Income (loss) from continuing operations before income taxes:
Biomass-based Diesel	$	(40,278	)	$	215,529
Services	(869		)	5,024
Corporate and Other	(670		)	(3,914		)
	$	(41,817	)	$	216,639
Depreciation and amortization expense, net:
Biomass-based Diesel	$	12,024		$	8,037
Services	630			329
Corporate and Other	886			741
	$	13,540		$	9,107
Cash paid for purchases of property, plant and equipment:
Biomass-based Diesel	$	7,688		$	15,603
Services	547			851
Corporate and Other	—			33
	$	8,235		$	16,487

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	March 31, 2019			December 31, 2018
Goodwill:
Services	$	16,080		$	16,080
Assets:
Biomass-based Diesel	$	1,026,539		$	914,843
Services	55,926			63,720
Corporate and Other	407,564			379,658
Intersegment eliminations	(306,880		)	(254,375		)
Assets held for sale	3,250			3,250
	$	1,186,399		$	1,107,096

Geographic Information:

The following geographic data include net sales attributed to the countries based on the location of the subsidiary making the sale and long-lived assets based on physical location. Long-lived assets represent the net book value of property, plant and equipment.

	Three Months   Ended   March 31,   2019		Three Months   Ended   March 31,   2018
Net revenues:
United States	$	438,605	$	639,674
Germany	39,468		46,356
Other Foreign	136		1,972
Non-United States	39,604		48,328
	$	478,209	$	688,002

	March 31, 2019		December 31, 2018
Long-lived assets:
United States	$	569,474	$	571,045
Germany	18,331		18,972
Other Foreign	666		706
	$	588,471	$	590,723

NOTE 14 — COMMITMENTS AND CONTINGENCIES

The Company is involved in legal proceedings in the normal course of business. The Company currently believes that any ultimate liability arising out of such proceedings will not have a material adverse effect on the Company’s financial position, results of operations or cash flows.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This report contains forward-looking statements regarding Renewable Energy Group, Inc., or “we,” “our” or “the Company,” that involve risks and uncertainties such as anticipated financial performance, business prospects, technological developments, products, possible strategic initiatives and similar matters. In some cases, you can identify forward-looking statements by terms such as “may,” “might,” “objective,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “estimate,” “predict,” “potential,” “plan,” or the negative of these terms, and similar expressions intended to identify forward-looking statements.  

These forward-looking statements include, but are not limited to statements about planned capital expenditures; existing or proposed legislation affecting the biomass-based diesel industry, including governmental incentives and tax credits; the

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possible joint development of a renewable diesel plant with Phillips 66; our utilization of forward contracting and hedging strategies to minimize feedstock and other input price risk; our ability to renew existing and expired contracts at similar or more favorable terms; expected technological advances in biomass-based diesel production methods; the potential sale of our life sciences business; statements about using acquired land to improve existing production capacity and future expansion opportunities at our Geismar facility; the market for biomass-based diesel, including the factors that affect such market and our operating results and seasonal fluctuations in demand, and potential biomass-based diesel consumers; our ability to further develop our financial, managerial and other internal controls and reporting systems to accommodate future growth; the potential impact following the establishment of applicable accounting standards; the impact of recent U.S. tax legislation on our financial condition and results of operations; expectations regarding the realization of deferred tax assets and the establishment and maintenance of tax reserves and anticipated trends; expectations regarding our expenses and sales; anticipated general market conditions; anticipated cash needs and estimates regarding capital requirements and needs for additional financing; and challenges in our business and the biomass-based diesel market.

These forward-looking statements are based on management’s current expectations, estimates, assumptions and projections, which are subject to risks and uncertainties. These risks and uncertainties could cause actual results to differ materially from those expected. Given these uncertainties, you should not place undue reliance on these forward-looking statements. Risks and uncertainties include, but are not limited to, those risks discussed in Item 1A Part II in this Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2019. We encourage you to read this Management’s Discussion and Analysis of Financial Condition and Results of Operations in conjunction with the accompanying condensed consolidated financial statements and related notes. Forward-looking statements contained in this report present management’s views only as of the date of this report. Except as required under applicable law, we do not intend to issue updates concerning any future revisions of management’s views to reflect events or circumstances occurring after the date of this report.

Overview

We focus on providing cleaner, lower carbon transportation fuels. We are North America's largest producer of advanced biofuels. We utilize a nationwide production, distribution and logistics system as part of an integrated value chain model designed to convert natural fats, oils and greases into advanced biofuels. We believe our fully integrated approach, which includes acquiring feedstock, managing biorefinery facility construction and upgrades, operating biorefineries, and distributing fuel through a network of terminals, positions us to serve the growing market for cleaner transportation fuels. In 2018, we launched REG Ultra Clean^TM Diesel, which is among the lowest emission diesel fuels on the market today.

We own and operate a network of 14 biorefineries. Twelve biorefineries are located in the United States and two in Germany. Twelve biorefineries produce traditional biodiesel, one produces renewable diesel (“RD”), and one is a fermentation facility. Our thirteen biomass-based diesel production facilities have an aggregate nameplate production capacity of 520 million gallons per year ("mmgy").

We are a lower-cost, lower carbon biomass-based diesel producer. We primarily produce our biomass-based diesel from a wide variety of lower-cost, lower carbon feedstocks, including inedible corn oil, used cooking oil and inedible animal fat. We also produce biomass-based diesel from virgin vegetable oils, such as soybean oil or canola oil, which tend to be higher in price. We believe our ability to process a wide variety of feedstocks at most of our facilities provides us with a cost advantage over many biomass-based diesel producers, particularly those that rely primarily on higher cost virgin vegetable oils.

We also sell petroleum-based diesel fuel and heating oil, which enables us to offer a variety of fuel products to a broader customer base. We sell heating oil and ultra-low sulfur diesel, or ULSD, at terminals throughout the northeastern U.S., as well as BioHeat® blended heating fuel at one of these terminal locations. In 2018, we expanded our sales of biofuel blends to Midwest and West Coast terminal locations and look to potentially expand in other areas across North America and internationally.

Since October 2018, we have been collaborating with Phillip 66 on the possible construction of a large-scale renewable diesel plant in Washington state. The plant would utilize our propriety BioSynfining® technology for the production of renewable diesel. We have not reached a definitive agreement with Phillips 66 with respect to this potential joint development project and there is no assurance that an agreement will be reached.

In the fourth quarter of 2018, concluding a comprehensive strategic assessment of our development-stage industrial biotechnology business, our Board of Directors authorized us to pursue a plan to sell the core assets of REG Life Sciences, which comprised our Renewable Chemicals segment. As a result, the former Renewable Chemicals segment has been valued at the estimated proceeds from the sale less costs to sell, and the operations of the Renewable Chemicals segment have been classified as discontinued operations.

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During the three months ended March 31, 2019, we sold 162 million total gallons of fuel, including 17 million gallons of biomass-based diesel that we purchased from third parties and resold, 11 million biomass-based diesel gallons produced by our facilities in Germany and 44 million petroleum-based diesel gallons. During 2018, we sold 649 million gallons of fuel, which included 45 million biomass-based gallons we purchased from third parties, 45 million biomass-based diesel gallons produced by our facilities in Germany and 119 million petroleum-based diesel gallons.

Our businesses are organized into two reportable segments – the Biomass-based Diesel segment and the Services segment.

Biomass-based Diesel Segment

Our Biomass-based Diesel segment includes:

• the operations of the following biomass-based diesel production refineries:

• a 30 mmgy nameplate biodiesel production facility located in Ralston, Iowa;

• a 35 mmgy nameplate biodiesel production facility located near Houston, Texas;

• a 45 mmgy nameplate biodiesel production facility located in Danville, Illinois;

• a 30 mmgy nameplate biodiesel production facility located in Newton, Iowa;

• a 60 mmgy nameplate biodiesel production facility located in Seneca, Illinois;

• a 30 mmgy nameplate biodiesel production facility located near Albert Lea, Minnesota;

• a 15 mmgy nameplate biodiesel production facility located in New Boston, Texas;

• a 30 mmgy nameplate biodiesel production facility located in Mason City, Iowa;

• a 75 mmgy nameplate renewable diesel production facility located in Geismar, Louisiana;

• a 27 mmgy nameplate biodiesel production facility located in Emden, Germany;

• a 23 mmgy nameplate biodiesel production facility located in Oeding, Germany;

• a 100 mmgy nameplate biodiesel production facility located in Grays Harbor, Washington; and

• a 20 mmgy nameplate biodiesel production facility located in DeForest, Wisconsin.

• purchases and resales of biomass-based diesel, petroleum-based diesel, RINs and LCFS credits, and raw material feedstocks acquired from third parties;

• sales of biomass-based diesel produced under toll manufacturing arrangements with third-party facilities using our feedstocks; and

• incentives received from federal and state programs for renewable fuels.

We derive a small portion of our revenues from the sale of co-products of the biomass-based diesel production process. For the three months ended March 31, 2019 and for 2018, our revenues from the sale of co-products were less than five percent of our total Biomass-based diesel segment revenues. For the three months ended March 31, 2019 and 2018, revenues from the sale of petroleum-based heating oil and diesel fuel acquired from third parties, along with the sale of these items further blended with biodiesel produced by our facilities or purchased from third parties, were approximately 18% and 10% of our total revenues, respectively.

In accordance with EPA regulations, we generate 1.5 to 1.7 RINs for each gallon of biomass-based diesel we produce. RINs are used to track compliance with Renewable Fuel Standard 2, or RFS2, using the EPA moderated transaction system, or EMTS. RFS2 allows us to attach between zero and 2.5 RINs to any gallon of biomass-based diesel we sell. When we attach RINs to a sale of biomass-based diesel gallons, a portion of our selling price for a gallon of biomass-based diesel is generally attributable to RFS2 compliance; but no cost is allocated to the RINs generated by our biomass-based diesel production because RINs are a form of government incentive and not a result of the physical attributes of the biomass-based diesel production. In addition, RINs, once obtained through the production and sale of gallons of biomass-based diesel, may be separated by the acquirer and sold separately. We regularly obtain RINs from third parties for resale, and the value of these RINs is reflected in “Prepaid expenses and other assets” on our Condensed Consolidated Balance Sheets. At each balance sheet date, this RIN inventory is valued at the lower of cost or net realizable value and any resulting adjustments are reflected in our cost of goods sold for the period. The cost of RINs obtained from third parties is determined using the average cost method. Because we do not allocate costs to RINs generated by our biomass-based diesel production, fluctuations in the value of our RIN inventory represent fluctuations in the value of RINs we have obtained from third parties. RINs significantly decreased in value during the first quarter of 2019, which we believe has been influenced by spreads and record levels of Small Refiner Exemptions from RIN compliance requirements for 2016 and 2017.

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The table below summarizes our RINs balances available to be sold and the median closing price per RIN at March 31, 2019 and December 31, 2018 according to the Oil Pricing Information System ("OPIS"):

	Quantity		OPIS Median Closing Price per RIN
	March 31, 2019	December 31, 2018	March 31, 2019		December 31, 2018
Biomass-based diesel RINs	16,570,967	12,561,167	$	0.38	$	0.55
Advanced biofuels RINs	6,087,245	3,907,803	$	0.33	$	0.51

We generate Low Carbon Fuel Standard credits for our low carbon fuels or blendstocks when our qualified low carbon fuels are imported into states that have adopted an LCFS program. As a result, a portion of the selling price for a gallon of biomass-based diesel sold into an LCFS market is also attributable to LCFS compliance. Like RINs, LCFS credits that we generate are a form of government incentive and not a result of the physical attributes of the biomass-based diesel production. Therefore, no cost is allocated to the LCFS credit when it is generated, regardless of whether the LCFS credit is transferred with the biomass-based diesel produced or held by us. LCFS prices increased in the first quarter of 2019, which we believe was largely attributable to growing demand for LCFS credits.

The below table summarizes approximate amounts of our LCFS credits available to be sold and the median closing price per LCFS credit at March 31, 2019 and December 31, 2018 according to OPIS:

	Quantity		OPIS Median Closing Price per LCFS Credit
	March 31, 2019	December 31, 2018	March 31, 2019		December 31, 2018
California LCFS	12,000	29,800	$	191.00	$	195.00
Oregon LCFS	19,000	25,900	$	155.00	$	137.50

When California extended its LCFS program in 2018, it revised the process for generating credits under the LCFS program to improve reporting and reduce the number of entities required to undergo an audit under the new verification program.  This revised process effectively pushed LCFS credit generation from three month deferral to four month deferral.  The law took effect at the beginning of 2019 and we believe this will have a negative impact on our second quarter profitability because LCFS credits earned in the first quarter of 2019 will not be received and available for sale until the third quarter of 2019.  

Services Segment

Our Services segment, which primarily provides services to our Biomass-based Diesel Segment, includes:

• biomass-based diesel facility management and operational services, whereby we provide day-to-day management and operational services to biomass-based diesel production facilities; and

• construction management services, whereby we act as the construction management and general contractor for the construction of biomass-based diesel production facilities.

During recent years, we have utilized our construction management expertise internally to upgrade our facilities, such as our facilities located in Ralston, Albert Lea, New Boston, Mason City and Newton. In March 2018, we completed the expansion project at our Ralston facility. We plan to improve and utilize the new acreage to support existing production capacity and future expansion opportunities using the Services segment.

Factors Influencing Our Results of Operations

The principal factors affecting our results of operations and financial conditions are the market prices for biomass-based diesel and the feedstocks used to produce biomass-based diesel, as well as governmental programs designed to create incentives or requirements for the production and use of cleaner renewable fuels.

Governmental programs favoring biomass-based diesel production and use

Biomass-based diesel has historically been more expensive to produce than petroleum-based diesel. The biomass-based diesel industry’s growth has largely been the result of federal and state programs that require or incentivize production and use of biomass-based diesel, which allows biomass-based diesel to be priced competitively with petroleum-based diesel.

RFS2 was implemented in 2010, stipulating volume requirements for the amount of biomass-based diesel and other advanced biofuels that must be utilized in the United States each year. Under RFS2, Obligated Parties, including petroleum refiners and fuel importers, must show compliance with these standards. Currently, biodiesel and renewable diesel satisfy three

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categories of an Obligated Party’s annual renewable fuel required volume obligation, or RVO—biomass-based diesel, advanced biofuel and renewable fuel. The final RVO targets for the biomass-based diesel and advanced biofuels volumes for the years 2015 to 2020 as set or proposed by the EPA are as follows:

	2015	2016	2017	2018	2019	2020
Biomass-based diesel	1.73 billion gallons	1.90 billion gallons	2.00 billion gallons	2.10 billion gallons	2.10 billion gallons	2.43 billion gallons
Total Advanced biofuels	2.88 billion RINs*	3.61 billion RINs*	4.28 billion RINs*	4.29 billion RINs*	4.92 billion RINs*	**

*Ethanol equivalent gallons

**To be established by EPA in a rule making later in 2019

The federal biodiesel mixture excise tax credit, or the BTC, has historically provided a $1.00 refundable tax credit per gallon to the first blender of biomass-based diesel with petroleum-based diesel fuel. The BTC became effective January 1, 2005, but since January 1, 2010 it has been allowed to lapse and then been reinstated a number of times. For example, the BTC lapsed on January 1, 2014, was retroactively reinstated for 2014 on December 19, 2014 and then lapsed again on January 1, 2015. On December 18, 2015, the BTC was reinstated for 2015 and extended for 2016. The BTC again lapsed on January 1, 2017 and was reinstated on a retroactive basis for 2017 on February 9, 2018. It has not been retroactively reinstated for 2018 and is not currently in effect for 2019.

As a result of this history of retroactive reinstatement of the BTC, we and many other biomass-based diesel industry producers have adopted contractual arrangements with customers and vendors specifying the allocation and sharing of any retroactively reinstated incentive. The reinstatement of the 2017 BTC resulted in a $205 million net benefit to our net income for the year ended December 31, 2018 and Adjusted EBITDA for the year ended December 31, 2017, with another $11 million related to products delivered and sales recognized in the first quarter of 2018. It is uncertain whether the BTC will be reinstated for 2018 or later years and if reinstated, whether it would be reinstated retroactively or on the same terms. The modification or failure to reinstate the BTC could have a material adverse effect on our financial results. As of March 31, 2019 and 2018, we estimate that if the BTC is reinstated on the same terms as in 2017, our Adjusted EBITDA for business conducted in the periods would increase by approximately $55 million and $43 million for the quarters ending March 31, 2019 and March 31, 2018, respectively.

Biomass-based diesel and feedstock price fluctuations

Our operating results generally reflect the relationship between the price of biomass-based diesel, including credits and incentives, and the price of feedstocks used to produce biomass-based diesel.

Biomass-based diesel is a cleaner low carbon, renewable alternative to petroleum-based diesel fuel and is primarily sold to the end user after it has been blended with petroleum-based diesel fuel. Biomass-based diesel prices have historically been heavily influenced by petroleum-based diesel fuel prices. Accordingly, biomass-based diesel prices have generally been impacted by the same factors that affect petroleum prices, such as crude oil supply and demand balance, worldwide economic conditions, wars and other political events, OPEC production quotas, changes in refining capacity and natural disasters.

Regulatory and legislative factors also influence the price of biomass-based diesel. Biomass-based diesel RIN pricing, a value component that was introduced via RFS2 in July 2010, has had a significant impact on biomass-based diesel pricing. The following table shows for 2017, 2018 and the first three months of 2019 the high and low average monthly contributory value of RINs, as reported by OPIS, to the average B100 spot price of a gallon of biodiesel, as reported by The Jacobsen, in terms of dollars per gallon.

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At the beginning of 2019, the value of RINs, as reported by OPIS, to the average B100 spot price of a gallon of biodiesel was $0.86 per gallon. The value of RINs to the average B100 spot price of a gallon of biodiesel dropped to $0.57 per gallon at the end of March 2019. It reached a high of $0.87 per gallon of biodiesel in January 2019 and a low of $0.53 per gallon in March 2019. The RIN market was largely operating as expected as lower feedstock prices increased the spread between feedstocks and fuels and RINs came down in value. We believe that the decrease in RIN value during the first quarter of 2019 and during 2018 was also heavily influenced by record levels of Small Refiner Exemptions from RIN compliance requirements for 2016 and 2017. We enter into forward contracts to sell RINs and we use risk management position limits to manage RIN exposure.

During 2018, feedstock expense accounted for 78% of our production cost, while methanol and chemical catalysts expense accounted for 5% and 3% of our costs of goods sold, respectively.

Feedstocks for biomass-based diesel production, such as inedible oil, used cooking oil, inedible animal fat, canola oil and soybean oil are commodities and market prices for them will be affected by a wide range of factors unrelated to the price of biomass-based diesel and petroleum-based diesel. There are a number of factors that influence the supply and price of our feedstocks, such as the following: biomass-based diesel demand; export demand; government policies and subsidies; weather conditions; ethanol production; cooking habits and eating habits; number of restaurants near collection facilities; hog/beef/poultry supply and demand; palm oil supply; soybean meal demand and/or production, and crop production both in the U.S. and South America.

During 2018, 77% of the feedstocks used in our operations comprised inedible corn oil, used cooking oil and inedible animal fats with the remainder coming from virgin vegetable oil.

The graph below illustrates the spread between the cost of producing one gallon of biodiesel made from soybean oil to the cost of producing one gallon of biodiesel made from the specified lower-cost feedstock for the period January 2017 to March 31, 2019. The results were derived using assumed conversion factors for the yield of each feedstock and subtracting the cost of producing one gallon of biodiesel made from each respective lower-cost feedstock from the cost of producing one gallon of biodiesel made from soybean oil.

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(1) Used cooking oil ("UCO") prices are based on the monthly average of the daily low sales price of Missouri River yellow grease as reported by The Jacobsen (based on 8.5 pounds per gallon).

(2) Inedible corn oil ("ICO") prices are reported as the monthly average of the daily distillers’ corn oil market values delivered to Illinois as reported by The Jacobsen (based on 8.2 pounds per gallon).

(3) Choice white grease ("CWG") prices are based on the monthly average of the daily low prices of Missouri River choice white grease as reported by The Jacobsen (based on 8.0 pounds per gallon).

(4) Soybean oil (crude) ("SBO") prices are based on the monthly average of the daily closing sale price of the nearby soybean oil contract as reported by CBOT (based on 7.5 pounds per gallon).  

Our results of operations generally will benefit when the spread between biomass-based diesel prices and feedstock prices widens and will be harmed when this spread narrows. The following graph shows feedstock cost data for choice white grease and soybean oil on a per gallon basis compared to the per gallon sale price data for biodiesel, and the spread between biodiesel and each of soybean oil and choice white grease, from January 2017 to March 2019.

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(1) Biodiesel prices are based on the monthly average of the midpoint of the high and low prices of B100 (Upper Midwest) as reported by The Jacobsen.

(2) Soybean oil (crude) prices are based on the monthly average of the daily closing sale price of the nearby soybean oil contract as reported by CBOT (based on 7.5 pounds per gallon).

(3) Choice white grease prices are based on the monthly average of the daily low price of Missouri River choice white grease as reported by The Jacobsen (based on 8.0 pounds per gallon).

(4) Spread between biodiesel price and choice white grease price.

(5) Spread between biodiesel price and soybean oil (crude) price.

During the first three months of 2019, NY Harbor ULSD prices ranged from a low of $1.70 per gallon in January to a high of $2.04 per gallon in February with the average price for the first quarter of $1.94 per gallon, down $0.13 from the fourth quarter of 2018 average of $2.07 per gallon. Energy prices sharply increased in early January, stabilized through mid-February and increased again in late February before settling into a trading range for the remainder of the quarter. The primary drivers of the increase in energy prices were high compliance rates for OPEC production cuts along with optimism over trade talks between the United States and China. U.S. biodiesel prices traded in a narrow range during the first quarter with Jacobsen Upper Midwest B100 prices reaching a high of $2.89 in February after reaching a low of $2.74 in January.

Soybean oil prices ranged from a high of $0.31 per pound in February 2019 to a low of $0.28 per pound in January 2019 with an average price for the quarter of $0.29 per pound. Soybean oil prices remained within a relatively narrow range due to high soybean crush rates and limited export demand from China. Strong consumer demand for meats, unusually high export demand for hogs from China due to African swine flu, and increasing industry capacity has continued to lead to expansions in the U.S. hog and cattle markets.  Both hog and cattle slaughter numbers in the U.S. in the first three months of 2019 were higher year over year.

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Risk Management

The profitability of producing biomass-based diesel largely depends on the spread between prices for feedstocks and biomass-based diesel, including incentives, each of which is subject to fluctuations due to market factors and each of which is not significantly correlated. Adverse price movements for these commodities directly affect our operating results. We attempt to protect cash margins for our own production and our third-party trading activity by entering into risk management contracts that mitigate the impact on our margins from price volatility in feedstocks and biomass-based diesel. We create offsetting positions by using a combination of forward fixed-price physical purchases and sales contracts on feedstock and biomass-based diesel and risk management futures contracts, swaps and options primarily on the New York Mercantile Exchange NY Harbor ULSD and CBOT Soybean Oil; however, the extent to which we engage in risk management activities varies substantially from time to time, and from feedstock to feedstock, depending on market conditions and other factors. In making risk management decisions, we utilize research conducted by outside firms to provide additional market information in addition to our internal research and analysis.

Inedible corn oil, used cooking oil, inedible animal fat, canola oil and soybean oil were the primary feedstocks we used to produce biomass-based diesel in 2018 and the first three months of 2019. We utilize several varieties of inedible animal fat, such as beef tallow, choice white grease and poultry fat derived from livestock. There is no established futures market for these lower-cost feedstocks. The purchase prices for lower-cost feedstocks are generally set on a negotiated flat price basis or spread to a prevailing market price reported by the USDA price sheet or The Jacobsen. Our efforts to risk manage against changing prices for inedible corn oil, used cooking oil and inedible animal fat have involved entering into futures contracts, swaps or options on other commodity products, such as CBOT soybean oil and New York Mercantile Exchange NY Harbor ULSD. However, these products do not always experience the same price movements as lower-cost feedstocks, making risk management for these feedstocks challenging. We manage feedstock supply risks related to biomass-based diesel production in a number of ways, including, where available, through long-term supply contracts. The purchase price for soybean oil under these contracts may be indexed to prevailing CBOT soybean oil market prices with a negotiated market basis. We utilize futures contracts, swaps and options to risk manage, or lock in, the cost of portions of our future feedstock requirements generally for varying periods up to one year.

Our ability to mitigate our risk of falling biomass-based diesel prices is limited. We have entered into forward contracts to supply biomass-based diesel. However, pricing under these forward sales contracts generally has been indexed to prevailing market prices, as fixed price contracts for long periods on acceptable terms have generally not been available. There is no established derivative market for biomass-based diesel in the United States. Our efforts to hedge against falling biomass-based diesel prices generally involve entering into futures contracts, swaps and options on other commodity products, such as diesel fuel and New York Mercantile Exchange NY Harbor ULSD. However, price movements on these products are not highly correlated to price movements of all of the contract components in aggregate of biomass-based diesel.

We generate 1.5 to 1.7 biomass-based diesel RINs for each gallon of biomass-based diesel we produce and sell. We also obtain RINs from third-party transactions which we hold for resale. There is no established futures market for biomass-based diesel RINs, which severely limits the ability to risk manage the price of RINs. We enter into forward contracts to sell RINs, and we use risk management position limits to manage RIN exposure, however, pricing under those forward contracts generally has been indexed to prevailing market prices as fixed price contracts for long periods have generally not been available.

As a result of our strategy, we frequently have gains or losses on derivative financial instruments that are conversely offset by losses or gains on forward fixed-price physical contracts on feedstocks and biomass-based diesel or inventories. Gains and losses on derivative financial instruments are recognized each period in operating results while corresponding gains and losses on physical contracts are generally not recognized until quantities are delivered or title transfers which may be in the same or later periods. Our results of operations are impacted when there is a period mismatch of recognized gains or losses associated with the change in fair value of derivative instruments used for risk management purposes at the end of the reporting period but the purchase or sale of feedstocks or biomass-based diesel has not yet occurred resulting in the offsetting gain or loss that will be recognized in a later accounting period.

We recorded risk management losses of $22.7 million from our derivative financial instrument activity for the three months ended March 31, 2019, compared to losses of $2.4 million for the three months ended March 31, 2018. Changes in the value of these futures, swaps or options instruments are recognized in current income or loss.

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Increasing importance of renewable diesel

Renewable diesel has become an increasingly significant part of our business. Renewable diesel carries a premium price to biodiesel as a result of a variety of factors including the ability to blend it with petroleum diesel seamlessly, better cold weather performance, and because it generates more RINs on a per gallon basis. We estimate that our renewable diesel production facility in Geismar, Louisiana generated more than half of our adjusted EBITDA in 2019. We experienced two fires at this facility in 2015 that each resulted in the plant being shut down for a lengthy period. If production at this facility were interrupted again due to a fire or for any other reason, it would have a disproportionately significant and material adverse impact on our results of operations and financial condition.

Seasonality

Our operating results are influenced by seasonal fluctuations in the demand for biodiesel. Our biodiesel sales tend to decrease during the winter season due to reduced blending concentrations to adjust for performance during colder weather. Colder seasonal temperatures can cause the higher cloud point biodiesel we make from inedible animal fats to become cloudy and eventually gel at a higher temperature than petroleum-based diesel, renewable diesel, or lower cloud point biodiesel made from soybean oil, canola oil or inedible corn oil. Such gelling can lead to plugged fuel filters and other fuel handling and performance problems for customers and suppliers. Reduced demand in the winter for our higher cloud point biodiesel can result in excess supply of such higher cloud point biodiesel and lower prices for such biodiesel. In addition, most of our biodiesel production facilities are located in colder Midwestern states in proximity to feedstock origination, and our costs of shipping can increase as more biodiesel is transported to warmer climate geographies during winter. To mitigate some of these seasonal fluctuations, we have upgraded our Newton and Danville biorefineries to produce distilled biodiesel from low-cost feedstocks, which has improved cold-weather performance.

RIN prices may also be subject to seasonal fluctuations. The RIN is dated for the calendar year in which it is generated, commonly referred to as the RIN vintage. Since 20% of the annual RVO of an Obligated Party (as defined under the RFS2) can be satisfied by prior year RINs, most RINs must come from biofuel produced or imported during the RVO year. As a result, RIN prices can be expected to decrease as the calendar year progresses if the RIN market is oversupplied compared to that year's RVO and increase if it is undersupplied. We believe that the record levels of Small Refiner Exemptions ("SREs") from RIN compliance requirements for 2016 and 2017 have also significantly impacted RIN prices. See chart below for comparison between actual RIN generation and RVO level for Advanced Biofuel as set by the EPA and the impact of the SREs.

Year	RIN Generation (Advanced Biofuel)	Finalized RVO level for Advanced Biofuel	Estimated Advanced Biofuel RVO Exempted due to SREs
2017	4.23 billion RINs	4.28 billion RINs*	0.40 billion RINs
2018	4.34 billion RINs	4.29 billion RINs*	**
YTD Q1-2019	0.99 billion RINs	4.92 billion RINs*	**

*Ethanol equivalent gallons

**Information not yet available

Industry capacity, production and imports

Our operating results are influenced by our industry’s capacity and production, including in relation to RFS2 production requirements. Under RFS2, Obligated Parties are entitled to satisfy up to 20% of their annual requirement with prior year RINs. Biomass-based diesel production and/or imports, as reported by EMTS, were 2.50 billion gallons for 2017, 100 million gallons lower than 2016. The amount of biomass-based diesel produced and/or imported into the U.S in 2018 was 2.50 billion gallons. In the first three months of 2019, according to EMTS data, 0.57 billion gallons of biomass-based diesel were produced and/or imported into the U.S., compared to the equivalent 0.51 billion gallons over the same period in 2018.

The amount of imported biodiesel gallons qualifying under RFS2 decreased from 662.1 million gallons in 2017 to approximately 371.6 million gallons in 2018, according to the Energy Information Administration ("EIA"). Imported gallons will likely make up less of a percentage of the RVO in 2019 as a result of the anti-dumping and countervailing duty trade case.

