10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the quarterly period ended September 30, 2021

OR

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

Commission File Number 001-38919

Rattler Midstream LP

(Exact Name of Registrant As Specified in Its Charter)

DE		83-1404608
(State or Other Jurisdiction of Incorporation or Organization)		(I.R.S. Employer Identification Number)
500 West Texas
Suite 1200
Midland,	TX	79701
(Address of principal executive offices)		(Zip code)

(432) 221-7400

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Units	RTLR	The Nasdaq Stock Market LLC
		(NASDAQ Global Select Market)

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 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, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check One):

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 October 29, 2021, the registrant had outstanding 39,905,768 common units representing limited partner interests and 107,815,152 Class B units representing limited partner interests.

RATTLER MIDSTREAM LP

FORM 10-Q

FOR THE QUARTER ENDED SEPTEMBER 30, 2021

TABLE OF CONTENTS

	Page
Glossary of Oil and Natural Gas Terms	ii
Glossary of Certain Other Terms	iii
Cautionary Statement Regarding Forward-Looking Statements	iv
PART I. FINANCIAL INFORMATION
Item 1. Condensed Consolidated Financial Statements (Unaudited)	1
Condensed Consolidated Balance Sheets	1
Condensed Consolidated Statements of Operations	2
Condensed Consolidated Statements of Comprehensive Income	3
Condensed Consolidated Statements of Changes in Unitholders’ Equity	4
Condensed Consolidated Statements of Cash Flows	6
Condensed Notes to Consolidated Financial Statements	7
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	20
Item 3. Quantitative and Qualitative Disclosures About Market Risk	30
Item 4. Controls and Procedures	31
PART II. OTHER INFORMATION
Item 1. Legal Proceedings	31
Item 1A. Risk Factors	31
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	32
Item 6. Exhibits	33
Signatures	34

i

GLOSSARY OF OIL AND NATURAL GAS TERMS

The following is a glossary of certain oil and natural gas industry terms used in this Quarterly Report on Form 10-Q (this “report”):

Basin	A large depression on the earth’s surface in which sediments accumulate.
Bbl or barrel	One stock tank barrel, or 42 U.S. gallons liquid volume, used in reference to crude oil, natural gas liquids or other liquid hydrocarbons.
Bbl/d	Bbl per day.
British Thermal Unit or Btu	The quantity of heat required to raise the temperature of one pound of water by one degree Fahrenheit.
Completion	The process of treating a drilled well, followed by the installation of permanent equipment for the production of natural gas or oil or, in the case of a dry hole, the reporting of abandonment to the appropriate agency.
Crude oil	Liquid hydrocarbons found in the earth, which may be refined into fuel sources.
Dry hole or dry well	A well found to be incapable of producing hydrocarbons in sufficient quantities such that proceeds from the sale of such production exceed production expenses and taxes.
Hydrocarbon	An organic compound containing only carbon and hydrogen.
Mcf	One thousand cubic feet of natural gas.
Mcf/d	One thousand cubic feet of natural gas per day.
MMcf	One million cubic feet of natural gas.
MMcf/d	One million cubic feet of natural gas per day.
MMBtu	One million British Thermal Units.
MMBtu/d	One million British Thermal Units per day.
Natural gas	Hydrocarbon gas found in the earth, composed of methane, ethane, butane, propane and other gases.
Operator	The individual or company responsible for the exploration and/or production of a crude oil or natural gas well or lease.
Reserves	Estimated remaining quantities of crude oil and natural gas and related substances anticipated to be economically producible, as of a given date, by application of development projects to known accumulations. In addition, there must exist, or there must be a reasonable expectation that there will exist, the legal right to produce or a revenue interest in the production, installed means of delivering crude oil and natural gas or related substances to the market and all permits and financing required to implement the project. Reserves should not be assigned to adjacent reservoirs isolated by major, potentially sealing, faults until those reservoirs are penetrated and evaluated as economically producible. Reserves should not be assigned to areas that are clearly separated from a known accumulation by a non-productive reservoir (i.e., potentially recoverable resources from undiscovered accumulations).
Reservoir	A porous and permeable underground formation containing a natural accumulation of producible natural gas and/or crude oil that is confined by impermeable rock or water barriers and is separate from other reservoirs.
Throughput	The volume of product transported or passing through a pipeline, plant, terminal or other facility.

