10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended March 31, 2022

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: 001-38090

SOLARIS OILFIELD INFRASTRUCTURE, INC.

(Exact name of registrant as specified in its charter)

Delaware	81-5223109
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
9811 Katy Freeway, Suite 700 Houston, Texas	77024
(Address of principal executive offices)	(Zip code)

(281) 501-3070

(Registrant’s telephone number, including area code)

(Former name, former address and former fiscal year, if changed since last report)

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Class A Common Stock, $0.01 par value	“SOI”	New York Stock Exchange

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 ☒ 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 ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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	☒
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 ☒

As of April 26, 2022, the registrant had 32,807,053 shares of Class A common stock, $0.01 par value per share, and 13,757,438 shares of Class B common stock, $0.00 par value per share, outstanding.

SOLARIS OILFIELD INFRASTRUCTURE, INC.

TABLE OF CONTENTS

		Page
Cautionary Statement Regarding Forward-Looking Statements		1
PART I: FINANCIAL INFORMATION		3
Item 1.	Financial Statements	3
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	15
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	19
Item 4.	Controls and Procedures	20
PART II: OTHER INFORMATION		21
Item 1.	Legal Proceedings	21
Item 1A.	Risk Factors	21
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	21
Item 3.	Defaults upon Senior Securities	21
Item 4.	Mine Safety Disclosures	21
Item 5.	Other Information	21
Item 6.	Exhibits	22
SIGNATURES		24

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q (the “Quarterly Report”) includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Statements that are predictive in nature, that depend upon or refer to future events or conditions or that include the words “believe,” “expect,” “anticipate,” “intend,” “estimate” and other expressions that are predictions of or indicate future events and trends and that do not relate to historical matters identify forward-looking statements. Our forward-looking statements include statements about our business strategy, our industry, our future profitability, expected capital expenditures and the impact of such expenditures on our performance, management changes, current and potential future long-term contracts and our future business and financial performance. In addition, our forward-looking statements address the various risks and uncertainties associated with the extraordinary market environment and impacts resulting from both the coronavirus 2019 (“COVID-19”) pandemic and the continued volatility in global oil markets, and the expected impact of these events on our businesses, operations, earnings and results.

A forward-looking statement may include a statement of the assumptions or bases underlying the forward-looking statement. We believe that we have chosen these assumptions or bases in good faith and that they are reasonable. You are cautioned not to place undue reliance on any forward-looking statements. You should also understand that it is not possible to predict or identify all such factors and should not consider the following list to be a complete statement of all potential risks and uncertainties. Factors that could cause our actual results to differ materially from the results contemplated by such forward-looking statements include:

● the level of domestic capital spending by the oil and natural gas industry and uncertainty regarding the future actions of oil producers;

● developments in the global economy and the resulting impacts to the demand and supply for oil and natural gas or volatility of oil and natural gas prices;

● operational and economic challenges relating to, and resulting from, the COVID-19 pandemic;

● uncertainty regarding the sustainability and extent of a continued economic recovery in the United States and elsewhere, which in turn will likely affect demand for crude oil and therefore the demand for the services we provide and the commercial opportunities available to us;

● Geopolitical risks, including the war in Ukraine, which could affect the stability and continued recovery of oil and gas markets;

● consolidation amongst current or potential customers that could affect demand for our products and services;

● inflationary risks, including changes in market price and availability of materials;

● significant changes in the transportation industries or fluctuations in transportation costs or the availability or reliability of transportation that service our business;

● large or multiple customer defaults, including defaults resulting from actual or potential insolvencies;

● technological advancements in well completion technologies and our ability to expand our product and service offerings;

● competitive conditions in our industry;

● inability to fully protect our intellectual property rights;

● actions taken by our customers, competitors and third-party operators;

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● changes in the availability and cost of capital;

● our ability to successfully implement our business strategy;

● changes in our tax status;

● the effects of existing and future laws and governmental regulations (or the interpretation thereof) on us and our customers;

● cyber-attacks targeting systems and infrastructure used by the oil and natural gas industry;

● the effects of future litigation;

● credit markets;

● business acquisitions;

● natural or man-made disasters and other external events that may disrupt our manufacturing operations;

● uncertainty regarding our future operating results;

● the impact of current and future laws, rulings, governmental regulations, accounting standards and statements, and related interpretations; and

● plans, objectives, expectations and intentions contained in this Quarterly Report that are not historical.

All forward-looking statements speak only as of the date of this Quarterly Report. You should not place undue reliance on our forward-looking statements. Although forward-looking statements reflect our good faith beliefs at the time they are made, forward-looking statements involve known and unknown risks, uncertainties and other factors, including the factors described under Item 1A, “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2021, this Quarterly Report and in our other filings with the United States Securities and Exchange Commission (the “SEC”), which may cause our actual results, performance or achievements to differ materially from anticipated future results, performance or achievements expressed or implied by such forward-looking statements. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events, changed circumstances or otherwise, unless required by law.

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PART 1: FINANCIAL INFORMATION

Item 1:     Financial Statements

SOLARIS OILFIELD INFRASTRUCTURE, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts)

(Unaudited)

	March 31,		December 31,
	2022		2021
Assets
Current assets:
Cash and cash equivalents	$	25,128	$	36,497
Accounts receivable, net of allowances for credit losses of $746 and $746, respectively		45,657		33,120
Prepaid expenses and other current assets		8,080		9,797
Inventories		2,136		1,654
Total current assets		81,001		81,068
Property, plant and equipment, net		247,622		240,091
Non-current inventories		2,769		2,676
Operating lease right-of-use assets		4,046		4,182
Goodwill		13,004		13,004
Intangible assets, net		2,008		2,203
Deferred tax assets		62,099		62,942
Other assets		352		57
Total assets	$	412,901	$	406,223
Liabilities and Stockholders' Equity
Current liabilities:
Accounts payable	$	17,240	$	9,927
Accrued liabilities		14,508		16,918
Current portion of payables related to Tax Receivable Agreement		1,210		1,210
Current portion of operating lease liabilities		729		717
Current portion of finance lease liabilities		31		31
Other current liabilities		250		496
Total current liabilities		33,968		29,299
Operating lease liabilities, net of current		6,559		6,702
Finance lease liabilities, net of current		62		70
Payables related to Tax Receivable Agreement		71,892		71,892
Other long-term liabilities		381		384
Total liabilities		112,862		108,347
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock, $0.01 par value, 50,000 shares authorized, none issued and outstanding		—		—
Class A common stock, $0.01 par value, 600,000 shares authorized, 31,416 shares issued and outstanding as of March 31, 2022 and 31,146 shares issued and outstanding as of December 31, 2021		314		312
Class B common stock, $0.00 par value, 180,000 shares authorized, 13,770 shares issued and outstanding as of March 31, 2022 and 13,770 issued and outstanding as of December 31, 2021		—		—
Additional paid-in capital		198,982		196,912
Retained earnings		5,598		5,925
Total stockholders' equity attributable to Solaris		204,894		203,149
Non-controlling interest		95,145		94,727
Total stockholders' equity		300,039		297,876
Total liabilities and stockholders' equity	$	412,901	$	406,223

The accompanying notes are an integral part of these condensed consolidated financial statements.

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SOLARIS OILFIELD INFRASTRUCTURE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except share and per share amounts)

(Unaudited)

	Three Months Ended
	March 31,
	2022		2021
Revenue		56,915		28,669
Operating costs and expenses:
Cost of services (exclusive of depreciation)		37,671		19,206
Depreciation and amortization		6,929		6,693
Selling, general and administrative		5,211		4,606
Other operating (income) expense		(309)		253
Total operating costs and expenses		49,502		30,758
Operating income (loss)		7,413		(2,089)
Interest expense, net		(79)		(49)
Total other expense (income)		(79)		(49)
Income (loss) before income tax expense		7,334		(2,138)
Income tax (expense) benefit		(1,612)		213
Net income (loss)		5,722		(1,925)
Less: net (income) loss related to non-controlling interests		(2,220)		756
Net income (loss) attributable to Solaris	$	3,502	$	(1,169)
Income (loss) per share of Class A common stock – basic	$	0.11	$	(0.04)
Income (loss) per share of Class A common stock – diluted	$	0.11	$	(0.04)
Basic weighted-average shares of Class A common stock outstanding		31,239		29,957
Diluted weighted-average shares of Class A common stock outstanding		31,239		29,957

]

The accompanying notes are an integral part of these condensed consolidated financial statements.

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SOLARIS OILFIELD INFRASTRUCTURE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

(In thousands)

(Unaudited)

	Three Months Ended March 31, 2022
	Class A			Class B			Additional							Non-		Total
	Common Stock			Common Stock			Paid-in		Retained		Treasury Stock			controlling		Stockholders'
	Shares	Amount		Shares	Amount		Capital		Earnings		Shares	Amount		Interest		Equity
Balance at January 1, 2022	31,146	$	312	13,770	$	—	$	196,912	$	5,925	—	$	—	$	94,727	$	297,876
Net effect of deferred tax asset and payables related to the vesting of restricted stock	—		—	—		—		610		—	—		—		—		610
Stock-based compensation	—		—	—		—		1,188		—	—		—		520		1,708
Vesting of restricted stock	366		3	—		—		574		—	—		—		(577)		—
Cancelled shares withheld for taxes from RSU vesting	(96)		(1)	—		—		(302)		(388)	—		—		(299)		(990)
Solaris LLC distribution paid to Solaris LLC unitholders (other than Solaris Inc.) at $0.105 per Solaris LLC Unit	—		—	—		—		—		—	—		—		(1,446)		(1,446)
Dividends paid ($0.105 per share of Class A common stock)	—		—	—		—		—		(3,441)	—		—		—		(3,441)
Net income	—		—	—		—		—		3,502	—		—		2,220		5,722
Balance at March 31, 2022	31,416		314	13,770		—		198,982		5,598	—		—		95,145		300,039

The accompanying notes are an integral part of these condensed consolidated financial statements.

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SOLARIS OILFIELD INFRASTRUCTURE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY

(In thousands)

(Unaudited)

	Three Months Ended March 31, 2021
	Class A			Class B			Additional							Non-		Total
	Common Stock			Common Stock			Paid-in		Retained		Treasury Stock			controlling		Stockholders'
	Shares	Amount		Shares	Amount		Capital		Earnings		Shares	Amount		Interest		Equity
Balance at January 1, 2021	28,943	$	290	15,685	$	—	$	180,415	$	20,549	—	$	—	$	114,225	$	315,479
Exchange of Solaris LLC Units and shares of Class B common stock for shares of Class A common stock	1,865		19	(1,865)		—		13,526		—	—		—		(13,545)		—
Net effect of deferred tax asset and payables related to Tax Receivable Agreement from the exchange of Solaris LLC Units and shares of Class B common stock for shares of Class A common stock and the vesting of restricted stock	—		—	—		—		(1,184)		—	—		—		—		(1,184)
Stock option exercises	4		—	—		—		18		—	—		—		(6)		12
Stock-based compensation	—		—	—		—		854		—	—		—		418		1,272
Vesting of restricted stock	223		2	—		—		407		—	—		—		(409)		—
Cancelled shares withheld for taxes from RSU vesting	(57)		(1)	—		—		(146)		(319)	—		—		(207)		(673)
Solaris LLC distribution paid to Solaris LLC unitholders (other than Solaris Inc.) at $0.105 per Solaris LLC Unit	—		—	—		—		—		—	—		—		(1,451)		(1,451)
Dividends paid ($0.105 per share of Class A common stock)	—		—	—		—		—		(3,346)	—		—		—		(3,346)
Net income (loss)	—		—	—		—		—		(1,169)	—		—		(756)		(1,925)
Balance at March 31, 2021	30,978		310	13,820		—		193,890		15,715	—		—		98,269		308,184

The accompanying notes are an integral part of these condensed consolidated financial statements.