Critical Accounting Policies

Our discussion and analysis of our financial condition and results of operations is based upon our financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amount of assets, liabilities, equities, revenues and expenses and related disclosure of contingent assets and liabilities. We evaluate our estimates on an ongoing basis. We base our estimates on historical experience and on various other assumptions that we believe to be

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reasonable under the circumstances, the results of which form the basis for judgments we make about the carrying values of assets and liabilities that are not readily apparent from other sources. Because these estimates can vary depending on the situation, actual results may differ from the estimates.

We have disclosed under the heading “Critical Accounting Policies” in our Annual Report on Form 10-K for the year ended December 31, 2018 the critical accounting policies which materially affect our financial statements. There have been no material changes from the critical accounting policies previously disclosed. You should carefully consider the critical accounting policies set forth in our Annual Report on Form 10-K.

Results of Operations

Three months ended March 31, 2019 and 2018

Set forth below is a summary of certain financial information (dollars in thousands and gallons in millions except for per gallon data) for the periods indicated:

	Three Months Ended March 31,
	2019			2018
Gallons sold	162.5			135.3
Average biomass-based diesel price per gallon (BTC net benefit adjusted ASP of $3.18 for the three months ended March 31, 2018)	$	2.65		$	5.29
Revenues from continuing operations	$	478,209		$	688,002
Cost of goods sold from continuing operations	491,001			438,547
Gross profit (loss) from continuing operations	(12,792		)	249,455
Selling, general and administrative expenses	25,145			31,654
Research and development expense	209			1,034
Income (loss) from operations	(38,146		)	216,767
Other expenses, net	(3,671		)	(126		)
Income tax benefit (expense)	430			1,203
Net income (loss) from continuing operations attributable to the Company	(41,387		)	217,844
Net loss from discontinued operations attributable to the Company	(2,017		)	(3,455		)
Net income (loss) to the Company	$	(43,404	)	$	214,389
Effect of participating share-based awards on continuing operations	—			5,236
Net income (loss) from continuing operations attributable to the Company's common stockholders	$	(41,387	)	$	212,608
Net loss from discontinued operations attributable to the Company's common stockholders	$	(2,017	)	$	(3,455	)

Continuing Operations:

Revenues. In the three months ended March 31, 2018, we recognized government incentives revenue of approximately $365 million due to the retroactive reinstatement of the 2017 BTC, resulting in a net increase of $220.2 million in biomass-based diesel revenues. The BTC has not been reinstated for 2018 or 2019, and accordingly we did not recognize any BTC revenue in the three months ended March 31, 2019. Primarily as a result of the absence of BTC revenues in the 2019 period, our revenues decreased by $209.8 million, or 30%, for the three months ended March 31, 2019, as compared to March 31, 2018. The decrease in total revenues was also attributable to a reduction in revenues from separated RIN sales and a drop in the average biomass-based diesel selling price, which was partially offset by a 20% increase in gallons sold in the first quarter of 2019.

Gallons sold in the first quarter of 2019 increased by 27.2 million gallons, or 20%. The increase in gallons sold for the three months ended March 31, 2019 accounted for a revenue increase of $72.1 million using the 2019 average sales price, after adjusting for the impact of the 2017 BTC. Our average biomass-based diesel sales price per gallon decreased $2.64, or 50%, for the three months ended March 31, 2019. The average biomass-based diesel sales price per gallon after adjustment for the 2017 BTC decreased $0.53, or 17%, for the three months ended March 31, 2019. The decrease in adjusted average sales price contributed to a $71.7 million decrease in revenues for the three months ended March 31, 2019, when applied to the number of

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gallons sold in 2018. Sales of separated RIN inventory were $22.5 million for the three months ended March 31, 2019, as compared to $47.2 million for the three months ended March 31, 2018. The decrease in average selling price per gallon was primarily due to D4 RIN prices in the first quarter of 2019 that were $0.28 per RIN lower on average compared to the first quarter of 2018, according to OPIS.

Costs of goods sold. Our costs of goods sold increased $52.5 million, or 12%, for the three months ended March 31, 2019. Costs of goods sold as a percentage of revenues were 103% for the three months ended March 31, 2019 and 64% for the three months ended March 31, 2018, primarily due to the recognition of the 2017 BTC in full as revenues in the first quarter of 2018, coupled with larger risk management losses compared to the losses in 2018 and a reduced spread between biomass-based diesel prices and feedstock costs.

Average prices for lower-cost feedstocks used in our production were $0.26 per pound for the three months ended March 31, 2019, as compared to $0.26 per pound for the three months ended March 31, 2018. Average soybean oil costs were $0.30 per pound for three months ended March 31, 2019, as compared to $0.36 per pound for the three months ended March 31, 2018. Average canola oil costs were $0.33 per pound for the three months ended March 31, 2019, as compared to $0.35 per pound for the three months ended March 31, 2018. We recorded risk management losses of $22.7 million from our derivative financial instrument activity for the three months ended March 31, 2019, compared to risk management losses of $2.4 million for the three months ended March 31, 2018. Costs of goods sold for separated RIN inventory sales were $6.6 million for the three months ended March 31, 2019, and $32.7 million for the three months ended March 31, 2018. We did not record a lower of cost or net realizable value write down on RINs in the three month period, compared to write downs of $1.0 million during the three months ended March 31, 2018.

Selling, general and administrative expenses. Our selling, general and administrative, or SG&A, expenses were $25.1 million for the first quarter of 2019, or 5% of total revenue in the period, and $31.7 million, or 5% of total revenue, in the same period of 2018. The $6.5 million, or 21%, reduction resulted primarily from higher employee related compensation recorded in the first quarter of 2018 arising from the Company's strong financial performance in 2017.

Other income (expense), net. Other expense was $3.7 million for the three months ended March 31, 2019, compared to other expense of $0.1 million for the same period in 2018. Other income (expense) is primarily comprised of change in value of contingent consideration, loss on debt extinguishment, gain from involuntary conversion, interest expense, interest income and other non-operating items. The gain from involuntary conversion related to the fire at our Madison facility reduced the overall other expense for the three months ended March 31, 2018 as compared to 2019.

Income tax expense. We recognized an income tax benefit of $0.4 million for the three months ended March 31, 2019, as compared to tax benefit of $1.2 million for the same period in 2018. Our tax provision for an interim period is determined using an estimate of our annual effective tax rate, adjusted for discrete items arising in that quarter.  Our effective tax rate differs from the statutory tax rate primarily due to the fact that we have a valuation allowance on our domestic deferred tax assets and most of our foreign deferred tax assets.

Effects of participating share-based awards. Effects of participating share-based awards was $0.0 million for the three months ended March 31, 2019, and $5.2 million for the same period in 2018.

Discontinued Operations:

Net loss from discontinued operations was attributable to the research and development activities at the REG Life Sciences business. The decrease in the net loss compared to 2018 was attributable to management's cost containment efforts and an increase in joint development agreement revenues.

Non - GAAP Financial Measures:

Adjusted EBITDA

Earnings before interest, taxes, depreciation and amortization ("EBITDA") and adjusted EBITDA are not measures of financial performance under GAAP. We use EBITDA and EBITDA adjusted for certain additional items, identified in the table below, or Adjusted EBITDA, as a supplemental performance measure. We present EBITDA and Adjusted EBITDA because we believe they assist investors in analyzing our performance across reporting periods on a consistent basis by excluding items that we do not believe are indicative of our core operating performance. In addition, we use Adjusted EBITDA to evaluate, assess and benchmark our financial performance on a consistent and a comparable basis and as a factor in determining incentive compensation for our executives.

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In the fourth quarter of 2018, the operations of REG Life Sciences has been classified as discontinued operations.  Beginning in the first quarter of 2019, we are excluding the results from these discontinued operations from the calculation of Adjusted EBITDA. The corresponding prior period amounts have been reclassified to conform with the current period presentation. The following table provides our EBITDA and Adjusted EBITDA for the periods presented, as well as a reconciliation to net income (loss) from continuing operations:

(In thousands)	Three Months   Ended   March 31,   2019			Three Months   Ended   March 31,   2018
Net income (loss) from continuing operations	$	(41,387	)	$	217,844
Adjustments:
Income tax benefit	(430		)	(1,203		)
Interest expense	4,219			4,651
Depreciation	9,099			8,739
Amortization	334			42
EBITDA	$	(28,165	)	$	230,073
Gain on involuntary conversion	—			(4,000		)
Gain on sale of assets	—			(990		)
Change in fair value of contingent consideration	304			458
Gain on debt extinguishment	2			232
Other income, net	(854		)	(225		)
Straight-line lease expense	—			(33		)
Executive severance	—			165
Non-cash stock compensation	1,353			1,794
Adjusted EBITDA excluding 2017 BTC allocation	$	(27,360	)	$	227,474
Biodiesel tax credit (1)	—			(206,521		)
Adjusted EBITDA	$	(27,360	)	$	20,953

⁽¹⁾ On February 9, 2018, the Biodiesel Mixture Excise Tax Credit ("BTC") was retroactively reinstated for the 2017 calendar year. The retroactive credit for 2017 resulted in a net benefit to us that was recognized in the first quarter of 2018 for GAAP purposes. Because this credit relates to the 2017 full year operating performance and results, we removed the net benefit of the 2017 BTC from our 2018 results.

Adjusted EBITDA is a supplemental performance measure that is not required by, or presented in accordance with, generally accepted accounting principles, or GAAP. Adjusted EBITDA should not be considered as an alternative to net income or any other performance measure derived in accordance with GAAP, or as an alternative to cash flows from operating activities or a measure of our liquidity or profitability. Adjusted EBITDA has limitations as an analytical tool, and should not be considered in isolation, or as a substitute for any of our results as reported under GAAP. Some of these limitations are:

• Adjusted EBITDA does not reflect our cash expenditures for capital assets or the impact of certain cash charges that we consider not to be an indication of our ongoing operations;

• Adjusted EBITDA does not reflect changes in, or cash requirements for, our working capital requirements;

• Adjusted EBITDA does not reflect the interest expense, or the cash requirements necessary to service interest or principal payments, on our indebtedness;

• although depreciation and amortization are non-cash charges, the assets being depreciated and amortized will often have to be replaced in the future, and Adjusted EBITDA does not reflect cash requirements for such replacements;

• stock-based compensation expense is an important element of our long term incentive compensation program, although we have excluded it as an expense when evaluating our operating performance;

• Adjusted EBITDA does not include loss from discontinued operations. Loss from discontinued operations mainly relates to the research and development activities of REG Life Sciences; and

• other companies, including other companies in the industry, may calculate these measures differently than we do, limiting their usefulness as a comparative measure.

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Liquidity and Capital Resources

Sources of liquidity. At March 31, 2019, the total of our cash and cash equivalents and marketable securities was $140.5 million, compared to $174.5 million at December 31, 2018. At March 31, 2019, we had total assets of $1,186.4 million, compared to $1,107.1 million at December 31, 2018. At March 31, 2019, we had term debt before debt issuance costs of $185.1 million, compared to term debt of $185.8 million at December 31, 2018. Our debt is subject to various financial covenants. We were in compliance with all financial covenants associated with the borrowings as of March 31, 2019.

Our term debt (in thousands) is as follows:

	March 31, 2019		December 31, 2018
4.00% Convertible Senior Notes, $96,300 face amount, due in June 2036	$	75,940	$	75,477
2.75% Convertible Senior Notes, $67,380 face amount, due in June 2019	66,849		66,361
REG Danville term loan, secured, variable interest rate of LIBOR plus 4%, due in July 2022	8,548		8,964
REG Grays Harbor term loan, variable interest of minimum of 3.5% or Prime Rate plus 0.25%, due in May 2022	8,521		8,828
REG Capital term loan, fixed interest rate of 3.99%, due in January 2028	7,121		7,185
REG Ralston term loan, variable interest rate of Prime Rate plus 2.25%, due in October 2025	18,035		18,948
Other	47		54
Total term debt before debt issuance costs	$	185,061	$	185,817

In addition, we had revolving debt (in thousands) as follows:

	March 31, 2019		December 31, 2018
Amount outstanding under lines of credit	$	102,612	$	14,250
Maximum available to be borrowed under lines of credit	$	58,348	$	114,889

A full description of our credit facilities and other agreements related to our outstanding indebtedness is included under the heading “Liquidity and Capital Resources” in our Annual Report on Form 10-K for the year ended December 31, 2018.

At March 31, 2019, there was outstanding $67.4 million aggregate principal amount of our 2.75% Convertible Senior Notes due June 15, 2019. In accordance with the indenture governing such Notes, we have elected to settle all conversions of each $1,000 principal amount of Notes being converted on or after October 23, 2018, with $1,000 in cash and any conversion value in excess of that amount in shares of our common stock.

Cash flows. The following table presents information regarding our cash flows and cash and cash equivalents for the three months ended March 31, 2019 and 2018 (in thousands):

	Three Months March 31,
	2019			2018
Cash used in operating activities	$	(105,925	)	$	(28,648	)
Cash provided by (used in) investing activities	25,314			(11,193		)
Cash provided by financing activities	80,199			31,325
Net change in cash, cash equivalents and restricted cash	(412		)	(8,516		)
Cash, cash equivalents and restricted cash end of period	$	126,062		$	69,290

In the first three months of 2019, we used $105.9 million of cash in operations, compared to $28.6 million of cash used in operations in the first three months of 2018. The increase in cash used in operations is largely driven by net loss of $43.4 million, compared to a net income of $214.4 million for the three months ended March 31, 2018. The net income for the quarter ended March 31, 2018 was primarily due to a net benefit of $204.9 million (after satisfaction of sharing arrangements) related to the reinstatement of the 2017 BTC, although payments of the 2017 BTC were not received until the second quarter of 2018. Cash flows used in operating activities were also impacted by a seasonal increase in inventories and accounts receivable of $52.0 million and $30.5 million, respectively. The net cash flows generated from investing activity in the first quarter of 2019 was primarily impacted by the maturities of marketable securities of $37.1 million, compared to no maturities in 2018, coupled

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with a decrease in cash paid for property, plant and equipment of $8.2 million, compared to $16.5 million in the first quarter of 2018. Cash flows from financing activities were impacted primarily by net borrowings on revolving lines of credit of $84.8 million for the first three months of 2019, compared to $40.5 million for the same period in 2018. Cash provided by financing activities in the 2018 period declined due to $7.8 million of share repurchases and $6.7 million of convertible debt repurchases compared to no share or convertible debt repurchases in 2019.

Capital expenditures. During the three months ended March 31, 2019, our capital expenditures were $8.2 million involving various plant optimization projects, the majority of which were at the New Boston, Seneca and Geismar facilities. During 2018, our capital expenditures were $46.5 million involving various projects, the majority of which were at the Madison, Ralston, Grays Harbor and Geismar facilities. Our budgeted capital expenditures for the remainder of 2019 are between $65.0 million and $75.0 million, which includes investments in plant optimization projects, environmental, health and safety projects and plant maintenance across a variety of facilities. This budgeted amount does not include potential investments under evaluation in a potential joint venture with Phillips 66 to construct a renewable diesel production facility in Washington state or in the possible expansion of production capacity at our renewable diesel facility in Geismar, Louisiana.

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements that have or are reasonably likely to have a current or future effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources that is material to investors.

Recent Accounting Pronouncements

For a discussion of new accounting pronouncements affecting the Company, refer to “Note 2 – Summary of Significant Accounting Policies” to our Condensed Consolidated Financial Statements.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The primary objectives of our investment activity are to preserve principal, provide liquidity and maximize income without significantly increasing risk. Some of the securities we invest in are subject to market risk. This means that a change in prevailing interest rates may cause the principal amount of the investment to fluctuate. To minimize this risk, we maintain a portfolio of cash equivalents in short-term investments in money market funds.

Commodity Price Risk

Over the period from January 2017 through March 31, 2019, average diesel prices based on Platts reported pricing for Group 3 (Midwest) have ranged from a high of approximately $2.47 per gallon reported in October 2018 to a low of approximately $1.31 per gallon in June 2017, with prices averaging $1.88 per gallon during this period. Over the period January 2017 to March 31, 2019, soybean oil prices (based on daily closing nearby futures prices on the Chicago Board of Trade for crude soybean oil) have ranged from a high of $0.36 per pound, or $2.69 per gallon of biodiesel, in January 2017, to a low of $0.27 per pound, or $2.02 per gallon, in November 2018, assuming 7.5 pounds of soybean oil yields one gallon of biodiesel with closing sales prices averaging $0.31 per pound, or $2.35 per gallon. Over the period from January 2017 through March 31, 2019, animal fat prices (based on prices from The Jacobsen Missouri River, for choice white grease) have ranged from a high of $0.28 per pound in September 2017 to a low of $0.16 per pound in March 2018, with sales prices averaging $0.22 per pound during this period. Over the period from January 2017 through March 31, 2019, RIN prices (based on prices from OPIS) have ranged from a high of $1.17 in August 2017 to a low of $0.31 in October 2018, with sales prices averaging $0.74 during this period.

Adverse fluctuations in feedstock prices as compared to biomass-based diesel prices result in lower profit margins and, therefore, represent unfavorable market conditions. The availability and price of feedstocks are subject to wide fluctuations due to unpredictable factors such as weather conditions during the growing season, rendering volumes, carry-over from the previous crop year and current crop year yield, governmental policies with respect to agriculture and supply and demand.

We have prepared a sensitivity analysis to estimate our exposure to market risk with respect to our sales contracts, lower-cost feedstock requirements, soybean oil requirements and the related exchange-traded contracts for the first three months of 2019. Market risk is estimated as the potential loss in fair value, resulting from a hypothetical 10% adverse change in the fair value of our lower-cost feedstock and soybean oil requirements and biomass-based diesel sales. The results of this analysis, which may differ from actual results, are as follows:

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	First three months of 2019 Volume (in millions)	Units	Hypothetical Adverse Change in Price		Impact on Annual Gross Profit (in millions)			Percentage Change in Gross Profit
Total Biodiesel	162.4	gallons	10	%	$	(43.0	)	(336.4	)%
Total Lower Cost Feedstocks	684.1	pounds	10	%	$	(17.8	)	(139.0	)%
Total Canola Oil	101.3	pounds	10	%	$	(3.3	)	(26.1	)%
Total Soy Oil	133.2	pounds	10	%	$	(4.0	)	(31.2	)%

We attempt to protect operating margins by entering into risk management contracts that reduce the risk of price volatility related to anticipated purchases of feedstocks, such as inedible animal fat and inedible corn oil and energy prices. We create offsetting positions by using a combination of forward physical purchases and sales contracts on feedstock and biomass-based diesel, including risk management futures contracts, swaps and options primarily on NYMEX NY Harbor ULSD and CBOT Soybean Oil; however, the extent to which we engage in risk management activities varies substantially from time to time, and from feedstock to feedstock, depending on market conditions and other factors. A 10% adverse change in the prices of NYMEX NY Harbor ULSD would have had a positive effect on the fair value of these instruments of $18.1 million at March 31, 2019. A 10% adverse change in the price of CBOT Soybean Oil would have had a positive effect of $2.1 million on the fair value of these instruments of at March 31, 2019.  A 10% adverse change in the price of NYMEX Natural Gas would have had an immaterial impact on our gross margin at March 31, 2019.

Interest Rate Risk

Our weighted average interest rate on variable rate debt balances for the three months ended March 31, 2019 was 4.47%. A hypothetical increase in interest rate of 10% would not have a material effect on our annual interest expenses or consolidated financial statements.

Inflation

To date, inflation has not significantly affected our operating results, though costs for petroleum-based diesel fuel, feedstocks, construction, labor, taxes, repairs, maintenance and insurance are all subject to inflationary pressures. Inflationary pressure in the future could affect our ability to sell the biomass-based diesel we produce, to maintain our production facilities adequately, to build new biomass-based diesel production facilities and to expand our existing facilities, as well as the demand for our facility construction management and operations management services.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Disclosure controls and procedures are designed to ensure that information required to be disclosed in the Company’s reports we file or submit under the Securities Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities Exchange Commission’s rules and forms, and that such information is accumulated and communicated to management, including our Chief Executive Officer ("CEO") and the Chief Financial Officer ("CFO"), as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives.

Our management, under the supervision of and with the participation of the CEO and CFO, performed an evaluation of the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15-d-15(e) under the Securities Exchange Act of 1934 (the "Exchange Act") as of the end of the period covered by this report, March 31, 2019. In connection with our evaluation of disclosure controls and procedures, we have concluded that our disclosure controls and procedures were effective as of March 31, 2019.

Management’s Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act). Management conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that our internal control over financial reporting was effective as of March 31, 2019. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Projections of any evaluation of

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effectiveness to future periods are subject to the risks that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Changes in Internal Control over Financial Reporting

There have been no changes during our quarter ended March 31, 2019 in our internal control over financial reporting (as defined in Rules 13a-15(f) under the Exchange Act) that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Neither the Company nor any of its subsidiaries are a party to any material pending legal or governmental proceeding, nor is any of our property the subject of any material pending legal or governmental proceeding, except ordinary routine legal or governmental proceedings arising in the ordinary course of our business and incidental to our business, none of which is expected to have a material adverse impact upon our business, financial position or results of operations.

ITEM 1A. Risk Factors

Our business, financial condition, results of operations and liquidity are subject to various risks and uncertainties, including those described below. As a result, the trading price of our common stock could decline.

RISKS RELATED TO FEDERAL AND STATE INCENTIVES

The Renewable Fuel Standard Program, a Federal law mandating the consumption of qualifying biofuels, could be repealed, curtailed or otherwise changed, which might have a material adverse effect on our revenues, operating margins and financial condition.

We and other participants in the biomass-based diesel industry rely on governmental programs requiring or incentivizing the consumption of biofuels. Biomass-based diesel has historically been more expensive to produce than petroleum-based diesel fuel and these governmental programs support a market for biomass-based diesel that might not otherwise exist.

One of the most important of these programs is the Renewable Fuel Standard ("RFS2"), a Federal law which requires that transportation fuels in the United States contain a minimum amount of renewable fuel. This program is administered by the Environmental Protection Agency ("EPA"). The EPA's authority includes setting annual minimum aggregate levels of consumption in four renewable fuel categories, including the two primary categories in which our fuel competes (biomass-based diesel and advanced biofuel). The parties obligated to comply with this renewable volume obligation ("RVO"), are petroleum refiners and petroleum fuel importers.

The petroleum industry is strongly opposed to the RFS2 and can be expected to continue to press for changes both in the RFS2 itself and in the way that it is administered by the EPA. One key point of contention is the rate of growth in the annual RVO. The RVO for biomass-based diesel was set at steadily rising levels beginning at 1.0 billion gallons in 2012 and increasing to 2.00 billion gallons in 2017. However, growth in the RVO was constrained from 2017 through 2019, as the biomass-based diesel RVO increased by only 100,000 gallons from 2.00 billion to 2.10 billion gallons while the advanced biofuel RVO increased from 4.28 billion gallons to 4.92 billion gallons. For 2020, the EPA set the biomass-based diesel RVO at 2.43 billion gallons. The 2020 advanced biofuel RVO will be established later this year. We believe that growth in the annual RVOs strongly influences our ability to grow our business and supports the price of our fuel through the RINs. The EPA's future decisions regarding the RVO will significantly influence our revenues and profit margins.

The RFS2 also grants to the EPA authority to grant small refiner waivers, waiving a qualifying refiner's obligation based on a determination that the program is causing severe economic harm to that refinery. The table below summarizes the small refiner waiver petitions requested, granted, denied or pending and the impacted volumes according to the EPA:

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	2018		2017		2016		2015
Petitions received	40		37		20		14
Petitions granted	—		35		19		7
Petitions denied or withdrawn	—		1		—		7
Petitions pending	40		1		1		—
Estimated volume of fuel exempted (million gallons)	—		17,050		7,841		3,070
Estimated RVO Exempted (million RINs)	—		404		157		49
Estimated RVO Exempted (% of Advanced biofuels RVOs)	—	%	9.4	%	4.3	%	1.7	%

We believe that these exemptions, in addition to other factors such as a relatively strong HOBO spread, impacted the demand for and price of RINs as the average price of D4 RINs fell from $0.82 to $0.55 during 2018 and from $0.55 to $0.38 during the first quarter of 2019 according to OPIS data. If the EPA continues this practice, it will harm demand for and the price of RINs and thus our profitability.

The United States Congress could repeal, curtail or otherwise change the RFS2 program in a manner adverse to us. Similarly, the EPA could curtail or otherwise change its administration of the RFS2 program in a manner adverse to us, including by not increasing or even decreasing the RVO, by waiving compliance with the RVO or otherwise. In addition, while Congress specified RFS2 volume requirements through 2022 (subject to adjustment in the rulemaking process), beginning in 2023 required volumes of renewable fuel will be largely at the discretion of the EPA (in coordination with the Secretary of Energy and Secretary of Agriculture). We cannot predict what changes, if any, will be instituted or the impact of any changes on our business, although adverse changes could seriously harm our revenues, earnings and financial condition.

Loss of or reductions in Federal and State Government tax incentives for biomass-based diesel production or consumption may have a material adverse effect on our revenues and operating margins.

Federal and State Government tax incentives have assisted the biomass-based diesel industry by making the price of biomass-based diesel more cost competitive with the price of petroleum-based diesel fuel to the end user.

Federal Tax Incentives

The most significant tax incentive program has been the federal biodiesel mixture excise tax credit, referred to as the Biodiesel Tax Credit ("BTC"). Under the BTC, the first person to blend pure biomass-based diesel with petroleum-based diesel fuel receives a $1.00-per-gallon refundable tax credit.

The BTC was established on January 1, 2005 and has lapsed and been reinstated retroactively and prospectively several times. Most recently in February 2018, the BTC was retroactively reinstated for 2017, but was not reinstated for any subsequent periods. As a result, the BTC has not been in effect since January 1, 2018. As was the case in previous periods when the BTC was not in effect, we and many other biomass-based diesel industry producers have adopted contractual arrangements with customers and vendors specifying the allocation and sharing of any retroactively reinstated incentive. Whether the BTC will be reinstated for 2018, 2019 or future years will have a very significant impact on our results of operations and financial condition. Reinstatement of the BTC for 2017 resulted in a $205 million net benefit (after satisfaction of sharing arrangements) to our net income in the first quarter of 2018 and to our Adjusted EBITDA for 2017. We estimate that if the BTC is reinstated for 2019 and 2018 on the same terms as in 2017, the net benefits to our Adjusted EBITDA for business conducted in the three months ended March 31, 2019 and for the year ended December 31, 2018, would be approximately $55 and $237 million, respectively.

Unlike the RFS2 program, the BTC has a direct effect on Federal Government spending and changes in federal budget policy could result in its elimination or in changes to its terms that are less beneficial to us. We cannot predict what action, if any, Congress may take with respect to the BTC. There is no assurance that the BTC will be reinstated, that it will be reinstated on the same terms or, if reinstated, that its application will be retroactive, prospective or both. Due to the significance of this program to our business, adverse changes in the BTC can be expected to seriously harm our results of operations and financial condition.

State Tax Incentives

Several states have enacted tax incentives for the use of biodiesel. For example, Illinois has a generally applicable 6.25% sales tax, but offers an exemption from this tax for a blend of fuel that consists of 11% biodiesel ("B11"). In Iowa, for 2018 through 2024, retailers earn $0.035 per gallon of B5 - B10 and $0.055 per gallon for B11 and above. Iowa also has a biomass-based diesel production incentive that provides $0.02 per gallon of production capped after the first 25 million gallons per

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production plant. The biodiesel and renewable diesel portion of fuel blends are exempt from Texas state excise tax, which results in a $0.20 per gallon incentive for B100. Minnesota law requires a B5 biodiesel blend except during the summer months when a B20 blend is required. State budget or other considerations could cause the modification or elimination of tax incentive programs. The curtailment or elimination of such incentives could materially and adversely affect our revenues and profitability.

We derive a significant portion of our revenues from sales of our renewable fuel in the State of California primarily as a result of California’s Low Carbon Fuel Standard; adverse changes in this law or reductions in the value of LCFS credits would harm our revenues and profits.

We estimate that our revenues from the sale of renewable fuel in California and from sales of credits received under California's Low Carbon Fuel Standard ("LCFS") were approximately $146.8 million in the first three months of 2019. The LCFS is designed to reduce greenhouse gas emissions associated with transportation fuels used in California by ensuring that the total amount of fuel consumed meets declining targets for such emissions. The regulation quantifies lifecycle greenhouse gas emissions by assigning a “carbon intensity” ("CI") score to each transportation fuel based on that fuel’s lifecycle assessment. Each petroleum fuel provider, generally the fuel’s producer or importer is required to ensure that the overall CI score for its fuel pool meets the annual carbon intensity target for a given year. This obligation is tracked through credits and deficits and credits can be traded. We receive LCFS credits when we sell qualified fuels in California. As a result of the trading price of LCFS credits, California has become a desirable market in which to sell our renewable fuel. In 2018, LCFS credit prices increased from $116 per credit on January 2, 2018 to $195 per credit on December 31, 2018. In the first quarter of 2019, LCFS credit prices were in the range of $189 to $197 per credit. As a result, an increasing percentage of our revenue and profit is related to sales to California and LCFS credit values. If the value of LCFS credits were to materially decrease as a result of greater supply or reduced demand for LCFS credits, if the fuel we produce is deemed not to qualify for LCFS credits or if the LCFS or the manner in which it is administered or applied were otherwise changed in a manner adverse to us, our revenues and profits could be seriously harmed.

RISKS RELATED TO OUR BUSINESS OPERATIONS AND THE MARKETS IN WHICH WE OPERATE

Increased industry-wide production of biodiesel as a result of potential utilization of existing excess production capacity, announced large plant expansions of renewable diesel and potential co-processing of renewable diesel by petroleum refiners, could reduce prices for our fuel and increase the cost of feedstocks used to produce them, which would seriously harm our revenues and results of operations.

If additional volumes of advanced biofuel RIN production come online and the EPA does not increase the RVO in accordance with the increased production, the volume of advanced biofuel RINs generated could exceed the volume required under the RFS2.  In the event this occurs, biomass-based diesel and advanced biofuel RIN prices would be expected to decrease, potentially significantly, harming demand for our products and our profitability.

According to the National Biodiesel Board ("NBB"), in 2017, 4.1 billion gallons per year of biomass-based diesel production capacity in the United States was registered under the RFS2 program by NBB members. In addition to this amount, several hundred million more gallons of U.S. based biomass-based diesel production capacity was registered by non-NBB members and another 4.5 billion gallons of biomass-based diesel production was registered by foreign producers. These amounts far exceed both historic consumption of biomass-based diesel in the United States and required consumption under the RFS2.