ii

GLOSSARY OF CERTAIN OTHER TERMS

The following is a glossary of certain other terms used in this report:

ASU	Accounting Standards Update.
ASC	Accounting Standards Codification.
Diamondback	Diamondback Energy, Inc., a Delaware corporation, and its subsidiaries other than the Partnership and its subsidiaries (including the Operating Company).
Exchange Act	The Securities Exchange Act of 1934, as amended.
FASB	Financial Accounting Standards Board.
GAAP	Accounting principles generally accepted in the United States.
General Partner	Rattler Midstream GP LLC, a Delaware limited liability company; the general partner of the Partnership and a wholly owned subsidiary of Diamondback.
LIBOR	The London interbank offered rate.
LTIP	Rattler Midstream LP Long Term Incentive Plan.
Nasdaq	The Nasdaq Global Select Market.
Notes	The 5.625% Senior Notes due 2025 issued on July 14, 2020.
OPEC	Organization of the Petroleum Exporting Countries.
Operating Company	Rattler Midstream Operating LLC, a Delaware limited liability company and a consolidated subsidiary of the Partnership.
Partnership	Rattler Midstream LP, a Delaware limited partnership.
Partnership agreement	The first amended and restated agreement of limited partnership, dated May 28, 2019.
SEC	Securities and Exchange Commission.
Securities Act	The Securities Act of 1933, as amended.

iii

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

Various statements contained in this report that express a belief, expectation, or intention, or that are not statements of historical fact, are forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. These forward-looking statements are subject to a number of risks and uncertainties, many of which are beyond our control. All statements, other than statements of historical fact, regarding our strategy, future operations, financial position, estimated revenues and losses, projected costs, prospects, plans and objectives of management are forward-looking statements. When used in this report, the words “could,” “believe,” “anticipate,” “intend,” “estimate,” “expect,” “may,” “continue,” “predict,” “potential,” “project,” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain such identifying words. In particular, the factors discussed in this report and our Annual Report on Form 10-K for the year ended December 31, 2020 could affect our actual results and cause our actual results to differ materially from expectations, estimates or assumptions expressed, forecasted or implied in such forward-looking statements. Unless the context requires otherwise, references to “we,” “us,” “our” or the “Partnership” are intended to mean the business and operations of the Partnership and its consolidated subsidiaries.

Forward-looking statements may include statements about:

•Diamondback’s ability to meet its drilling and development plans on a timely basis or at all;

•the volatility of realized oil and natural gas prices, including in Diamondback’s area of operation in the Permian Basin;

•the implications and logistical challenges of epidemic or pandemic diseases, including the COVID-19 pandemic and its impact on the oil and natural gas industry pricing and demand for oil and natural gas and supply chain logistics;

•changes in general economic, business or industry conditions;

•conditions in the capital, financial and credit markets;

•competitive conditions in our industry and the effect of U.S. energy, environmental, monetary and trade policies on our industry and business;

•actions taken by third party operators, gatherers, processors and transporters;

•the demand for and costs of conducting midstream infrastructure services;

•our ability to successfully implement our business plan;

•our ability to complete internal growth projects on time and on budget;

•our ability to identify, complete and effectively integrate acquisitions into our operations, including the pending drop down acquisition discussed elsewhere in this report;

•our ability to achieve anticipated synergies, system optionality and accretion associated with acquisitions;

•the impact of potential impairment charges;

•the results of our investments in joint ventures;

•competition from the same and alternative energy sources;

•energy efficiency and technology trends;

•operating hazards and other risks incidental to our midstream services;

•natural disasters, weather-related delays, casualty losses and other matters beyond our control;

•the impact of severe weather conditions on Diamondback’s production volumes;

•increases in our tax liability;

•the conditions impacting the timing and amount of common units repurchased under our common unit repurchase program;

•the effect of existing and future laws and government regulations;

•the effects of future litigation; and

•certain other factors discussed elsewhere in this report.