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SOLARIS OILFIELD INFRASTRUCTURE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	For the Three Months Ended
	March 31,
	2022		2021
Cash flows from operating activities:
Net income (loss)	$	5,722	$	(1,925)
Adjustment to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization		6,929		6,693
Loss on disposal of assets		107		18
Allowance for credit losses		—		283
Stock-based compensation		1,593		1,199
Amortization of debt issuance costs		40		48
Deferred income tax benefit		1,455		(302)
Other		(1)		5
Changes in operating assets and liabilities:
Accounts receivable		(12,537)		(3,460)
Prepaid expenses and other assets		1,717		235
Inventories		(1,152)		(622)
Accounts payable		5,040		5,055
Accrued liabilities		(2,644)		(4,461)
Net cash provided by operating activities		6,269		2,766
Cash flows from investing activities:
Investment in property, plant and equipment		(11,776)		(2,647)
Cash received from insurance proceeds		231		—
Proceeds from disposal of assets		38		40
Net cash used in investing activities		(11,507)		(2,607)
Cash flows from financing activities:
Distribution and dividend paid to Solaris LLC unitholders (other than Solaris Inc.) and Class A common shareholders		(4,887)		(4,797)
Payments under finance leases		(8)		(7)
Payments under insurance premium financing		(246)		—
Proceeds from stock option exercises		—		12
Payments for shares withheld for taxes from RSU vesting and cancelled		(990)		(673)
Net cash used in financing activities		(6,131)		(5,465)
Net decrease in cash		(11,369)		(5,306)
Cash at beginning of period		36,497		60,366
Cash at end of period	$	25,128	$	55,060
Non-cash activities
Investing:
Capitalized depreciation in property, plant and equipment		146		143
Capitalized stock based compensation		115		73
Property and equipment additions incurred but not paid at period-end		2,827		604
Property, plant and equipment additions transferred from inventory		575		392
Cash paid for:
Interest		37		33
Income Taxes		22		—

The accompanying notes are an integral part of these condensed consolidated financial statements.

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SOLARIS OILFIELD INFRASTRUCTURE, INC.
Notes to the Condensed Consolidated Financial Statements
(Dollars in millions, except share data)

1.    Organization and Background of Business

Description of Business

We design and manufacture specialized equipment, which combined with field technician support, logistics services and our software solutions, enables us to provide a service offering that helps oil and natural gas operators and their suppliers drive efficiencies that reduce operational footprint and costs during the completion phase of well development. Our equipment and services are deployed in most of the active oil and natural gas basins in the United States.

2.    Summary of Significant Accounting Policies

Basis of Presentation and Consolidation

Solaris Oilfield Infrastructure, Inc. (either individually or together with its subsidiaries, as the context requires “Solaris Inc.” or the “Company”) is the managing member of Solaris Oilfield Infrastructure, LLC (“Solaris LLC”) and is responsible for all operational, management and administrative decisions relating to Solaris LLC’s business. Solaris Inc. consolidates the financial results of Solaris LLC and its subsidiaries and reports non-controlling interest related to the portion of the units in Solaris LLC (the “Solaris LLC Units”) not owned by Solaris Inc., which will reduce net income attributable to the holders of Solaris Inc.’s Class A common stock.

The accompanying interim unaudited condensed consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”). These financial statements reflect all normal recurring adjustments that are necessary for fair presentation. Operating results for the three months ended March 31, 2022 and 2021 are not necessarily indicative of the results that may be expected for the full year or for any interim period.

The unaudited interim condensed consolidated financial statements do not include all information or notes required by GAAP for annual financial statements and should be read together with Solaris Inc.’s Annual Report on Form 10-K for the year ended December 31, 2021 and notes thereto.

All material intercompany transactions and balances have been eliminated upon consolidation.

Global Economic, Geopolitical and Market Conditions

The recent invasion of Ukraine by Russia has the potential to disrupt the supply and demand for oil and natural gas across the globe. The degree to which these and other events outside of our control adversely impacts our results will depend on future developments, which are highly uncertain, cannot be predicted and are outside of our control. The timing, extent, trajectory and duration of their impacts upon our business and the industry in which we, our customers and vendors operate could impact any subsequent recovery of normal economic and operating conditions.

Use of Estimates

The preparation of consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

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The most significant estimates relate to stock-based compensation, useful lives and salvage values of long-lived assets, future cash flows associated with goodwill and long-lived asset impairment, net realizable value of inventory, income taxes, Tax Receivable Agreement liability, collectability of accounts receivable and estimates of allowance for credit losses and determination of the present value of lease payments and right-of-use assets.

Revenue Recognition

The Company recognizes revenue in accordance with ASC Topic 606, Revenues from Contracts with Customers (“ASC Topic 606”). Under ASC Topic 606, revenue recognition is based on the transfer of control, or the customer’s ability to benefit from our services and products in an amount that reflects the consideration expected to be received in exchange for those services and products.

The majority of our contracts contain multiple performance obligations, such as work orders containing a combination of equipment, transportation, and labor services. We allocate the transaction price to each performance obligation identified in the contract based on relative stand-alone selling prices, or estimates of such prices, and recognize the related revenue as control of each individual product or service is transferred to the customer, in satisfaction of the corresponding performance obligations. We measure progress using an input method based on resources consumed or expended relative to the total resources expected to be consumed or expended. We assess our customers’ ability and intention to pay, which is based on a variety of factors including historical payment experience and financial condition and we typically charge our customers on a weekly or monthly basis. Contracts with customers are typically on thirty- to sixty-day payment terms.

Disaggregation of Revenue

The following table summarizes revenues from our contracts disaggregated by revenue generating activity contained therein for the quarters ended March 31, 2022 and 2021:

	Three Months Ended March 31,
	2022		2021
Wellsite services	$	56.6	$	28.4
Transloading and Other		0.3		0.3
Total revenue	$	56.9	$	28.7

Recently Issued Accounting Standards

In March 2020, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) No. 2020-04, Reference Rate Reform, which provides temporary optional guidance to companies impacted by the transition away from the London Interbank Offered Rate (“LIBOR”). The guidance provides certain expedients and exceptions to applying GAAP in order to lessen the potential accounting burden when contracts, hedging relationships, and other transactions that reference LIBOR as a benchmark rate are modified. This guidance is effective upon issuance and expires on December 31, 2022. The Company is currently assessing the impact of the LIBOR transition and this ASU on the Company’s financial statements and any agreements utilizing LIBOR, including the Tax Receivable Agreement, but does not currently expect to have a material impact on our financial statements.

3.    Property, Plant and Equipment

Property, plant and equipment are stated at cost. We manufacture or construct most of our systems. During the manufacturing of these assets, they are reflected as systems in process until complete. Modifications to existing systems,

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including the expenditures for upgrades and enhancements that result in additional functionality, increased efficiency, or the extension of the estimated useful life, are capitalized. Property, plant and equipment consists of the following:

	March 31,		December 31,
	2022		2021
Systems and related equipment	$	309.3	$	306.6
Systems in process		31.1		19.9
Computer hardware and software		1.3		1.2
Machinery and equipment		5.4		5.4
Vehicles		5.7		5.6
Buildings		4.4		4.4
Land		0.6		0.6
Furniture and fixtures		0.4		0.4
Property, plant and equipment, gross	$	358.2	$	344.1
Less: accumulated depreciation		(110.6)		(104.0)
Property, plant and equipment, net	$	247.6	$	240.1

4.    Debt

On February 24, 2022, Solaris LLC executed the first amendment (the “2022 Amendment”) to the Amended and Restated Credit Agreement (the “Credit Agreement”), which was originally entered into on April 26, 2019, by and among Solaris LLC, as borrower, each of the lenders party thereto and Wells Fargo Bank, National Association, as administrative agent. The 2022 Amendment extended the term of the Credit Agreement to expire on April 26, 2025 and modified applicable interest rates and repayment requirements.

The Credit Agreement consists of an initial $50.0 revolving loan commitment (the “Loan”) with a $25.0 uncommitted accordion option to increase the Loan availability to $75.0. As of March 31, 2022, we had no borrowings under the Credit Agreement outstanding and ability to draw $50.0.

Our obligations under the Loan are generally secured by a pledge of substantially all the assets of Solaris LLC and its subsidiaries, and such obligations are guaranteed by Solaris LLC’s domestic subsidiaries other than Immaterial Subsidiaries (as defined in the Credit Agreement). We have the option to prepay the loans at any time without penalty.

Borrowings under the Credit Agreement, following the 2022 Amendment, bear interest at either Term Secured Overnight Financing Rate (“SOFR”) or an alternate base rate plus an applicable margin, and interest is payable quarterly for alternate base rate loans or the last business day of the interest period applicable to SOFR loans. The applicable margin ranges from 2.75% to 3.50% for SOFR loans and 1.75% to 2.50% for alternate base rate loans, in each case depending on our total leverage ratio. The Credit Agreement requires that we pay a quarterly commitment fee on undrawn amounts of the Loan, ranging from 0.375% to 0.5% depending upon the total leverage ratio.

The Credit Agreement requires that we maintain ratios of (i) consolidated EBITDA to interest expense of not less than 2.75 to 1.00, (ii) senior indebtedness to consolidated EBITDA of not more than 2.50 to 1.00 and (iii) the sum of 100% of eligible accounts, inventory and fixed assets to the total revolving exposure of not less than 1.00 to 1.00 when the total leverage ratio is greater than 2.00 to 1.00 and total revolving exposure under the Loan exceeds $3.0. For the purpose of these tests, certain items are subtracted from indebtedness and senior indebtedness. EBITDA, as defined in the Credit Agreement, excludes certain noncash items and any extraordinary, unusual or nonrecurring gains, losses or expenses.

Following the 2022 Amendment, the Credit Agreement also requires that we prepay any outstanding borrowings in the event our total consolidated cash balance exceeds $20.0 on the last business day of every other calendar week, taking into account certain adjustments. Capital expenditures are not restricted unless borrowings under the Loan exceed $5.0 for any 180 consecutive day period, in which case capital expenditures will be permitted up to $100.0 plus any unused availability for capital expenditures from the immediately preceding fiscal year.

As of March 31, 2022, we were in compliance with all covenants in accordance with the Credit Agreement.

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5.    Equity

Dividends

Solaris LLC paid distributions totaling $4.9 and $4.8 to all Solaris LLC unitholders in the three months ended March 31, 2022 and 2021, respectively, of which $3.4 and $3.3 was paid to Solaris Inc. Solaris Inc. used the proceeds from the distributions to pay quarterly cash dividends to all holders of shares of Class A common stock.

Stock-based compensation

The Company’s long-term incentive plan for employees, directors and consultants (the “LTIP”) provides for the grant of all or any of the following types of equity-based awards: (i) incentive stock options qualified as such under United States federal income tax laws; (ii) stock options that do not qualify as incentive stock options; (iii) stock appreciation rights; (iv) restricted stock awards; (v) restricted stock units; (vi) bonus stock; (vii) performance awards; (viii) dividend equivalents; (ix) other stock-based awards; (x) cash awards; and (xi) substitute awards.