Additionally, several leading biomass-based diesel companies have announced their intention to expand their production of renewable diesel for the U.S. market. World Energy has announced that it will expand capacity at its Los Angeles area biorefinery from its existing 45 mmgy to over 300 mmgy. Diamond Green Diesel, the largest U.S. producer of renewable diesel, has announced plans to expand its 275 million mmgy capacity by 400 mmgy. Neste, the largest global producer of renewable diesel, announced in December 2018 a 440 mmgy expansion of its Singapore facility that exports a significant portion of its production to the U.S.West Coast.

Further, due to the economic incentives available, several petroleum refiners have started or may soon start to produce co-processed renewable diesel, or CPRD. CPRD uses the same feedstocks we use to produce biomass-based diesel and it generates an advanced biofuel RIN. CPRD may be more cost-effective to produce than biomass-based diesel, particularly biodiesel.

If production of competitive advanced renewable fuels increases significantly as a result of utilization of existing excess production capacity or new capacity as described above, competition for a relatively fixed supply of feedstocks would increase significantly, harming our margins. Furthermore if supply of advanced renewable fuels exceeds demand, prices for our

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renewable fuel and for RINs and other credits may decrease significantly, harming our profitability and potentially forcing us to idle our facilities.

Our gross margins are dependent on the spread between biomass-based diesel prices and feedstock costs, each of which are volatile and can cause our results of operations to fluctuate substantially.

Biomass-based diesel has traditionally been marketed primarily as an additive or alternative to petroleum-based diesel fuel, and, as a result, biomass-based diesel prices have been heavily influenced by the price of petroleum-based diesel fuel, adjusted for government incentives supporting renewable fuels, more so than biomass-based diesel production costs. The absence of a close correlation between production costs and biomass-based diesel prices means that we may be unable to pass increased production costs on to our customers in the form of higher prices. If there is a decrease in the spread between biomass-based diesel prices and feedstock costs, whether as a result of an increase in feedstock prices or as a result of a reduction in biomass-based diesel and credit prices, our gross margins, cash flow and results of operations would be adversely affected.

Energy prices, particularly the market price for crude oil, are volatile. The NYMEX ULSD prices ranged from a low of $1.70 per gallon to a high of $2.04 per gallon in the first quarter of 2019. Petroleum prices are volatile due to global factors, such as the impact of wars, political uprisings, new extraction technologies and techniques, OPEC production quotas, worldwide economic conditions, changes in refining capacity and natural disasters.

In addition, an element of the price of biomass-based diesel that we produce is the value of the associated credits, including RINs. RIN prices in the biomass-based diesel category as reported by OPIS fluctuated in the first quarter of 2019, ranging from $0.53 to $0.87 per RIN, while in 2018, RIN prices ranged from $0.47 to $1.36 per RIN. For years there has been significant volatility in RIN prices. Reductions in RIN values, such as those experienced in prior years, may have a material adverse effect on our revenues and profits as they directly reduce the value we are able to capture for our biomass-based diesel.

A decrease in the availability or an increase in the price, of feedstocks may have a material adverse effect on our financial condition and operating results. The price and availability of feedstocks and other raw materials may be influenced by general economic, market and regulatory factors. These factors include weather conditions, farming decisions, government policies and subsidies with respect to agriculture and international trade and global supply and demand. During periods when the BTC has lapsed, biomass-based diesel producers may elect to continue purchasing feedstock and producing biomass-based diesel at negative margins under the assumption the BTC will be retroactively reinstated, and consequently, the price of feedstocks may not decrease to a level proportionate to current operating margins. Increasing production of biomass-based diesel and, particularly recent and prospective expansion of renewable diesel capacity, and the development of alternative fuels and renewable chemicals also puts pressure on feedstock supply and availability to the biomass-based diesel industry. The biomass-based diesel industry may have difficulty in procuring feedstocks at economical prices if competition for biomass-based diesel feedstocks increases due to newly added renewable diesel capacity.

Historically, the spread between biomass-based diesel prices and feedstock costs has varied significantly. Although actual yields vary depending on the feedstock quality, the average monthly spread between the price per gallon of 100% pure biodiesel ("B100") as reported by The Jacobsen Publishing Company, and the price per gallon for the amount of choice white grease necessary to produce one gallon of B100 was $1.20 in 2017, $1.38 in 2018 and $1.15 in the first quarter of 2019, assuming eight pounds of choice white grease yields one gallon of biomass-based diesel. The average monthly spread for the amount of crude soybean oil required to produce one gallon of B100, based on the nearby futures contract as reported on the Chicago Board of Trade, was $0.64 in 2017, $0.76 in 2018 and $0.60 in the first quarter of 2019, assuming 7.5 pounds of soybean oil yields one gallon of biomass-based diesel. For each year from 2016 to 2018, approximately 72%, 73% and 77%, respectively, of our annual total feedstock usage was inedible corn oil, used cooking oil or inedible animal fat, and approximately 28%, 27% and 23%, respectively, was virgin vegetable oils. When the spread between biomass-based diesel prices and feedstock prices narrows, our profitability will be harmed.

Risk management transactions could significantly increase our operating costs and may not be effective.

In an attempt to partially offset the effects of volatile feedstock costs and biomass-based diesel fuel prices, we enter into contracts that establish market positions in feedstocks, such as inedible corn oil, used cooking oil, inedible animal fats and soybean oil, along with related commodities, such as heating oil and ultra-low sulfur diesel ("ULSD"). The financial impact of such market positions depends on commodity prices at the time that we are required to perform our obligations under these contracts as well as the cumulative sum of the obligations we assume under these contracts.

Risk management activities can themselves result in losses when a position is purchased in a declining market or a position is sold in a rising market. Risk management arrangements expose us to the risk of financial loss in situations where the counterparty defaults on its contract or, in the case of exchange-traded or over-the-counter futures or options contracts, where there is a change in the expected differential between the underlying price in the contract and the actual prices paid or received by us. Changes in the value of these futures instruments are recognized in current income and may result in margin

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calls. We had risk management losses of $22.7 million from our derivative financial instrument trading activity for the quarter ended March 31, 2019, compared to risk management losses of $2.4 million for the quarter ended March 31, 2018. At March 31, 2019, the net notional volumes of NY Harbor ULSD, CBOT Soybean Oil and NYMEX Natural Gas covered under the open risk management contracts were approximately 92 million gallons, 76 million pounds and 2 million million British thermal units, respectively. A 10% positive change in the prices of NYMEX NY Harbor ULSD would have a negative effect of $18.1 million on the fair value of these instruments at March 31, 2019. A 10% positive change in the price of CBOT Soybean Oil would have had a negative effect of $2.1 million on the fair value of these instruments at March 31, 2019. If these adverse changes in derivative instrument fair value were to occur in larger magnitude or simultaneously, a significant amount of liquidity would be needed to fund margin calls.  In addition, we may also vary the amount of risk management strategies we undertake, or we may choose not to engage in risk management transactions at all.  Our results of operation may be negatively impacted if we are not able to manage our risk management strategy effectively.

One customer accounted for a meaningful percentage of revenues and a loss of this customer could have an adverse impact on our total revenues.

One customer, Pilot Travel Centers LLC, ("Pilot"), the largest operator of travel centers in North America, accounted for 7%, 9% and 8% of our revenues in the first three months of 2019, and the full years of 2018, and 2017, respectively. Our revenues from Pilot generally do not include the RINs or LCFS credits associated with the gallons of biomass-based diesel sold to Pilot. The value of those RINs and LCFS credits represented approximately an additional 1%, 2% and 9% of our total sales in the first three months of 2019, and the full years of 2018 and 2017, respectively, based on the OPIS average RIN and LCFS price for these periods. In the event we lose Pilot as a customer or Pilot significantly reduces the volume of biomass-based diesel purchased from us, it could be difficult to replace the lost revenues, and our profitability and cash flow could be materially harmed. We do not have a long-term contract with Pilot that ensures a continuing level of business from Pilot.

Our facilities and our customers' facilities are subject to risks associated with fire, explosions, leaks, and natural disasters, which may disrupt our business and increase costs and liabilities.

Because biomass-based diesel and some of its inputs and outputs are combustible and/or flammable, a leak, fire or explosion may occur at a plant or customer’s facility which could result in damage to the plant and nearby properties, injury to employees and others, and interruption of operations. For example, we experienced fires at our Geismar facility in April 2015 and again in September 2015 and there was a fire at our Madison facility in June 2017. As a result of these fires, people were injured and the affected facilities were shut down for lengthy periods while repairs and upgrades were completed.

The operations at our facilities are also subject to the risk of natural disasters. Our Houston and Geismar facilities, due to their Gulf Coast locations, are vulnerable to hurricanes and flooding, which may cause plant damage, injury to employees and others and interruption of operations. For example, in August 2016 we experienced reduced operating days at our Geismar facility as a result of local area flooding and reduced operating days at our Houston facility as a result of Hurricane Harvey in August 2017. A majority of our facilities are located in the Midwest, and are subject to tornado activity. In addition, California has become one of our largest markets, serviced by our Geismar and Midwest facilities. An earthquake or other natural disaster could disrupt our ability to transport, store and deliver products to the California market.

If we experience a fire or other serious incident at our facilities or if any of our facilities is affected by a natural disaster, we may incur significant additional costs including, among other things, loss of profits due to unplanned temporary or permanent shutdowns of our facilities, or the means of transporting our products, cleanup costs, liability for damages or injuries, legal expenses and reconstruction expenses, which would harm our results of operations and financial condition.

In addition to biodiesel and renewable diesel, we store and transport petroleum-based motor fuels.  The dangers inherent in the storage and transportation of fuels could cause disruptions in our operations and could expose us to potentially significant losses, costs or liabilities.

We store fuel in aboveground storage tanks and transport fuel in our own trucks as well as with third-party carriers. Our operations are subject to significant hazards and risks inherent in transporting and storing fuel. These hazards and risks include, but are not limited to, traffic accidents, fires, explosions, spills, discharges, and other releases, any of which could result in distribution difficulties and disruptions, environmental pollution, governmentally-imposed fines or clean-up obligations, personal injury or wrongful death claims, and other damage to our properties and the properties of others. Any such event not covered by our insurance could have a material adverse effect on our business, financial condition and results of operations.

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Our insurance may not protect us against our business and operating risks.

We maintain insurance for some, but not all, of the potential risks and liabilities associated with our business. For some risks, we may not obtain insurance if we believe the cost of available insurance is excessive relative to the risks presented. As a result of market conditions, premiums and deductibles for certain insurance policies can increase substantially and, in some instances, certain insurance policies may become unavailable or available only for reduced amounts of coverage. As a result, we may not be able to renew our existing insurance policies or procure other desirable insurance on commercially reasonable terms, if at all. Although we intend to maintain insurance at levels we believe are appropriate for our business and consistent with industry practice, we will not be fully insured against all risks. In addition, pollution, environmental risks and the risk of natural disasters generally are not fully insurable. Losses and liabilities from uninsured and underinsured events and delay in the payment of insurance proceeds could have a material adverse effect on our financial condition and results of operations.

We operate in a highly competitive industry and competition in our industry would increase if new participants enter the biomass-based diesel or advanced biofuels business.

We operate in a very competitive environment. The biomass-based diesel industry primarily comprises smaller entities that engage exclusively in biodiesel production, large integrated agribusiness companies that produce biodiesel along with their soybean crush businesses and increasingly, integrated petroleum companies producing renewable diesel. We face competition for capital, labor, feedstocks and other resources from these companies. In the United States, we compete with soybean processors and refiners, including Archer-Daniels-Midland Company, Cargill, and Louis Dreyfus Commodities. In addition, petroleum refiners are increasingly entering into renewable diesel production. Such petroleum refiners include Neste Corporation with approximately 882 mmgy of global renewable diesel production capacity in Asia and Europe, and Valero Energy Corporation through its Diamond Green Diesel joint venture that operates an approximate 275 mmgy capacity renewable diesel facility in Norco, Louisiana that is in the process of being expanded by 400 mmgy. In addition, petroleum refiners such as Sinclair, British Petroleum and Marathon Petroleum Corporation have announced that they have begun co-processing renewable diesel at certain of their refineries. All of these named competitors have greater financial resources than we do and may be able to produce biomass-based diesel at a lower cost than we do due to their integrated operations or greater refining capacity.

Petroleum companies and diesel retailers form the primary distribution networks for marketing biomass-based diesel through blended petroleum-based diesel. If these companies increase their direct or indirect biomass-based diesel production, including in the form of co-processing, there will be less need to purchase biomass-based diesel from independent biomass-based diesel producers like us. Such a shift in the market would materially harm our operations, cash flows and financial position.

We derive a substantial portion of our profitability from the production of renewable diesel at our plant located in Geismar, Louisiana and any interruption in our operations at this facility would have a material adverse effect on our results of operations and financial conditions.

Renewable diesel carries a premium price to biodiesel as a result of a variety of factors including the ability to blend it with petroleum diesel seamlessly, better cold weather performance, and because it generates more RINs on a per gallon basis. We estimated that our renewable diesel production facility in Geismar, Louisiana generated more than half of our adjusted EBITDA in 2018. We experienced two fires at this facility in 2015 that each resulted in the plant being shut down for a lengthy period. If production at this facility were interrupted again due to a fire or for any other reason, it would have a disproportionately significant and material adverse impact on our results of operations and financial condition.

Technological advances and changes in production methods in the biomass-based diesel industry and renewable chemical industry could render our plants obsolete and adversely affect our ability to compete.

It is expected that technological advances in biomass-based diesel production methods will continue to occur and new technologies for biomass-based diesel production may develop. Advances in the process of converting oils and fats into biodiesel and renewable diesel, including CPRD, could allow our competitors to produce biomass-based diesel faster and more efficiently and at a substantially lower cost. In addition, we currently produce biomass-based diesel to conform to or exceed standards established by the American Society for Testing and Materials ("ASTM"). ASTM standards for biomass-based diesel and biomass-based diesel blends may be modified in response to new technologies from the industries involved with diesel fuel.

New standards or production technologies may require us to make additional capital investments in, or modify, plant operations to meet these standards. If we are unable to adapt or incorporate technological advances into our operations, our production facilities could become less competitive or obsolete. Further, it may be necessary for us to make significant expenditures to acquire any new technology, acquire licenses or other rights to technology and retrofit our plants in order to

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incorporate new technologies and remain competitive.There is no assurance that we will be able to obtain such technologies, licenses or rights on favorable terms. If we are unable to obtain, implement or finance new technologies, our production facilities could be less efficient than our competitors, and our ability to produce biomass-based diesel on a competitive level may be harmed, negatively impacting our revenues and profitability.

Our intellectual property is integral to our business. If we are unable to protect our intellectual property, or others assert that our operations violate their intellectual property, our business could be adversely affected.

Our success depends in part upon our ability to protect and prevent others from using our intellectual property. Failure to obtain or maintain adequate intellectual property protection could adversely affect our competitive business position. We rely on a combination of intellectual property rights, including patents, copyrights, trademarks and trade secrets in the United States and in select foreign countries. Effective patent, copyright, trademark and trade secret protection may be unavailable, limited or not applied for in some countries.

We rely in part on trade secret protection to protect our confidential and proprietary information and processes. However, trade secrets are difficult to protect. We have taken measures to protect our trade secrets and proprietary information, but these measures may not be effective. For example, we require new employees and consultants to execute confidentiality agreements upon the commencement of their employment or consulting arrangement with us. These agreements generally require that all confidential information developed by the individual or made known to the individual by us during the course of the individual’s relationship with us be kept confidential and not disclosed to third parties. These agreements also generally provide that knowhow and inventions conceived by the individual in the course of rendering services to us are our exclusive property. Nevertheless, these agreements may be breached, or may not be enforceable, and our proprietary information may be disclosed. Despite the existence of these agreements, third parties may independently develop substantially equivalent proprietary information and techniques.

It may be difficult for us to protect and enforce our intellectual property. Costly and time-consuming litigation could be necessary to enforce and determine the scope of our proprietary rights. If we pursue litigation to assert our intellectual property rights, an adverse judicial decision in any legal action could limit our ability to assert our intellectual property rights, limit our ability to develop new products, limit the value of our technology or otherwise negatively impact our business, financial condition and results of operations.

A competitor could seek to enforce intellectual property claims against us. Defending intellectual property rights claims asserted against us, regardless of merit, could be time-consuming, expensive to litigate or settle, divert management resources and attention and force us to acquire intellectual property rights and licenses, which may involve substantial royalty payments. Further, a party making such a claim, if successful, could secure a judgment that requires us to pay substantial damages.

Increases in our transportation costs or disruptions in our transportation services could have a material adverse effect on our business.

Our business depends on transportation services to deliver raw materials to us and finished products to our customers. The costs of these transportation services are affected by the volatility in fuel prices or other factors. For example, from January 2016 to mid-2018, diesel prices increased from just over one dollar per gallon to over two dollars per gallon for the second and third quarters of 2018 and ending the year around one dollar and fifty cents per gallon. During the first quarter of 2019, diesel prices were just below two dollars per gallon.

Changes in fuel prices, and thus changes in our transportation costs, can be drastic and unpredictable. Our transportation costs are also affected by U.S. oil production in the Bakkens, which has had a significant impact on tank car availability and prices. If oil production from this area increases, the demand for rail cars will rise and will significantly increase rail car prices. We have not been able in the past, and may not be able in the future, to pass along part or all of any of these price increases to customers.

If we continue to be unable to increase our prices as a result of increased fuel costs charged to us by transportation providers, our gross margins may be materially adversely affected. If any transportation providers fail to deliver raw materials to us in a timely manner, we may be unable to manufacture products on a timely basis. Shipments of products and raw materials may be delayed due to weather conditions, strikes or other events. Any failure of a third-party transportation provider to deliver raw materials or products in a timely manner could harm our reputation, negatively affect our customer relationships and have a material adverse effect on our business, financial condition and results of operations.

We are dependent upon our key management personnel and other personnel whereby the loss of any of these persons could adversely affect our results of operations.

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Our success depends on the abilities, expertise, judgment, discretion, integrity and good faith of our management and employees to manage the business and respond to economic, market and other conditions. We are highly dependent upon key members of our relatively small management team and employee base that possess unique technical skills for the execution of our business plan. There can be no assurance that any individual will continue in his or her capacity for any particular period of time or that replacement personnel with comparable skills could be found. The inability to retain our management team and employee base or attract suitably qualified replacements and additional staff could adversely affect our business. The loss of employees could delay or prevent the achievement of our business objectives and have a material adverse effect upon our results of operations and financial position.

We may encounter difficulties in effectively integrating the businesses we acquire, including our international businesses where we have limited operating history.

We may face significant challenges in effectively integrating entities and businesses that we acquire, and we may not realize the benefits anticipated from such acquisitions.  Achieving the anticipated benefits of our acquired businesses will depend in part upon whether we can integrate our businesses in an efficient and effective manner.  Our integration of acquired businesses involves a number of risks, including:

• difficulty in integrating the operations and personnel of the acquired company;

• difficulty in effectively integrating the acquired technologies, products or services with our current technologies, products or services;

• demands on management related to the increase in our size after the acquisition;

• the diversion of management’s attention from daily operations to the integration of acquired businesses and personnel;

• failure to achieve expected synergies and costs savings;

• difficulties in the assimilation and retention of employees;

• difficulties in the assimilation of different cultures and practices, as well as in the assimilation of broad and geographically dispersed personnel and operations;

• difficulties in the integration of departments, systems, including accounting systems, technologies, books and records and procedures, as well as in maintaining uniform standards and controls, including internal control over financial reporting, and related procedures and policies;

• incurring acquisition-related costs or amortization costs for acquired intangible assets that could impact our operating results;

• the need to fund significant working capital requirements of any acquired production facilities;

• potential failure of the due diligence processes to identify significant problems, liabilities or other shortcomings or challenges of an acquired company or technology, including but not limited to, issues with the acquired company’s intellectual property, product quality, environmental liabilities, data back-up and security, revenue recognition or other accounting practices, employee, customer or partner issues or legal and financial contingencies;

• exposure to litigation or other claims in connection with, or inheritance of claims or litigation risk as a result of, an acquisition, including but not limited to, claims from terminated employees, customers, former stockholders or other third parties; and

• incurring significant exit charges if products or services acquired in business combinations are unsuccessful.

Our ability to recognize the benefit of our acquisition of two biodiesel production facilities in Germany and associated business operations, or any other international operations we may invest in the future, will require the attention of management and is subject to a number of risks. Our experience operating a biorefinery and other business operations outside of the United States is limited. In addition, while the biodiesel market in Europe benefits from regulations that encourage the use of biodiesel, these regulations are subject to political and public opinion and may be changed. In addition, expanding our operations internationally subjects us to the following risks:

• recruiting and retaining talented and capable management and employees in foreign countries;

• challenges caused by distance, language and cultural differences;

• protecting and enforcing our intellectual property rights;

• difficulties in the assimilation and retention of employees;

• the inability to extend proprietary rights in our technology into new jurisdictions;

• currency exchange rate fluctuations;

• general economic and political conditions in foreign jurisdictions;

• foreign tax consequences;

• foreign exchange controls or U.S. tax laws in respect of repatriating income earned in countries outside the United States;

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• compliance with the U.S.'s Foreign Corrupt Practices Act and other similar anti-bribery and anti-corruption regulations;

• political, economic and social instability;

• higher costs associated with doing business internationally; and

• export or import regulations as well as trade and tariff restrictions.

Our failure to successfully manage and integrate our acquisitions could have an adverse effect on our operating results, ability to recognize international revenue, and our overall financial condition.

We incur significant expenses to maintain and upgrade our operating equipment and plants, and any interruption in the operation of our facilities may harm our operating performance.

We regularly incur significant expenses to maintain and upgrade our equipment and facilities. The machines and equipment that we use to produce our products are complex, have many parts and some are run on a continuous basis. We must perform routine maintenance on our equipment and will have to periodically replace a variety of parts such as motors, pumps, pipes and electrical parts. In addition, our facilities require periodic shutdowns to perform major maintenance and upgrades. These scheduled shutdowns of facilities result in decreased sales and increased costs in the periods in which a shutdown occurs and could result in unexpected operational issues in future periods as a result of changes to equipment and operational and mechanical processes made during the shutdown period.

Growth in the sale and distribution of biodiesel is dependent on the expansion of related infrastructure which may not occur on a timely basis, if at all, and our operations could be adversely affected by infrastructure limitations or disruptions.

While renewable diesel has the same chemical composition as petroleum diesel and can utilize the same distribution infrastructure, biodiesel has a different chemical composition and may require separate or additional infrastructure. Growth in the biodiesel market depends on continued development of infrastructure for the distribution of biodiesel. Substantial investment required for these infrastructure changes and expansions may not be made on a timely basis or at all. The scope and timing of any infrastructure expansion are often beyond our control. Also, we compete with other biofuel companies for access to some of the key infrastructure components such as pipeline, terminal and underground storage tank capacity. As a result, increased production of biodiesel will increase the demand and competition for necessary infrastructure. Any delay or failure in expanding distribution infrastructure could hurt the demand for or prices of biodiesel, impede delivery of our biodiesel, and impose additional costs, each of which would have a material adverse effect on our results of operations and financial condition. Our business will be dependent on the continuing availability of infrastructure for the distribution of increasing volumes of biodiesel and any infrastructure disruptions could materially harm our business.

Our business is subject to seasonal changes based on regulatory factors and weather conditions and this seasonality could cause our revenues and operating results to fluctuate.

Our operating results are influenced by seasonal fluctuations in the price of and demand for biomass-based diesel. Seasonal fluctuations may be based on both the weather and the status of both the BTC and RVO.

Demand for our biomass-based diesel may be higher in the quarters leading up to the expiration of the BTC as customers seek to purchase biomass-based diesel when they can benefit from the agreed upon value sharing of the BTC with producers. This higher demand prompted by an expiring BTC has often resulted in reduced demand for biodiesel in the following quarter. In addition, RIN prices may also be subject to seasonal fluctuations. The RIN is dated for the calendar year in which it is generated. Since 20% of an Obligated Party's annual RVO can be satisfied by prior year RINs, most RINs must come from biofuel produced or imported during the RVO year. As a result, RIN prices can be expected to increase as the calendar year progresses if the RIN market is undersupplied compared to that year's RVO and decrease if it is oversupplied.

Weather also impacts our business because biodiesel typically has a higher cloud point than petroleum-based or renewable diesel. The cloud point is the temperature below which a fuel exhibits a noticeable cloudiness and eventually gels, leading to fuel handling and performance problems for customers and suppliers. Reduced demand in the winter for our higher cloud point biodiesel may result in excess supply of such higher cloud point biodiesel and lower prices for such higher cloud point biodiesel. Most of our production facilities are located in colder Midwestern states and our costs of shipping biodiesel to warmer climates generally increase in cold weather months.

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The tendency of biodiesel to gel in colder weather may also result in long-term storage problems. In cold climates, fuel may need to be stored in a heated building or heated storage tanks, which result in higher storage costs. Higher cloud point biodiesel may have other performance problems, including the possibility of particulate formation above the cloud point which may result in increased expenses as we try to remedy these performance problems, including the costs of extra cold weather treatment additives. Remedying these performance problems may result in decreased yields, lower process throughput or both, as well as substantial capital costs. Any reduction in the demand for our biodiesel product, or the production capacity of our facilities will reduce our revenues and have an adverse effect on our cash flows and results of operations.

Failure to comply with governmental regulations, including EPA requirements relating to RFS2, could result in the imposition of penalties, fines, or restrictions on our operations and remedial liabilities.

The biomass-based diesel industry is subject to extensive federal, state and local laws and regulations. Under certain environmental laws and regulations, we could be held strictly liable for the removal or remediation of previously released materials or property contamination regardless of whether we were responsible for the release or contamination, and regardless of whether current or prior operations were conducted consistent with the accepted standards of practice. Many of our assets and plants were acquired from third parties and we may incur costs to remediate property contamination caused by previous owners. Compliance with these laws, regulations and obligations could require substantial capital expenditures. Failure to comply could result in the imposition of penalties, fines or restrictions on operations and remedial liabilities.

Changes in environmental laws and regulations occur frequently, and any changes that result in more stringent or costly waste handling, storage, transport, disposal or cleanup requirements could require us to make significant expenditures to attain and maintain compliance and may otherwise have a material adverse effect on our business in general and on our results of operations, competitive position or financial condition. We are unable to predict the effect of additional environmental laws and regulations which may be adopted in the future, including whether any such laws or regulations would significantly increase our cost of doing business or affect our operations in any area.

We are subject to various laws and regulations related to RFS2, most significantly regulations related to the generation and dissemination of RINs. These regulations are highly complex and continuously evolving, requiring us to periodically update our compliance systems. In 2014, the EPA issued a final rule to establish a quality assurance program and the EPA also implemented regulations related to the generation and sale of biomass-based diesel RINs. Compliance with these or any new regulations or Obligated Party verification procedures could require significant expenditures to attain and maintain compliance. Any violation of these regulations by us, could result in significant fines and harm our customers’ confidence in the RINs we issue, either of which could have a material adverse effect on our business.

Renewable diesel fuel is superior to biodiesel in certain respects and if renewable diesel production capacity increases to a sufficient extent, it could largely supplant biodiesel as the renewable fuel of choice; we may not be successful in expanding our renewable diesel production capacity.

Renewable diesel is not as widely available as biodiesel, but it has certain characteristics that favorably distinguish it from traditional biodiesel and as a result renewable diesel carries a price premium compared to biodiesel. For example, renewable diesel has very similar chemical properties to petroleum-based diesel, which permits 100% renewable diesel (unlike 100% biodiesel) to flow through the same fuel storage and distribution network as petroleum diesel. Renewable diesel can also be used in its pure form in modern engines rather than as a blend with petroleum diesel and has similar cold weather performance as petroleum diesel. Renewable diesel and co-processed renewable diesel may receive 1.6 or 1.7 RINs per gallon, whereas biodiesel receives 1.5 RINs per gallon. As the value of RINs increases, this RIN advantage makes renewable diesel more cost-effective, both as a petroleum-based diesel substitute and for meeting RFS2 requirements. If renewable diesel proves to have superior performance characteristics and is more cost-effective than biodiesel, revenues from our biodiesel plants and our results of operations would be adversely impacted.

In view of the demand and price premium for renewable diesel, we are evaluating opportunities to expand our renewable diesel operations. The opportunities currently under review include a potential collaboration with Phillips 66 on the possible construction of a large-scale renewable diesel plant in Washington state. We have not reached a definitive agreement with Phillips 66 and an agreement may never be reached. We are also evaluating a large-scale expansion of our renewable diesel facility in Geismar, Louisiana. If we elect to undertake either or both of these projects to expand our renewable diesel capacity, we will be required to make substantial capital expenditures, we may incur significant indebtedness and there is no assurance that the new or expanded operations will operate profitably or profitably enough to support the investment we make.

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Perception about “food vs. fuel” could impact public policy which could impair our ability to operate at a profit and substantially harm our revenues and operating margins.

Some people believe that biomass-based diesel may increase the cost of food, as some feedstocks such as soybean oil used to make biomass-based diesel can also be used for food products. This debate is often referred to as “food vs. fuel.” This is a concern to the biomass-based diesel industry because biomass-based diesel demand is heavily influenced by government policy and if public opinion were to erode, it is possible that these policies could lose political support. These views could also negatively impact public perception of biomass-based diesel. Such claims have led some, including members of Congress, to urge the modification of current government policies which affect the production and sale of biofuels in the United States.

Concerns regarding the environmental impact of biomass-based diesel production could affect public policy which could impair our ability to operate at a profit and substantially harm our revenues and operating margins.

Under the Energy Independence and Security Act of 2007 ("EISA"), the EPA is required to produce a study every three years of the environmental impacts associated with current and future biofuel production and use, including effects on air and water quality, soil quality and conservation, water availability, energy recovery from secondary materials, ecosystem health and biodiversity, invasive species and international impacts. The only such triennial report was released in February 2012. The 2012 report concludes that (1) the extent of negative impacts to date are limited in magnitude and are primarily associated with the intensification of corn production; (2) whether future impacts are positive or negative will be determined by the choice of feedstock, land use change, cultivation and conservation practices; and (3) realizing potential benefits will require implementation and monitoring of conservation and best management practices, improvements in production efficiency, and implementation of innovative technologies at commercial scales. Should future EPA triennial studies, or other analyses find that biofuel production and use has resulted in, or could in the future result in, adverse environmental impacts, such findings could also negatively impact public perception and acceptance of biofuel as an alternative fuel, which also could result in the loss of political support. To the extent that state or federal laws are modified or public perception turns against biomass-based diesel, use requirements such as RFS2 and state tax incentives may not continue, which could materially harm our ability to operate profitably.