iv

All forward-looking statements speak only as of the date of this report or, if earlier, as of the date they were made. We do not intend to, and disclaim any obligation to, update or revise any forward-looking statements unless required by securities laws. You should not place undue reliance on these forward-looking statements. Moreover, we operate in a very competitive and rapidly changing environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. Although we believe that our plans, intentions and expectations reflected in or suggested by the forward-looking statements we make in this report are reasonable, we can give no assurance that these plans, intentions or expectations will be achieved or occur, and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements.

v

PART I. FINANCIAL INFORMATION

ITEM 1.     CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

Rattler Midstream LP

Condensed Consolidated Balance Sheets

(Unaudited)

	September 30,		December 31,
	2021		2020
	(In thousands)
Assets
Current assets:
Cash	$	13,080	$	23,927
Accounts receivable—related party	47,094		57,447
Accounts receivable—third party, net	11,042		5,658
Sourced water inventory	9,668		10,108
Assets held for sale	83,285		—
Other current assets	658		1,127
Total current assets	164,827		98,267
Property, plant and equipment:
Land	85,826		85,826
Property, plant and equipment	922,650		1,012,777
Accumulated depreciation, amortization and accretion	(111,995)		(100,728)
Property, plant and equipment, net	896,481		997,875
Right of use assets	59		574
Equity method investments	509,174		532,927
Real estate assets, net	85,339		96,687
Intangible lease assets, net	3,771		4,262
Deferred tax asset	65,016		73,264
Other assets	3,924		4,732
Total assets	$	1,728,591	$	1,808,588
Liabilities and Unitholders’ Equity
Current liabilities:
Accounts payable and accrued liabilities	$	41,125	$	42,647
Taxes payable	655		192
Short-term lease liability	59		574
Asset retirement obligations	79		35
Total current liabilities	41,918		43,448
Long-term debt	492,456		569,947
Asset retirement obligations	16,476		15,093
Total liabilities	550,850		628,488
Commitments and contingencies (Note 15)
Unitholders’ equity:
General partner—Diamondback	839		899
Common units—public (39,960,128 units issued and outstanding as of September 30, 2021 and 42,356,637 units issued and outstanding as of December 31, 2020)	364,985		385,189
Class B units—Diamondback (107,815,152 units issued and outstanding as of September 30, 2021 and as of December 31, 2020)	839		899
Accumulated other comprehensive income (loss)	10		(123)
Total Rattler Midstream LP unitholders’ equity	366,673		386,864
Non-controlling interest	811,068		793,638
Non-controlling interest in accumulated other comprehensive income (loss)	—		(402)
Total equity	1,177,741		1,180,100
Total liabilities and unitholders’ equity	$	1,728,591	$	1,808,588

See accompanying notes to condensed consolidated financial statements.

1

Rattler Midstream LP

Condensed Consolidated Statements of Operations

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands, expect per unit amounts)
Revenues:
Revenues—related party	$	87,613	$	85,846	$	266,270	$	280,460
Revenues—third party	5,885		7,229		19,973		23,504
Other income—related party	2,080		2,431		7,162		5,419
Other income—third party	992		1,033		3,104		5,286
Total revenues	96,570		96,539		296,509		314,669
Costs and expenses:
Direct operating expenses	22,335		31,173		81,145		101,425
Cost of goods sold (exclusive of depreciation and amortization)	10,951		6,663		30,060		27,368
Real estate operating expenses	558		494		1,619		1,812
Depreciation, amortization and accretion	11,443		10,990		37,928		35,596
Impairment and abandonments	—		—		3,371		—
General and administrative expenses	5,338		3,140		14,928		11,829
(Gain) loss on disposal of assets	1,144		(16)		6,155		2,765
Total costs and expenses	51,769		52,444		175,206		180,795
Income (loss) from operations	44,801		44,095		121,303		133,874
Other income (expense):
Interest income (expense), net	(8,172)		(5,817)		(23,717)		(10,364)
Gain (loss) on sale of equity method investments	31		—		23,020		—
Income (loss) from equity method investments	4,825		3,369		6,474		(9,910)
Total other income (expense), net	(3,316)		(2,448)		5,777		(20,274)
Net income (loss) before income taxes	41,485		41,647		127,080		113,600
Provision for (benefit from) income taxes	2,551		2,851		7,761		7,754
Net income (loss)	38,934		38,796		119,319		105,846
Less: Net income (loss) attributable to non-controlling interest	30,449		29,578		92,374		80,775
Net income (loss) attributable to Rattler Midstream LP	$	8,485	$	9,218	$	26,945	$	25,071
Net income (loss) attributable to limited partners per common unit:
Basic	$	0.20	$	0.20	$	0.62	$	0.53
Diluted	$	0.20	$	0.20	$	0.62	$	0.53
Weighted average number of limited partner common units outstanding:
Basic	40,542		43,996		41,101		43,837
Diluted	40,542		43,996		41,101		43,837