Subject to adjustment in accordance with the terms of the LTIP, 5,118,080 shares of Solaris Inc.’s Class A common stock have been reserved for issuance pursuant to awards under the LTIP. As of March 31, 2022, 1,678,322 stock awards were available for grant.

The following table summarizes activity related to restricted stock for the three months ended March 31, 2022 and 2021:

	Restricted Stock Awards
	2022	2021
Unvested at January 1,	847,315	703,115
Awarded	884,983	414,185
Vested	(366,250)	(223,275)
Forfeited	(804)	(5,388)
Unvested at March 31,	1,365,244	888,637

Of the unvested 1,365,244 shares of restricted stock, it is expected that 73,658 shares, 552,060 shares, 453,149 shares and 286,377 shares will vest in 2022, 2023, 2024 and 2025, respectively, in each case, subject to the applicable vesting terms governing such shares of restricted stock. There was approximately $12.6 of unrecognized compensation expense related to unvested restricted stock as of March 31, 2022. The unrecognized compensation expense will be recognized over the weighted average remaining vesting period of 1.6 years.

Income (Loss) Per Share

Basic income (loss) per share of Class A common stock is computed by dividing net income (loss) attributable to Solaris Inc. by the weighted-average number of shares of Class A common stock outstanding during the same period. Diluted income (loss) per share is computed giving effect to all potentially dilutive shares.

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The following table sets forth the calculation of income (loss) per share for the three months ended March 31, 2022 and 2021:

	Three Months Ended March 31,
Basic net income (loss) per share:	2022		2021
Numerator
Net income (loss) attributable to Solaris	$	3.5	$	(1.2)
Income (loss) attributable to participating securities (1)		(0.1)		(0.1)
Net income (loss) attributable to common stockholders	$	3.4	$	(1.3)
Denominator
Weighted average number of unrestricted outstanding common shares used to calculate basic net income (loss) per share		31,239		29,957
Diluted weighted-average shares of Class A common stock outstanding used to calculate diluted net income (loss) per share		31,239		29,957
Income (loss) per share of Class A common stock - basic	$	0.11	$	(0.04)
Income (loss) per share of Class A common stock - diluted	$	0.11	$	(0.04)

(1) The Company’s restricted shares of common stock are participating securities.

The following number of weighted-average potentially dilutive shares were excluded from the calculation of diluted loss per share because the effect of including such potentially dilutive shares would have been antidilutive upon conversion:

	Three Months Ended March 31,
	2022		2021
Class B common stock		13,769		14,729
Restricted stock awards		44		113
Stock Options		7		10
Total		13,820		14,852

6. Income Taxes

Income Taxes

Solaris Inc. is a corporation and, as a result, is subject to United States federal, state and local income taxes. Solaris LLC is treated as a partnership for United States federal income tax purposes and therefore does not pay United States federal income tax on its taxable income. Instead, the Solaris LLC unitholders, including Solaris Inc., are liable for United States federal income tax on their respective shares of Solaris LLC’s taxable income reported on the unitholders’ United States federal income tax returns. Solaris LLC is liable for income taxes in those states not recognizing its status as a partnership for United States federal income tax purposes.

For the three months ended March 31, 2022 and 2021, we recognized a combined United States federal and state (expense)/benefit for income taxes of ($1.6) and ($0.2), respectively. The effective combined United States federal and state income tax rates were 22.3% and 10.0% for the three months ended March 31, 2022 and 2021, respectively. For the three months ended March 31, 2022 and 2021, our effective tax rate differed from the statutory rate primarily due to Solaris LLC’s treatment as a partnership for United States federal income tax purposes.

The Company’s deferred tax position reflects the net tax effects of the temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax reporting. The largest components of the Company’s deferred tax position relate to the Company’s investment in Solaris LLC and net

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operating loss carryovers. The Company recorded a deferred tax asset and additional paid-in capital for the difference between the book value and the tax basis of the Company’s investment in Solaris LLC. This difference originates from the equity offerings of Class A common stock, exchanges of Solaris LLC Units (together with a corresponding number of shares of Class B common stock) for shares of Class A common stock, and issuances of Class A common stock, and corresponding Solaris LLC Units, in connection with stock-based compensation.

Based on our cumulative earnings history and forecasted future sources of taxable income, we believe that we will be able to realize our deferred tax assets in the future. As the Company reassesses this position in the future, changes in cumulative earnings history, excluding non-recurring charges, or changes to forecasted taxable income may alter this expectation and may result in an increase in the valuation allowance and an increase in the effective tax rate.

Section 382 of the Internal Revenue Code of 1986, contains rules that limit the ability of a company that undergoes an “ownership change” to utilize its net operating loss and tax credit carryovers and certain built-in losses recognized in years after the “ownership change.” An “ownership change” is generally defined as any change in ownership of more than 50% of a corporation’s stock over a rolling three-year period by stockholders that own (directly or indirectly) 5% or more of the stock of a corporation, or arising from a new issuance of stock by a corporation. If an ownership change occurs, Section 382 generally imposes an annual limitation on the use of pre-ownership change net operating loss carryovers to offset taxable income earned after the ownership change. We do not believe the Section 382 annual limitation related to historical ownership changes impacts our ability to utilize our net operating losses; however, if we were to experience a future ownership change our ability to use net operating losses may be impacted.

Payables Related to the Tax Receivable Agreement

As of March 31, 2022, our liability under the Tax Receivable Agreement was $73,102, representing 85% of the net cash savings in United States federal, state and local income tax or franchise tax that Solaris Inc. anticipates realizing in future years from certain increases in tax basis and certain tax benefits attributable to imputed interest as a result of Solaris Inc.’s acquisition (or deemed acquisition for United States federal income tax purposes) of Solaris LLC Units in connection with the IPO or pursuant to an exercise of the Redemption Right or the Call Right (each as defined in the Solaris LLC Agreement) and additional tax basis arising from any payments Solaris Inc. makes under the Tax Receivable Agreement.

7.  Concentrations

For the three months ended March 31, 2022, one customer accounted for 29% of the Company’s revenues. For the three months ended March 31, 2021, two customers accounted for 26% of the Company’s revenues. As of March 31, 2022, two customers accounted for 44% of the Company’s accounts receivable. As of December 31, 2021, two customers accounted for 29% and 13% of the Company’s accounts receivable, respectively.

For the three months ended March 31, 2022, one supplier accounted for 11% of the Company’s total purchases. For the three months ended March 31, 2021, one supplier accounted for 12% of the Company’s total purchases. As of March 31, 2022, one supplier accounted for 11% of the Company’s accounts payable. As of December 31, 2021, no supplier accounted for 10% of the Company’s accounts payable.

8.  Commitments and Contingencies

In the normal course of business, the Company is subjected to various claims, legal actions, contract negotiations and disputes. The Company provides for losses, if any, in the year in which they can be reasonably estimated. In management’s opinion, there are currently no such matters outstanding that would have a material effect on the accompanying condensed consolidated financial statements.

See Note 9 “Related Party Transactions” for contingent payments related to contracts with customers.

9.  Related Party Transactions

The Company recognizes certain costs incurred in relation to transactions incurred in connection with the amended and restated administrative services agreement, dated May 17, 2017, between Solaris LLC and Solaris Energy

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Management, LLC, a company owned by William A. Zartler, the Chief Executive Officer and Chairman of the Board. These services include rent paid for office space, travel services, personnel, consulting and administrative costs. For the three months ended March 31, 2022 and 2021, Solaris LLC paid $0.2 and $0.2, respectively, for these services. As of March 31, 2022, and December 31, 2021, the Company included $0.1 and $0.1, respectively, in prepaid expenses and other current assets on the condensed consolidated balance sheets. Additionally, as of March 31, 2022 and December 31, 2021, the Company included $0.1 and $0.1, respectively, of accruals to related parties in accrued liabilities on the consolidated balance sheet.

The Company has executed a guarantee of lease agreement with Solaris Energy Management, LLC, a related party of the Company, related to the rental of office space for the Company’s corporate headquarters. The total future guaranty under the guarantee of lease agreement with Solaris Energy Management, LLC is $4.3 as of March 31, 2022.

On March 26, 2021, THRC Holdings, LP (“THRC”), purchased shares representing an 8.5% ownership of the Company’s Class A common stock and 5.9% total shares outstanding as of December 31, 2021. On February 10, 2022, THRC purchased additional shares representing a total ownership of 10.3% of the Company’s Class A common stock and 7.2% total shares outstanding as of December 31, 2021. THRC is affiliated with certain of the Company’s customers, including ProFrac Services, LLC (“ProFrac”) and certain of the Company’s suppliers including Automatize Logistics, LLC, IOT-EQ, LLC and Cisco Logistics, LLC (“Cisco”) (together the “THRC Affiliates”). For the three months ended March 31, 2022, the Company recognized revenues related to our service offering provided to the THRC Affiliates of $5.1. Accounts receivable related to THRC Affiliates as of March 31, 2022, were $4.8. For the three months ended March 31, 2022, the Company recognized cost of services provided by THRC Affiliates of $0.8. There was $0.1 accounts payable related to THRC Affiliates as of March 31, 2022.

Solaris is a dedicated wellsite sand storage provider (“Services”) to certain THRC Affiliates. Solaris provides volume-based pricing for the Services and may be required to pay up to $4.0 in payments throughout a term ending in 2024, contingent upon the ability of these affiliates to meet minimum Services revenue thresholds. During the first quarter of 2022, Solaris paid $0.5 related to these Services, which was recognized in revenues.

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

Solaris Oilfield Infrastructure, Inc. (either individually or together with its subsidiaries, as the context requires, “we,” “us,” “our,” “Solaris Inc.” or the “Company”). The following discussion and analysis of our financial condition and results of operations should be read in conjunction with the accompanying financial statements and related notes. The following discussion contains “forward-looking statements” that reflect our plans, estimates, beliefs and expected performance. Our actual results may differ materially from those anticipated as discussed in these forward-looking statements as a result of a variety of risks and uncertainties, including those described above in “Cautionary Statement Regarding Forward-Looking Statements” included elsewhere in this Quarterly Report and “Risk Factors” included in this Quarterly Report and the Annual Report on Form 10-K for the year ended December 31, 2021 as updated by our subsequent filings with the United States Securities and Exchange Commission (the “SEC”), all of which are difficult to predict. In light of these risks, uncertainties and assumptions, the forward-looking events discussed may not occur. We assume no obligation to update any of these forward-looking statements except as otherwise required by law.

Overview

We design and manufacture specialized equipment, which combined with field technician support, logistics services and our software solutions, enables us to provide a service offering that helps oil and natural gas operators and their suppliers to drive efficiencies and reduce oil and gas development costs and environmental impact. The majority of our revenue is currently derived from providing equipment and services related to our mobile proppant and fluid management systems and our last mile logistics management services. We also generate revenue from new technology and offerings that work in conjunction with our mobile proppant and fluid management systems, including our AutoBlend™ integrated electric blender and proprietary top fill equipment. Our systems and equipment are deployed in most of the active oil and natural gas basins in the United States.

Recent Trends and Outlook

Exiting 2021, the oil and natural gas industry continued its recovery as global economic activity improved. Tightening supply and demand fundamentals, impacted by the geopolitical uncertainty surrounding the Ukrainian conflict, drove WTI oil prices to a high of over $120 per barrel in March 2022 from $75 per barrel in January 2022. While the improvement in commodity prices has driven an increase in drilling and completion activity in North America, overall activity levels in North America continue to be impacted by capital discipline among many operators, supply chain disruptions and rising inflation.