Nitrogen oxide emissions from biodiesel may harm its appeal as a renewable fuel and increase costs.

In some instances, biodiesel may increase emissions of nitrogen oxide as compared to petroleum-based diesel fuel, which could harm air quality. Nitrogen oxide is a contributor to ozone and smog. While newer diesel engines are believed to eliminate any such increase, emissions from older vehicles may decrease the appeal of biodiesel to environmental groups and agencies who have been historic supporters of the biodiesel industry, potentially harming our ability to market our biodiesel.

In addition, several states may act to regulate potential nitrogen oxide emissions from biodiesel. California adopted regulations that limit the volume of biodiesel that can be used or requires an additive to reduce potential emissions. In states where such an additive is required to sell biodiesel, the additional cost of the additive may make biodiesel less profitable or make biodiesel less cost competitive against petroleum-based diesel or renewable diesel, which would negatively impact our ability to sell biodiesel in such states and therefore have an adverse effect on our revenues and profitability.

We are dependent upon one supplier to provide hydrogen necessary to execute our renewable diesel production process and the loss of this supplier could disrupt our production process.

Our Geismar facility relies on one supplier to provide hydrogen necessary to execute the production process. Any disruptions to the hydrogen supply during production from this supplier will result in the shutdown of our Geismar plant operations. We are currently seeking additional hydrogen suppliers for our Geismar facility.

RISKS RELATED TO OUR INDEBTEDNESS

We and certain subsidiaries have indebtedness, which subjects us to potential defaults, that could adversely affect our ability to raise additional capital to fund our operations and limits our ability to react to changes in the economy or the biomass-based diesel industry.

At March 31, 2019, our total term debt before debt issuance costs was $185.1 million. This includes $75.9 million aggregate carrying value on our $96.3 million face amount, 4.00% convertible senior notes due in June 2036, which we refer to as the "2036 Convertible Senior Notes", and $66.8 million aggregate carrying value on our $67.4 million face value, 2.75% convertible senior notes due in June 2019, which we refer to as the "2019 Convertible Senior Notes". At March 31, 2019, our total term debt also includes borrowings at our Danville facility of $8.5 million, at our Ralston facility of $18.0 million, at our Grays Harbor facility of $8.5 million and at REG Capital LLC. of $7.1 million.

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Our indebtedness could:

• require us to dedicate a substantial portion of our cash flow from operations to payments of principal, interest on, and other fees related to such indebtedness, thereby reducing the availability of our cash flow to fund working capital and capital expenditures, and for other general corporate purposes;

• increase our vulnerability to general adverse economic and biomass-based diesel industry conditions, including interest rate fluctuations, because a portion of our revolving credit facilities are and will continue to be at variable rates of interest;

• limit our flexibility in planning for, or reacting to, changes in our business and the biomass-based diesel industry, which may place us at a competitive disadvantage compared to our competitors that have less debt; and

• limit among other things, our ability to borrow additional funds.

Our ability to make scheduled payments of the principal of, to pay interest on or to refinance our indebtedness, including the 2036 Convertible Senior Notes and 2019 Convertible Senior Notes, depends on our future financial performance, which is subject to several factors including economic, financial, competitive and other factors beyond our control. Our business may not generate cash flow from operations in the future sufficient to satisfy our obligations under our indebtedness or any future indebtedness we may incur as well as our ability to make necessary capital expenditures. If we are unable to generate such cash flow, we may be required to adopt one or more alternatives, such as reducing or delaying investments or capital expenditures, selling assets, refinancing or obtaining additional capital on terms that may be onerous or highly dilutive. Our ability to refinance our existing or future indebtedness will depend on the conditions in the capital markets and our financial condition prior to maturity of the indebtedness.

Despite our current indebtedness levels, we may still incur significant additional indebtedness. Incurring more indebtedness could increase the risks associated with our substantial indebtedness.

We and our subsidiaries may be able to incur substantial additional indebtedness, including additional secured indebtedness, in the future. As of March 31, 2019, we had $58.3 million of undrawn availability under our lines of credit, subject to borrowing base limitations. In addition, the indentures governing our convertible notes do not prevent us from incurring additional indebtedness or other liabilities that constitute indebtedness. If new debt or other liabilities are added to our current debt levels, the related risks that we and our subsidiaries now face could intensify.

We are subject to counterparty risk with respect to the capped call transactions that we entered into in connection with the issuance of our 2019 Convertible Senior Notes.

In connection with the issuance of our 2019 Convertible Senior Notes, we entered into privately-negotiated capped call transactions with various counterparties. The counterparties to the capped call transactions are financial institutions, and we will be subject to the risk that they might default under the capped call transactions. Our exposure to the credit risk of the option counterparties will not be secured by any collateral. Recent global economic conditions have resulted in the actual or perceived failure or financial difficulties of many financial institutions. If any option counterparty becomes subject to insolvency proceedings, we will become an unsecured creditor in those proceedings, with a claim equal to our exposure at that time under our transactions with such option counterparty. Our exposure will depend on many factors, but generally, an increase in our exposure will be correlated to an increase in the market price and volatility of shares of our common stock. In addition, upon a default by any option counterparty, we may suffer more dilution than we currently anticipate with respect to our common stock. We can provide no assurances as to the financial stability or viability of the option counterparties.

We may not have the ability to raise the funds necessary to settle conversions of our convertible notes in cash or to repurchase the convertible notes for cash upon a fundamental change or on a repurchase date, and our future debt may contain limitations on our ability to repurchase the convertible notes.

Holders of the 2019 or 2036 Convertible Senior Notes will have the right to require us to repurchase their 2019 or 2036 Convertible Senior Notes upon the occurrence of a fundamental change at a repurchase price generally equal to 100% of their principal amount, plus accrued and unpaid interest, if any.

Holders of the 2036 Convertible Senior Notes will also have the right to require us to repurchase their notes on each of June 15, 2021, June 15, 2026 and June 15, 2031 at a repurchase price generally equal to 100% of their principal amount, plus accrued and unpaid interest, if any.

In addition, holders of the 2019 and 2036 Convertible Senior Notes have the right to convert their notes during any calendar quarter when the last reported sale price of our common stock for 20 trading days during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the applicable conversion price, or $16.02 in the case of the 2019 Convertible Senior Notes and $14.01 in the case of the 2036 Convertible Senior Notes. Both series of notes became convertible due to the trading price of our common stock.

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The 2019 Convertible Senior Notes will mature on June 15, 2019 and can be converted at any time on or after December 15, 2018. In accordance with the indenture governing the 2019 Convertible Senior Notes, we have elected to settle all conversions of each $1,000 principal amount of notes being converted on or after October 23, 2018, with $1,000 in cash and any conversion value in excess of that amount in shares of our common stock. For the 2036 Convertible Senior Notes, our current intent is to settle conversions using cash for the principal amount of convertible senior notes converted, with the remaining value satisfied at the Company's option in cash, stock or a combination of cash and stock. However, we may not have enough available cash or be able to obtain financing at the time we are required to make repurchases of the 2019 or 2036 Convertible Senior Notes upon a fundamental change or to settle conversion of the 2019 or 2036 Convertible Senior Notes in cash.

In addition, our ability to repurchase the 2019 or 2036 Convertible Senior Notes may be limited by law, by regulatory authority or by agreements governing our future indebtedness. Our failure to repurchase 2019 or 2036 Convertible Senior Notes at a time when the repurchase is required by the indenture would constitute a default under the indenture governing the 2019 or 2036 Convertible Senior Notes. A default under the indenture or the fundamental change itself could also lead to a default under agreements governing our other indebtedness. If the repayment of the related indebtedness were to be accelerated after any applicable notice or grace periods, we may not have sufficient funds to repay the indebtedness and repurchase the convertible notes.

Certain provisions in the indenture governing the 2019 or 2036 Convertible Senior Notes could delay or prevent an otherwise beneficial takeover or takeover attempt of us.

Certain provisions in the 2019 or 2036 Convertible Senior Notes and the indenture could make it more difficult or more expensive for a third party to acquire us. For example, if a takeover would constitute a fundamental change, holders of the 2019 or 2036 Convertible Senior Notes will have the right to require us to repurchase their 2019 or 2036 Convertible Senior Notes in cash. In addition, if a takeover constitutes a make-whole fundamental change, we may be required to increase the conversion rate for holders who convert their 2019 or 2036 Convertible Senior Notes in connection with such takeover. In either case, and in other cases, our obligations under the 2019 or 2036 Convertible Senior Notes and the indenture could increase the cost of acquiring us or otherwise discourage a third party from acquiring us or removing incumbent management.

We are a holding company and there are limitations on our ability to receive dividends and distributions from our subsidiaries.

All of our principal assets, including our biomass-based diesel production facilities, are owned by subsidiaries and some of these subsidiaries are subject to loan covenants that generally restrict them from paying dividends, making distributions or making loans to us or to any other subsidiary. These limitations will restrict our ability to repay indebtedness, finance capital projects or pay dividends to stockholders from our subsidiaries’ cash flows from operations.

Our debt agreements impose significant operating and financial restrictions on our subsidiaries, which may prevent us from capitalizing on business opportunities.

Certain of our revolving and term credit agreements, including our M&L and Services Revolver, impose significant operating and financial restrictions on certain of our subsidiaries. These restrictions limit certain of our subsidiaries’ ability, among other things, to:

•incur additional indebtedness or issue certain disqualified stock and preferred stock;

•place restrictions on the ability of certain of our subsidiaries to pay dividends or make other payments to us;

•engage in transactions with affiliates;

•sell certain assets or merge with or into other companies;

•guarantee indebtedness; and

•create liens.

When (and for as long as) the availability under the M&L and Services Revolver is less than a specified amount for a certain period of time, funds deposited into deposit accounts used for collections will be transferred on a daily basis into a blocked account with the administrative agent and applied to prepay loans under the M&L and Services Revolver.

As a result of these covenants and restrictions, we may be limited in how we conduct our business and we may be unable to raise additional debt or equity financing to compete effectively or to take advantage of new business opportunities. The terms of any future indebtedness we may incur could include more restrictive covenants. There is no assurance that we will be able to maintain compliance with these covenants in the future and, if we fail to do so, that we will be able to obtain waivers from the lenders and/or amend the covenants.

There are limitations on our ability to incur the full $150.0 million of commitments under the M&L and Services Revolver. Borrowings under our M&L and Services Revolver are limited by a specified borrowing base consisting of a

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percentage of eligible accounts receivable and inventory, less customary reserves. In addition, under the M&L and Services Revolver, a monthly fixed charge coverage ratio would become applicable if excess availability under the M&L and Services Revolver is less than 10% of the total $150 million of current revolving loan commitments, or $15 million. As of March 31, 2019, availability under the M&L and Services Revolver was approximately $58.3 million. However, it is possible that excess availability under the Revolving Credit could fall below the 10% threshold in a future period. If the covenant trigger were to occur, our subsidiaries who are the borrowers under the M&L and Services Revolver would be required to satisfy and maintain on the last day of each month a fixed charge coverage ratio of at least 1.0x for the preceding twelve month period.

As of March 31, 2019, the fixed charge coverage ratio for our M&L and Services Revolver was approximately 0.413, which was below the minimum amount required for compliance with this ratio. However, as noted above, we are not required to comply with the minimum fixed charge covenant of 1.0 unless availability under the M&L and Services Revolver drops below the agreed threshold. Our ability to meet the required fixed charge coverage ratio can be affected by events beyond our control, and we cannot assure you that we will meet this ratio. A breach of any of these covenants would result in a default under the M&L and Services Revolver.

RISKS RELATED TO OUR COMMON STOCK

The market price for our common stock may be volatile.

The market price for our common stock is likely to be highly volatile and subject to wide fluctuations in response to factors including the following:

• actual or anticipated fluctuations in our financial condition and operating results;

• changes in the performance or market valuations of other companies engaged in our industry;

• issuance of new or updated research reports by securities or industry analysts;

• changes in financial estimates by us or of securities or industry analysts;

• investors’ general perception of us and the industry in which we operate;

• changes in the political climate in the industry in which we operate, existing laws, regulations and policies applicable to our business and products, including RFS2, and the continuation or adoption or failure to continue or adopt renewable energy requirements and incentives, including the BTC;

• other regulatory developments in our industry affecting us, our customers or our competitors;

• announcements of technological innovations by us or our competitors;

• announcement or expectation of additional financing efforts, including sales or expected sales of additional common stock;

• additions or departures of key management or other personnel;

• litigation;

• inadequate trading volume;

• general market conditions in our industry;

• whether our shares are included in stock market indexes such as the S&P SmallCap 600 index; and

• general economic and market conditions, including continued dislocations and downward pressure in the capital markets.

In addition, stock markets experience significant price and volume fluctuations from time to time that are not related to the operating performance of particular companies. These market fluctuations may have material adverse effect on the market price of our common stock.

We may issue additional common stock as consideration for future investments or acquisitions.

We have issued in the past, and may issue in the future, our securities in connection with investments and acquisitions. Our stockholders could suffer significant dilution, from our issuances of equity or convertible debt securities. Any new equity securities we issue could have rights, preferences and privileges superior to those of holders of our common stock. The amount of our common stock or securities convertible into or exchangeable for our common stock issued in connection with an investment or acquisition could constitute a material portion of our then outstanding common stock.

If we fail to maintain effective internal control over financial reporting, we might not be able to report our financial results accurately or prevent fraud. In that case, our stockholders could lose confidence in our financial reporting, which would harm our business and could negatively impact the value of our stock.

Effective internal controls are necessary for us to provide reliable financial reports and prevent fraud. The process of maintaining our internal controls may be expensive and time consuming and may require significant attention from management. Although we have concluded as of March 31, 2019 that our internal control over financial reporting provides reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external

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purposes in accordance with generally accepted accounting principles, because of its inherent limitations, internal control over financial reporting may not prevent or detect fraud or misstatements.

Failure to implement required new or improved controls, or difficulties encountered in their implementation, could harm our results of operations or cause us to fail to meet our reporting obligations. If we or our independent registered public accounting firm discover a material weakness, the disclosure of that fact could harm the value of our stock and our business.

Delaware law and our amended and restated certificate of incorporation and bylaws contain anti-takeover provisions that could delay or discourage takeover attempts that stockholders may consider favorable.

Provisions in our amended and restated certificate of incorporation and bylaws may have the effect of delaying or preventing a change of control or changes in our management. These provisions include the following:

• the right of the board of directors to elect a director to fill a vacancy created by the expansion of the board of directors;

• the requirement for advance notice for nominations for election to the board of directors or for proposing matters that can be acted upon at a stockholders’ meeting;

• the ability of the board of directors to alter our bylaws without obtaining stockholder approval;

• the ability of the board of directors to issue, without stockholder approval, up to 10,000,000 shares of preferred stock with rights set by the board of directors, which rights could be senior to those of common stock;

• a classified board;

• the required approval of holders of at least two-thirds of the shares entitled to vote at an election of directors to adopt, amend or repeal our bylaws or amend or repeal the provisions of our amended and restated certificate of incorporation regarding the classified board, the election and removal of directors and the ability of stockholders to take action by written consent; and

• the elimination of the right of stockholders to call a special meeting of stockholders and to take action by written consent.

In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law ("DGCL"). These provisions may prohibit or restrict large stockholders, in particular those owning 15% or more of our outstanding voting stock, from merging or combining with us. These provisions in our amended and restated certificate of incorporation and bylaws and under Delaware law could discourage potential takeover attempts and could reduce the price that investors might be willing to pay for shares of our common stock in the future and result in our market price being lower than it would without these provisions.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Sales of Unregistered Securities

None.

Issuer Purchases of Equity Securities

None.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None.

ITEM 6. EXHIBITS

(A) Exhibits:

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Exhibit No.	Description
10.1	Form of Restricted Stock Unit Award Agreement.*
10.2	Form of Performance-Based Restricted Stock Unit Award Agreement.*
31.1	Certification of the Chief Executive Officer pursuant to Rule 13a-14(a)/15d-14(a).
31.2	Certification of the Chief Financial Officer pursuant to Rule 13a-14(a)/15d-14(a).
32.1*	Certification of the Chief Executive Officer pursuant to 18 USC Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.**
32.2*	Certification of the Chief Financial Officer pursuant to 18 USC Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.**
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

* Management contract or compensatory plan, contract or arrangement.

** In accordance with Item 601(b)(32)(ii) of Regulation S-K and SEC Release No. 34-47986, the certifications furnished in Exhibit 32.1 and Exhibit 32.2 hereto are deemed to accompany this Form 10-Q and will not be deemed “filed” for purposes of Section 18 of the Exchange Act. Such certifications will not be deemed to be incorporated by reference into any filing under the Securities Act or the Exchange Act.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		RENEWABLE ENERGY GROUP, INC.
Dated:	May 3, 2019	By:	/s/ Cynthia J. Warner
			Cynthia J. Warner
			President and Chief Executive Officer (Principal Executive Officer)
Dated:	May 3, 2019	By:	/s/ Chad Stone
			Chad Stone
			Chief Financial Officer (Principal Financial Officer)
Dated:	May 3, 2019	By:	/s/ Todd M. Samuels
			Todd M. Samuels
			Chief Accounting Officer (Principal Accounting Officer)

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EX-10.1

RESTRICTED STOCK UNIT AWARD AGREEMENT

This Restricted Stock Unit Award Agreement (“Agreement”) memorializes the award effective as of ____________________ (the “Grant Date”), by and between Renewable Energy Group, Inc., a Delaware corporation (the “Company”), and ____________________ (“Employee”), pursuant to the Renewable Energy Group, Inc. Amended and Restated 2009 Stock Incentive Plan (the “Plan”). Employee and the Company agree to execute such further instruments and to take such further action as may reasonably be necessary to carry out the intent of this Agreement.

1.    Award. In consideration of Employee’s continued services as an Employee, and Employee’s agreement to enter into an Employee Non-Competition and Confidentiality Agreement, in a form approved by the Company, the Company hereby grants to Employee _____ Restricted Stock Units. Restricted Stock Units are notational units of measurement denominated in shares of common stock of Renewable Energy Group, Inc., $.0001 par value (“Common Stock”). Each Restricted Stock Unit represents a hypothetical share of Common Stock, subject to the conditions and restrictions on transferability set forth below and in the Plan. The Restricted Stock Units will be credited to Employee in an unfunded bookkeeping account established for Employee.

2.    Vesting of Restricted Stock Units. The period of time between the Grant Date and the vesting of Restricted Stock Units (and the termination of restrictions thereon) will be referred to herein as the “Restricted Period.”

(a)    Vesting Period. Unless earlier vested under subsection (b)(ii) below, or forfeited pursuant to this Agreement, ____________________ of the Restricted Stock Units will vest on________________________________________, subject to the Employee’s continued service as an Employee on each such vesting date. Upon vesting, each Restricted Stock Unit will be converted into one share of Company Common Stock and Employee will be issued shares of Common Stock equal to the number of vested Restricted Stock Units held.

(b)    Accelerated Vesting of Restricted Stock Units.

(i) Death, Disability or Approved Retirement. The Restricted Stock Units are not subject to accelerated vesting upon termination of employment or service by reason of death, Disability or Approved Retirement.

(ii) Change of Control. The Restricted Stock Units are subject to accelerated vesting in connection with a Change of Control to the extent provided in Section 10 of the Plan.

3.    Forfeitures of Restricted Stock Units. Upon termination of service as an Employee prior to the expiration of the Restricted Period and for any reason other than as described in Section 2(b)(ii), Employee shall immediately forfeit all Restricted Stock Units, without the payment of any consideration or further consideration by the Company. Upon forfeiture, neither Employee nor any successors, heirs, assigns, or legal representatives of Employee shall thereafter have any further rights or interest in the unvested Restricted Stock Units or certificates therefore.

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4.    Restrictions on Transfer Before Vesting.

(a)    Absent prior written consent of the Committee, the Restricted Stock Units granted hereunder to Employee may not be sold, assigned, transferred, pledged or otherwise encumbered, whether voluntarily or involuntarily, by operation of law or otherwise, from the Grant Date until such Restricted Stock Units have become vested and shares of Common Stock issued in conjunction with such vesting.

(b)    Consistent with the foregoing, except as contemplated by Section 9, no right or benefit under this Agreement shall be subject to transfer, anticipation, alienation, sale, assignment, pledge, encumbrance or charge, whether voluntary, involuntary, by operation of law or otherwise, and any attempt to transfer, anticipate, alienate, sell, assign, pledge, encumber or charge the same shall be void. No right or benefit hereunder shall in any manner be liable for or subject to any debts, contracts, liabilities or torts of the person entitled to such benefits. If Employee or his Beneficiary hereunder shall attempt to transfer, anticipate, alienate, assign, sell, pledge, encumber or charge any right or benefit hereunder, other than as contemplated by Section 9, or if any creditor shall attempt to subject the same to a writ of garnishment, attachment, execution, sequestration, or any other form of process or involuntary lien or seizure, then such attempt shall have no effect and shall be void.

5.    Rights as a Stockholder. Employee will have no rights as a stockholder with regard to the Restricted Stock Units prior to vesting. However, the Company will pay Dividend Equivalents on unvested Restricted Stock Units in the form of cash at such time as ordinary cash dividends are paid on the Company’s outstanding shares of Common Stock and that would have been payable had the corresponding Restricted Stock Units been outstanding shares of Common Stock.

6.    Taxes. To the extent that the vesting of the Restricted Stock Units or the receipt of Common Stock or dividend equivalents results in income to Employee for federal or state tax purposes, Employee shall deliver to the Company at the time of such vesting or receipt, as the case may be, such amount of money as the Company may require, or make other adequate arrangements satisfactory to the Company, at its discretion, to meet the Company’s obligations under applicable tax withholding laws or regulations. Employee also authorizes the Company to satisfy all tax withholding obligations of the Company from his or her wages or other cash compensation payable to Employee by the Company. Subject to the following sentence, the Company, in its sole discretion, may also provide for the withholding of applicable taxes from the proceeds of the sale of shares acquired upon vesting of the Restricted Stock Units, either through a voluntary sale or through a mandatory sale arranged by the Company (on Employee’s behalf pursuant to this authorization). Notwithstanding the foregoing, if requested by Employee, and if the Board consents, the Company shall withhold shares of Common Stock that would otherwise be issued upon vesting of the Restricted Stock Units to cover applicable withholding taxes, equal to the greatest number of whole shares having a Fair Market Value on the date immediately preceding the date on which the applicable tax liability is determined not in excess of the minimum amount required to satisfy the statutory withholding tax obligations with respect to the award. The Company may refuse to issue or deliver the shares of Common Stock unless all withholding taxes that may be due as a result of this award have been paid.

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7.    Changes in Capital Structure. If the outstanding shares of Common Stock or other securities of the Company, or both, shall at any time be changed or exchanged by declaration of a stock dividend, stock split, combination of shares, or recapitalization, the number and kind of Restricted Stock Units shall be appropriately and equitably adjusted so as to maintain the proportionate number of shares.

8.    Compliance with Securities Laws. The Company will not be required to deliver any shares of Common Stock pursuant to this Agreement if, in the opinion of counsel for the Company, such issuance would violate the Securities Act of 1933 or any other applicable federal or state securities laws or regulations. Prior to the issuance of any shares pursuant to this Agreement, the Company may require that Employee (or Employee’s legal representative upon Employee’s death or disability) enter into such written representations, warranties and agreements as the Company may reasonably request in order to comply with applicable securities laws or with this Agreement.

9.    Assignment. The Restricted Stock Units are not transferable (either voluntarily or involuntarily), other than pursuant to a domestic relations order. Employee may designate a beneficiary or beneficiaries (the “Beneficiary”) to whom the Restricted Stock Units will pass upon Employee’s death and may change such designation from time to time by filing a written designation of Beneficiary on such form as may be prescribed by the Company; provided that no such designation shall be effective until filed with the Company. Employee may change his Beneficiary without the consent of any prior Beneficiary by filing a new designation with the Company; provided that no such designation shall be effective prior to receipt by the Company. Following Employee’s death, the Restricted Stock Units will pass to the designated Beneficiary and such person will be deemed Employee for purposes of any applicable provisions of this Agreement. If no such designation is made or if the designated Beneficiary does not survive Employee’s death, the Restricted Stock Units shall pass by will or, if none, then by the laws of descent and distribution.

10.    Successors and Assigns. This Agreement shall bind and inure to the benefit of and be enforceable by Employee, the Company and their respective permitted successors or assigns (including personal representatives, heirs and legatees), except that Employee may not assign any rights or obligations under this Agreement except to the extent, and in the manner, expressly permitted herein.

11.    Limitation of Rights. Nothing in this Agreement or the Plan may be construed to:

(a)    give Employee any right to be awarded any further Restricted Stock Units (or other form of stock incentive awards) other than in the sole discretion of the Committee;

(b)    give Employee or any other person any interest in any fund or in any specified asset or assets of the Company or affiliate thereof (other than the Restricted Stock Units and applicable Common Stock following the vesting of such Restricted Stock Units); or

(c)    confer upon Employee the right to continue in the service of the Company or affiliate thereof as Employee.

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12.    Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of Iowa, without reference to principles of conflict of laws.

13.    Severability. The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other provision of this Agreement.

14.    No Waiver. The failure of Employee or the Company to insist upon strict compliance with any provision of this Agreement or the failure to assert any right Employee or the Company may have under this Agreement shall not be deemed to be a waiver of such provision or right or any other provision or right of this Agreement.

15.    Definitions. Capitalized terms used in this Agreement and not otherwise defined herein shall have the meanings set forth in the Plan. Certain other terms used herein have definitions given to them in the first place in which they are used.

16.     Section 409A.

To the fullest extent applicable, this Agreement and the benefits payable hereunder are intended to be exempt from the definition of “nonqualified deferred compensation” under Section 409A of the Code in accordance with the “short-term deferral” exception available under the regulations promulgated under Section 409A. In that regard, Common Stock shall be issued to Employee no later than March 15 following the calendar year in which Employee’s right to receive the Common Stock pursuant to this Agreement is no longer subject to a substantial risk of forfeiture within the meaning of Section 409A and the regulations thereunder. To the extent that any such benefit is or becomes subject to Section 409A due to a failure to qualify for an exemption from the definition of nonqualified deferred compensation in accordance with such regulations, this Agreement is intended to comply with the applicable requirements of Section 409A with respect to such benefits. This Agreement shall be interpreted and administered to the extent possible in a manner consistent with the foregoing statement of intent, and any ambiguity as to its compliance with Section 409A will be read in such a manner so that all payments hereunder comply with Section 409A of the Code.

17.    Entire Agreement.

(a)    Employee hereby acknowledges that he has received, reviewed and accepted the terms and conditions applicable to this Agreement. Employee hereby accepts such terms and conditions, subject to the provisions of the Plan and administrative interpretations thereof. Employee further agrees that the provisions of this Agreement, together with the Plan, constitute the entire and complete understanding and agreement between the parties with respect to the subject matter hereof, and supersede all prior and contemporaneous oral and written agreements, term sheets, representations and understandings of the parties, which are hereby terminated.

(b)    Employee hereby acknowledges that he is to consult with and rely upon only Employee’s own tax legal and financial advisors regarding the consequences and risks of this Agreement and the award of Restricted Stock Units.

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(c)    This Agreement may not be amended or modified except by a written agreement executed by the parties hereto or their respective successors and legal representatives. The captions of this Agreement are not part of the provisions hereof and shall have no force or effect.

18.    Counterparts. This Agreement may be executed in counterparts, which together shall constitute one and the same original.

[Signatures on following page]

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IN WITNESS WHEREOF, Renewable Energy Group, Inc. has caused this Agreement to be duly executed by one of its officers thereunto duly authorized, which execution may be facsimile, engraved or printed, which shall be deemed an original, and Employee has executed this Agreement, effective as of the day and year first above written.

RENEWABLE ENERGY GROUP, INC.

Company Officer Signature

Company Officer Printed Name

Company Officer Title

EMPLOYEE SIGNATURE

    [Name of Employee]

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EX-10.2

PERFORMANCE-BASED RESTRICTED STOCK UNIT AWARD AGREEMENT

This Performance-Based Restricted Stock Unit Award Agreement (“Agreement”) memorializes the award effective as of ____________________ (the “Grant Date”), by and between Renewable Energy Group, Inc., a Delaware corporation (the “Company”), and ____________________ (“Employee”), pursuant to the Renewable Energy Group, Inc. Amended and Restated 2009 Stock Incentive Plan (the “Plan”). Employee and the Company agree to execute such further instruments and to take such further action as may reasonably be necessary to carry out the intent of this Agreement.

1.    Award. In consideration of Employee’s continued services as an Employee, the Company hereby grants to Employee _____ Performance-Based Restricted Stock Units. Performance-Based Restricted Stock Units are notational units of measurement denominated in shares of common stock of Renewable Energy Group, Inc., par value $.0001 per share (“Common Stock”). Each Performance-Based Restricted Stock Unit represents a hypothetical share of Common Stock, subject to the conditions and restrictions on transferability set forth below and in the Plan. The Performance-Based Restricted Stock Units will be credited to Employee in an unfunded bookkeeping account established for Employee.

2.    Vesting of Performance-Based Restricted Stock Units.

(a) Performance Criteria for Vesting. Performance-based Restricted Stock Units will vest based on the Company’s performance during the performance period against the performance goals approved by the Compensation Committee of the Board of Directors and contained in the attached Exhibit A.

(b)    Accelerated Vesting of Performance-Based Restricted Stock Units.

(i) Death, Disability or Approved Retirement. The Performance-Based Restricted Stock Units are not subject to accelerated vesting upon termination of employment or service by reason of death, Disability or Approved Retirement.

(ii) Change of Control. The Performance-Based Restricted Stock Units may be subject to accelerated vesting and settlement in connection with a Change of Control to the extent provided in Section 10 of the Plan.