See accompanying notes to condensed consolidated financial statements.

2

Rattler Midstream LP

Condensed Consolidated Statements of Comprehensive Income

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Net income (loss)	$	38,934	$	38,796	$	119,319	$	105,846
Other comprehensive income (loss):
Change in accumulated other comprehensive income (loss) of equity method investees attributable to non-controlling interest	—		306		402		(70)
Change in accumulated other comprehensive income (loss) of equity method investees attributable to limited partner	—		97		133		(25)
Total other comprehensive income (loss)	—		403		535		(95)
Comprehensive income (loss)	$	38,934	$	39,199	$	119,854	$	105,751

See accompanying notes to condensed consolidated financial statements.

3

Rattler Midstream LP

Condensed Consolidated Statements of Changes in Unitholders’ Equity

(Unaudited)

	Limited Partners						General Partner		Non-Controlling Interest		Accumulated Other Comprehensive Income		Non-Controlling Interest-Accumulated Other Comprehensive Income
	Common Units	Amount		Class B Units	Amount		Amount		Amount		Amount		Amount		Total
	(In thousands)
Balance at December 31, 2020	42,357	$	385,189	107,815	$	899	$	899	$	793,638	$	(123)	$	(402)	$	1,180,100
Repurchased units as part of unit buyback	(1,082)	(11,114)		—	—		—		—		—		—		(11,114)
Unit-based compensation	—	2,332		—	—		—		—		—		—		2,332
Issuance of common units	3	—		—	—		—		—		—		—		—
Other comprehensive income (loss)	—	—		—	—		—		—		93		299		392
Change in ownership of consolidated subsidiaries, net	—	712		—	—		—		(908)		—		—		(196)
Cash paid for tax withholding on vested common units	—	(21)		—	—		—		—		—		—		(21)
Distribution equivalent rights payments	—	(418)		—	—		—		—		—		—		(418)
Distributions	—	(8,263)		—	(20)		(20)		(21,563)		—		—		(29,866)
Net income (loss)	—	6,015		—	—		—		19,893		—		—		25,908
Balance at March 31, 2021	41,278	374,432		107,815	879		879		791,060		(30)		(103)		1,167,117
Repurchased units as part of unit buyback	(475)	(5,198)		—	—		—		—		—		—		(5,198)
Unit-based compensation	—	2,485		—	—		—		—		—		—		2,485
Issuance of common units	273	—		—	—		—		—		—		—		—
Other comprehensive income (loss)	—	—		—	—		—		—		40		103		143
Change in ownership of consolidated subsidiaries, net	—	1,941		—	—		—		(2,476)		—		—		(535)
Cash paid for tax withholding on vested common units	—	(1,693)		—	—		—		—		—		—		(1,693)
Distribution equivalent rights payments	—	(456)		—	—		—		—		—		—		(456)
Distributions	—	(8,183)		—	(20)		(20)		(21,563)		—		—		(29,786)
Net income (loss)	—	12,445		—	—		—		42,032		—		—		54,477
Balance at June 30, 2021	41,076	375,773		107,815	859		859		809,053		10		—		1,186,554
Repurchased units as part of unit buyback	(1,148)	(12,312)		—	—		—		—		—		—		(12,312)
Unit-based compensation	—	2,491		—	—		—		—		—		—		2,491
Issuance of common units	32	—		—	—		—		—		—		—		—
Other comprehensive income (loss)	—	—		—	—		—				—		—		—
Change in ownership of consolidated subsidiaries, net	—	1,160		—	—		—		(1,480)		—		—		(320)
Cash paid for tax withholding on vested common units	—	—		—	—		—		—		—		—		—
Distribution equivalent rights payments	—	(458)		—	—		—		—		—		—		(458)
Distributions	—	(10,154)		—	(20)		(20)		(26,954)		—		—		(37,148)
Net income (loss)	—	8,485		—	—		—		30,449		—		—		38,934
Balance at September 30, 2021	39,960	$	364,985	107,815	$	839	$	839	$	811,068	$	10	$	—	$	1,177,741

See accompanying notes to condensed consolidated financial statements.