North American land activity improved into 2022 as the Baker Hughes Land rig count increased 15% since the start of the year to 656 rigs at the end of March 2022, as compared to a 19% increase in our fully utilized systems in the first quarter of 2022. Overall, demand for our offerings is predominantly influenced by the level of oil and natural gas well drilling and completion activity. While our fully utilized systems are highly correlated with US land rig count activity over longer periods, timing differences between drilling and completion activity can result in lags of one to two quarters or longer.

The sustainability of favorable supply-demand dynamics and a strong commodity environment will depend on multiple factors, including any supply chain disruptions, potential regulatory changes and potential impacts from geopolitical disruptions. Consolidation amongst some of our E&P and oil service customers combined with financial discipline from publicly traded energy companies has reduced industry-wide capital spending. Additionally, consolidation can drive procurement strategy changes, which has historically resulted in both market share gains and losses for the Company. We expect both consolidation and financial discipline will likely continue to be important themes for the energy industry going forward.

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Results of Operations

Three Months Ended March 31, 2022 Compared to Three Months Ended March 31, 2021

	Three Months Ended
	March 31,
	2022		2021		Change
	(in thousands)
Revenue		56,915		28,669		28,246
Operating costs and expenses:
Cost of services (exclusive of depreciation)		37,671		19,206		18,465
Depreciation and amortization		6,929		6,693		236
Selling, general and administrative (excluding depreciation and amortization)		5,211		4,606		605
Other operating (income) expense		(309)		253		(562)
Total operating costs and expenses		49,502		30,758		18,744
Operating income (loss)		7,413		(2,089)		9,502
Interest income (expense), net		(79)		(49)		(30)
Total other income (expense)		(79)		(49)		(30)
Income (loss) before income tax expense		7,334		(2,138)		9,472
(Expense) benefit for income taxes		(1,612)		213		(1,825)
Net income (loss)		5,722		(1,925)		7,647
Less: net (income) loss related to non-controlling interests		(2,220)		756		(2,976)
Net income (loss) attributable to Solaris	$	3,502	$	(1,169)	$	4,671

Revenue

Revenue increased $28.2 million, or 99%, to $56.9 million for the three months ended March 31, 2022 compared to $28.7 million for the three months ended March 31, 2021. The increase in revenue is primarily related to increases in demand for our products and services. Mobile proppant systems, on a fully utilized basis, increased from 52 systems for the three months ended March 31, 2021 to 75 systems for the three months ended March 31, 2022, in response to the increase in activity levels of our customers, driven primarily by stronger commodity prices.

Cost of Services

Cost of services, excluding depreciation and amortization expense increased $18.5 million, or 96%, to $37.7 million for the three months ended March 31, 2022 compared to $19.2 million for the three months ended March 31, 2021. The increase was primarily due to operating costs related to an increase in demand for our products and services. Cost of services, excluding depreciation and amortization as a percentage of revenue was 66% and 67% for the three months ended March 31, 2022 and 2021, respectively.

Selling, General and Administrative Expenses

Selling, general and administrative expenses increased $0.6 million, or 13%, to $5.2 million for the three months ended March 31, 2022 compared to $4.6 million for the three months ended March 31, 2021. Selling, general and administrative expenses increased due primarily to increases in headcount and professional fees.

Provision for Income Taxes

During the three months ended March 31, 2022, we recognized a combined United States federal and state expense for income taxes of $1.6 million, an increase of $1.8 million as compared to the $0.2 million income tax benefit we recognized during the three months ended March 31, 2021. This change was attributable to operating gains. The effective combined United States federal and state income tax rates were 22.3% and 10.0% for the three months ended March 31, 2022 and 2021, respectively. The effective tax rate differed from the statutory rate primarily due to Solaris LLC’s treatment as a partnership for United States federal income tax purposes.

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Comparison of Non-GAAP Financial Measures

EBITDA and Adjusted EBITDA

We view EBITDA and Adjusted EBITDA as important indicators of performance. We define EBITDA as net income, plus (i) depreciation and amortization expense, (ii) interest expense and (iii) income tax expense, including franchise taxes. We define Adjusted EBITDA as EBITDA plus (i) stock-based compensation expense and (ii) certain non-cash items and any extraordinary, unusual or non-recurring gains, losses or expenses.

EBITDA and Adjusted EBITDA should not be considered in isolation or as substitutes for an analysis of our results of operation and financial condition as reported in accordance with accounting standards generally accepted in the United States (“GAAP”). Net income is the GAAP measure most directly comparable to EBITDA and Adjusted EBITDA. EBITDA and Adjusted EBITDA should not be considered alternatives to net income presented in accordance with GAAP. Because EBITDA and Adjusted EBITDA may be defined differently by other companies in our industry, our definitions of EBITDA and Adjusted EBITDA may not be comparable to similarly titled measures of other companies, thereby diminishing their utility.

The following table presents a reconciliation of Net income to EBITDA and Adjusted EBITDA for each of the periods indicated.

	Three months ended
	March 31,
	2022		2021		Change
	(in thousands)
Net income (loss)	$	5,722	$	(1,925)	$	7,647
Depreciation and amortization		6,929		6,693		236
Interest expense, net		79		49		30
Income taxes (1)		1,612		(213)		1,825
EBITDA	$	14,342	$	4,604	$	9,738
Stock-based compensation expense (2)		1,593		1,199		394
Loss on disposal of assets		5		18		(13)
Gain on insurance claims		(190)		—		(190)
Credit losses and adjustments to credit losses		(27)		283		(310)
Transaction costs (3)		17		14		3
Adjusted EBITDA	$	15,740	$	6,118	$	9,622

(1) United States federal and state income taxes.

(2) Represents stock-based compensation expense related to restricted stock awards.

(3) Costs related to the evaluation of potential acquisitions.

Three Months Ended March 31, 2022 Compared to Three Months Ended March 31, 2021: EBITDA and Adjusted EBITDA

EBITDA increased $9.7 million to $14.3 million for the three months ended March 31, 2022 compared to $4.6 million for the three months ended March 31, 2021. Adjusted EBITDA increased $9.6 million to $15.7 million for the three months ended March 31, 2022 compared to $6.1 million for the three months ended March 31, 2021. The changes in EBITDA and Adjusted EBITDA were primarily due to the changes in revenues and expenses, discussed above.

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Liquidity and Capital Resources

Overview

Our primary sources of liquidity to date have been cash flows from operations, borrowings under our credit agreements and proceeds from equity offerings. Our primary uses of capital have been to fund ongoing operations, capital expenditures to support organic growth, including our fleet development and related maintenance and fleet upgrades, repurchase shares of Class A common stock in the open market, and pay dividends. Although no assurance can be given, depending upon market conditions and other factors, we may also have the ability to issue additional equity and debt if needed.

As of March 31, 2022, cash and cash equivalents totaled $25.1 million. We have no borrowings outstanding under our Credit Agreement and have $50.0 million of available borrowing capacity. We believe that our cash on hand, operating cash flow and available borrowings under our Credit Agreement will be sufficient to fund our operations for at least the next 12 months.

Cash Flows

The following table summarizes our cash flows for the periods indicated:

	Three Months Ended
	March 31,
	2022		2021		Change
	(in thousands)
Net cash provided by operating activities	$	6,269	$	2,766	$	3,503
Net cash used in investing activities		(11,507)		(2,607)		(8,900)
Net cash used in financing activities		(6,131)		(5,465)		(666)
Net change in cash	$	(11,369)	$	(5,306)	$	(6,063)

Significant Sources and Uses of Cash Flows

Operating Activities. Net cash provided by operating activities was $6.3 million for the three months ended March 31, 2022, compared to net cash provided by operating activities of $2.8 million for the three months ended March 31, 2021. The increase of $3.5 million in operating cash flow was primarily attributable to increases in working capital.

Investing Activities. Net cash used in investing activities was $11.5 million for the three months ended March 31, 2022, compared to net cash used in investing activities of $2.6 million for the three months ended March 31, 2021. The increase in investing activities of $8.9 million is primarily due to capital expenditures related to enhancements to our fleet and for new technologies.

Financing Activities. Net cash used in financing activities of $6.1 million for the three months ended March 31, 2022 was primarily related to quarterly dividends of $4.9 million and $1.0 million of payments related to vesting of stock-based compensation. Net cash used in financing activities of $5.5 million for the three months ended March 31, 2021 was primarily related to quarterly dividends of $4.8 million and $0.6 million of payments related to vesting of stock-based compensation.

Capital Sources

Senior Secured Credit Facility

See Note 4. “Debt” to our condensed consolidated financial statements as of March 31, 2022, for a discussion of our senior secured credit facility.

Future Sources and Uses of Cash

Our material cash commitments consist primarily of obligations under our Credit Agreement, Tax Receivable Agreement, finance and operating leases for property and equipment, and purchase obligations as a part of normal

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operations. We have no material off balance sheet arrangements as of March 31, 2022, except for purchase commitments under supply agreements disclosed below.

As of March 31, 2022, we expect to pay approximately $0.2 million in commitment fees on our Credit Agreement within the next twelve months, calculated based on the unused portion of lender commitments, at the applicable commitment fee rate of 0.375%.

As of March 31, 2022, we had purchase obligations of approximately $27.0 million payable within the next twelve months.

Critical Accounting Policies and Estimates

We had no material changes in our critical accounting policies and estimates during the three months ended March 31, 2022 from the amounts listed under Part II, Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 for additional information.

Recent Accounting Pronouncements

Recently Adopted Accounting Standards

None.

Recently Issued Accounting Standards

See Note 2. “Summary of Significant Accounting Policies – Recently Issued Accounting Standards” to our condensed consolidated financial statements as of March 31, 2022, for a discussion of recently issued accounting standards.

Under the Jumpstart Our Business Startups Act (the “JOBS Act”), we meet the definition of an “emerging growth company,” which allows us to have an extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act, however, we elected to opt out of such exemption (this election is irrevocable).

Off Balance Sheet Arrangements

We have no material off balance sheet arrangements. As such, we are not materially exposed to any financing, liquidity, market or credit risk that could arise if we had engaged in such financing arrangements.

Item 3.Quantitative and Qualitative Disclosures about Market Risk

For quantitative and qualitative disclosures about market risk, see Part II, Item 7A. “Quantitative and Qualitative Disclosures about Market Risk” in our Annual Report on Form 10-K for the year ended December 31, 2021. Our exposure to market risk has not changed materially since December 31, 2021.

Credit Risk

The majority of our accounts receivable have payment terms of 60 days or less. As of March 31, 2022, two customers collectively accounted for 44% of our total accounts receivable. As of December 31, 2021, two customers collectively accounted for 42% of our total accounts receivable. We mitigate the associated credit risk by performing credit evaluations and monitoring the payment patterns of our customers. Please see Part I, Item 1A. “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2021 for more information regarding credit risk of our customers.

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Item 4.Controls and Procedures

Disclosure Controls and Procedures

In accordance with Exchange Act Rules 13a-15 and 15d-15, we have evaluated, under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of March 31, 2022. Our disclosure controls and procedures are designed to provide reasonable assurance that the information required to be disclosed by us in reports that we file under the Exchange Act is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure and is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC. Based on the evaluation of our disclosure controls and procedures as of March 31, 2022, our principal executive officer and principal financial officer have concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control over Financial Reporting

There were no changes in our system of internal control over financial reporting (as defined in Rule 13a-15(f) and Rule 15d-15(f) under the Exchange Act) during the quarter ended March 31, 2022 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1.        Legal Proceedings

Due to the nature of our business, we may become, from time to time, involved in routine litigation or subject to disputes or claims related to our business activities. In the opinion of our management, there are no pending litigation, disputes or claims against us which, if decided adversely, will have a material adverse effect on our financial condition, cash flows or results of operations.