(c)    Timing of Settlement. Except as otherwise provided in this Section 2(c), vested Performance-Based Restricted Stock Units shall be settled as soon as practicable, but in no event later than thirty days, after the date for settlement specified in Exhibit A. In the event that the Company determines, pursuant to Section 6, to satisfy any withholding tax obligations arising upon the settlement of vested Performance-Based Restricted Stock Units by withholding shares of Common Stock otherwise issuable upon settlement, or by deducting such taxes from the proceeds of the sale of shares of Common Stock issued upon settlement, and the date specified for settlement in Exhibit A does not fall within a trading “window period” permitted under the Company’s insider trading policy, then settlement shall be delayed until the first trading date of the first “window period” beginning after such specified settlement date. In no event, however, shall settlement be delayed to a date later than March 15^th of the calendar year following the

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calendar year in which settlement should have occurred, but for the delay to comply with the Company’s insider trading policy.

3.    Forfeitures of Restricted Stock Units.

(a)    Termination of Employment or Service. Except as may be provided under Section 2(b)(ii), upon termination of employment or service for any reason, Employee shall immediately forfeit all Performance-Based Restricted Stock Units that have not vested on or prior to the date of such termination, without the payment of any consideration or further consideration by the Company. In addition, if Employee is terminated for Cause, Employee shall immediately forfeit any right to receive shares of Common Stock that have not yet been delivered to Employee, subject to deferred settlement described in Exhibit A, in respect of previously vested Performance-Based Restricted Stock Units, without the payment of any consideration or further consideration by the Company. Upon forfeiture, neither Employee nor any successors, heirs, assigns, or legal representatives of Employee shall thereafter have any further rights or interest in the forfeited Performance-Based Restricted Stock Units or shares of Common Stock.

(b)    Failure to Satisfy Performance Criteria. To the extent performance goals for Performance-Based Restricted Stock Units are not achieved during the performance periods set forth in Exhibit A, such Performance-Based Restricted Stock Units shall be immediately forfeited, without the payment of any consideration or further consideration by the Company. Upon forfeiture, neither Employee nor any successors, heirs, assigns, or legal representatives of Employee shall thereafter have any further rights or interest in the forfeited Performance-Based Restricted Stock Units.

4.    Restrictions on Transfer Before Vesting.

(a)    Absent prior written consent of the Compensation Committee, the Performance-Based Restricted Stock Units granted hereunder to Employee may not be sold, assigned, transferred, pledged or otherwise encumbered, whether voluntarily or involuntarily, by operation of law or otherwise, from the Grant Date until such Performance-Based Restricted Stock Units have become vested and shares of Common Stock issued in conjunction with such vesting. Moreover, a portion of the shares of Common Stock to be issued upon attainment of certain performance goals may be subject to transfer restrictions or deferred settlement as set forth in Exhibit A.

(b)    Consistent with the foregoing, except as contemplated by Section 9, no right or benefit under this Agreement shall be subject to transfer, anticipation, alienation, sale, assignment, pledge, encumbrance or charge, whether voluntary, involuntary, by operation of law or otherwise, and any attempt to transfer, anticipate, alienate, sell, assign, pledge, encumber or charge the same shall be void. No right or benefit hereunder shall in any manner be liable for or subject to any debts, contracts, liabilities or torts of the person entitled to such benefits. If Employee or his Beneficiary (as defined in Section 9 hereunder) shall attempt to transfer, anticipate, alienate, assign, sell, pledge, encumber or charge any right or benefit hereunder, other than as contemplated by Section 9, or if any creditor shall attempt to subject the same to a writ of garnishment, attachment, execution, sequestration, or any other form of process or involuntary lien or seizure, then such attempt shall have no effect and shall be void.

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5.    Rights as a Stockholder. Employee will have no rights as a stockholder with regard to the Performance-Based Restricted Stock Units unless and until the Performance-Based Restricted Stock Units vest and shares of Common Stock are issued in settlement thereof. Prior to such time, if the Company pays ordinary cash dividends on the Company’s outstanding shares of Common Stock, dividend equivalents shall be credited to the account of Employee equal to the amount of dividends that would have been payable had the corresponding Performance-Based Restricted Stock Units been outstanding shares of Common Stock. Such dividend equivalents shall be converted into additional Performance-Based Restricted Stock Units based on the Fair Market Value of the Common Stock on the dividend payment date, which additional units shall vest and be settled in the form of shares of Common stock, or shall be forfeited, in the same manner and at the same time or times as the underlying Performance-Based Restricted Stock Units to which they relate.

6.    Taxes. To the extent that the vesting of the Performance-Based Restricted Stock Units or the receipt of Common Stock or dividend equivalents results in a requirement to withhold taxes for federal or state tax purposes, Employee shall deliver to the Company at the time of such vesting or receipt, as the case may be, such amount of money as the Company may require, or make other adequate arrangements satisfactory to the Company, at its discretion, to meet the Company’s obligations under applicable tax withholding laws or regulations. Employee also authorizes the Company to satisfy all tax withholding obligations of the Company from his or her wages or other cash compensation payable to Employee by the Company. Subject to the following sentence, the Company, in its sole discretion, may also provide for the withholding of applicable taxes from the proceeds of the sale of shares acquired upon vesting of the Performance-Based Restricted Stock Units, either through a voluntary sale or through a mandatory sale arranged by the Company (on Employee’s behalf pursuant to this authorization). Notwithstanding the foregoing, if requested by Employee, and if the Board consents, the Company shall withhold shares of Common Stock that would otherwise be issued upon vesting of the Performance-Based Restricted Stock Units to cover applicable withholding taxes, equal to the greatest number of whole shares having a Fair Market Value on the date immediately preceding the date on which the applicable tax liability is determined not in excess of the minimum amount required to satisfy the statutory withholding tax obligations with respect to such Performance-Based Restricted Stock Units, or such greater amount as may be permitted under the Plan that does not exceed the maximum amount that would be permitted in order for the Performance-Based Restricted Stock Units to be accounted for as equity awards under Accounting Standards Codification (ASC) Topic 718. The Company may refuse to issue or deliver the shares of Common Stock unless all withholding taxes that may be due as a result of this award have been paid.

7.    Changes in Capital Structure. If the outstanding shares of Common Stock or other securities of the Company, or both, shall at any time be changed or exchanged by declaration of a stock dividend, stock split, combination of shares, or recapitalization, the number and kind of Performance-Based Restricted Stock Units shall be appropriately and equitably adjusted so as to maintain the proportionate number of shares.

8.    Compliance with Securities Laws. The Company will not be required to deliver any shares of Common Stock pursuant to this Agreement if, in the opinion of counsel for the Company, such issuance would violate the Securities Act of 1933 or any other applicable federal or state securities laws or regulations. Prior to the issuance of any shares pursuant to this Agreement, the Company may require that Employee (or Employee’s legal representative upon

3

Employee’s death or disability) enter into such written representations, warranties and agreements as the Company may reasonably request in order to comply with applicable securities laws or with this Agreement.

9.    Assignment. The Performance-Based Restricted Stock Units are not transferable (either voluntarily or involuntarily), other than pursuant to a domestic relations order. Employee may designate a beneficiary or beneficiaries (the “Beneficiary”) to whom any previously vested but unsettled Performance-Based Restricted Stock Units, and any shares of Common Stock previously issued upon settlement of vested Performance-Based Restricted Stock Units that have not yet been delivered to Employee, will pass upon Employee’s death and may change such designation from time to time by filing a written designation of Beneficiary on such form as may be prescribed by the Company; provided that no such designation shall be effective until filed with the Company. Employee may change his Beneficiary without the consent of any prior Beneficiary by filing a new designation with the Company; provided that no such designation shall be effective prior to receipt by the Company. Following Employee’s death, the vested Performance-Based Restricted Stock Units and shares of Common Stock will pass to the designated Beneficiary and such person will be deemed Employee for purposes of any applicable provisions of this Agreement. If no such designation is made or if the designated Beneficiary does not survive Employee’s death, the vested Performance-Based Restricted Stock Units and shares of Common Stock shall pass by will or, if none, then by the laws of descent and distribution.

10.    Successors and Assigns. This Agreement shall bind and inure to the benefit of and be enforceable by Employee, the Company and their respective permitted successors or assigns (including personal representatives, heirs and legatees), except that Employee may not assign any rights or obligations under this Agreement except to the extent, and in the manner, expressly permitted herein.

11.    Limitation of Rights. Nothing in this Agreement or the Plan may be construed to:

(a)    give Employee any right to be awarded any further Performance-Based Restricted Stock Units (or other form of stock incentive awards) other than in the sole discretion of the Committee;

(b)    give Employee or any other person any interest in any fund or in any specified asset or assets of the Company or affiliate thereof (other than the Performance-Based Restricted Stock Units and applicable Common Stock following the vesting of such Performance-Based Restricted Stock Units); or

(c)    confer upon Employee the right to continue in the service of the Company or affiliate thereof as Employee.

12.    Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of Iowa, without reference to principles of conflict of laws.

13.    Severability. The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other provision of this Agreement.

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14.    No Waiver. The failure of Employee or the Company to insist upon strict compliance with any provision of this Agreement or the failure to assert any right Employee or the Company may have under this Agreement shall not be deemed to be a waiver of such provision or right or any other provision or right of this Agreement.

15.    Definitions. Capitalized terms used in this Agreement and not otherwise defined herein shall have the meanings set forth in the Plan. Certain other terms used herein have definitions given to them in the first place in which they are used.

16.     Section 409A. To the fullest extent applicable, this Agreement and the benefits payable hereunder are intended to be exempt from the definition of “nonqualified deferred compensation” under Section 409A of the Code in accordance with the “short-term deferral” exception available under the regulations promulgated under Section 409A. In that regard, whenever possible under the terms of this Agreement, Common Stock shall be issued to Employee no later than March 15 following the calendar year in which Employee’s right to receive the Common Stock pursuant to this Agreement is no longer subject to a substantial risk of forfeiture within the meaning of Section 409A and the regulations thereunder. To the extent that any such benefit is or becomes subject to Section 409A due to a failure to qualify for an exemption from the definition of nonqualified deferred compensation in accordance with such regulations, this Agreement is intended to comply with the applicable requirements of Section 409A with respect to such benefits. This Agreement shall be interpreted and administered to the extent possible in a manner consistent with the foregoing statement of intent, and any ambiguity as to its compliance with Section 409A will be read in such a manner so that all payments hereunder comply with Section 409A of the Code.

17.    Entire Agreement.

(a)    Employee hereby acknowledges that he/she has received, reviewed and accepted the terms and conditions applicable to this Agreement. Employee hereby accepts such terms and conditions, subject to the provisions of the Plan and administrative interpretations thereof. Employee further agrees that the provisions of this Agreement, together with the Plan, constitute the entire and complete understanding and agreement between the parties with respect to the subject matter hereof, and supersede all prior and contemporaneous oral and written agreements, term sheets, representations and understandings of the parties, which are hereby terminated.

(b)    Employee hereby acknowledges that he/she is to consult with and rely upon only Employee’s own tax legal and financial advisors regarding the consequences and risks of this Agreement and the award of Performance-Based Restricted Stock Units.

(c)    This Agreement may not be amended or modified except by a written agreement executed by the parties hereto or their respective successors and legal representatives. The captions of this Agreement are not part of the provisions hereof and shall have no force or effect.

18.    Counterparts. This Agreement may be executed in counterparts, which together shall constitute one and the same original.

[Signatures on following page]

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IN WITNESS WHEREOF, Renewable Energy Group, Inc. has caused this Agreement to be duly executed by one of its officers thereunto duly authorized, which execution may be facsimile, engraved or printed, which shall be deemed an original, and Employee has executed this Agreement, effective as of the day and year first above written.

RENEWABLE ENERGY GROUP, INC.

Company Officer Signature

Company Officer Printed Name

Company Officer Title

EMPLOYEE SIGNATURE

[Name of Employee]

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Exhibit A

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EX-31.1

Exhibit 31.1

I, Cynthia J. Warner, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Renewable Energy Group, Inc.

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	May 3, 2019
		/s/ Cynthia J. Warner
		Cynthia J. Warner
		President and Chief Executive Officer

EX-31.2

Exhibit 31.2

I, Chad Stone, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Renewable Energy Group, Inc.

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated:	May 3, 2019
		/s/ Chad Stone
		Chad Stone
		Chief Financial Officer

EX-32.1

Exhibit 32.1

SECTION 1350 CERTIFICATIONS

I, Cynthia J. Warner, President and Chief Executive Officer of Renewable Energy Group, Inc. (the “Company”), certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge the Quarterly Report on Form 10-Q of the Company (the “Report”), which accompanies this Certificate, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and all information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	May 3, 2019
		/s/ Cynthia J. Warner
		Cynthia J. Warner
		President and Chief Executive Officer

EX-32.2

Exhibit 32.2

SECTION 1350 CERTIFICATIONS

I, Chad Stone, Chief Financial Officer of Renewable Energy Group, Inc. (the “Company”), certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge the Quarterly Report on Form 10-Q of the Company (the “Report”), which accompanies this Certificate, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and all information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	May 3, 2019
		/s/ Chad Stone
		Chad Stone
		Chief Financial Officer

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 30, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	RENEWABLE ENERGY GROUP, INC.
Entity Central Index Key	0001463258
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		37,618,998
Entity Emerging Growth Company	false
Entity Small Business	false

XML

Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 123,062	$ 123,575
Marketable securities	17,482	50,932
Accounts receivable (net of allowance for doubtful accounts of $460 and $673, respectively)	104,989	74,551
Inventories	220,566	168,900
Prepaid expenses and other assets	33,401	41,169
Restricted cash	3,000	3,000
Current assets held for sale	3,250	3,250
Total current assets	505,750	465,377
Property, plant and equipment, net	588,471	590,723
Right of use assets	42,109
Goodwill	16,080	16,080
Intangible assets, net	13,312	13,646
Other assets	20,677	21,270
TOTAL ASSETS	1,186,399	1,107,096
CURRENT LIABILITIES:
Lines of credit	102,612	14,250
Current maturities of long-term debt	150,339	149,006
Current maturities of operating lease obligations	17,606
Accounts payable	86,893	95,866
Accrued expenses and other liabilities	26,440	35,256
Deferred revenue	13,315	300
Total current liabilities	397,205	294,678
Unfavorable lease obligation	0	2,259
Deferred income taxes	7,973	8,410
Long-term debt (net of debt issuance costs of $3,217 and $3,390, respectively)	31,505	33,421
Long-term operating lease obligations	34,883	0
Other liabilities	1,592	3,075
Total liabilities	473,158	341,843
COMMITMENTS AND CONTINGENCIES
EQUITY:
Common stock ($.0001 par value; 300,000,000 shares authorized; 37,618,131 and 37,318,942 shares outstanding, respectively)	5	5
Common stock—additional paid-in-capital	452,646	451,427
Retained earnings	377,324	427,244
Accumulated other comprehensive income	(2,018)	(1,656)
Treasury stock (11,673,962 and 11,524,975 shares outstanding, respectively)	(114,716)	(111,767)
Total equity	713,241	765,253
TOTAL LIABILITIES AND EQUITY	$ 1,186,399	$ 1,107,096

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Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 460	$ 673
Debt issuance costs	$ 3,217	$ 3,390
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares, outstanding (in shares)	37,618,131	37,318,942
Treasury stock, shares outstanding (in shares)	11,673,962	11,524,975

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Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
REVENUES:
Revenues	$ 478,137	$ 687,225
Total revenues	478,209	688,002
Costs of goods sold	491,001	438,547
GROSS PROFIT (LOSS)	(12,792)	249,455
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	25,145	31,654
RESEARCH AND DEVELOPMENT EXPENSE	209	1,034
INCOME (LOSS) FROM OPERATIONS	(38,146)	216,767
OTHER INCOME (EXPENSE), NET:
Change in fair value of contingent consideration	(304)	(458)
Loss on debt extinguishment	(2)	(232)
Gain on involuntary conversion	0	4,000
Other income, net	854	1,215
Interest expense	(4,219)	(4,651)
Total other income (expense), net	(3,671)	(126)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(41,817)	216,641
INCOME TAX BENEFIT	430	1,203
NET INCOME (LOSS) FROM CONTINUING OPERATIONS	(41,387)	217,844
DISCONTINUED OPERATIONS:
Loss on operations of discontinued operations	(2,017)	(3,455)
NET LOSS ON DISCONTINUED OPERATIONS	(2,017)	(3,455)
NET INCOME (LOSS) TO THE COMPANY	(43,404)	214,389
LESS—EFFECT OF PARTICIPATING SHARE-BASED AWARDS ON CONTINUING OPERATIONS	0	5,236
NET INCOME (LOSS) FROM CONTINUING OPERATIONS ATTRIBUTABLE TO THE COMPANY’S COMMON STOCKHOLDERS	(41,387)	212,608
NET LOSS FROM DISCONTINUED OPERATIONS ATTRIBUTABLE TO THE COMPANY’S COMMON STOCKHOLDERS	$ (2,017)	$ (3,455)
Basic net income (loss) per share attributable to common stockholders:
Continuing operations (in dollars per share)	$ (1.11)	$ 5.48
Discontinued operations (in dollars per share)	(0.05)	(0.09)
Net income (loss) per share (in dollars per share)	(1.16)	5.39
Diluted net income (loss) per share attributable to common stockholders:
Continuing operations (in dollars per share)	(1.11)	5.38
Discontinued operations (in dollars per share)	(0.05)	(0.09)
Net income (loss) per share (in dollars per share)	$ (1.16)	$ 5.30
Weighted-average shares used to compute basic net loss per share attributable to common stockholders:
Basic (in shares)	37,353,352	38,819,443
Weighted-average shares used to compute diluted net loss per share attributable to common stockholders:
Continuing operations (in shares)	37,353,352	39,484,087
Discontinued operations (in shares)	37,353,352	38,819,443
Net income (loss) (in shares)	37,353,352	39,484,087
Biomass-based diesel
REVENUES:
Revenues	$ 455,206	$ 274,761
Costs of goods sold	484,413	405,810
Separated RINs
REVENUES:
Revenues	22,463	47,179
Costs of goods sold	6,585	32,737
Biomass-based diesel government incentives
REVENUES:
Revenues	468	365,285
Other
REVENUES:
Total revenues	72	777
Costs of goods sold	$ 3	$ 0

XML

Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (43,404)	$ 214,389
Unrealized gains (losses) on marketable securities, net of taxes of $0 and $0, respectively	(1)	0
Foreign currency translation adjustments	(361)	719
Other comprehensive income (loss)	(362)	719
Comprehensive income (loss) attributable to the Company	$ (43,766)	$ 215,108

XML

Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Taxes on unrealized gains (losses) on marketable securities	$ 0	$ 0

XML

Condensed Consolidated Statements of Equity (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Common Stock - Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning Balance (in shares) at Dec. 31, 2017		38,837,749
Beginning Balance at Dec. 31, 2017	$ 567,582	$ 5	$ 515,452	$ 134,928	$ 278	$ (83,081)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased) (in shares)		127,470
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased)	(621)					(621)
Settlement of stock appreciation rights in common stock (net of shares of treasury stock purchased) (in shares)		33,463
Settlement of stock appreciation rights in common stock (net of shares of treasury stock purchased)	(172)					(172)
Partial termination of capped call options (in shares)		(15,012)
Partial termination of capped call options	85		252			(167)
Convertible debt extinguishment impact (net of tax impact)	(440)		(440)
Treasury stock purchases (in shares)		(641,601)
Treasury stock purchases	(7,828)					(7,828)
Stock compensation expense	1,794		1,794
Other comprehensive loss	719				719
Net income (loss)	214,389			214,389
Ending Balance (in shares) at Mar. 31, 2018		38,342,069
Ending Balance at Mar. 31, 2018	775,508	$ 5	517,058	349,317	997	(91,869)
Beginning Balance (in shares) at Dec. 31, 2018		37,318,942
Beginning Balance at Dec. 31, 2018	765,253	$ 5	451,427	427,244	(1,656)	(111,767)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased) (in shares)		283,339
Conversion of restricted stock units to common stock (net of shares of treasury stock purchased)	(2,760)					(2,760)
Settlement of stock appreciation rights in common stock (net of shares of treasury stock purchased) (in shares)		16,937
Settlement of stock appreciation rights in common stock (net of shares of treasury stock purchased)	(171)		(12)			(159)
Partial termination of capped call options (in shares)		(1,087)
Partial termination of capped call options	0		30			(30)
Convertible debt extinguishment impact (net of tax impact)	(152)		(152)
Stock compensation expense	1,353		1,353
Other comprehensive loss	(362)				(362)
Net income (loss)	(43,404)			(43,404)
Ending Balance (in shares) at Mar. 31, 2019		37,618,131
Ending Balance at Mar. 31, 2019	$ 713,241	$ 5	$ 452,646	$ 377,324	$ (2,018)	$ (114,716)

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Condensed Consolidated Statements of Equity (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Convertible debt extinguishment impact, tax impact		$ 68
Treasury Stock | Restricted stock units
Conversion or settlement to common stock, net of treasury shares purchased (in shares)	138,012	51,995
Treasury Stock | Stock appreciation rights
Conversion or settlement to common stock, net of treasury shares purchased (in shares)	9,888	14,558

XML

Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (43,404)	$ 214,389
Net loss from discontinuing operations	(2,017)	(3,455)
Net income (loss) from continuing operations	(41,387)	217,844
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation expense	9,099	8,739
Amortization expense of assets and liabilities, net	4,441	368
Gain on involuntary conversion	0	(4,000)
Accretion of convertible note discount	1,095	1,357
Amortization of marketable securities	(129)	0
Change in fair value of contingent consideration	304	458
Gain on sale of assets	0	(990)
Loss on debt extinguishment	2	232
Provision (benefit) for doubtful accounts	(300)	314
Stock compensation expense	1,353	1,794
Deferred tax expense	(432)	(1,487)
Other operating activities	77	10
Changes in assets and liabilities:
Accounts receivable, net	(30,516)	(375,715)
Inventories	(52,009)	(35,891)
Prepaid expenses and other assets	9,342	26,582
Accounts payable	(8,618)	152,833
Accrued expenses and other liabilities	(5,352)	(16,046)
Operating lease obligations	(3,141)
Deferred revenue	13,016	(479)
Net cash flows used in operating activities - continuing operations	(103,155)	(24,077)
Net cash flows used in operating activities - discontinuing operations	(2,770)	(4,571)
Cash used in operating activities	(105,925)	(28,648)
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash paid for marketable securities	(3,478)	0
Cash received from maturities of marketable securities	37,084	0
Cash receipts for involuntary conversion	0	4,000
Cash paid for purchase of property, plant and equipment	(8,235)	(16,487)
Cash receipts for sale of assets	0	1,630
Cash paid for investments	(57)	0
Net cash flows provided by (used in) investing activities - continuing operations	25,314	(10,857)
Net cash flows used in investing activities - discontinuing operations	0	(336)
Cash provided by (used in) investing activities	25,314	(11,193)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings on revolving line of credit	84,754	40,514
Borrowings on other lines of credit	15,649	12,358
Repayments on other lines of credit	(11,908)	(12,992)
Cash received from notes payable	0	10,890
Cash paid on notes payable	(2,004)	(8,018)
Cash paid for debt issuance costs	(45)	(78)
Cash paid for treasury stock	0	(7,828)
Cash paid for contingent consideration settlement	(3,316)	(2,813)
Cash received on partial termination of capped call options	0	85
Cash paid for conversion of restricted stock units and stock appreciation rights	(2,931)	(793)
Net cash flows provided by financing activities - continuing operations	80,199	31,325
Net cash flows used in financing activities - discontinuing operations	0	0
Cash provided by financing activities	80,199	31,325
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(412)	(8,516)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, Beginning of period	126,575	77,627
Effect of exchange rate changes on cash	(101)	179
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, End of period	126,062	69,290
SUPPLEMENTAL DISCLOSURES OF CASH FLOWS INFORMATION:
Cash paid for income taxes	204	0
Cash paid for interest	849	1,154
Leased assets obtained in exchange for new operating lease liabilities	1,562	0
Amounts included in period-end accounts payable for:
Purchases of property, plant and equipment	2,165	7,123
Debt issuance cost	$ 0	$ 52

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Basis of Presentation and Nature of the Business

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation and Nature of the Business

BASIS OF PRESENTATION AND NATURE OF THE BUSINESS

The condensed consolidated financial statements have been prepared by Renewable Energy Group, Inc. and its subsidiaries (the "Company" or "REG"), pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been condensed or omitted as permitted by such rules and regulations. All adjustments, consisting of normal recurring adjustments, have been included. Management believes that the disclosures are adequate to present fairly the financial position, results of operations and cash flows at the dates and for the periods presented. It is suggested that these interim financial statements be read in conjunction with the consolidated financial statements and the notes thereto appearing in the Company’s latest annual report on Form 10-K filed on March 7, 2019. Results for interim periods are not necessarily indicative of those to be expected for the fiscal year.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts and related disclosures. Actual results could differ from those estimates.

As of March 31, 2019, the Company owns and operates a network of fourteen biorefineries, with twelve locations in North America and two locations in Europe, which includes thirteen operating biomass-based diesel production facilities with aggregate nameplate production capacity of 520 million gallons per year ("mmgy") and one fermentation facility. Ten of these plants are “multi-feedstock capable” which allows them to use a broad range of lower-cost feedstocks, such as inedible corn oil, used cooking oil and inedible animal fats in addition to vegetable oils, such as soybean oil and canola oil.

The biomass-based diesel industry and the Company’s business have benefited from certain federal and state incentives. The federal biodiesel mixture excise tax credit (the "BTC") was retroactively reinstated on February 9, 2018, for the fiscal year 2017, but has not been reinstated for 2018 or 2019 as of the date of this report. The expiration or modification of any one or more of those incentives, could adversely affect the financial results of the Company.

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The following accounting policies should be read in conjunction with a summary of the significant accounting policies the Company has disclosed in its Annual Report on Form 10-K for the year ended December 31, 2018.

Restricted Cash

The Company segregates certain cash balances as restricted cash that represent those funds required to be set aside by a contractual agreement. The Company classifies restricted cash between current and non-current assets based on the length of time of the restricted use.

As of March 31, 2019 and 2018, current restricted cash amounted to $3,000 and $0, respectively, which was held as pledges for letters of credit issued to support our operations. See the table below for reconciliation of "Cash, Cash Equivalents and Restricted Cash" in regards to the Condensed Consolidated Statements of Cash Flows:

	March 31, 2019		March 31, 2018
Cash and cash equivalents	$	123,062	$	69,290
Restricted cash	3,000		—
Total cash, cash equivalents and restricted cash in the Condensed Statements of Cash Flows	$	126,062	$	69,290

Marketable Securities

The Company’s marketable securities are classified as available-for-sale and are reported at fair value, with unrealized gains and losses, net of tax, recorded in accumulated other comprehensive income (loss). Realized gains or losses and declines in value judged to be other-than-temporary, if any, on available-for-sale securities are reported in other income, net. The Company evaluates such investments periodically for possible other-than-temporary impairment. A decline of fair value below amortized costs of debt securities is considered an other-than-temporary impairment if the Company has the intent to sell the security or if it is more likely than not that the Company will be required to sell the security before recovery of the entire amortized cost basis. In those instances, an impairment charge equal to the difference between the fair value and the amortized

cost basis is recognized in earnings. Regardless of the Company’s intent or requirement to sell a debt security, an impairment is considered other-than-temporary if the Company does not expect to recover the entire amortized cost basis; in those instances, a credit loss equal to the difference between the present value of the cash flows expected to be collected based on credit risk and the amortized cost basis of the debt security is recognized in earnings. The Company has no current requirement or intent to sell a material portion of marketable securities as of March 31, 2019. The Company expects to recover up to (or beyond) the initial cost of investment for securities held. In computing realized gains and losses on available-for-sale securities, the Company determines cost based on amounts paid, including direct costs such as commissions to acquire the security, using the specific identification method.

Renewable Identification Numbers ("RINs")

When the Company produces and sells a gallon of biomass-based diesel, 1.5 to 1.7 RINs per gallon are generated. RINs are used to track compliance with the Renewable Fuel Standard ("RFS2"). RFS2 allows the Company to attach between zero and 2.5 RINs to any gallon of biomass-based diesel. As a result, a portion of the selling price for a gallon of biomass-based diesel is generally attributable to RFS2 compliance. However, RINs that the Company generates are a form of government incentive and not a result of the physical attributes of the biomass-based diesel production. Therefore, no cost is allocated to the RIN when it is generated, regardless of whether the RIN is transferred with the biomass-based diesel produced or held by the Company pending attachment to other biomass-based diesel production sales.

In addition, the Company also obtains RINs from third parties who have separated the RINs from gallons of biomass-based diesel. From time to time, the Company holds varying amounts of these separated RINs for resale. RINs obtained from third parties are initially recorded at their cost and are subsequently revalued at the lower of cost or net realizable value as of the last day of each accounting period. The resulting adjustments are reflected in costs of goods sold for the period. The value of these RINs is reflected in “Prepaid expenses and other assets” on the Condensed Consolidated Balance Sheets. The cost of goods sold related to the sale of these RINs is determined using the average cost method, while market prices are determined by RIN values, as reported by the Oil Price Information Service ("OPIS").

Low Carbon Fuel Standard

The Company generates Low Carbon Fuel Standard ("LCFS") credits for its low carbon fuels or blendstocks when its qualified low carbon fuels are transported into an LCFS market. LCFS credits are used to track compliance with the LCFS. As a result, a portion of the selling price for a gallon of biomass-based diesel sold into an LCFS market is also attributable to LCFS compliance. However, LCFS credits that the Company generates are a form of government incentive and not a result of the physical attributes of the biomass-based diesel production. Therefore, no cost is allocated to the LCFS credit when it is generated, regardless of whether the LCFS credit is transferred with the biomass-based diesel produced or held by the Company.

In addition, the Company also obtains LCFS credits from third-party trading activities. From time to time, the Company holds varying amounts of these third-party LCFS credits for resale. LCFS credits obtained from third parties are initially recorded at their cost and are subsequently revalued at the lower of cost or net realizable value as of the last day of each accounting period, and the resulting adjustments are reflected in costs of goods sold for the period. The value of LCFS credits obtained from third parties is reflected in “Prepaid expenses and other assets” on the Condensed Consolidated Balance Sheet. The cost of goods sold related to the sale of these LCFS credits is determined using the average cost method, while market prices are determined by LCFS values, as reported by the OPIS. At March 31, 2019 and December 31, 2018, the Company held no LCFS credits purchased from third parties.