4

Rattler Midstream LP

Condensed Consolidated Statements of Changes in Unitholders’ Equity - Continued

(Unaudited)

	Limited Partners						General Partner		Non-Controlling Interest		Accumulated Other Comprehensive Income		Non-Controlling Interest-Accumulated Other Comprehensive Income
	Common Units	Amount		Class B Units	Amount		Amount		Amount		Amount		Amount		Total
	(In thousands)
Balance at December 31, 2019	43,700	$	737,777	107,815	$	979	$	979	$	376,928	$	(198)	$	(625)	$	1,115,840
Unit-based compensation	—	2,219		—	—		—		—		—		—		2,219
Distribution equivalent rights payments	—	(652)		—	—		—		—		—		—		(652)
Other comprehensive income (loss)	—	—		—	—		—		—		(63)		(195)		(258)
Distributions	—	(12,673)		—	(20)		(20)		(31,266)		—		—		(43,979)
Net income (loss)	—	13,031		—	—		—		41,557		—		—		54,588
Balance at March 31, 2020	43,700	739,702		107,815	959		959		387,219		(261)		(820)		1,127,758
Unit-based compensation	450	2,120		—	—		—		—		—		—		2,120
Distribution equivalent rights payments	—	(644)		—	—		—		—		—		—		(644)
Other comprehensive income (loss)	—	—		—	—		—		—		(59)		(181)		(240)
Distributions	—	(12,673)		—	(20)		(20)		(31,267)		—		—		(43,980)
Change in ownership of consolidated subsidiaries, net	—	(329,034)		—	—		—		419,647		—		—		90,613
Units repurchased for tax withholding	(154)	(1,365)		—	—		—		—		—		—		(1,365)
Net income (loss)	—	2,822		—	—		—		9,640		—		—		12,462
Balance at June 30, 2020	43,996	400,928		107,815	939		939		785,239		(320)		(1,001)		1,186,724
Unit-based compensation	—	2,216		—	—		—		—		—		—		2,216
Distribution equivalent rights payments	—	(524)		—	—		—		—		—		—		(524)
Other comprehensive income (loss)	—	—		—	—		—		—		97		306		403
Distributions	—	(12,758)		—	(20)		(20)		(31,267)		—		—		(44,065)
Net income (loss)	—	9,218		—	—		—		29,578		—		—		38,796
Balance at September 30, 2020	43,996	$	399,080	107,815	$	919	$	919	$	783,550	$	(223)	$	(695)	$	1,183,550

See accompanying notes to condensed consolidated financial statements.

5

Rattler Midstream LP

Condensed Consolidated Statements of Cash Flows

(Unaudited)

	Nine Months Ended September 30,
	2021		2020
	(In thousands)
Cash flows from operating activities:
Net income (loss)	$	119,319	$	105,846
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision for deferred income taxes	7,761		7,754
Depreciation, amortization and accretion	37,928		35,596
(Gain) loss on disposal of assets	6,155		2,765
Unit-based compensation expense	7,308		6,555
Impairment and abandonments	3,371		—
Gain (loss) on sale of equity method investments	(23,020)		—
(Income) loss from equity method investments	(6,474)		9,910
Distributions from equity method investments	23,284		—
Other	1,509		467
Changes in operating assets and liabilities:
Accounts receivable—related party	10,347		1,649
Accounts payable, accrued liabilities and taxes payable	(3,673)		117
Other	1,984		6,715
Net cash provided by (used in) operating activities	185,799		177,374
Cash flows from investing activities:
Additions to property, plant and equipment	(24,139)		(124,989)
Contributions to equity method investments	(7,069)		(89,751)
Distributions from equity method investments	9,107		27,490
Proceeds from the sale of equity method investments	23,485		—
Proceeds from the sale of real estate	9,191		—
Other	250		42
Net cash provided by (used in) investing activities	10,825		(187,208)
Cash flows from financing activities:
Proceeds from senior notes	—		500,000
Proceeds from borrowings from credit facility	44,000		179,000
Payments on credit facility	(123,000)		(518,000)
Debt issuance costs	—		(10,014)
Repurchased units as part of unit buyback	(28,624)		—
Distribution to public	(26,600)		(38,104)
Distribution to Diamondback	(70,140)		(93,860)
Other	(3,107)		(3,245)
Net cash provided by (used in) financing activities	(207,471)		15,777
Net increase (decrease) in cash	(10,847)		5,943
Cash at beginning of period	23,927		10,633
Cash at end of period	$	13,080	$	16,576
Supplemental disclosure of non-cash investing activity:
Accrued liabilities related to capital expenditures	$	35,373	$	13,689