Item 1A.      Risk Factors

Factors that could materially adversely affect our business, financial condition, operating results or liquidity and the trading price of our Class A common stock are described under Part I, Item 1A. “Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2021, as filed with the SEC on February 24, 2022. As of the date of this filing, there have been no material updates to the risk factors previously disclosed in Part I, Item 1A “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2021.

Item 2.        Unregistered Sales of Equity Securities and Use of Proceeds

Unregistered Sales of Equity Securities

None.

Issuer Purchases of Equity Securities

During the current quarter, we repurchased the shares of Class A common stock as shown in the table below, to satisfy tax withholding obligations upon the vesting of restricted stock awarded to certain of our employees:

	Total Number of	Average Price
	Shares	Paid Per
Period	Purchased	Share
January 1 - January 31	—	$	—
February 1 - February 28	—		—
March 1 - March 31	95,514		12.97
Total	95,514	$	12.97

Item 3.Defaults upon Senior Securities

None.

Item 4.Mine Safety Disclosures

None.

Item 5.Other Information

None.

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Item 6.Exhibits

Exhibit No.	Description
3.1	Amended and Restated Certificate of Incorporation of Solaris Oilfield Infrastructure, Inc. (incorporated by reference to Exhibit 3.1 to the Registrant’s Form 8-K (File No. 001-38090) filed with the Commission on May 23, 2017).
3.2	Amended and Restated Bylaws of Solaris Oilfield Infrastructure, Inc. (incorporated by reference to Exhibit 3.2 to the Registrant’s Form 8-K (File No. 001-38090) filed with the Commission on May 23, 2017).
10.1†	Form of Restricted Stock Agreement under the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan (incorporated by reference to Exhibit 10.2 to the Registrant’s Annual Report on Form 10-K (File No. 001-38090) filed with the Commission on February 24, 2022).
10.2	Amended Credit Agreement, dated as of February 24, 2022, by and among Solaris Oilfield Infrastructure, Inc., as borrower, each of the lenders party thereto and Wells Fargo Bank, as administrative agent (incorporated by reference to Exhibit 10.20 to the Registrant’s Annual Report on Form 10-K (File No. 001-38090) filed with the Commission on February 24, 2022).
10.3	Indemnification Agreement (Laurie H. Argo) (incorporated by reference to Exhibit 10.1 to the Registrant’s Form 8-K (File No. 001-38090) filed with the Commission on March 21, 2022).
31.1*	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Certification of Chief Executive Officer pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2**	Certification of Chief Financial Officer pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS*	Inline XBRL Instance Document.
101.SCH*	Inline XBRL Taxonomy Extension Schema Document.
101.CAL*	Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF*	Inline XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB*	Inline XBRL Taxonomy Extension Labels Linkbase Document.
101.PRE*	Inline XBRL Taxonomy Extension Presentation Linkbase Document.
104*	Cover Page Interactive Data File – The cover page interactive data file does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document

*     Filed herewith.

**   Furnished herewith. Pursuant to SEC Release No. 33-8212, this certification will be treated as “accompanying” this Quarterly Report on Form 10-Q and not “filed” as part of such report for purposes of Section 18 of the Exchange Act or otherwise subject to the liability of Section 18 of the Exchange Act, and this certification will not be deemed

22

to be incorporated by reference into any filing under the Securities Act, except to the extent that the registrant specifically incorporates it by reference.

† Management contract or compensatory plan or arrangement.

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SIGNATURES

Pursuant to the requirements 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.

	SOLARIS OILFIELD INFRASTRUCTURE, INC.
April 28, 2022	By:	/s/ William A. Zartler
		William A. Zartler
		Chairman and Chief Executive Officer
		(Principal Executive Officer)
April 28, 2022	By:	/s/ Kyle S. Ramachandran
		Kyle S. Ramachandran
		President and Chief Financial Officer
		(Principal Financial Officer)

24

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO RULE 13A-14(A) AND RULE 15D-14(A) OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

I, William A. Zartler, certify that:

1.           I have reviewed this quarterly report on Form 10-Q of Solaris Oilfield Infrastructure, Inc. (the “registrant”);

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(s) 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(s) 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.

Date: April 28, 2022

reg

/s/ William A. Zartler

William A. Zartler

Chairman and Chief Executive Officer (Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13A-14(A) AND RULE 15D-14(A) OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

I, Kyle S. Ramachandran, certify that:

1.           I have reviewed this quarterly report on Form 10-Q of Solaris Oilfield Infrastructure, Inc. (the “registrant”);

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(s) 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(s) 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.

Date: April 28, 2022

/s/ Kyle S. Ramachandran

Kyle S. Ramachandran

President and Chief Financial Officer (Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 906 OF
THE SARBANES-OXLEY ACT OF 2002 (SUBSECTIONS (a) AND (b)
OF SECTION 1350, CHAPTER 63 OF TITLE 18, UNITED STATES CODE)

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), I, William A. Zartler, Chairman and Chief Executive Officer of Solaris Oilfield Infrastructure, Inc. (the “Company”), hereby certify, to my knowledge, that:

(1)the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2022 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	April 28, 2022	/s/ William A. Zartler
		William A. Zartler
		Chairman and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO SECTION 906 OF
THE SARBANES-OXLEY ACT OF 2002 (SUBSECTIONS (a) AND (b)
OF SECTION 1350, CHAPTER 63 OF TITLE 18, UNITED STATES CODE)

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), I, Kyle S. Ramachandran, President and Chief Financial Officer of Solaris Oilfield Infrastructure, Inc. (the “Company”), hereby certify, to my knowledge, that:

(1)the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2022 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	April 28, 2022	/s/ Kyle S. Ramachandran
		Kyle S. Ramachandran
		President and Chief Financial Officer

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2022	Apr. 26, 2022
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-38090
Entity Registrant Name	SOLARIS OILFIELD INFRASTRUCTURE, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	81-5223109
Entity Address, Address Line One	9811 Katy Freeway, Suite 700
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77024
City Area Code	281
Local Phone Number	501-3070
Title of 12(b) Security	Class A Common Stock
Trading Symbol	SOI
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Central Index Key	0001697500
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false
Class A Common Stock
Document and Entity Information
Entity Common Stock, Shares Outstanding		32,807,053
Class B Common Stock
Document and Entity Information
Entity Common Stock, Shares Outstanding		13,757,438

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 25,128	$ 36,497
Accounts receivable, net of allowances for credit losses of $746 and $746, respectively	45,657	33,120
Prepaid expenses and other current assets	8,080	9,797
Inventories	2,136	1,654
Total current assets	81,001	81,068
Property, plant and equipment, net	247,622	240,091
Non-current inventories	2,769	2,676
Operating lease right-of-use assets	4,046	4,182
Goodwill	13,004	13,004
Intangible assets, net	2,008	2,203
Deferred tax assets, net	62,099	62,942
Other assets	352	57
Total assets	412,901	406,223
Current liabilities:
Accounts payable	17,240	9,927
Accrued liabilities	14,508	16,918
Current portion of payables related to Tax Receivable Agreement	1,210	1,210
Current portion of operating lease liabilities	729	717
Current portion of finance lease liabilities	31	31
Other current liabilities	250	496
Total current liabilities	33,968	29,299
Operating lease liabilities, net of current	6,559	6,702
Finance lease liabilities, net of current	62	70
Payables related to Tax Receivable Agreement	71,892	71,892
Other long-term liabilities	381	384
Total liabilities	112,862	108,347
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock, $0.01 par value, 50,000 shares authorized, none issued and outstanding
Additional paid-in capital	198,982	196,912
Retained earnings	5,598	5,925
Total stockholders' equity attributable to Solaris	204,894	203,149
Non-controlling interest	95,145	94,727
Total stockholders' equity	300,039	297,876
Total liabilities and stockholders' equity	412,901	406,223
Class A Common Stock
Stockholders' equity:
Common Stock	314	312
Class B Common Stock
Stockholders' equity:
Common Stock

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Allowance for credit losses	$ 746	$ 746
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000	50,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	600,000	600,000
Common stock, shares issued	31,416	31,146
Common stock, shares outstanding	31,416	31,146
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.00	$ 0.00
Common stock, shares authorized	180,000	180,000
Common stock, shares issued	13,770	13,770
Common stock, shares outstanding	13,770	13,770

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue:
Revenue	$ 56,915	$ 28,669
Operating costs and expenses:
Cost of services (exclusive of depreciation)	37,671	19,206
Depreciation and amortization	6,929	6,693
Selling, general and administrative	5,211	4,606
Other operating (income) expense	(309)	253
Total operating costs and expenses	49,502	30,758
Operating income (loss)	7,413	(2,089)
Interest expense, net	(79)	(49)
Total other expense (income)	(79)	(49)
Income (loss) before income tax expense	7,334	(2,138)
Income tax (expense) benefit	(1,612)	213
Net income (loss)	5,722	(1,925)
Less: net (income) loss related to non-controlling interests	(2,220)	756
Net income (loss) attributable to Solaris	$ 3,502	$ (1,169)
Class A Common Stock
Operating costs and expenses:
Income (loss) per share of Class A common stock - basic (in dollars per share)	$ 0.11	$ (0.04)
Income (loss) per share of Class A common stock - diluted (in dollars per share)	$ 0.11	$ (0.04)
Basic weighted-average shares of Class A common stock outstanding (in shares)	31,239	29,957
Diluted weighted-average shares of Class A common stock outstanding (in shares)	31,239	29,957

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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Retained Earnings	Non-controlling Interest	Total
Balance at beginning of period at Dec. 31, 2020	$ 290		$ 180,415	$ 20,549	$ 114,225	$ 315,479
Balance at beginning of period (in shares) at Dec. 31, 2020	28,943	15,685
Changes in Stockholders' Equity
Exchange of Solaris LLC Units and shares of Class B common stock for shares of Class A common stock	$ 19		13,526		(13,545)
Exchange of Solaris LLC Units and shares of Class B common stock for shares of Class A common stock (in shares)	1,865	(1,865)
Net effect of deferred tax asset and payables related to Tax Receivable Agreement from the exchange of Solaris LLC Units and shares of Class B common stock for shares of Class A common stock and the vesting of restricted stock			(1,184)			(1,184)
Stock option exercises			18		(6)	12
Stock option exercises (in shares)	4
Stock-based compensation			854		418	1,272
Vesting of restricted stock	$ 2		407		(409)
Vesting of restricted stock (in shares)	223
Cancelled shares withheld for taxes from RSU vesting	$ (1)		(146)	(319)	(207)	(673)
Cancelled shares withheld for taxes from RSU vesting (in shares)	(57)
Solaris LLC distribution paid to Solaris LLC unitholders for income tax withholding					(1,451)	(1,451)
Dividends paid (Class A common stock)				(3,346)		(3,346)
Net income (loss)				(1,169)	(756)	(1,925)
Balance at end of period at Mar. 31, 2021	$ 310		193,890	15,715	98,269	308,184
Balance at end of period (in shares) at Mar. 31, 2021	30,978	13,820
Balance at beginning of period at Dec. 31, 2021	$ 312	$ 13,770	196,912	5,925	94,727	297,876
Balance at beginning of period (in shares) at Dec. 31, 2021	31,146
Changes in Stockholders' Equity
Net effect of deferred tax asset and payables related to the vesting of restricted stock			610			610
Stock-based compensation			1,188		520	1,708
Vesting of restricted stock	$ 3		574		(577)
Vesting of restricted stock (in shares)	366
Cancelled shares withheld for taxes from RSU vesting	$ (1)		(302)	(388)	(299)	(990)
Cancelled shares withheld for taxes from RSU vesting (in shares)	(96)
Solaris LLC distribution paid to Solaris LLC unitholders					(1,446)	(1,446)
Dividends paid (Class A common stock)				(3,441)		(3,441)
Net income (loss)				3,502	2,220	5,722
Balance at end of period at Mar. 31, 2022	$ 314	$ 13,770	$ 198,982	$ 5,598	$ 95,145	$ 300,039
Balance at end of period (in shares) at Mar. 31, 2022	31,416