The Company records assets acquired and liabilities assumed through the exchange of non-monetary assets based on the fair value of the assets and liabilities acquired or the fair value of the consideration exchanged, whichever is more readily determinable.

Convertible Debt

In June 2016, the Company issued $152,000 aggregate principal amount of 4% convertible senior notes due in 2036 (the "2036 Convertible Senior Notes"). See "Note 8 - Debt" for a further description of the 2036 Convertible Senior Notes. During the three months ended March 31, 2019 and 2018, the Company made no repurchases of the 2036 Convertible Senior Notes.

In June 2014, the Company issued $143,800 aggregate principal amount of 2.75% convertible senior notes due in 2019 (the "2019 Convertible Senior Notes"). During the three months ended March 31, 2018, the Company used $6,689 under the 2017 Program (defined below in "Security Repurchase Programs") to repurchase $6,311 principal amount of the 2019 Convertible Senior Notes. During the three months ended March 31, 2019, the Company made no repurchases of the 2019 Convertible Senior Notes. See "Security Repurchase Programs" below.

Capped Call Transaction

In connection with the issuance of the 2019 Convertible Senior Notes, the Company entered into capped call transactions. The purchased capped call transactions were recorded as a reduction to common stock-additional paid-in-capital. Because this was considered to be an equity transaction and qualifies for the derivative scope exception, no future changes in the fair value of the capped call will be recorded by the Company. During 2016, in connection with the issuance of the 2036 Convertible Senior Notes, certain call options covered by the original capped call transaction were rebalanced and reset to cover 100% of the total number of shares of the Company's Common Stock underlying the remaining principal of the 2019 Convertible Senior Notes. The impact of these transactions, net of tax, was reflected as an addition/reduction to Additional Paid-in Capital as presented in the Condensed Consolidated Statements of Stockholders' Equity.

Security Repurchase Programs

In December 2017, June 2018 and January 2019, the Company's Board of Directors approved a repurchase program, each of up to $75,000 of the Company's convertible notes and/or shares of common stock (the "2017 Program","2018 Program", and "2019 Program", respectively). Under these programs, the Company may repurchase convertible notes or shares from time to time in open market transactions, privately negotiated transactions or by other means. The timing and amount of repurchase transactions under each program are determined by the Company's management based on its evaluation of market conditions, share price, bond price, legal requirements and other factors. During the three months ended March 31, 2018, the Company repurchased 641,601 shares of Common Stock for $7,828 under the 2017 Program. In that same period, the Company used approximately $6,689 under the 2017 Program to repurchase $6,311 principal amount of the 2019 Convertible Senior Notes. There were no share or note repurchases made under the 2017, 2018 or 2019 Programs during the quarter ended March 31, 2019.

Revenue Recognition

The Company generally has a single performance obligation in its arrangements with customers. The Company believes for most of its contracts with customers, control is transferred at a point in time, typically upon delivery to the customers. When the Company performs shipping and handling activities after the transfer of control to the customers (e.g., when control transfers prior to delivery), they are considered as fulfillment activities, and accordingly, the costs are accrued for when the related revenue is recognized. Taxes collected from customers relating to product sales and remitted to governmental authorities are excluded from revenues. The Company generally expenses sales commissions when incurred because the amortization period would have been less than one year. The Company records these costs within selling, general and administrative expenses.

The following is a description of principal activities from which we generate revenue. Revenues from contracts with customers are recognized when control of the promised goods or services are transferred to our customers, in an amount that reflects the consideration that we expect to receive in exchange for those goods or services.

• sales of biodiesel and renewable diesel produced at our facilities and acquired from third parties, including RINs and LCFS credits;

• resale of petroleum acquired from third parties, along with the sale of petroleum-based products further blended with biodiesel produced at our wholly owned facilities;

• sales of raw materials, glycerin, and other co-products of the biomass-based diesel production process;

• other revenue, including biomass-based diesel facility management and operational services; and

• incentive payments from federal and state governments, including the BTC, and from the USDA Advanced Biofuel Program.

Disaggregation of revenue:

All revenue recognized in the income statement, except for Biomass-based diesel Government Incentives, is considered to be revenue from contracts with customers. The following table depicts the disaggregation of revenue according to product line and segment:

	Reportable Segments
Three months ended March 31, 2019	Biomass-based Diesel		Services		Corporate and other		Intersegment Revenues			Consolidated Total
Biomass-based diesel sales, net of BTC related amount due to customers of $0	$	399,632	$	—	$	—	$	(85,520	)	$	314,112
Petroleum diesel sales	—		—		83,903		—			83,903
Other biomass-based diesel revenue	57,191		—		—		—			57,191
Separated RIN sales	22,463		—		—		—			22,463
Other revenues	—		19,583		—		(19,511		)	72
Total revenues from contracts with customers	$	479,286	$	19,583	$	83,903	$	(105,031	)	$	477,741
Biomass-based diesel government incentives	468		—		—		—			468
Total revenues	$	479,754	$	19,583	$	83,903	$	(105,031	)	$	478,209
Three months ended March 31, 2018	Biomass-based Diesel		Services		Corporate and other		Intersegment Revenues			Consolidated Total
Biomass-based diesel sales, net of BTC related amount due to customers of $144,944	$	166,191	$	—	$	3,579	$	(17,683	)	$	152,087
Petroleum diesel sales	—		—		70,964		—			70,964
Other biomass-based diesel revenue	51,710		—		—		—			51,710
Separated RIN sales	47,179		—		—		—			47,179
Other revenues	—		35,215		—		(34,438		)	777
Total revenues from contracts with customers	$	265,080	$	35,215	$	74,543	$	(52,121	)	$	322,717
Biomass-based diesel government incentives	365,285		—		—		—			365,285
Total revenues	$	630,365	$	35,215	$	74,543	$	(52,121	)	$	688,002

Contract balances:

The following table provides information about receivables and contract liabilities from contracts with customers:

	March 31, 2019			December 31, 2018
Accounts receivable	$	104,989		$	74,551
Short-term contract liabilities (deferred revenue)	$	(13,315	)	$	(300	)

The Company receives payments from customers based upon contractual billing schedules; accounts receivable are recorded when the right to consideration becomes unconditional. Contract liabilities include payments received in advance of performance under the contract, and are realized with the associated revenue recognized under the contract. Significant changes to the contract liabilities during the three months ended March 31, 2019 and 2018 are as follows:

	January 1, 2019		Cash receipts (Payments)		Less: Impact on Revenue			Other		March 31, 2019
Deferred revenue	$	300	$	28,658	$	15,643		$	—	$	13,315
	January 1, 2018		Cash receipts (Payments)		Less: Impact on Revenue			Other		March 31, 2018
Deferred revenue	$	2,218	$	10,507	$	10,985		$	—	$	1,740
Payables to customers related to BTC	—		—		(144,944		)	5,832		150,776
	$	2,218	$	10,507	$	(133,959	)	$	5,832	$	152,516

Discontinued Operations

Loss from discontinued operations mainly relates to the research and development activities of REG Life Sciences, the Company's industrial biotechnology business, which has been classified as assets held for sale following our decision to pursue a sale of this business in the fourth quarter of 2018. See "Note 5 - Discontinued Operations" for further details.

New Accounting Standards

On February 25, 2016, the FASB issued Accounting Standard Update ("ASU") 2016-02, Topic 842, Leases, which introduces a lessee model that brings most leases on the balance sheet. The new standard also aligns many of the underlying principles of the new lessor model with those in ASC 606, the FASB’s new revenue recognition standard (e.g., those related to evaluating when profit can be recognized). Furthermore, the ASU addresses other concerns related to the current leases model.

On July 19, 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases, which addresses certain aspects of the new leases standard, including the rate implicit in the lease, impairment of the net investment in the lease, lessee reassessment of lease classification, lessor reassessment of lease term and purchase options, variable payments that depend on an index or rate and certain transition adjustments, among other things. On July, 31, 2018, the FASB issued ASU 2018-11, Codification Improvements to Topic 842, Leases, which provides entities with an additional (and optional) transition method to adopt the new leases standard. Under this new transition method, an entity initially applies the new leases standard at the adoption date and recognizes a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption.

The Company adopted all of the ASU's related to ASC 842 effective January 1, 2019. The Company applied a modified retrospective transition approach. The Company did not elect the practical expedient (1) to reassess the lease classification for any expired or existing leases; (2) to reassess whether any expired or existing contracts are or contain leases and (3) to reassess initial direct costs. The Company elected the hindsight practical expedient to determine the reasonably certain lease term for existing leases and to assess the impairment of its right-of-use assets. While lease classification remained unchanged, hindsight resulted in generally shorter accounting lease terms and useful lives of the corresponding right of use assets. The hindsight analysis also resulted in an approximate negative impact on beginning retained earnings of $7,000, related to the impairment of a right-of-use asset at the Company's New Orleans facility. The Company elected the transitional practical expedient for existing or expired land easements, allowing the Company to elect not to assess whether those land easements are, or contain, leases in accordance with ASC 842. The Company also elected the practical expedient to adjust the carrying amount of the right-of-use assets for the unfavorable lease liability previously recognized on the balance sheet. Additionally, the Company made an accounting policy election that keeps leases with an initial term of 12 months or less off of the balance sheet and resulted in recognizing those lease payments in the Condensed Consolidated Statements of Operations on a straight-line basis over the lease term. Refer to "Note 9 - Leases" for further detail.

On August 28, 2017, the FASB issued ASU 2017-12, which amends the hedge accounting recognition and presentation requirements in ASC 815 to (1) improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities and (2) reduce the complexity of and simplify the application of hedge accounting by preparers. For public business entities, the amendments in ASU 2017-12 are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company believes that the ASU 2017-12 will allow more of its derivative contracts to qualify for hedge accounting elections. The Company adopted ASU 2017-12 effective January 1, 2019, and changes in fair value of derivatives continue to be recognized in current period earnings for the three months ended March 31, 2019.

On November 7, 2018, the FASB issued ASU 2018-16, which permits entities to use the Overnight Index Swap ("OIS") Rate based on Secured Overnight Financing Rate ("SOFR") as an eligible benchmark interest rate during the early stages of the transition from LIBOR to SOFR. For public business entities, the amendments in ASU 2018-16 are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company's adoption of ASU 2018-16 did not have a material impact on its consolidated financial statements.

On June 16, 2016, the FASB issued ASU 2016-13, which amends the Board's guidance on the impairment of financial instruments. The ASU 2016-13 adds to U.S. GAAP an impairment model (known as the current expected credit loss (CECL) model) that is based on expected losses rather than incurred losses. Under this new guidance, an entity recognizes as an allowance its estimate of expected credit losses. For public companies, the ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is evaluating the impact of this guidance, but does not expect it to have any material impact on its consolidated financial statements.

On August 28, 2018, the FASB issued ASU 2018-13, which changes the fair value measurement disclosure requirements of ASC 820. ASU 2018-13 eliminates or modifies certain disclosure requirements of ASC 820 and requires new disclosures relating to changes in unrealized gains or losses included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the applicable reporting period. ASU 2018-13 also explicitly requires entities to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU 2018-13 is effective for all entities for fiscal years beginning after December 15, 2019, including interim periods therein. The Company is evaluating the impact of this guidance on its consolidated financial statements, but does not expect the impact to be significant.

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Marketable Securities (Notes)

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

MARKETABLE SECURITIES

The Company's investments in marketable securities are stated at fair value and are available-for-sale. The following table summarizes the Company's investments in marketable securities:

	March 31, 2019
	Maturity	Gross Amortized Cost		Total Unrealized Gains		Total Unrealized Losses			Fair Value
Commercial paper	Within one year	$	8,485	$	—	$	(1	)	$	8,484
Corporate bonds	Within one year	8,998		—		—			8,998
Total		$	17,483	$	—	$	(1	)	$	17,482

	December 31, 2018
	Maturity	Gross Amortized Cost		Total Unrealized Gains		Total Unrealized Losses			Fair Value
Commercial paper	Within one year	$	22,886	$	—	$	(14	)	$	22,872
Corporate bonds	Within one year	28,074		—		(14		)	28,060
Total		$	50,960	$	—	$	(28	)	$	50,932

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Inventories

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Inventories

INVENTORIES

Inventories consist of the following:

	March 31, 2019		December 31, 2018
Raw materials	$	62,319	$	40,348
Work in process	3,967		3,840
Finished goods	154,280		124,712
Total	$	220,566	$	168,900

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Discontinued Operations (Notes)

3 Months Ended

Mar. 31, 2019

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

DISCONTINUED OPERATIONS

In the fourth quarter of 2018, concluding a comprehensive strategic assessment of the Company's development-stage industrial biotechnology business, REG Life Sciences, the Company's Board of Directors authorized it to pursue a plan to sell the REG Life Sciences core assets and business. The Company recorded an impairment loss, net of tax, of $11,226 on classifying the REG Life Sciences assets as held for sale reflecting the fair value of the estimated proceeds from the sale, net of costs to sell for the year ended December 31, 2018. This valuation technique is considered as Level 3 pricing category.

REG Life Sciences' results for all periods and for the three months endedMarch 31, 2019 are classified as discontinued operations. There was no income tax impact from discontinued operations for all periods.

Loss on Discontinued Operations:

	For the three months ended March 31,
	2019			2018
Other revenues	$	1,786		$	1,250
Other costs of goods sold	(2,200		)	(1,138		)
Research and development expense	(1,598		)	(5,564		)
Other income (expense), net	(5		)	1,997
Pre-tax loss from discontinued operations	(2,017		)	(3,455		)
Income tax expense	—			—
Loss on discontinued operations	$	(2,017	)	$	(3,455	)

Reconciliation of the Carrying Amounts of Major Classes of Assets and Liabilities Included in Assets and Liabilities Held for Sale:

	March 31, 2019			December 31, 2018
Machinery and equipment, net	$	824		$	824
In-process research and development	13,652			13,652
Impairment recognized on assets classified as held for sale	(11,226		)	(11,226		)
Total assets classified as held for sale	$	3,250		$	3,250

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Other Assets

3 Months Ended

Mar. 31, 2019

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Other Assets

OTHER ASSETS

Prepaid expense and other assets consist of the following:

	March 31, 2019		December 31, 2018
Commodity derivatives and related collateral, net	$	7,367	$	13,799
Prepaid expenses	15,264		17,187
Deposits	1,963		2,123
RIN inventory	3,061		2,000
Taxes receivable	2,365		2,991
Other	3,381		3,069
Total	$	33,401	$	41,169

RIN inventory values were adjusted in the amounts of $0 and $630 at March 31, 2019 and December 31, 2018, respectively, to reflect the lower of cost or net realizable value.

Other noncurrent assets consist of the following:

	March 31, 2019		December 31, 2018
Investments	$	13,199	$	13,053
Spare parts inventory	2,680		2,680
Catalysts	1,810		1,989
Deposits	381		381
Other	2,607		3,167
Total	$	20,677	$	21,270

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Intangible Assets

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

INTANGIBLE ASSETS

Intangible assets consist of the following:

	March 31, 2019
	Cost		Accumulated Amortization			Net
Raw material supply agreement	$	6,230	$	(2,986	)	$	3,244
Renewable diesel technology	8,300		(2,674		)	5,626
Ground lease	200		(160		)	40
Acquired customer relationships	4,747		(1,049		)	3,698
Trademarks	704		—			704
Total intangible assets	$	20,181	$	(6,869	)	$	13,312

	December 31, 2018
	Cost		Accumulated Amortization			Net
Raw material supply agreement	$	6,230	$	(2,866	)	$	3,364
Renewable diesel technology	8,300		(2,536		)	5,764
Ground lease	200		(157		)	43
Acquired customer relationships	4,747		(976		)	3,771
Trademarks	704		—			704
Total intangible assets	$	20,181	$	(6,535	)	$	13,646

The Company recorded intangible amortization expense of $334 and $324 for the three months ended March 31, 2019, and 2018, respectively.

The estimated intangible asset amortization expense for the remainder of 2019 through 2024 and thereafter is as follows:

April 1, 2019 through December 31, 2019	$	1,451
2020	1,672
2021	1,678
2022	1,671
2023	1,678
2024	1,685
2025 and thereafter	3,477
Total	$	13,312

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Debt

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Debt

DEBT

The following table shows the Company’s term debt:

	March 31, 2019		December 31, 2018
4.00% Convertible Senior Notes, $96,300 face amount, due in June 2036	$	75,940	$	75,477
2.75% Convertible Senior Notes, $67,380 face amount, due in June 2019	66,849		66,361
REG Danville term loan, secured, variable interest rate of LIBOR plus 4%, due in July 2022	8,548		8,964
REG Ralston term loan, variable interest rate of Prime Rate plus 2.25%, due in October 2025	18,035		18,948
REG Grays Harbor term loan, variable interest of minimum of 3.5% or Prime Rate plus 0.25%, due in May 2022	8,521		8,828
REG Capital term loan, fixed interest rate of 3.99%, due in January 2028	7,121		7,185
Other	47		54
Total term debt before debt issuance costs	185,061		185,817
Less: Current portion of long-term debt	150,339		149,006
Less: Debt issuance costs (net of accumulated amortization of $4,047 and $3,813, respectively)	3,217		3,390
Total long-term debt	$	31,505	$	33,421

2019 Convertible Senior Notes

In June 2014, the Company issued $143,800 in convertible senior notes (the "2019 Convertible Senior Notes") with a maturity date of June 15, 2019, unless earlier converted or repurchased. The 2019 Convertible Senior Notes bear interest at a rate of 2.75% per annum, payable semi-annually in arrears, beginning December 15, 2014. The initial conversion rate is 75.3963 shares of Common Stock per $1,000 principal amount of 2019 Convertible Senior Notes, which represents an initial conversion price of approximately $13.26 per share.

During 2018, the Company bought back $6,311 of principal of the 2019 Convertible Senior Notes. Such notes can be converted at any time on or after December 15, 2018 until such notes mature on June 15, 2019. In accordance with the indenture governing the 2019 Convertible Senior Notes, we have elected to settle all conversions of each $1,000 principal amount of such notes being converted on or after October 23, 2018, with $1,000 in cash and any conversion value in excess of that amount in shares of the Company's common stock.

2036 Convertible Senior Notes

On June 2, 2016, the Company issued $152,000 aggregate principal amount of the 2036 Convertible Senior Notes in a private offering to qualified institutional buyers. The 2036 Convertible Senior Notes bear interest at a rate of 4.00% per year payable semi-annually in arrears on June 15 and December 15 of each year, beginning December 15, 2016. The notes will mature on June 15, 2036, unless repurchased, redeemed or converted in accordance with their terms prior to such date.

Prior to December 15, 2035, the 2036 Convertible Senior Notes will be convertible only upon satisfaction of certain conditions and during certain periods as stipulated in the indenture. On or after December 15, 2035 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders of the 2036 Convertible Senior Notes may convert their notes at any time. The 2036 Convertible Senior Notes may be settled in cash, the Company’s common shares or a combination of cash and the Company’s common shares, at the Company’s election. The Company may not redeem the 2036 Convertible Senior Notes prior to June 15, 2021. Holders of the 2036 Convertible Senior Notes will have the right to require the Company to repurchase for cash all or some of their notes at 100% of their principal, plus any accrued and unpaid interest on each of June 15, 2021, June 15, 2026 and June 15, 2031. Holders of the 2036 Convertible Senior Notes will have the right to require the Company to repurchase for cash all or some of their notes at 100% of their principal, plus any accrued and unpaid interest upon the occurrence of certain fundamental changes. The initial conversion rate is 92.8074 common shares per $1,000 (one thousand) principal amount of 2036 Convertible Senior Notes (equivalent to an initial conversion price of approximately $10.78 per common share).

In addition, the 2036 Convertible Senior Notes will become convertible in the subsequent quarter if the closing price of the Company’s common stock exceeds $14.01, 130% of the Convertible Senior Notes’ initial conversion price, for at least 20 trading days during the 30 consecutive trading days prior to each quarter-end date. If the 2036 Convertible Senior Notes become convertible and should the holders elect to convert, the Company’s current intent and policy is to settle the principal amount the 2036 Convertible Senior Notes in cash, with the remaining value satisfied at the Company’s option in cash, stock or a combination of cash and stock. As of March 31, 2019 and December 31, 2018, the early conversion event was met based on the Company's stock price and as a result, the 2036 Convertible Senior Notes have been classified as a current liability on the Company's Condensed Consolidated Balance Sheets at March 31, 2019 and December 31, 2018.

The net proceeds from the offering of the 2036 Convertible Senior Notes were approximately $147,118, after deducting fees and offering expenses of $4,882, which was capitalized as debt issuance costs and is being amortized through June 2036. The debt discount is to be amortized through June 2036. The effective interest rate on the debt liability component was 2.45%.

Lines of Credit

The following table shows the Company's lines of credit:

	March 31, 2019		December 31, 2018
Amount outstanding under lines of credit	$	102,612	$	14,250
Maximum available to be borrowed under lines of credit	$	58,348	$	114,889

The Company's wholly-owned subsidiaries, REG Services Group, LLC and REG Marketing & Logistics Group, LLC, are borrowers under a Credit Agreement dated December 23, 2011 with the lenders party thereto (“Lenders”) and Wells Fargo Capital Finance, LLC, as the agent, (as amended, the “M&L and Services Revolver”). The maximum commitment of the Lenders under the M&L and Services Revolver to make revolving loans is $150,000, subject to an accordion feature, which allows the borrowers to request commitments for additional revolving loans in an aggregate amount not to exceed to $50,000, the making of which is subject to customary conditions, including the consent of Lenders providing such additional commitments.

The maturity date of the M&L and Services Revolver is September 30, 2021. Loans advanced under the M&L and Services Revolver bear interest based on a one-month LIBOR rate (which shall not be less than zero), plus a margin based on Quarterly Average Excess Availability (as defined in the Revolving Credit Agreement), which may range from 1.75% per annum to 2.25% per annum.

The M&L and Services Revolver contains various loan covenants that restrict each subsidiary borrower’s ability to take certain actions, including restrictions on incurrence of indebtedness, creation of liens, mergers or consolidations, dispositions of assets, repurchase or redemption of capital stock, making certain investments, making distributions to the Company unless certain conditions are satisfied, entering into certain transactions with affiliates or changing the nature of the subsidiary’s business. In addition, the subsidiary borrowers are required to maintain a fixed charge coverage ratio of at least 1.0 to 1.0 if excess availability under the M&L and Services Revolver is less than 10% of the total $150,000 of current revolving loan commitments, or $15,000 currently. The M&L and Services Revolver is secured by the subsidiary borrowers’ membership interests and substantially all of their assets. In addition, the M&L and Services Revolver is secured by the accounts receivable and inventory of REG Albert Lea, LLC, REG Houston, LLC, REG New Boston, LLC, REG Geismar, LLC, and REG Seneca, LLC (collectively, the "Plant Loan Parties") subject to a $40,000 limitation with respect to each of the Plant Loan Parties.

REG Germany has a trade finance facility agreement ("Uncommitted Credit Facility Agreement") with BNP Paribas, which allows it to borrow up to $25,000 for funding the purchase of goods and services. Amounts outstanding under the Uncommitted Credit Facility Agreement bear variable interest and are payable as stipulated in the agreement. The amount that can be borrowed under the agreement can be amended, cancelled or restricted at BNP Paribas's sole discretion and therefore is not included in the maximum available to be borrowed under lines of credit above. The Uncommitted Credit Facility Agreement contains various loan covenants that require REG Germany to maintain certain financial measures. At March 31, 2019, the nominal interest rates ranged from 1.50% to 4.39% per annum.

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Derivative Instruments

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

DERIVATIVE INSTRUMENTS

The Company enters into New York Mercantile Exchange NY Harbor ULSD ("NY Harbor ULSD" or previously referred to as heating oil), CBOT Soybean Oil (previously referred to as soybean oil) and New York Mercantile Exchange Natural Gas futures, swaps and options ("commodity contract derivatives") to reduce the risk of price volatility related to anticipated purchases of feedstock raw materials and to protect cash margins from potentially adverse effects of price volatility on biomass-based diesel sales where prices are set at a future date. All of the Company’s commodity contract derivatives are designated as non-hedge derivatives and recorded at fair value on the Condensed Consolidated Balance Sheets. Unrealized gains and losses are recognized as a component of biomass-based diesel costs of goods sold reflected in current results of operations. As of March 31, 2019, the net notional volumes of NY Harbor ULSD, CBOT Soybean Oil and NYMEX Natural Gas covered under the open commodity derivative contracts were approximately 92 million gallons, 76 million pounds and 2 million million British thermal units, respectively.

The Company offsets the fair value amounts recognized for its commodity contract derivatives with cash collateral with the same counterparty under a master netting agreement. The net position is presented within prepaid and other assets in the Condensed Consolidated Balance Sheets. The following table sets forth the fair value of the Company's commodity contract derivatives and amounts that offset within the Condensed Consolidated Balance Sheets:

	March 31, 2019						December 31, 2018
	Assets			Liabilities			Assets			Liabilities
Gross amounts of derivatives recognized at fair value	$	3,899		$	1,019		$	11,843		$	1,799
Cash collateral	4,487			—			3,755			—
Total gross amount recognized	8,386			1,019			15,598			1,799
Gross amounts offset	(1,019		)	(1,019		)	(1,799		)	(1,799		)
Net amount reported in the condensed consolidated balance sheets	$	7,367		$	—		$	13,799		$	—

The following table sets forth the commodity contract derivatives gains and (losses) included in the Condensed Consolidated Statements of Operations:

	Location of Gain (Loss) Recognized in income	Three Months   Ended   March 31,   2019			Three Months   Ended   March 31,   2018
Commodity derivatives	Cost of goods sold – Biomass-based diesel	$	(22,739	)	$	(2,438	)

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Leases

3 Months Ended

Mar. 31, 2019

Leases, Operating [Abstract]

Operating Leases

LEASES

The Company leases land, property and equipment under certain operating leases. The Company's leases consist primarily of access to distribution terminals, biomass-based diesel and feedstock storage tanks, railcars and vehicles. The Company determines at the inception of a lease whether an arrangement that provides the Company control over the use of an asset is a lease. The Company recognizes at lease commencement a right-of-use ("ROU") asset and lease liability based on the present value of the future lease payments over the lease term. As discussed in Note 2, the Company has elected not to recognize a ROU asset and lease liability for leases with terms of 12 months or less. At the end of the lease term the Company, generally, has the option to (a) return the leased equipment to the lessor, (b) purchase the property at its then fair value or (c) renew its lease at the fair rental value on a year-to-year basis or for an agreed upon term. When it is reasonably certain that the Company will exercise the option, the impact of the option is included in the lease term for purposes of determining total future lease payments. As most of its lease agreements do not explicitly state the discount rate implicit in the lease, the Company uses its incremental borrowing rate on the commencement date to calculate the present value of future payments.

The Company's leases commonly include payments that are based on the Consumer Price Index ("CPI") or other similar indices. If the indices are known at inception of the leases, they are included in the calculation of the ROU asset and lease liability. Other variable lease payments, such as usage-based amounts or when the indices are not known at inception, are excluded from the ROU asset and lease liability, and are expensed as incurred.

In addition to the base rent, office equipment leases typically contain provisions for maintenance services, which are considered non-lease components for accounting purposes. For these leases, nonlease components are excluded from our ROU assets and lease liabilities and expensed as incurred. For all other types of leases, we apply a practical expedient to include these non-lease components in calculating the ROU asset and lease liability.

The following table summarizes information about the Company's lease expense for the three months ended March 31, 2019:

	2019
Lease expense:
Operating lease expense	$	5,473
Variable lease expenses	1,764
Short-term and other lease expenses	426
Total lease expense	$	7,663

The weighted-average remaining lease term for the Company's operating leases is 5.81 years at March 31, 2019. The weighted-average discount rate for the Company's operating leases is 4.85% as of March 31, 2019.

For each of the next five calendar years and thereafter, future minimum lease payments and scheduled maturities under operating leases that have initial or remaining noncancelable lease terms in excess of one year are as follows:

	Total payments		Less: Discount		Operating lease obligation
April 1, 2019 through December 31, 2019	$	14,830	$	1,667	$	13,163
2020	15,107		1,565		13,542
2021	11,362		1,003		10,359
2022	3,525		675		2,850
2023	2,759		552		2,207
2024	1,713		472		1,241
2025 and thereafter	11,510		2,383		9,127
Total	$	60,806	$	8,317	$	52,489

As the Company has not restated prior-year information for its adoption of ASC Topic 842, the following presents the Company's future minimum lease payments for operating leases under ASC Topic 840 at December 31, 2018:

	Total Payments
2019	$	20,326
2020	14,063
2021	10,643
2022	3,162
2023	2,406
Thereafter	13,736
Total minimum payments	$	64,336

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Fair Value Measurement

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurement

FAIR VALUE MEASUREMENT

The fair value hierarchy prioritizes the inputs used in measuring fair value as follows:

• Level 1 — Quoted prices for identical instruments in active markets.

• Level 2 — Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations, in which all significant inputs are observable in active markets.

• Level 3 — Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

A summary of assets (liabilities) measured at fair value is as follows:

	As of March 31, 2019
	Total			Level 1		Level 2		Level 3
Commercial paper	$	8,484		$	—	$	8,484	$	—
Corporate bonds	$	8,998		—		8,998		—
Commodity contract derivatives	$	2,880		508		2,372		—
Contingent considerations for acquisitions	$	(6,849	)	—		—		(6,849		)
	$	13,513		$	508	$	19,854	$	(6,849	)

	As of December 31, 2018
	Total			Level 1		Level 2		Level 3
Commercial paper	$	22,872		$	—	$	22,872	$	—
Corporate bonds	$	28,060		—		28,060		—
Commodity contract derivatives	$	10,044		499		9,545		—
Contingent considerations for acquisitions	$	(9,861	)	—		—		(9,861		)
	$	51,115		$	499	$	60,477	$	(9,861	)

The following is a reconciliation of the beginning and ending balances for liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):

	Contingent Consideration for Acquisitions
	2019			2018
Balance at beginning of period, January 1	$	9,861		$	20,485
Change in estimates included in earnings	304			459
Settlements	(3,316		)	(2,813		)
Balance at end of period, March 31	$	6,849		$	18,131

The estimated fair values of the Company’s financial instruments, which are not recorded at fair value, are as follows:

	As of March 31, 2019						As of December 31, 2018
	Asset (Liability) Carrying Amount			Fair Value			Asset (Liability) Carrying Amount			Fair Value
Financial liabilities:
Debt and lines of credit	$	(287,673	)	$	(450,946	)	$	(200,067	)	$	(410,564	)

The carrying amounts reported in the Condensed Consolidated Balance Sheets for cash and cash equivalents, accounts receivable, accounts payable and accrued expenses approximate their fair values. Money market funds are included in cash and cash equivalents on the Condensed Consolidated Balance Sheets.