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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
Distributions paid to unit holders (in dollars per unit)	$ 0.105	$ 0.105
Cash dividends paid (in dollars per share)	$ 0.105	$ 0.105

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income (loss)	$ 5,722	$ (1,925)
Adjustment to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	6,929	6,693
Loss on disposal of assets	107	18
Allowance for credit losses		283
Stock-based compensation	1,593	1,199
Amortization of debt issuance costs	40	48
Deferred income tax benefit	1,455	(302)
Other	(1)	5
Changes in operating assets and liabilities:
Accounts receivable	(12,537)	(3,460)
Prepaid expenses and other assets	1,717	235
Inventories	(1,152)	(622)
Accounts payable	5,040	5,055
Accrued liabilities	(2,644)	(4,461)
Net cash provided by operating activities	6,269	2,766
Cash flows from investing activities:
Investment in property, plant and equipment	(11,776)	(2,647)
Cash received from insurance proceeds	231
Proceeds from disposal of assets	38	40
Net cash used in investing activities	(11,507)	(2,607)
Cash flows from financing activities:
Distribution and dividend paid to Solaris LLC unitholders (other than Solaris Inc.) and Class A common shareholders	(4,887)	(4,797)
Payments under finance leases	(8)	(7)
Payments under insurance premium financing	(246)
Proceeds from stock option exercises		12
Payments for shares withheld for taxes from RSU vesting and cancelled	(990)	(673)
Net cash used in financing activities	(6,131)	(5,465)
Net decrease in cash	(11,369)	(5,306)
Cash at beginning of period	36,497	60,366
Cash at end of period	25,128	55,060
Non-cash activities
Capitalized depreciation in property, plant and equipment	146	143
Capitalized stock based compensation	115	73
Accrued capital expenditures	2,827	604
Property, plant and equipment additions transferred from inventory	575	392
Cash paid for:
Interest	37	$ 33
Income Taxes	$ 22

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Organization and Background of Business

3 Months Ended

Mar. 31, 2022

Organization and Background of Business

Organization and Background of Business

1.    Organization and Background of Business

Description of Business

We design and manufacture specialized equipment, which combined with field technician support, logistics services and our software solutions, enables us to provide a service offering that helps oil and natural gas operators and their suppliers drive efficiencies that reduce operational footprint and costs during the completion phase of well development. Our equipment and services are deployed in most of the active oil and natural gas basins in the United States.

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2022

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

2.    Summary of Significant Accounting Policies

Basis of Presentation and Consolidation

Solaris Oilfield Infrastructure, Inc. (either individually or together with its subsidiaries, as the context requires “Solaris Inc.” or the “Company”) is the managing member of Solaris Oilfield Infrastructure, LLC (“Solaris LLC”) and is responsible for all operational, management and administrative decisions relating to Solaris LLC’s business. Solaris Inc. consolidates the financial results of Solaris LLC and its subsidiaries and reports non-controlling interest related to the portion of the units in Solaris LLC (the “Solaris LLC Units”) not owned by Solaris Inc., which will reduce net income attributable to the holders of Solaris Inc.’s Class A common stock.

The accompanying interim unaudited condensed consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”). These financial statements reflect all normal recurring adjustments that are necessary for fair presentation. Operating results for the three months ended March 31, 2022 and 2021 are not necessarily indicative of the results that may be expected for the full year or for any interim period.

The unaudited interim condensed consolidated financial statements do not include all information or notes required by GAAP for annual financial statements and should be read together with Solaris Inc.’s Annual Report on Form 10-K for the year ended December 31, 2021 and notes thereto.

All material intercompany transactions and balances have been eliminated upon consolidation.

Global Economic, Geopolitical and Market Conditions

The recent invasion of Ukraine by Russia has the potential to disrupt the supply and demand for oil and natural gas across the globe. The degree to which these and other events outside of our control adversely impacts our results will depend on future developments, which are highly uncertain, cannot be predicted and are outside of our control. The timing, extent, trajectory and duration of their impacts upon our business and the industry in which we, our customers and vendors operate could impact any subsequent recovery of normal economic and operating conditions.

Use of Estimates

The preparation of consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

The most significant estimates relate to stock-based compensation, useful lives and salvage values of long-lived assets, future cash flows associated with goodwill and long-lived asset impairment, net realizable value of inventory, income taxes, Tax Receivable Agreement liability, collectability of accounts receivable and estimates of allowance for credit losses and determination of the present value of lease payments and right-of-use assets.

Revenue Recognition

The Company recognizes revenue in accordance with ASC Topic 606, Revenues from Contracts with Customers (“ASC Topic 606”). Under ASC Topic 606, revenue recognition is based on the transfer of control, or the customer’s ability to benefit from our services and products in an amount that reflects the consideration expected to be received in exchange for those services and products.

The majority of our contracts contain multiple performance obligations, such as work orders containing a combination of equipment, transportation, and labor services. We allocate the transaction price to each performance obligation identified in the contract based on relative stand-alone selling prices, or estimates of such prices, and recognize the related revenue as control of each individual product or service is transferred to the customer, in satisfaction of the corresponding performance obligations. We measure progress using an input method based on resources consumed or expended relative to the total resources expected to be consumed or expended. We assess our customers’ ability and intention to pay, which is based on a variety of factors including historical payment experience and financial condition and we typically charge our customers on a weekly or monthly basis. Contracts with customers are typically on thirty- to sixty-day payment terms.

Disaggregation of Revenue

The following table summarizes revenues from our contracts disaggregated by revenue generating activity contained therein for the quarters ended March 31, 2022 and 2021:

	Three Months Ended March 31,
	2022		2021
Wellsite services	$	56.6	$	28.4
Transloading and Other		0.3		0.3
Total revenue	$	56.9	$	28.7

Recently Issued Accounting Standards

In March 2020, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) No. 2020-04, Reference Rate Reform, which provides temporary optional guidance to companies impacted by the transition away from the London Interbank Offered Rate (“LIBOR”). The guidance provides certain expedients and exceptions to applying GAAP in order to lessen the potential accounting burden when contracts, hedging relationships, and other transactions that reference LIBOR as a benchmark rate are modified. This guidance is effective upon issuance and expires on December 31, 2022. The Company is currently assessing the impact of the LIBOR transition and this ASU on the Company’s financial statements and any agreements utilizing LIBOR, including the Tax Receivable Agreement, but does not currently expect to have a material impact on our financial statements.

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Property, Plant and Equipment

3 Months Ended

Mar. 31, 2022

Property, Plant and Equipment

Property, Plant and Equipment

3.    Property, Plant and Equipment

Property, plant and equipment are stated at cost. We manufacture or construct most of our systems. During the manufacturing of these assets, they are reflected as systems in process until complete. Modifications to existing systems,

including the expenditures for upgrades and enhancements that result in additional functionality, increased efficiency, or the extension of the estimated useful life, are capitalized. Property, plant and equipment consists of the following:

	March 31,		December 31,
	2022		2021
Systems and related equipment	$	309.3	$	306.6
Systems in process		31.1		19.9
Computer hardware and software		1.3		1.2
Machinery and equipment		5.4		5.4
Vehicles		5.7		5.6
Buildings		4.4		4.4
Land		0.6		0.6
Furniture and fixtures		0.4		0.4
Property, plant and equipment, gross	$	358.2	$	344.1
Less: accumulated depreciation		(110.6)		(104.0)
Property, plant and equipment, net	$	247.6	$	240.1

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Debt

3 Months Ended

Mar. 31, 2022

Senior Secured Credit Facility

Debt

4.    Debt

On February 24, 2022, Solaris LLC executed the first amendment (the “2022 Amendment”) to the Amended and Restated Credit Agreement (the “Credit Agreement”), which was originally entered into on April 26, 2019, by and among Solaris LLC, as borrower, each of the lenders party thereto and Wells Fargo Bank, National Association, as administrative agent. The 2022 Amendment extended the term of the Credit Agreement to expire on April 26, 2025 and modified applicable interest rates and repayment requirements.

The Credit Agreement consists of an initial $50.0 revolving loan commitment (the “Loan”) with a $25.0 uncommitted accordion option to increase the Loan availability to $75.0. As of March 31, 2022, we had no borrowings under the Credit Agreement outstanding and ability to draw $50.0.

Our obligations under the Loan are generally secured by a pledge of substantially all the assets of Solaris LLC and its subsidiaries, and such obligations are guaranteed by Solaris LLC’s domestic subsidiaries other than Immaterial Subsidiaries (as defined in the Credit Agreement). We have the option to prepay the loans at any time without penalty.

Borrowings under the Credit Agreement, following the 2022 Amendment, bear interest at either Term Secured Overnight Financing Rate (“SOFR”) or an alternate base rate plus an applicable margin, and interest is payable quarterly for alternate base rate loans or the last business day of the interest period applicable to SOFR loans. The applicable margin ranges from 2.75% to 3.50% for SOFR loans and 1.75% to 2.50% for alternate base rate loans, in each case depending on our total leverage ratio. The Credit Agreement requires that we pay a quarterly commitment fee on undrawn amounts of the Loan, ranging from 0.375% to 0.5% depending upon the total leverage ratio.

The Credit Agreement requires that we maintain ratios of (i) consolidated EBITDA to interest expense of not less than 2.75 to 1.00, (ii) senior indebtedness to consolidated EBITDA of not more than 2.50 to 1.00 and (iii) the sum of 100% of eligible accounts, inventory and fixed assets to the total revolving exposure of not less than 1.00 to 1.00 when the total leverage ratio is greater than 2.00 to 1.00 and total revolving exposure under the Loan exceeds $3.0. For the purpose of these tests, certain items are subtracted from indebtedness and senior indebtedness. EBITDA, as defined in the Credit Agreement, excludes certain noncash items and any extraordinary, unusual or nonrecurring gains, losses or expenses.

Following the 2022 Amendment, the Credit Agreement also requires that we prepay any outstanding borrowings in the event our total consolidated cash balance exceeds $20.0 on the last business day of every other calendar week, taking into account certain adjustments. Capital expenditures are not restricted unless borrowings under the Loan exceed $5.0 for any 180 consecutive day period, in which case capital expenditures will be permitted up to $100.0 plus any unused availability for capital expenditures from the immediately preceding fiscal year.

As of March 31, 2022, we were in compliance with all covenants in accordance with the Credit Agreement.

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Equity

3 Months Ended

Mar. 31, 2022

Equity

Equity

5.    Equity

Dividends

Solaris LLC paid distributions totaling $4.9 and $4.8 to all Solaris LLC unitholders in the three months ended March 31, 2022 and 2021, respectively, of which $3.4 and $3.3 was paid to Solaris Inc. Solaris Inc. used the proceeds from the distributions to pay quarterly cash dividends to all holders of shares of Class A common stock.

Stock-based compensation

The Company’s long-term incentive plan for employees, directors and consultants (the “LTIP”) provides for the grant of all or any of the following types of equity-based awards: (i) incentive stock options qualified as such under United States federal income tax laws; (ii) stock options that do not qualify as incentive stock options; (iii) stock appreciation rights; (iv) restricted stock awards; (v) restricted stock units; (vi) bonus stock; (vii) performance awards; (viii) dividend equivalents; (ix) other stock-based awards; (x) cash awards; and (xi) substitute awards.

Subject to adjustment in accordance with the terms of the LTIP, 5,118,080 shares of Solaris Inc.’s Class A common stock have been reserved for issuance pursuant to awards under the LTIP. As of March 31, 2022, 1,678,322 stock awards were available for grant.

The following table summarizes activity related to restricted stock for the three months ended March 31, 2022 and 2021:

	Restricted Stock Awards
	2022	2021
Unvested at January 1,	847,315	703,115
Awarded	884,983	414,185
Vested	(366,250)	(223,275)
Forfeited	(804)	(5,388)
Unvested at March 31,	1,365,244	888,637

Of the unvested 1,365,244 shares of restricted stock, it is expected that 73,658 shares, 552,060 shares, 453,149 shares and 286,377 shares will vest in 2022, 2023, 2024 and 2025, respectively, in each case, subject to the applicable vesting terms governing such shares of restricted stock. There was approximately $12.6 of unrecognized compensation expense related to unvested restricted stock as of March 31, 2022. The unrecognized compensation expense will be recognized over the weighted average remaining vesting period of 1.6 years.

Income (Loss) Per Share

Basic income (loss) per share of Class A common stock is computed by dividing net income (loss) attributable to Solaris Inc. by the weighted-average number of shares of Class A common stock outstanding during the same period. Diluted income (loss) per share is computed giving effect to all potentially dilutive shares.

The following table sets forth the calculation of income (loss) per share for the three months ended March 31, 2022 and 2021:

	Three Months Ended March 31,
Basic net income (loss) per share:	2022		2021
Numerator
Net income (loss) attributable to Solaris	$	3.5	$	(1.2)
Income (loss) attributable to participating securities (1)		(0.1)		(0.1)
Net income (loss) attributable to common stockholders	$	3.4	$	(1.3)
Denominator
Weighted average number of unrestricted outstanding common shares used to calculate basic net income (loss) per share		31,239		29,957
Diluted weighted-average shares of Class A common stock outstanding used to calculate diluted net income (loss) per share		31,239		29,957
Income (loss) per share of Class A common stock - basic	$	0.11	$	(0.04)
Income (loss) per share of Class A common stock - diluted	$	0.11	$	(0.04)

(1) The Company’s restricted shares of common stock are participating securities.

The following number of weighted-average potentially dilutive shares were excluded from the calculation of diluted loss per share because the effect of including such potentially dilutive shares would have been antidilutive upon conversion:

	Three Months Ended March 31,
	2022		2021
Class B common stock		13,769		14,729
Restricted stock awards		44		113
Stock Options		7		10
Total		13,820		14,852

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Income Taxes

3 Months Ended

Mar. 31, 2022

Income Taxes

Income Taxes

6. Income Taxes

Income Taxes

Solaris Inc. is a corporation and, as a result, is subject to United States federal, state and local income taxes. Solaris LLC is treated as a partnership for United States federal income tax purposes and therefore does not pay United States federal income tax on its taxable income. Instead, the Solaris LLC unitholders, including Solaris Inc., are liable for United States federal income tax on their respective shares of Solaris LLC’s taxable income reported on the unitholders’ United States federal income tax returns. Solaris LLC is liable for income taxes in those states not recognizing its status as a partnership for United States federal income tax purposes.

For the three months ended March 31, 2022 and 2021, we recognized a combined United States federal and state (expense)/benefit for income taxes of ($1.6) and ($0.2), respectively. The effective combined United States federal and state income tax rates were 22.3% and 10.0% for the three months ended March 31, 2022 and 2021, respectively. For the three months ended March 31, 2022 and 2021, our effective tax rate differed from the statutory rate primarily due to Solaris LLC’s treatment as a partnership for United States federal income tax purposes.

The Company’s deferred tax position reflects the net tax effects of the temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax reporting. The largest components of the Company’s deferred tax position relate to the Company’s investment in Solaris LLC and net

operating loss carryovers. The Company recorded a deferred tax asset and additional paid-in capital for the difference between the book value and the tax basis of the Company’s investment in Solaris LLC. This difference originates from the equity offerings of Class A common stock, exchanges of Solaris LLC Units (together with a corresponding number of shares of Class B common stock) for shares of Class A common stock, and issuances of Class A common stock, and corresponding Solaris LLC Units, in connection with stock-based compensation.

Based on our cumulative earnings history and forecasted future sources of taxable income, we believe that we will be able to realize our deferred tax assets in the future. As the Company reassesses this position in the future, changes in cumulative earnings history, excluding non-recurring charges, or changes to forecasted taxable income may alter this expectation and may result in an increase in the valuation allowance and an increase in the effective tax rate.

Section 382 of the Internal Revenue Code of 1986, contains rules that limit the ability of a company that undergoes an “ownership change” to utilize its net operating loss and tax credit carryovers and certain built-in losses recognized in years after the “ownership change.” An “ownership change” is generally defined as any change in ownership of more than 50% of a corporation’s stock over a rolling three-year period by stockholders that own (directly or indirectly) 5% or more of the stock of a corporation, or arising from a new issuance of stock by a corporation. If an ownership change occurs, Section 382 generally imposes an annual limitation on the use of pre-ownership change net operating loss carryovers to offset taxable income earned after the ownership change. We do not believe the Section 382 annual limitation related to historical ownership changes impacts our ability to utilize our net operating losses; however, if we were to experience a future ownership change our ability to use net operating losses may be impacted.

Payables Related to the Tax Receivable Agreement

As of March 31, 2022, our liability under the Tax Receivable Agreement was $73,102, representing 85% of the net cash savings in United States federal, state and local income tax or franchise tax that Solaris Inc. anticipates realizing in future years from certain increases in tax basis and certain tax benefits attributable to imputed interest as a result of Solaris Inc.’s acquisition (or deemed acquisition for United States federal income tax purposes) of Solaris LLC Units in connection with the IPO or pursuant to an exercise of the Redemption Right or the Call Right (each as defined in the Solaris LLC Agreement) and additional tax basis arising from any payments Solaris Inc. makes under the Tax Receivable Agreement.

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Concentrations

3 Months Ended

Mar. 31, 2022

Concentrations

Concentrations

7.  Concentrations

For the three months ended March 31, 2022, one customer accounted for 29% of the Company’s revenues. For the three months ended March 31, 2021, two customers accounted for 26% of the Company’s revenues. As of March 31, 2022, two customers accounted for 44% of the Company’s accounts receivable. As of December 31, 2021, two customers accounted for 29% and 13% of the Company’s accounts receivable, respectively.

For the three months ended March 31, 2022, one supplier accounted for 11% of the Company’s total purchases. For the three months ended March 31, 2021, one supplier accounted for 12% of the Company’s total purchases. As of March 31, 2022, one supplier accounted for 11% of the Company’s accounts payable. As of December 31, 2021, no supplier accounted for 10% of the Company’s accounts payable.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2022

Commitments and Contingencies

Commitments and Contingencies

8.  Commitments and Contingencies

In the normal course of business, the Company is subjected to various claims, legal actions, contract negotiations and disputes. The Company provides for losses, if any, in the year in which they can be reasonably estimated. In management’s opinion, there are currently no such matters outstanding that would have a material effect on the accompanying condensed consolidated financial statements.

See Note 9 “Related Party Transactions” for contingent payments related to contracts with customers.

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Related Party Transactions

3 Months Ended

Mar. 31, 2022

Related Party Transactions

Related Party Transactions

9.  Related Party Transactions

The Company recognizes certain costs incurred in relation to transactions incurred in connection with the amended and restated administrative services agreement, dated May 17, 2017, between Solaris LLC and Solaris Energy

Management, LLC, a company owned by William A. Zartler, the Chief Executive Officer and Chairman of the Board. These services include rent paid for office space, travel services, personnel, consulting and administrative costs. For the three months ended March 31, 2022 and 2021, Solaris LLC paid $0.2 and $0.2, respectively, for these services. As of March 31, 2022, and December 31, 2021, the Company included $0.1 and $0.1, respectively, in prepaid expenses and other current assets on the condensed consolidated balance sheets. Additionally, as of March 31, 2022 and December 31, 2021, the Company included $0.1 and $0.1, respectively, of accruals to related parties in accrued liabilities on the consolidated balance sheet.

The Company has executed a guarantee of lease agreement with Solaris Energy Management, LLC, a related party of the Company, related to the rental of office space for the Company’s corporate headquarters. The total future guaranty under the guarantee of lease agreement with Solaris Energy Management, LLC is $4.3 as of March 31, 2022.

On March 26, 2021, THRC Holdings, LP (“THRC”), purchased shares representing an 8.5% ownership of the Company’s Class A common stock and 5.9% total shares outstanding as of December 31, 2021. On February 10, 2022, THRC purchased additional shares representing a total ownership of 10.3% of the Company’s Class A common stock and 7.2% total shares outstanding as of December 31, 2021. THRC is affiliated with certain of the Company’s customers, including ProFrac Services, LLC (“ProFrac”) and certain of the Company’s suppliers including Automatize Logistics, LLC, IOT-EQ, LLC and Cisco Logistics, LLC (“Cisco”) (together the “THRC Affiliates”). For the three months ended March 31, 2022, the Company recognized revenues related to our service offering provided to the THRC Affiliates of $5.1. Accounts receivable related to THRC Affiliates as of March 31, 2022, were $4.8. For the three months ended March 31, 2022, the Company recognized cost of services provided by THRC Affiliates of $0.8. There was $0.1 accounts payable related to THRC Affiliates as of March 31, 2022.

Solaris is a dedicated wellsite sand storage provider (“Services”) to certain THRC Affiliates. Solaris provides volume-based pricing for the Services and may be required to pay up to $4.0 in payments throughout a term ending in 2024, contingent upon the ability of these affiliates to meet minimum Services revenue thresholds. During the first quarter of 2022, Solaris paid $0.5 related to these Services, which was recognized in revenues.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2022

Summary of Significant Accounting Policies

Basis of Presentation and Consolidation

Basis of Presentation and Consolidation

Solaris Oilfield Infrastructure, Inc. (either individually or together with its subsidiaries, as the context requires “Solaris Inc.” or the “Company”) is the managing member of Solaris Oilfield Infrastructure, LLC (“Solaris LLC”) and is responsible for all operational, management and administrative decisions relating to Solaris LLC’s business. Solaris Inc. consolidates the financial results of Solaris LLC and its subsidiaries and reports non-controlling interest related to the portion of the units in Solaris LLC (the “Solaris LLC Units”) not owned by Solaris Inc., which will reduce net income attributable to the holders of Solaris Inc.’s Class A common stock.

The accompanying interim unaudited condensed consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”). These financial statements reflect all normal recurring adjustments that are necessary for fair presentation. Operating results for the three months ended March 31, 2022 and 2021 are not necessarily indicative of the results that may be expected for the full year or for any interim period.

The unaudited interim condensed consolidated financial statements do not include all information or notes required by GAAP for annual financial statements and should be read together with Solaris Inc.’s Annual Report on Form 10-K for the year ended December 31, 2021 and notes thereto.