The Company used the following methods and assumptions to estimate fair value of its financial instruments:

Marketable securities: The fair value of marketable securities, which include commercial papers and corporate notes/bonds is obtained using quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets in markets that are not active and inputs other than quoted prices, e.g., interest rates and yield curves.

Commodity derivatives: The instruments held by the Company consist primarily of futures contracts, swap agreements, purchased put options and written call options. The fair value of contracts based on quoted prices of identical assets in an active exchange-traded market is reflected in Level 1. Contract fair value that is determined based on quoted prices of similar contracts in over-the-counter markets is reflected in Level 2.

Contingent consideration for acquisitions: The fair value of all other contingent consideration is determined using an expected present value technique. Expected cash flows are determined using the probability weighted-average of possible outcomes that would occur should the achievement of certain milestones related to the production and/or sale of biomass-based diesel at the specific production facility. A discount rate ranging from 5.8% to 12.5% is used to estimate the fair value of the expected payments.

Debt and lines of credit: The fair value of long-term debt and lines of credit was established using discounted cash flow calculations and current market rates reflecting Level 2 inputs.

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Net Income (Loss) Per Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Net Income (Loss) Per Share

NET INCOME (LOSS) PER SHARE

Basic net income (loss) per share is presented in conformity with the two-class method required for participating securities. Participating securities include restricted stock units ("RSUs").

Under the two-class method, net income is reduced for distributed and undistributed dividends earned in the current period. The remaining earnings are then allocated to Common Stock and the participating securities. The Company calculates the effects of participating securities on diluted earnings per share ("EPS") using both the “if-converted or treasury stock” and "two-class" methods and discloses the method which results in a more dilutive effect. The effects of Common Stock options, warrants, stock appreciation rights and convertible notes on diluted EPS are calculated using the treasury stock method unless the effects are anti-dilutive to EPS.

For the 2036 Convertible Senior Notes, the Company’s current intent is to settle conversions using cash for the principal amount of convertible senior notes converted, with the remaining value satisfied at the Company’s option in cash, stock or a combination of cash and stock. For the 2019 Convertible Senior Notes, the Company has elected to settle the principal amount of convertible notes converted with cash and any conversion value in excess of that amount in shares of the Company's common stock. Therefore, the dilutive effect of the convertible senior notes is limited to the conversion premium.

The following potentially dilutive weighted average securities were excluded from the calculation of diluted net income (loss) per share attributable to common stockholders during the periods presented, as the effect was anti-dilutive:

	Three Months   Ended   March 31,   2019	Three Months   Ended   March 31,   2018
Stock appreciation rights	1,012,097	1,006,849
2019 Convertible Senior Notes	2,624,215	5,377,690
2036 Convertible Senior Notes	3,737,641	13,545,060
Total	7,373,953	19,929,599

The following table presents the calculation of diluted net income (loss) per share attributable to common stockholders:

	Three Months   Ended   March 31,   2019			Three Months   Ended   March 31,   2018
Net income (loss) from continuing operations attributable to the Company’s common stockholders - Basic	$	(41,387	)	$	212,608
Plus (less): effect of participating securities	—			5,236
Net income (loss) attributable to common stockholders	(41,387		)	217,844
Less: effect of participating securities	—			(5,236		)
Net income (loss) from continuing operations attributable to the Company's common stockholders - Diluted	$	(41,387	)	$	212,608
Net loss from discontinued operations attributable to the Company's common stockholders - Basic and Diluted	$	(2,017	)	$	(3,455	)
Net income (loss) attributable to the Company's common stockholders - Basic	$	(43,404	)	$	209,238
Plus (less): effect of participating securities	—			5,151
Net income (loss) attributable to common stockholders	(43,404		)	214,389
Less: effect of participating securities	—			(5,151		)
Net income (loss) attributable to the Company's common stockholders - Diluted	$	(43,404	)	$	209,238
Shares:
Weighted-average shares used to compute basic net income (loss) per share	37,353,352			38,819,443
Adjustment to reflect conversion of convertible notes	—			561,665
Adjustment to reflect stock appreciation right conversions	—			102,979
Weighted-average shares used to compute diluted net income (loss) per share	37,353,352			39,484,087
Net income (loss) per share attributable to common stockholders - Diluted
Continuing operations	$	(1.11	)	$	5.38
Discontinued operations	$	(0.05	)	$	(0.09	)
Diluted net income (loss)	$	(1.16	)	$	5.30

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Reportable Segments and Geographic Information

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Reportable Segments and Geographic Information

REPORTABLE SEGMENTS AND GEOGRAPHIC INFORMATION

The Company reports its reportable segments based on products and services provided to customers. The Company re-assesses its reportable segments on an annual basis. The Company's reportable segments generally align the Company's external financial reporting segments with its internal operating segments, which are based on its internal organizational structure, operating decisions and performance assessment. In the fourth quarter of 2018, concluding a comprehensive strategic assessment of the Company's Life Sciences business, which primarily represented the Renewable Chemicals reportable segment, the Company's Board of Directors authorized it to pursue a plan to sell REG Life Sciences. As a result of this authorization, the Company's reportable segments at March 31, 2019 and for the year ended December 31, 2018 are composed of Biomass-based Diesel, Services and Corporate and other activities. The accounting policies of the segments are the same as those described in the summary of significant accounting policies. All prior period disclosures below have been recast to present results on a comparable basis.

The Biomass-based Diesel segment processes waste vegetable oils, animal fats, virgin vegetable oils and other feedstocks into biomass-based diesel. The Biomass-based Diesel segment also includes the Company’s purchases and resale of biomass-based diesel produced by third parties. Revenue is derived from the purchases and sales of biomass-based diesel, RINs and raw material feedstocks acquired from third parties, sales of biomass-based diesel produced under toll manufacturing arrangements with third party facilities, sales of processed biomass-based diesel from Company facilities, related by-products and renewable energy government incentive payments, in the U.S. and internationally.

The Services segment offers services for managing the construction of biomass-based diesel production facilities and managing ongoing operations of third-party plants and collects fees related to the services provided. The Company does not allocate items that are of a non-operating nature or corporate expenses to the business segments. Revenues from services provided to other segments are recorded by the Services segment at cost.

The Corporate and Other segment includes trading activities related to petroleum-based heating oil and diesel fuel as well as corporate activities, which consist of corporate office expenses such as compensation, benefits, occupancy and other administrative costs, including management service expenses. Corporate and Other also includes income/(expense) not associated with the reportable segments, such as corporate general and administrative expenses, shared service expenses, interest expense and interest income, all reflected on an accrual basis of accounting. In addition, Corporate and Other includes cash and other assets not associated with the reportable segments, including investments. Intersegment revenues are reported by the Services and Corporate and Other segments.

The following table represents the significant items by reportable segment:

	Three Months   Ended   March 31,   2019			Three Months   Ended   March 31,   2018
Net sales from continuing operations:
Biomass-based Diesel	$	479,754		$	630,365
Services	19,583			35,215
Corporate and Other	83,903			74,543
Intersegment revenues	(105,031		)	(52,121		)
	$	478,209		$	688,002
Income (loss) from continuing operations before income taxes:
Biomass-based Diesel	$	(40,278	)	$	215,529
Services	(869		)	5,024
Corporate and Other	(670		)	(3,914		)
	$	(41,817	)	$	216,639
Depreciation and amortization expense, net:
Biomass-based Diesel	$	12,024		$	8,037
Services	630			329
Corporate and Other	886			741
	$	13,540		$	9,107
Cash paid for purchases of property, plant and equipment:
Biomass-based Diesel	$	7,688		$	15,603
Services	547			851
Corporate and Other	—			33
	$	8,235		$	16,487

	March 31, 2019			December 31, 2018
Goodwill:
Services	$	16,080		$	16,080
Assets:
Biomass-based Diesel	$	1,026,539		$	914,843
Services	55,926			63,720
Corporate and Other	407,564			379,658
Intersegment eliminations	(306,880		)	(254,375		)
Assets held for sale	3,250			3,250
	$	1,186,399		$	1,107,096

Geographic Information:

The following geographic data include net sales attributed to the countries based on the location of the subsidiary making the sale and long-lived assets based on physical location. Long-lived assets represent the net book value of property, plant and equipment.

	Three Months   Ended   March 31,   2019		Three Months   Ended   March 31,   2018
Net revenues:
United States	$	438,605	$	639,674
Germany	39,468		46,356
Other Foreign	136		1,972
Non-United States	39,604		48,328
	$	478,209	$	688,002

	March 31, 2019		December 31, 2018
Long-lived assets:
United States	$	569,474	$	571,045
Germany	18,331		18,972
Other Foreign	666		706
	$	588,471	$	590,723

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

The Company is involved in legal proceedings in the normal course of business. The Company currently believes that any ultimate liability arising out of such proceedings will not have a material adverse effect on the Company’s financial position, results of operations or cash flows.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Restricted Cash

Restricted Cash

The Company segregates certain cash balances as restricted cash that represent those funds required to be set aside by a contractual agreement. The Company classifies restricted cash between current and non-current assets based on the length of time of the restricted use.

Marketable Securities

Marketable Securities

The Company’s marketable securities are classified as available-for-sale and are reported at fair value, with unrealized gains and losses, net of tax, recorded in accumulated other comprehensive income (loss). Realized gains or losses and declines in value judged to be other-than-temporary, if any, on available-for-sale securities are reported in other income, net. The Company evaluates such investments periodically for possible other-than-temporary impairment. A decline of fair value below amortized costs of debt securities is considered an other-than-temporary impairment if the Company has the intent to sell the security or if it is more likely than not that the Company will be required to sell the security before recovery of the entire amortized cost basis. In those instances, an impairment charge equal to the difference between the fair value and the amortized

cost basis is recognized in earnings. Regardless of the Company’s intent or requirement to sell a debt security, an impairment is considered other-than-temporary if the Company does not expect to recover the entire amortized cost basis; in those instances, a credit loss equal to the difference between the present value of the cash flows expected to be collected based on credit risk and the amortized cost basis of the debt security is recognized in earnings. The Company has no current requirement or intent to sell a material portion of marketable securities as of March 31, 2019. The Company expects to recover up to (or beyond) the initial cost of investment for securities held. In computing realized gains and losses on available-for-sale securities, the Company determines cost based on amounts paid, including direct costs such as commissions to acquire the security, using the specific identification method.

Renewable Identification Numbers (RINs)

Renewable Identification Numbers ("RINs")

When the Company produces and sells a gallon of biomass-based diesel, 1.5 to 1.7 RINs per gallon are generated. RINs are used to track compliance with the Renewable Fuel Standard ("RFS2"). RFS2 allows the Company to attach between zero and 2.5 RINs to any gallon of biomass-based diesel. As a result, a portion of the selling price for a gallon of biomass-based diesel is generally attributable to RFS2 compliance. However, RINs that the Company generates are a form of government incentive and not a result of the physical attributes of the biomass-based diesel production. Therefore, no cost is allocated to the RIN when it is generated, regardless of whether the RIN is transferred with the biomass-based diesel produced or held by the Company pending attachment to other biomass-based diesel production sales.

In addition, the Company also obtains RINs from third parties who have separated the RINs from gallons of biomass-based diesel. From time to time, the Company holds varying amounts of these separated RINs for resale. RINs obtained from third parties are initially recorded at their cost and are subsequently revalued at the lower of cost or net realizable value as of the last day of each accounting period. The resulting adjustments are reflected in costs of goods sold for the period. The value of these RINs is reflected in “Prepaid expenses and other assets” on the Condensed Consolidated Balance Sheets. The cost of goods sold related to the sale of these RINs is determined using the average cost method, while market prices are determined by RIN values, as reported by the Oil Price Information Service ("OPIS").

Low Carbon Fuel Standard

Low Carbon Fuel Standard

The Company generates Low Carbon Fuel Standard ("LCFS") credits for its low carbon fuels or blendstocks when its qualified low carbon fuels are transported into an LCFS market. LCFS credits are used to track compliance with the LCFS. As a result, a portion of the selling price for a gallon of biomass-based diesel sold into an LCFS market is also attributable to LCFS compliance. However, LCFS credits that the Company generates are a form of government incentive and not a result of the physical attributes of the biomass-based diesel production. Therefore, no cost is allocated to the LCFS credit when it is generated, regardless of whether the LCFS credit is transferred with the biomass-based diesel produced or held by the Company.

In addition, the Company also obtains LCFS credits from third-party trading activities. From time to time, the Company holds varying amounts of these third-party LCFS credits for resale. LCFS credits obtained from third parties are initially recorded at their cost and are subsequently revalued at the lower of cost or net realizable value as of the last day of each accounting period, and the resulting adjustments are reflected in costs of goods sold for the period. The value of LCFS credits obtained from third parties is reflected in “Prepaid expenses and other assets” on the Condensed Consolidated Balance Sheet. The cost of goods sold related to the sale of these LCFS credits is determined using the average cost method, while market prices are determined by LCFS values, as reported by the OPIS. At March 31, 2019 and December 31, 2018, the Company held no LCFS credits purchased from third parties.

The Company records assets acquired and liabilities assumed through the exchange of non-monetary assets based on the fair value of the assets and liabilities acquired or the fair value of the consideration exchanged, whichever is more readily determinable.

Convertible Debt

Convertible Debt

In June 2016, the Company issued $152,000 aggregate principal amount of 4% convertible senior notes due in 2036 (the "2036 Convertible Senior Notes"). See "Note 8 - Debt" for a further description of the 2036 Convertible Senior Notes.

Capped Call Transaction

Capped Call Transaction

In connection with the issuance of the 2019 Convertible Senior Notes, the Company entered into capped call transactions. The purchased capped call transactions were recorded as a reduction to common stock-additional paid-in-capital. Because this was considered to be an equity transaction and qualifies for the derivative scope exception, no future changes in the fair value of the capped call will be recorded by the Company. During 2016, in connection with the issuance of the 2036 Convertible Senior Notes, certain call options covered by the original capped call transaction were rebalanced and reset to cover 100% of the total number of shares of the Company's Common Stock underlying the remaining principal of the 2019 Convertible Senior Notes. The impact of these transactions, net of tax, was reflected as an addition/reduction to Additional Paid-in Capital as presented in the Condensed Consolidated Statements of Stockholders' Equity.

Security Repurchase Programs

Security Repurchase Programs

In December 2017, June 2018 and January 2019, the Company's Board of Directors approved a repurchase program, each of up to $75,000 of the Company's convertible notes and/or shares of common stock (the "2017 Program","2018 Program", and "2019 Program", respectively). Under these programs, the Company may repurchase convertible notes or shares from time to time in open market transactions, privately negotiated transactions or by other means. The timing and amount of repurchase transactions under each program are determined by the Company's management based on its evaluation of market conditions, share price, bond price, legal requirements and other factors.

Revenue Recognition

Revenue Recognition

The Company generally has a single performance obligation in its arrangements with customers. The Company believes for most of its contracts with customers, control is transferred at a point in time, typically upon delivery to the customers. When the Company performs shipping and handling activities after the transfer of control to the customers (e.g., when control transfers prior to delivery), they are considered as fulfillment activities, and accordingly, the costs are accrued for when the related revenue is recognized. Taxes collected from customers relating to product sales and remitted to governmental authorities are excluded from revenues. The Company generally expenses sales commissions when incurred because the amortization period would have been less than one year. The Company records these costs within selling, general and administrative expenses.

The following is a description of principal activities from which we generate revenue. Revenues from contracts with customers are recognized when control of the promised goods or services are transferred to our customers, in an amount that reflects the consideration that we expect to receive in exchange for those goods or services.

• sales of biodiesel and renewable diesel produced at our facilities and acquired from third parties, including RINs and LCFS credits;

• resale of petroleum acquired from third parties, along with the sale of petroleum-based products further blended with biodiesel produced at our wholly owned facilities;

• sales of raw materials, glycerin, and other co-products of the biomass-based diesel production process;

• other revenue, including biomass-based diesel facility management and operational services; and

• incentive payments from federal and state governments, including the BTC, and from the USDA Advanced Biofuel Program.

Disaggregation of revenue:

All revenue recognized in the income statement, except for Biomass-based diesel Government Incentives, is considered to be revenue from contracts with customers.

The Company receives payments from customers based upon contractual billing schedules; accounts receivable are recorded when the right to consideration becomes unconditional. Contract liabilities include payments received in advance of performance under the contract, and are realized with the associated revenue recognized under the contract.

Discontinued Operations

Discontinued Operations

Loss from discontinued operations mainly relates to the research and development activities of REG Life Sciences, the Company's industrial biotechnology business, which has been classified as assets held for sale following our decision to pursue a sale of this business in the fourth quarter of 2018. See "Note 5 - Discontinued Operations" for further details.

New Accounting Standards

New Accounting Standards

On February 25, 2016, the FASB issued Accounting Standard Update ("ASU") 2016-02, Topic 842, Leases, which introduces a lessee model that brings most leases on the balance sheet. The new standard also aligns many of the underlying principles of the new lessor model with those in ASC 606, the FASB’s new revenue recognition standard (e.g., those related to evaluating when profit can be recognized). Furthermore, the ASU addresses other concerns related to the current leases model.

On July 19, 2018, the FASB issued ASU 2018-10, Codification Improvements to Topic 842, Leases, which addresses certain aspects of the new leases standard, including the rate implicit in the lease, impairment of the net investment in the lease, lessee reassessment of lease classification, lessor reassessment of lease term and purchase options, variable payments that depend on an index or rate and certain transition adjustments, among other things. On July, 31, 2018, the FASB issued ASU 2018-11, Codification Improvements to Topic 842, Leases, which provides entities with an additional (and optional) transition method to adopt the new leases standard. Under this new transition method, an entity initially applies the new leases standard at the adoption date and recognizes a cumulative effect adjustment to the opening balance of retained earnings in the period of adoption.

The Company adopted all of the ASU's related to ASC 842 effective January 1, 2019. The Company applied a modified retrospective transition approach. The Company did not elect the practical expedient (1) to reassess the lease classification for any expired or existing leases; (2) to reassess whether any expired or existing contracts are or contain leases and (3) to reassess initial direct costs. The Company elected the hindsight practical expedient to determine the reasonably certain lease term for existing leases and to assess the impairment of its right-of-use assets. While lease classification remained unchanged, hindsight resulted in generally shorter accounting lease terms and useful lives of the corresponding right of use assets. The hindsight analysis also resulted in an approximate negative impact on beginning retained earnings of $7,000, related to the impairment of a right-of-use asset at the Company's New Orleans facility. The Company elected the transitional practical expedient for existing or expired land easements, allowing the Company to elect not to assess whether those land easements are, or contain, leases in accordance with ASC 842. The Company also elected the practical expedient to adjust the carrying amount of the right-of-use assets for the unfavorable lease liability previously recognized on the balance sheet. Additionally, the Company made an accounting policy election that keeps leases with an initial term of 12 months or less off of the balance sheet and resulted in recognizing those lease payments in the Condensed Consolidated Statements of Operations on a straight-line basis over the lease term. Refer to "Note 9 - Leases" for further detail.

On August 28, 2017, the FASB issued ASU 2017-12, which amends the hedge accounting recognition and presentation requirements in ASC 815 to (1) improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities and (2) reduce the complexity of and simplify the application of hedge accounting by preparers. For public business entities, the amendments in ASU 2017-12 are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company believes that the ASU 2017-12 will allow more of its derivative contracts to qualify for hedge accounting elections. The Company adopted ASU 2017-12 effective January 1, 2019, and changes in fair value of derivatives continue to be recognized in current period earnings for the three months ended March 31, 2019.

On November 7, 2018, the FASB issued ASU 2018-16, which permits entities to use the Overnight Index Swap ("OIS") Rate based on Secured Overnight Financing Rate ("SOFR") as an eligible benchmark interest rate during the early stages of the transition from LIBOR to SOFR. For public business entities, the amendments in ASU 2018-16 are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. The Company's adoption of ASU 2018-16 did not have a material impact on its consolidated financial statements.

On June 16, 2016, the FASB issued ASU 2016-13, which amends the Board's guidance on the impairment of financial instruments. The ASU 2016-13 adds to U.S. GAAP an impairment model (known as the current expected credit loss (CECL) model) that is based on expected losses rather than incurred losses. Under this new guidance, an entity recognizes as an allowance its estimate of expected credit losses. For public companies, the ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is evaluating the impact of this guidance, but does not expect it to have any material impact on its consolidated financial statements.

On August 28, 2018, the FASB issued ASU 2018-13, which changes the fair value measurement disclosure requirements of ASC 820. ASU 2018-13 eliminates or modifies certain disclosure requirements of ASC 820 and requires new disclosures relating to changes in unrealized gains or losses included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the applicable reporting period. ASU 2018-13 also explicitly requires entities to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU 2018-13 is effective for all entities for fiscal years beginning after December 15, 2019, including interim periods therein. The Company is evaluating the impact of this guidance on its consolidated financial statements, but does not expect the impact to be significant.

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Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Restricted Cash

See the table below for reconciliation of "Cash, Cash Equivalents and Restricted Cash" in regards to the Condensed Consolidated Statements of Cash Flows:

	March 31, 2019		March 31, 2018
Cash and cash equivalents	$	123,062	$	69,290
Restricted cash	3,000		—
Total cash, cash equivalents and restricted cash in the Condensed Statements of Cash Flows	$	126,062	$	69,290

Disaggregation of Revenue

The following table depicts the disaggregation of revenue according to product line and segment:

	Reportable Segments
Three months ended March 31, 2019	Biomass-based Diesel		Services		Corporate and other		Intersegment Revenues			Consolidated Total
Biomass-based diesel sales, net of BTC related amount due to customers of $0	$	399,632	$	—	$	—	$	(85,520	)	$	314,112
Petroleum diesel sales	—		—		83,903		—			83,903
Other biomass-based diesel revenue	57,191		—		—		—			57,191
Separated RIN sales	22,463		—		—		—			22,463
Other revenues	—		19,583		—		(19,511		)	72
Total revenues from contracts with customers	$	479,286	$	19,583	$	83,903	$	(105,031	)	$	477,741
Biomass-based diesel government incentives	468		—		—		—			468
Total revenues	$	479,754	$	19,583	$	83,903	$	(105,031	)	$	478,209
Three months ended March 31, 2018	Biomass-based Diesel		Services		Corporate and other		Intersegment Revenues			Consolidated Total
Biomass-based diesel sales, net of BTC related amount due to customers of $144,944	$	166,191	$	—	$	3,579	$	(17,683	)	$	152,087
Petroleum diesel sales	—		—		70,964		—			70,964
Other biomass-based diesel revenue	51,710		—		—		—			51,710
Separated RIN sales	47,179		—		—		—			47,179
Other revenues	—		35,215		—		(34,438		)	777
Total revenues from contracts with customers	$	265,080	$	35,215	$	74,543	$	(52,121	)	$	322,717
Biomass-based diesel government incentives	365,285		—		—		—			365,285
Total revenues	$	630,365	$	35,215	$	74,543	$	(52,121	)	$	688,002

Contract Balances

Significant changes to the contract liabilities during the three months ended March 31, 2019 and 2018 are as follows:

	January 1, 2019		Cash receipts (Payments)		Less: Impact on Revenue			Other		March 31, 2019
Deferred revenue	$	300	$	28,658	$	15,643		$	—	$	13,315
	January 1, 2018		Cash receipts (Payments)		Less: Impact on Revenue			Other		March 31, 2018
Deferred revenue	$	2,218	$	10,507	$	10,985		$	—	$	1,740
Payables to customers related to BTC	—		—		(144,944		)	5,832		150,776
	$	2,218	$	10,507	$	(133,959	)	$	5,832	$	152,516

The following table provides information about receivables and contract liabilities from contracts with customers:

	March 31, 2019			December 31, 2018
Accounts receivable	$	104,989		$	74,551
Short-term contract liabilities (deferred revenue)	$	(13,315	)	$	(300	)

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Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

The following table summarizes the Company's investments in marketable securities:

	March 31, 2019
	Maturity	Gross Amortized Cost		Total Unrealized Gains		Total Unrealized Losses			Fair Value
Commercial paper	Within one year	$	8,485	$	—	$	(1	)	$	8,484
Corporate bonds	Within one year	8,998		—		—			8,998
Total		$	17,483	$	—	$	(1	)	$	17,482

	December 31, 2018
	Maturity	Gross Amortized Cost		Total Unrealized Gains		Total Unrealized Losses			Fair Value
Commercial paper	Within one year	$	22,886	$	—	$	(14	)	$	22,872
Corporate bonds	Within one year	28,074		—		(14		)	28,060
Total		$	50,960	$	—	$	(28	)	$	50,932

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Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories consist of the following:

	March 31, 2019		December 31, 2018
Raw materials	$	62,319	$	40,348
Work in process	3,967		3,840
Finished goods	154,280		124,712
Total	$	220,566	$	168,900

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Discontinued Operations (Tables)

3 Months Ended

Mar. 31, 2019

Discontinued Operations and Disposal Groups [Abstract]

Loss on Discontinued Operations and Balance Sheet Reconciliation

Loss on Discontinued Operations:

	For the three months ended March 31,
	2019			2018
Other revenues	$	1,786		$	1,250
Other costs of goods sold	(2,200		)	(1,138		)
Research and development expense	(1,598		)	(5,564		)
Other income (expense), net	(5		)	1,997
Pre-tax loss from discontinued operations	(2,017		)	(3,455		)
Income tax expense	—			—
Loss on discontinued operations	$	(2,017	)	$	(3,455	)

Reconciliation of the Carrying Amounts of Major Classes of Assets and Liabilities Included in Assets and Liabilities Held for Sale:

	March 31, 2019			December 31, 2018
Machinery and equipment, net	$	824		$	824
In-process research and development	13,652			13,652
Impairment recognized on assets classified as held for sale	(11,226		)	(11,226		)
Total assets classified as held for sale	$	3,250		$	3,250

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Other Assets (Tables)

3 Months Ended

Mar. 31, 2019

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Summary of Prepaid Expense and Other Assets

Prepaid expense and other assets consist of the following:

	March 31, 2019		December 31, 2018
Commodity derivatives and related collateral, net	$	7,367	$	13,799
Prepaid expenses	15,264		17,187
Deposits	1,963		2,123
RIN inventory	3,061		2,000
Taxes receivable	2,365		2,991
Other	3,381		3,069
Total	$	33,401	$	41,169

Summary of Other Noncurrent Assets

Other noncurrent assets consist of the following:

	March 31, 2019		December 31, 2018
Investments	$	13,199	$	13,053
Spare parts inventory	2,680		2,680
Catalysts	1,810		1,989
Deposits	381		381
Other	2,607		3,167
Total	$	20,677	$	21,270

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Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Components of Intangible assets

Intangible assets consist of the following:

	March 31, 2019
	Cost		Accumulated Amortization			Net
Raw material supply agreement	$	6,230	$	(2,986	)	$	3,244
Renewable diesel technology	8,300		(2,674		)	5,626
Ground lease	200		(160		)	40
Acquired customer relationships	4,747		(1,049		)	3,698
Trademarks	704		—			704
Total intangible assets	$	20,181	$	(6,869	)	$	13,312

	December 31, 2018
	Cost		Accumulated Amortization			Net
Raw material supply agreement	$	6,230	$	(2,866	)	$	3,364
Renewable diesel technology	8,300		(2,536		)	5,764
Ground lease	200		(157		)	43
Acquired customer relationships	4,747		(976		)	3,771
Trademarks	704		—			704
Total intangible assets	$	20,181	$	(6,535	)	$	13,646

Estimated Amortization Expense

The estimated intangible asset amortization expense for the remainder of 2019 through 2024 and thereafter is as follows:

April 1, 2019 through December 31, 2019	$	1,451
2020	1,672
2021	1,678
2022	1,671
2023	1,678
2024	1,685
2025 and thereafter	3,477
Total	$	13,312

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Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Company's Borrowings

The following table shows the Company’s term debt:

	March 31, 2019		December 31, 2018
4.00% Convertible Senior Notes, $96,300 face amount, due in June 2036	$	75,940	$	75,477
2.75% Convertible Senior Notes, $67,380 face amount, due in June 2019	66,849		66,361
REG Danville term loan, secured, variable interest rate of LIBOR plus 4%, due in July 2022	8,548		8,964
REG Ralston term loan, variable interest rate of Prime Rate plus 2.25%, due in October 2025	18,035		18,948
REG Grays Harbor term loan, variable interest of minimum of 3.5% or Prime Rate plus 0.25%, due in May 2022	8,521		8,828
REG Capital term loan, fixed interest rate of 3.99%, due in January 2028	7,121		7,185
Other	47		54
Total term debt before debt issuance costs	185,061		185,817
Less: Current portion of long-term debt	150,339		149,006
Less: Debt issuance costs (net of accumulated amortization of $4,047 and $3,813, respectively)	3,217		3,390
Total long-term debt	$	31,505	$	33,421

Revolving Line of Credit

The following table shows the Company's lines of credit:

	March 31, 2019		December 31, 2018
Amount outstanding under lines of credit	$	102,612	$	14,250
Maximum available to be borrowed under lines of credit	$	58,348	$	114,889

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Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Derivative Financial Instruments by Balance Sheet Location

The following table sets forth the fair value of the Company's commodity contract derivatives and amounts that offset within the Condensed Consolidated Balance Sheets:

	March 31, 2019						December 31, 2018
	Assets			Liabilities			Assets			Liabilities
Gross amounts of derivatives recognized at fair value	$	3,899		$	1,019		$	11,843		$	1,799
Cash collateral	4,487			—			3,755			—
Total gross amount recognized	8,386			1,019			15,598			1,799
Gross amounts offset	(1,019		)	(1,019		)	(1,799		)	(1,799		)
Net amount reported in the condensed consolidated balance sheets	$	7,367		$	—		$	13,799		$	—

Summary of Derivative Financial Instruments by Location of Gain (Loss)