All material intercompany transactions and balances have been eliminated upon consolidation.

Use of Estimates

Use of Estimates

The preparation of consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

The most significant estimates relate to stock-based compensation, useful lives and salvage values of long-lived assets, future cash flows associated with goodwill and long-lived asset impairment, net realizable value of inventory, income taxes, Tax Receivable Agreement liability, collectability of accounts receivable and estimates of allowance for credit losses and determination of the present value of lease payments and right-of-use assets.

Revenue Recognition

Revenue Recognition

The Company recognizes revenue in accordance with ASC Topic 606, Revenues from Contracts with Customers (“ASC Topic 606”). Under ASC Topic 606, revenue recognition is based on the transfer of control, or the customer’s ability to benefit from our services and products in an amount that reflects the consideration expected to be received in exchange for those services and products.

The majority of our contracts contain multiple performance obligations, such as work orders containing a combination of equipment, transportation, and labor services. We allocate the transaction price to each performance obligation identified in the contract based on relative stand-alone selling prices, or estimates of such prices, and recognize the related revenue as control of each individual product or service is transferred to the customer, in satisfaction of the corresponding performance obligations. We measure progress using an input method based on resources consumed or expended relative to the total resources expected to be consumed or expended. We assess our customers’ ability and intention to pay, which is based on a variety of factors including historical payment experience and financial condition and we typically charge our customers on a weekly or monthly basis. Contracts with customers are typically on thirty- to sixty-day payment terms.

Disaggregation of Revenue

The following table summarizes revenues from our contracts disaggregated by revenue generating activity contained therein for the quarters ended March 31, 2022 and 2021:

	Three Months Ended March 31,
	2022		2021
Wellsite services	$	56.6	$	28.4
Transloading and Other		0.3		0.3
Total revenue	$	56.9	$	28.7

Recently Issued Accounting Standards

Recently Issued Accounting Standards

In March 2020, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) No. 2020-04, Reference Rate Reform, which provides temporary optional guidance to companies impacted by the transition away from the London Interbank Offered Rate (“LIBOR”). The guidance provides certain expedients and exceptions to applying GAAP in order to lessen the potential accounting burden when contracts, hedging relationships, and other transactions that reference LIBOR as a benchmark rate are modified. This guidance is effective upon issuance and expires on December 31, 2022. The Company is currently assessing the impact of the LIBOR transition and this ASU on the Company’s financial statements and any agreements utilizing LIBOR, including the Tax Receivable Agreement, but does not currently expect to have a material impact on our financial statements.

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Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2022

Summary of Significant Accounting Policies

Schedule of disaggregated revenues from contracts

	Three Months Ended March 31,
	2022		2021
Wellsite services	$	56.6	$	28.4
Transloading and Other		0.3		0.3
Total revenue	$	56.9	$	28.7

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Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2022

Property, Plant and Equipment

Schedule of property plant and equipment

	March 31,		December 31,
	2022		2021
Systems and related equipment	$	309.3	$	306.6
Systems in process		31.1		19.9
Computer hardware and software		1.3		1.2
Machinery and equipment		5.4		5.4
Vehicles		5.7		5.6
Buildings		4.4		4.4
Land		0.6		0.6
Furniture and fixtures		0.4		0.4
Property, plant and equipment, gross	$	358.2	$	344.1
Less: accumulated depreciation		(110.6)		(104.0)
Property, plant and equipment, net	$	247.6	$	240.1

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Equity (Tables)

3 Months Ended

Mar. 31, 2022

Equity

Summary of activity related to restricted stock

	Restricted Stock Awards
	2022	2021
Unvested at January 1,	847,315	703,115
Awarded	884,983	414,185
Vested	(366,250)	(223,275)
Forfeited	(804)	(5,388)
Unvested at March 31,	1,365,244	888,637

Schedule of earnings per share calculation

	Three Months Ended March 31,
Basic net income (loss) per share:	2022		2021
Numerator
Net income (loss) attributable to Solaris	$	3.5	$	(1.2)
Income (loss) attributable to participating securities (1)		(0.1)		(0.1)
Net income (loss) attributable to common stockholders	$	3.4	$	(1.3)
Denominator
Weighted average number of unrestricted outstanding common shares used to calculate basic net income (loss) per share		31,239		29,957
Diluted weighted-average shares of Class A common stock outstanding used to calculate diluted net income (loss) per share		31,239		29,957
Income (loss) per share of Class A common stock - basic	$	0.11	$	(0.04)
Income (loss) per share of Class A common stock - diluted	$	0.11	$	(0.04)

(1) The Company’s restricted shares of common stock are participating securities.

Schedule of antidilutive shares

	Three Months Ended March 31,
	2022		2021
Class B common stock		13,769		14,729
Restricted stock awards		44		113
Stock Options		7		10
Total		13,820		14,852

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Summary of Significant Accounting Policies - Revenues Disaggregated (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 56,915	$ 28,669
Wellsite services
Disaggregation of Revenue [Line Items]
Revenue	56,600	28,400
Transloading and Other
Disaggregation of Revenue [Line Items]
Revenue	$ 300	$ 300

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Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment
Property, plant and equipment, gross	$ 358,200	$ 344,100
Less: accumulated depreciation	(110,600)	(104,000)
Property, plant and equipment, net	247,622	240,091
Systems and related equipment
Property, Plant and Equipment
Property, plant and equipment, gross	309,300	306,600
Systems in process
Property, Plant and Equipment
Property, plant and equipment, gross	31,100	19,900
Computer hardware and software
Property, Plant and Equipment
Property, plant and equipment, gross	1,300	1,200
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	5,400	5,400
Vehicles
Property, Plant and Equipment
Property, plant and equipment, gross	5,700	5,600
Buildings
Property, Plant and Equipment
Property, plant and equipment, gross	4,400	4,400
Land
Property, Plant and Equipment
Property, plant and equipment, gross	600	600
Furniture and fixtures
Property, Plant and Equipment
Property, plant and equipment, gross	$ 400	$ 400

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Debt (Details) - 2019 Credit Agreement - USD ($) $ in Millions	Feb. 24, 2022	Apr. 26, 2019	Mar. 31, 2022
Debt
Maximum borrowing		$ 50.0
Potential additional borrowing available		25.0
Maximum borrowing capacity with accordion option		75.0
Cash adjustment to net indebtedness		$ 3.0
Cash threshold triggering repayment	$ 20.0
Outstanding credit facility			$ 0.0
Remaining borrowing capacity			$ 50.0
Senior indebtedness to consolidated EBITDA		2.50
Eligible accounts (as a percent)		100.00%
Eligible accounts to revolving exposure ratio		1.00
Leverage ratio for debt repayment		2.00
Cash threshold over a period of time triggering repayment	$ 5.0
Period for cash threshold repayment trigger	180 days
Maximum capital expenditures allowed	$ 100.0
Ratio of consolidated EBITDA to fixed charges		2.75%
Minimum
Debt
Commitment fee (as a percent)	0.375%
Maximum
Debt
Commitment fee (as a percent)	0.50%
SOFR | Minimum
Debt
Applicable margin rate	2.75%
SOFR | Maximum
Debt
Applicable margin rate	3.50%
Alternate base rate | Minimum
Debt
Applicable margin rate	1.75%
Alternate base rate | Maximum
Debt
Applicable margin rate	2.50%

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Equity - Dividends (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Equity
Distributions paid to unit holders	$ 4,887	$ 4,797
Distribution received	3,400	3,300
Solaris LLC
Equity
Distributions paid to unit holders	$ 4,900	$ 4,800

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Equity - SBC (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2022
Stock-based compensation
Proceeds from stock option exercises	$ 12
Available for grant (in shares)		1,678,322
Class A Common Stock
Stock-based compensation
Reserved for issuance (in shares)		5,118,080

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Equity - Restricted stock (Details) - Restricted stock awards - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Number of Shares
Unvested, beginning (in shares)	847,315	703,115
Awarded (in shares)	884,983	414,185
Vested (in shares)	(366,250)	(223,275)
Forfeited (in shares)	(804)	(5,388)
Unvested, end (in shares)	1,365,244	888,637
Other non-option information
Unrecognized compensation costs	$ 12.6
Expected period for recognizing compensation expense	1 year 7 months 6 days
First vesting period
Number of Shares
Unvested, end (in shares)	73,658
Second vesting period
Number of Shares
Unvested, end (in shares)	552,060
Third vesting period
Number of Shares
Unvested, end (in shares)	453,149
Fourth vesting period
Number of Shares
Unvested, end (in shares)	286,377

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Equity - EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator
Net income (loss) attributable to Solaris	$ 3,502	$ (1,169)
Income (loss) attributable to participating securities	(100)	(100)
Net income (loss) attributable to common stockholders	$ 3,400	$ (1,300)
Class A Common Stock
Denominator
Weighted average number of unrestricted outstanding common shares used to calculate basic net income (loss) per share	31,239	29,957
Diluted weighted-average shares of Class A common stock outstanding (in shares)	31,239	29,957
Income (loss) per share of Class A common stock - basic (in dollars per share)	$ 0.11	$ (0.04)
Income (loss) per share of Class A common stock - diluted (in dollars per share)	$ 0.11	$ (0.04)

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Equity - Antidilutive (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Potentially dilutive shares
Excluded from EPS calculation (in shares)	13,820	14,852
Class B Common Stock
Potentially dilutive shares
Excluded from EPS calculation (in shares)	13,769	14,729
Restricted stock awards
Potentially dilutive shares
Excluded from EPS calculation (in shares)	44	113
Stock options
Potentially dilutive shares
Excluded from EPS calculation (in shares)	7	10

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Income Taxes - Quarter (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income tax (expense) benefit	$ (1,612)	$ 213
Effective tax rate	22.30%	10.00%
Tax Receivable Agreement
Benefit of remaining cash savings (as a percent)	85.00%
Payables related to Tax Receivable Agreement	$ 73,102

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Concentrations (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Revenue | Customer | One Customer
Concentrations
Concentration risk (as a percent)	29.00%
Revenue | Customer | Two Customers
Concentrations
Concentration risk (as a percent)		26.00%
Accounts receivable | Customer | One Customer
Concentrations
Concentration risk (as a percent)			29.00%
Accounts receivable | Customer | Two Customers
Concentrations
Concentration risk (as a percent)	44.00%		13.00%
Purchases | Supplier | One Supplier
Concentrations
Concentration risk (as a percent)		12.00%
Purchases | Supplier | One Customer
Concentrations
Concentration risk (as a percent)	11.00%
Accounts payables | Supplier | One Supplier
Concentrations
Concentration risk (as a percent)	11.00%

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Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Feb. 10, 2022	Dec. 31, 2021	Mar. 26, 2021
William A. Zartler
Related Party Transactions
Payment made to related party	$ 0.2	$ 0.2
Due from related party	0.1			$ 0.1
Due to related party	0.1			$ 0.1
Solaris Energy Management, LLC
Related Party Transactions
Other commitments	4.3
THRC Affiliates
Related Party Transactions
Due from related party	4.8
Due to related party	0.1
Revenue from related party	5.1
Related party costs	0.8
THRC Affiliates - Services
Related Party Transactions
Other commitments	4.0
Revenue from related party	$ 0.5
THRC
Related Party Transactions
Voting power (as a percent)			7.20%		5.90%
THRC | Solaris Oilfield Infrastructure
Related Party Transactions
Noncontrolling interest (as a percent)			10.30%		8.50%