The following table sets forth the commodity contract derivatives gains and (losses) included in the Condensed Consolidated Statements of Operations:

	Location of Gain (Loss) Recognized in income	Three Months   Ended   March 31,   2019			Three Months   Ended   March 31,   2018
Commodity derivatives	Cost of goods sold – Biomass-based diesel	$	(22,739	)	$	(2,438	)

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Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases, Operating [Abstract]

Lease Expense and Effect on Cash Flows

The following table summarizes information about the Company's lease expense for the three months ended March 31, 2019:

	2019
Lease expense:
Operating lease expense	$	5,473
Variable lease expenses	1,764
Short-term and other lease expenses	426
Total lease expense	$	7,663

Schedule of Maturities of Operating Leases

For each of the next five calendar years and thereafter, future minimum lease payments and scheduled maturities under operating leases that have initial or remaining noncancelable lease terms in excess of one year are as follows:

	Total payments		Less: Discount		Operating lease obligation
April 1, 2019 through December 31, 2019	$	14,830	$	1,667	$	13,163
2020	15,107		1,565		13,542
2021	11,362		1,003		10,359
2022	3,525		675		2,850
2023	2,759		552		2,207
2024	1,713		472		1,241
2025 and thereafter	11,510		2,383		9,127
Total	$	60,806	$	8,317	$	52,489

Future minimum lease payments under operating leases

As the Company has not restated prior-year information for its adoption of ASC Topic 842, the following presents the Company's future minimum lease payments for operating leases under ASC Topic 840 at December 31, 2018:

	Total Payments
2019	$	20,326
2020	14,063
2021	10,643
2022	3,162
2023	2,406
Thereafter	13,736
Total minimum payments	$	64,336

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Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Assets (Liabilities) Measured at Fair Value

A summary of assets (liabilities) measured at fair value is as follows:

	As of March 31, 2019
	Total			Level 1		Level 2		Level 3
Commercial paper	$	8,484		$	—	$	8,484	$	—
Corporate bonds	$	8,998		—		8,998		—
Commodity contract derivatives	$	2,880		508		2,372		—
Contingent considerations for acquisitions	$	(6,849	)	—		—		(6,849		)
	$	13,513		$	508	$	19,854	$	(6,849	)

	As of December 31, 2018
	Total			Level 1		Level 2		Level 3
Commercial paper	$	22,872		$	—	$	22,872	$	—
Corporate bonds	$	28,060		—		28,060		—
Commodity contract derivatives	$	10,044		499		9,545		—
Contingent considerations for acquisitions	$	(9,861	)	—		—		(9,861		)
	$	51,115		$	499	$	60,477	$	(9,861	)

Liabilities Measured at Fair Value on a Recurring Basis

The following is a reconciliation of the beginning and ending balances for liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):

	Contingent Consideration for Acquisitions
	2019			2018
Balance at beginning of period, January 1	$	9,861		$	20,485
Change in estimates included in earnings	304			459
Settlements	(3,316		)	(2,813		)
Balance at end of period, March 31	$	6,849		$	18,131

Estimated Fair Values of the Company's Financial Instruments

The estimated fair values of the Company’s financial instruments, which are not recorded at fair value, are as follows:

	As of March 31, 2019						As of December 31, 2018
	Asset (Liability) Carrying Amount			Fair Value			Asset (Liability) Carrying Amount			Fair Value
Financial liabilities:
Debt and lines of credit	$	(287,673	)	$	(450,946	)	$	(200,067	)	$	(410,564	)

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Net Income (Loss) Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Potentially Dilutive Weighted Average Securities Excluded From the Calculation of Diluted Net Income (Loss) Per Share Attributable to Common Stockholders

The following potentially dilutive weighted average securities were excluded from the calculation of diluted net income (loss) per share attributable to common stockholders during the periods presented, as the effect was anti-dilutive:

	Three Months   Ended   March 31,   2019	Three Months   Ended   March 31,   2018
Stock appreciation rights	1,012,097	1,006,849
2019 Convertible Senior Notes	2,624,215	5,377,690
2036 Convertible Senior Notes	3,737,641	13,545,060
Total	7,373,953	19,929,599

Calculation of Diluted Net Income (Loss) Per Share

The following table presents the calculation of diluted net income (loss) per share attributable to common stockholders:

	Three Months   Ended   March 31,   2019			Three Months   Ended   March 31,   2018
Net income (loss) from continuing operations attributable to the Company’s common stockholders - Basic	$	(41,387	)	$	212,608
Plus (less): effect of participating securities	—			5,236
Net income (loss) attributable to common stockholders	(41,387		)	217,844
Less: effect of participating securities	—			(5,236		)
Net income (loss) from continuing operations attributable to the Company's common stockholders - Diluted	$	(41,387	)	$	212,608
Net loss from discontinued operations attributable to the Company's common stockholders - Basic and Diluted	$	(2,017	)	$	(3,455	)
Net income (loss) attributable to the Company's common stockholders - Basic	$	(43,404	)	$	209,238
Plus (less): effect of participating securities	—			5,151
Net income (loss) attributable to common stockholders	(43,404		)	214,389
Less: effect of participating securities	—			(5,151		)
Net income (loss) attributable to the Company's common stockholders - Diluted	$	(43,404	)	$	209,238
Shares:
Weighted-average shares used to compute basic net income (loss) per share	37,353,352			38,819,443
Adjustment to reflect conversion of convertible notes	—			561,665
Adjustment to reflect stock appreciation right conversions	—			102,979
Weighted-average shares used to compute diluted net income (loss) per share	37,353,352			39,484,087
Net income (loss) per share attributable to common stockholders - Diluted
Continuing operations	$	(1.11	)	$	5.38
Discontinued operations	$	(0.05	)	$	(0.09	)
Diluted net income (loss)	$	(1.16	)	$	5.30

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Reportable Segments and Geographic Information (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Schedule of Significant Items by Reportable Segment

The following table represents the significant items by reportable segment:

	Three Months   Ended   March 31,   2019			Three Months   Ended   March 31,   2018
Net sales from continuing operations:
Biomass-based Diesel	$	479,754		$	630,365
Services	19,583			35,215
Corporate and Other	83,903			74,543
Intersegment revenues	(105,031		)	(52,121		)
	$	478,209		$	688,002
Income (loss) from continuing operations before income taxes:
Biomass-based Diesel	$	(40,278	)	$	215,529
Services	(869		)	5,024
Corporate and Other	(670		)	(3,914		)
	$	(41,817	)	$	216,639
Depreciation and amortization expense, net:
Biomass-based Diesel	$	12,024		$	8,037
Services	630			329
Corporate and Other	886			741
	$	13,540		$	9,107
Cash paid for purchases of property, plant and equipment:
Biomass-based Diesel	$	7,688		$	15,603
Services	547			851
Corporate and Other	—			33
	$	8,235		$	16,487

	March 31, 2019			December 31, 2018
Goodwill:
Services	$	16,080		$	16,080
Assets:
Biomass-based Diesel	$	1,026,539		$	914,843
Services	55,926			63,720
Corporate and Other	407,564			379,658
Intersegment eliminations	(306,880		)	(254,375		)
Assets held for sale	3,250			3,250
	$	1,186,399		$	1,107,096

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas

The following geographic data include net sales attributed to the countries based on the location of the subsidiary making the sale and long-lived assets based on physical location. Long-lived assets represent the net book value of property, plant and equipment.

	Three Months   Ended   March 31,   2019		Three Months   Ended   March 31,   2018
Net revenues:
United States	$	438,605	$	639,674
Germany	39,468		46,356
Other Foreign	136		1,972
Non-United States	39,604		48,328
	$	478,209	$	688,002

	March 31, 2019		December 31, 2018
Long-lived assets:
United States	$	569,474	$	571,045
Germany	18,331		18,972
Other Foreign	666		706
	$	588,471	$	590,723

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Basis of Presentation and Nature of the Business (Details) gal in Millions	3 Months Ended
	Mar. 31, 2019 facility gal
Class of Stock [Line Items]
Number of biorefineries	14
Number of operating biomass-based diesel production facilities	13
Production capacity per year | gal	520
Number of fermentation facilities	1
Number of multi-feedstock capable plants	10
North America
Class of Stock [Line Items]
Number of biorefineries	12
Europe
Class of Stock [Line Items]
Number of biorefineries	2

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Summary of Significant Accounting Policies (Details Textual)		3 Months Ended		12 Months Ended
	Jun. 02, 2016 USD ($)	Mar. 31, 2019 USD ($) renewable_identification_number	Mar. 31, 2018 USD ($) shares	Dec. 31, 2018 USD ($)	Dec. 31, 2016	Jan. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2014 USD ($)
Business Acquisition [Line Items]
Stock Repurchased During Period, Shares | shares			641,601
Restricted cash		$ 3,000,000	$ 0	$ 3,000,000
Biomass-based diesel government incentives		468,000	365,285,000
Shares covered by rebalancing call options					100.00%
Retained earnings		(377,324,000)		(427,244,000)
Accounting Standards Update 2016-02
Business Acquisition [Line Items]
Retained earnings							$ 7,000,000
December 2017 Program
Business Acquisition [Line Items]
Stock Repurchased During Period, Value			7,828,000
Security repurchase program, amount authorized to be repurchased									$ 75,000,000
June 2018 Program
Business Acquisition [Line Items]
Security repurchase program, amount authorized to be repurchased								$ 75,000,000
January 2019 Program
Business Acquisition [Line Items]
Security repurchase program, amount authorized to be repurchased						$ 75,000,000
2036 Senior Convertible Notes Repurchases | Convertible Notes
Business Acquisition [Line Items]
Face amount	$ 152,000,000									$ 152,000,000
Interest rate	4.00%									4.00%
Convertible Notes Repurchases	$ 147,118,000
Principal amount of debt repurchased		$ 0	0
2019 Senior Convertible Notes | Convertible Notes
Business Acquisition [Line Items]
Face amount											$ 143,800,000
Interest rate		2.75%									2.75%
Convertible Notes Repurchases		$ 6,689,000	6,689,000
Principal amount of debt repurchased		$ 6,311,000	$ 6,311,000	$ 6,311,000
Minimum
Business Acquisition [Line Items]
RINs per gallon | renewable_identification_number		1.5
Allowed RINs per gallon | renewable_identification_number		0
Maximum
Business Acquisition [Line Items]
RINs per gallon | renewable_identification_number		1.7
Allowed RINs per gallon | renewable_identification_number		2.5

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Summary of Significant Accounting Policies (Restricted Cash) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Cash and cash equivalents	$ 123,062	$ 123,575	$ 69,290
Restricted cash	3,000	3,000	0
Total cash, cash equivalents and restricted cash in the Condensed Statements of Cash Flows	$ 126,062	$ 126,575	$ 69,290	$ 77,627

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Summary of Significant Accounting Policies (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	$ 477,741	$ 322,717
Biomass-based diesel government incentives	468	365,285
Total revenues	478,209	688,002
Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	479,286	265,080
Biomass-based diesel government incentives	468	365,285
Total revenues	479,754	630,365
Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	19,583	35,215
Biomass-based diesel government incentives	0	0
Total revenues	19,583	35,215
Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	83,903	74,543
Biomass-based diesel government incentives	0	0
Total revenues	83,903	74,543
Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	(105,031)	(52,121)
Biomass-based diesel government incentives	0	0
Total revenues	(105,031)	(52,121)
Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	314,112	152,087
Biomass-based Diesel | Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	399,632	166,191
BTC due to customers	0	144,944
Biomass-based Diesel | Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Biomass-based Diesel | Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	3,579
Biomass-based Diesel | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	(85,520)	(17,683)
Petroleum diesel sales
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	83,903	70,964
Petroleum diesel sales | Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Petroleum diesel sales | Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Petroleum diesel sales | Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	83,903	70,964
Petroleum diesel sales | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Other biomass-based diesel revenue
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	57,191	51,710
Other biomass-based diesel revenue | Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	57,191	51,710
Other biomass-based diesel revenue | Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Other biomass-based diesel revenue | Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Other biomass-based diesel revenue | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Separated RIN sales
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	22,463	47,179
Separated RIN sales | Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	22,463	47,179
Separated RIN sales | Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Separated RIN sales | Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Separated RIN sales | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Other revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	72	777
Other revenues | Biomass-based Diesel
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Other revenues | Services
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	19,583	35,215
Other revenues | Corporate and other
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	0	0
Other revenues | Intersegment Revenues
Disaggregation of Revenue [Line Items]
Total revenues from contracts with customers	$ (19,511)	$ (34,438)

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Summary of Significant Accounting Policies (Contract Balances) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Accounts receivable	$ 104,989	$ 74,551
Short-term contract liabilities (deferred revenue)	$ (13,315)	$ (300)

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Summary of Significant Accounting Policies (Significant Changes in Contract Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Deferred revenue
Beginning Balance	$ 300	$ 2,218
Cash receipts (Payments)	28,658	10,507
Less: Impact on Revenue	15,643	10,985
Other	0	0
Ending Balance	$ 13,315	1,740
Payables to customers related to BTC
Beginning Balance		0
Cash receipts (Payments)		0
Less: Impact on Revenue		(144,944)
Other		5,832
Ending Balance		150,776
Total
Beginning Balance		2,218
Cash receipts (Payments)		10,507
Less: Impact on Revenue		(133,959)
Other		5,832
Ending Balance		$ 152,516

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Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Marketable Securities [Line Items]
Gross Amortized Cost	$ 17,483	$ 50,960
Total Unrealized Gains	0	0
Total Unrealized Losses	(1)	(28)
Fair Value	17,482	50,932
Commercial paper
Marketable Securities [Line Items]
Gross Amortized Cost	8,485	22,886
Total Unrealized Gains	0	0
Total Unrealized Losses	(1)	(14)
Fair Value	8,484	22,872
Corporate bonds
Marketable Securities [Line Items]
Gross Amortized Cost	8,998	28,074
Total Unrealized Gains	0	0
Total Unrealized Losses	0	(14)
Fair Value	$ 8,998	$ 28,060

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Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Inventories
Raw materials	$ 62,319	$ 40,348
Work in process	3,967	3,840
Finished goods	154,280	124,712
Total	$ 220,566	$ 168,900

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Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax loss from discontinued operations	$ (2,017)	$ (3,455)
Loss on discontinued operations	(2,017)	(3,455)
REG Life Sciences | Assets held for sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment loss			$ (11,226)
Other revenues	1,786	1,250
Other costs of goods sold	(2,200)	(1,138)
Research and development expense	(1,598)	(5,564)
Other income (expense), net	(5)	1,997
Pre-tax loss from discontinued operations	(2,017)	(3,455)
Income tax expense	0	0
Loss on discontinued operations	(2,017)	$ (3,455)
Machinery and equipment, net	824		824
In-process research and development	13,652		13,652
Impairment recognized on assets classified as held for sale	(11,226)		(11,226)
Total assets classified as held for sale	$ 3,250		$ 3,250

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Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Summary of prepaid expense and other assets
Commodity derivatives and related collateral, net	$ 7,367	$ 13,799
Prepaid expenses	15,264	17,187
Deposits	1,963	2,123
RIN inventory	3,061	2,000
Taxes receivable	2,365	2,991
Other	3,381	3,069
Total	$ 33,401	$ 41,169

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Other Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
RIN
Inventory [Line Items]
Inventory adjustment	$ 0	$ 630

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Other Assets (Details 1) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Cost Method Investments	$ 13,199	$ 13,053
Spare parts inventory	2,680	2,680
Catalysts	1,810	1,989
Deposits	381	381
Other	2,607	3,167
Total	$ 20,677	$ 21,270

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Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Cost	$ 20,181	$ 20,181
Accumulated Amortization	(6,869)	(6,535)
Net	13,312	13,646
Raw material supply agreement
Finite-Lived Intangible Assets [Line Items]
Cost	6,230	6,230
Accumulated Amortization	(2,986)	(2,866)
Net	3,244	3,364
Renewable diesel technology
Finite-Lived Intangible Assets [Line Items]
Cost	8,300	8,300
Accumulated Amortization	(2,674)	(2,536)
Net	5,626	5,764
Ground lease
Finite-Lived Intangible Assets [Line Items]
Cost	200	200
Accumulated Amortization	(160)	(157)
Net	40	43
Acquired customer relationships
Finite-Lived Intangible Assets [Line Items]
Cost	4,747	4,747
Accumulated Amortization	(1,049)	(976)
Net	3,698	3,771
Trademarks
Finite-Lived Intangible Assets [Line Items]
Cost	704	704
Accumulated Amortization	0	0
Net	$ 704	$ 704

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Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible amortization expense	$ 334	$ 324

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Intangible Assets (Details 1) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Estimated amortization expense
April 1, 2019 through December 31, 2019	$ 1,451
2019	1,672
2020	1,678
2021	1,671
2022	1,678
2023	1,685
2025 and thereafter	3,477
Net	$ 13,312	$ 13,646

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Debt (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Accumulated amortization on debt issuance costs	$ 4,047,000	$ 3,813,000
Company's borrowings
Total term debt before debt issuance costs	185,061,000	185,817,000
Less: Current portion of long-term debt	150,339,000	149,006,000
Less: Debt issuance costs (net of accumulated amortization of $4,047 and $3,813, respectively)	3,217,000	3,390,000
Total long-term debt	$ 31,505,000	33,421,000
4.00% Convertible Senior Notes
Line of Credit Facility [Line Items]
Interest rate	4.00%
Face amount	$ 96,300,000
Company's borrowings
Total term debt before debt issuance costs	$ 75,940,000	75,477,000
2.75% Convertible Senior Notes
Line of Credit Facility [Line Items]
Interest rate	2.75%
Face amount	$ 67,380,000
Company's borrowings
Total term debt before debt issuance costs	$ 66,849,000	66,361,000
REG Danville term loan
Line of Credit Facility [Line Items]
Description of variable rate basis	LIBOR plus 4% per annum
Company's borrowings
Total term debt before debt issuance costs	$ 8,548,000	8,964,000
REG Danville term loan | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	4.00%
REG Newton term loan
Line of Credit Facility [Line Items]
Description of variable rate basis	LIBOR plus 4% per annum
REG Newton term loan | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	4.00%
REG Ralston term loan
Line of Credit Facility [Line Items]
Description of variable rate basis	Prime Rate plus 2.25%
Company's borrowings
Total term debt before debt issuance costs	$ 18,035,000	18,948,000
REG Ralston term loan | Prime Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.25%
REG Mason City term loan
Line of Credit Facility [Line Items]
Interest rate	5.00%
REG Grays Harbor term loan
Line of Credit Facility [Line Items]
Description of variable rate basis	Prime Rate plus 0.25%
Basis spread on variable rate	3.50%
Company's borrowings
Total term debt before debt issuance costs	$ 8,521,000	8,828,000
REG Grays Harbor term loan | Prime Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.25%
REG Capital term loan
Line of Credit Facility [Line Items]
Interest rate	3.99%
Company's borrowings
Total term debt before debt issuance costs	$ 7,121,000	7,185,000
Other
Company's borrowings
Total term debt before debt issuance costs	$ 47,000	$ 54,000

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Debt (Details Textual)		1 Months Ended	3 Months Ended		12 Months Ended
	Jun. 02, 2016 USD ($) d $ / shares	Jun. 30, 2014 USD ($) $ / shares	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2016 USD ($)
Debt Instrument [Line Items]
Debt liability component			$ 185,061,000		$ 185,817,000
Convertible Notes | 2019 Convertible Notes [Member]
Debt Instrument [Line Items]
Face amount		$ 143,800,000
Interest rate		2.75%	2.75%
Initial conversion rate		75.3963
Initial conversion price (in dollars per share) | $ / shares		$ 13.26
Principal amount of debt repurchased			$ 6,311,000	$ 6,311,000	6,311,000
Net proceeds from debt issuance			6,689,000	6,689,000
Convertible Notes | 2036 Senior Convertible Notes Repurchases
Debt Instrument [Line Items]
Face amount	$ 152,000,000					$ 152,000,000
Interest rate	4.00%					4.00%
Percentage of convertible senior notes principal required for repurchase	100.00%
Initial conversion rate	92.8074
Initial conversion price (in dollars per share) | $ / shares	$ 10.78
Principal amount of debt repurchased			0	$ 0
Convertible debt instrument, closing price minimum | $ / shares	$ 14.01
Convertible debt instrument, threshold percentage of stock price trigger	130.00%
Convertible debt instrument, threshold trading days | d	20
Convertible debt instrument, threshold consecutive trading days | d	30
Net proceeds from debt issuance	$ 147,118,000
Fees and offering expenses	$ 4,882,000
Effective interest rate	2.45%
Convertible Notes
Debt Instrument [Line Items]
Face amount			$ 67,380,000
Interest rate			2.75%
Debt liability component			$ 66,849,000		66,361,000
REG Ralston term loan
Debt Instrument [Line Items]
Debt liability component			$ 18,035,000		18,948,000
REG Ralston term loan | Prime Rate
Debt Instrument [Line Items]
Basis spread on variable rate			2.25%
REG Danville
Debt Instrument [Line Items]
Debt liability component			$ 8,548,000		8,964,000
REG Danville | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			4.00%
REG Capital term loan
Debt Instrument [Line Items]
Interest rate			3.99%
Debt liability component			$ 7,121,000		$ 7,185,000
BNP Master Banking Facility Agreement
Debt Instrument [Line Items]
Line of credit			$ 25,000,000
BNP Master Banking Facility Agreement | Minimum
Debt Instrument [Line Items]
Effective interest rate			1.50%
BNP Master Banking Facility Agreement | Maximum
Debt Instrument [Line Items]
Effective interest rate			4.39%
Wells Fargo Revolver
Debt Instrument [Line Items]
Additional Increase in maximum borrowing capacity			$ 150,000,000
Line of credit facility limitation amount			$ 40,000,000
Debt instrument, variable rate minimum			0.00%
Percentage required of total current revolving loan commitments			10.00%
Amount required of total current revolving loan commitments			$ 15,000,000
Wells Fargo Revolver | Minimum
Debt Instrument [Line Items]
LIBOR rate margin			1.75%
Fixed charge coverate ratio			1.0
Wells Fargo Revolver | Maximum
Debt Instrument [Line Items]
Line of credit facility limitation amount			$ 50,000,000
LIBOR rate margin			2.25%
Fixed charge coverate ratio			1.0

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Debt (Details 1) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Amount outstanding under lines of credit	$ 102,612	$ 14,250
Maximum available to be borrowed under lines of credit	$ 58,348	$ 114,889

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Derivative Instruments (Details Textual) lb in Millions, gal in Millions, BTU in Millions	3 Months Ended
	Mar. 31, 2019 BTU lb gal
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Heating oil covered under the open commodity derivative contracts (in gallons) | gal	92
Soybean oil covered under the open commodity derivative contracts (in pounds) | lb	76
Natural gas covered under the open commodity derivative contracts (in BTUs) | BTU	2

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Leases (Lease Expense) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating lease expense	$ 5,473
Variable lease expenses	1,764
Short-term and other lease expenses	426
Total lease expense	$ 7,663

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Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Gross amounts of derivatives recognized at fair value	$ 3,899	$ 11,843
Cash collateral	4,487	3,755
Total gross amount recognized	8,386	15,598
Gross amounts offset	(1,019)	(1,799)
Net amount reported in the condensed consolidated balance sheets	7,367	13,799
Liabilities
Gross amounts of derivatives recognized at fair value	1,019	1,799
Cash collateral	0	0
Total gross amount recognized	1,019	1,799
Gross amounts offset	(1,019)	(1,799)
Net amount reported in the condensed consolidated balance sheets	$ 0	$ 0

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Leases (Details Textual)	Mar. 31, 2019
Leases, Operating [Abstract]
Weighted average remaining lease term	5 years 9 months 22 days
Weighted average discount rate	4.85%

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Derivative Instruments (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cost of goods sold – Biomass-based diesel | Commodity derivatives
Derivative Instruments Gain Loss [Line Items]
Gains (losses) included in the condensed consolidated statement of operations	$ (22,739)	$ (2,438)

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Leases (Maturity) (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Total payments
April 1, 2019 through December 31, 2019	$ 14,830
2020	15,107
2021	11,362
2022	3,525
2023	2,759
2024	1,713
2025 and thereafter	11,510
Total	60,806
Less: Discount
April 1, 2019 through December 31, 2019	1,667
2020	1,565
2021	1,003
2022	675
2023	552
2024	472
2025 and thereafter	2,383
Total	8,317
Operating lease obligation
April 1, 2019 through December 31, 2019	13,163
2020	13,542
2021	10,359
2022	2,850
2023	2,207
2024	1,241
2025 and thereafter	9,127
Total	$ 52,489

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Leases (Future Minimum Payments) (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Leases [Abstract]
2019	$ 20,326
2020	14,063
2021	10,643
2022	3,162
2023	2,406
Thereafter	13,736
Total minimum payments	$ 64,336

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Fair Value Measurement (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	$ 13,513	$ 51,115
Level 1
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	508	499
Level 2
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	19,854	60,477
Level 3
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	(6,849)	(9,861)
Commercial paper
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	8,484	22,872
Commercial paper | Level 1
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	0	0
Commercial paper | Level 2
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	8,484	22,872
Commercial paper | Level 3
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	0	0
Corporate bonds
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	8,998	28,060
Corporate bonds | Level 1
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	0	0
Corporate bonds | Level 2
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	8,998	28,060
Corporate bonds | Level 3
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	0	0
Commodity contract derivatives
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	2,880	10,044
Commodity contract derivatives | Level 1
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	508	499
Commodity contract derivatives | Level 2
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	2,372	9,545
Commodity contract derivatives | Level 3
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	0	0
Contingent considerations for acquisitions
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	(6,849)	(9,861)
Contingent considerations for acquisitions | Level 1
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	0	0
Contingent considerations for acquisitions | Level 2
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	0	0
Contingent considerations for acquisitions | Level 3
Assets (liabilities) measured at fair value
Assets (liabilities), fair value	$ (6,849)	$ (9,861)

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Fair Value Measurement (Details 1) - Contingent considerations for acquisitions - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 9,861	$ 20,485
Change in estimates included in earnings	304	459
Settlements	(3,316)	(2,813)
Ending balance	$ 6,849	$ 18,131

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Fair Value Measurement (Details 2) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Asset (Liability) Carrying Amount
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt and lines of credit	$ (287,673)	$ (200,067)
Fair Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt and lines of credit	$ (450,946)	$ (410,564)

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Fair Value Measurement (Details Textual) - Discount Rate	Mar. 31, 2019
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value inputs, discount rate	5.80%
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value inputs, discount rate	12.50%

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Net Income (Loss) Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total (in shares)	7,373,953	19,929,599
2019 Convertible Senior Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total (in shares)	2,624,215	5,377,690
2036 Convertible Senior Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total (in shares)	3,737,641	13,545,060
Stock appreciation rights
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total (in shares)	1,012,097	1,006,849

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Net Income (Loss) Per Share (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income (loss) from continuing operations attributable to the Company’s common stockholders - Basic	$ (41,387)	$ 212,608
Plus (less): effect of participating securities	0	5,236
Net income (loss) attributable to common stockholders	(41,387)	217,844
Less: effect of participating securities	0	(5,236)
Net income (loss) from continuing operations attributable to the Company's common stockholders - Diluted	(41,387)	212,608
Net loss from discontinued operations attributable to the Company's common stockholders - Basic and Diluted	(2,017)	(3,455)
Net income (loss) attributable to the Company's common stockholders - Basic	(43,404)	209,238
Plus (less): effect of participating securities	0	5,151
Net income (loss) attributable to common stockholders	(43,404)	214,389
Less: effect of participating securities	0	(5,151)
Net income (loss) attributable to the Company's common stockholders - Diluted	$ (43,404)	$ 209,238
Shares:
Weighted-average shares used to compute basic net income (loss) per share (in shares)	37,353,352	38,819,443
Adjustment to reflect conversion of convertible notes (in shares)	0	561,665
Adjustment to reflect stock appreciation right conversions (in shares)	0	102,979
Weighted-average shares used to compute diluted net income (loss) per share (in shares)	37,353,352	39,484,087
Net income (loss) per share attributable to common stockholders - Diluted
Continuing operations (in dollars per share)	$ (1.11)	$ 5.38
Discontinued operations (in dollars per share)	(0.05)	(0.09)
Diluted net income (loss) (in dollars per share)	$ (1.16)	$ 5.30

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Reportable Segments and Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net revenues	$ 478,209	$ 688,002
Income (loss) before income taxes	(41,817)	216,639
Depreciation and amortization expense, net	13,540	9,107
Cash paid for purchases of property, plant and equipment	8,235	16,487
Goodwill	16,080		$ 16,080
Assets	1,186,399		1,107,096
Intersegment Revenues
Segment Reporting Information [Line Items]
Net revenues	(105,031)	(52,121)
Assets	(306,880)		(254,375)
Biomass-based Diesel
Segment Reporting Information [Line Items]
Net revenues	479,754	630,365
Biomass-based Diesel | Segments
Segment Reporting Information [Line Items]
Net revenues	479,754	630,365
Income (loss) before income taxes	(40,278)	215,529
Depreciation and amortization expense, net	12,024	8,037
Cash paid for purchases of property, plant and equipment	7,688	15,603
Assets	1,026,539		914,843
Services
Segment Reporting Information [Line Items]
Net revenues	19,583	35,215
Goodwill	16,080		16,080
Services | Segments
Segment Reporting Information [Line Items]
Net revenues	19,583	35,215
Income (loss) before income taxes	(869)	5,024
Depreciation and amortization expense, net	630	329
Cash paid for purchases of property, plant and equipment	547	851
Assets	55,926		63,720
Corporate and Other
Segment Reporting Information [Line Items]
Net revenues	83,903	74,543
Income (loss) before income taxes	(670)	(3,914)
Depreciation and amortization expense, net	886	741
Cash paid for purchases of property, plant and equipment	0	$ 33
Assets	407,564		379,658
Assets held for sale
Segment Reporting Information [Line Items]
Assets	$ 3,250		$ 3,250

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Reportable Segments and Geographic Information (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 478,209	$ 688,002
Long-lived assets	588,471		$ 590,723
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	438,605	639,674
Long-lived assets	569,474		571,045
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	39,468	46,356
Long-lived assets	18,331		18,972
Other Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	136	1,972
Long-lived assets	666		$ 706
Non-United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 39,604	$ 48,328

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Label	Element	Value
Accounting Standards Update 2016-02 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (6,516,000)
Accounting Standards Update 2016-02 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (6,516,000)