See accompanying notes to condensed consolidated financial statements.

6

Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements

(Unaudited)

1.    ORGANIZATION AND BASIS OF PRESENTATION

Organization

The Partnership is a publicly traded Delaware limited partnership focused on owning, operating, developing and acquiring midstream infrastructure assets in the Midland and Delaware Basins of the Permian Basin.

As of September 30, 2021, the General Partner held a 100% general partner interest in the Partnership and Diamondback beneficially owned all of the Partnership’s 107,815,152 outstanding Class B units, representing approximately 73% of the Partnership’s total units outstanding. Diamondback owns and controls the General Partner.

As of September 30, 2021, the Partnership owned a 27% controlling membership interest in the Operating Company and Diamondback owned, through its ownership of the Operating Company units, a 73% economic, non-voting interest in the Operating Company. As required by GAAP, the Partnership consolidates 100% of the assets and operations of the Operating Company in its financial statements and reflects a non-controlling interest attributable to Diamondback. In addition to the Operating Company, other consolidated subsidiaries of the Partnership include Tall City Towers LLC (“Tall Towers”), Rattler Ajax Processing LLC and Rattler OMOG LLC.

As of September 30, 2021, the Partnership also owns indirect interests in OMOG JV LLC (“OMOG”), EPIC Crude Holdings, LP (“EPIC”), EPIC Crude Holdings GP, LLC, Wink to Webster Pipeline LLC (“Wink to Webster”) and Gray Oak Pipeline, LLC (“Gray Oak”), which are accounted for as equity method investments as discussed further in Note 7— Equity Method Investments.

Basis of Presentation

The accompanying condensed consolidated financial statements and related notes thereto were prepared in accordance with GAAP. All significant intercompany balances and transactions have been eliminated upon consolidation. The Partnership reports its operations in one reportable segment. Effective in the first quarter of fiscal 2021, the Partnership determined the former real estate operations segment no longer met the criteria to be an operating segment due to a change in focus and the relative immateriality of the activity.

These condensed consolidated financial statements have been prepared by the Partnership without audit, pursuant to the rules and regulations of the SEC. They reflect all adjustments that are, in the opinion of management, necessary for a fair statement of the results for interim periods, on a basis consistent with the annual audited financial statements. All such adjustments are of a normal recurring nature. Certain information, accounting policies and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted pursuant to SEC rules and regulations, although the Partnership believes the disclosures are adequate to make the information presented not misleading. This Quarterly Report on Form 10–Q should be read in conjunction with the Partnership’s most recent Annual Report on Form 10-K for the fiscal year ended December 31, 2020, which contains a summary of the Partnership’s significant accounting policies and other disclosures.

Reclassifications

Certain prior period amounts have been reclassified to conform to the current period financial statement presentation. These reclassifications had no effect on the previously reported total assets, total liabilities, unitholders’ equity, results of operations or cash flows.

2.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Use of Estimates

Certain amounts included in or affecting the Partnership’s financial statements and related notes must be estimated by management, requiring certain assumptions to be made with respect to values or conditions that cannot be known with certainty at the time the financial statements are prepared. These estimates and assumptions affect the amounts the Partnership reports for assets and liabilities and the Partnership’s disclosure of contingent assets and liabilities as of the date of the financial statements.

7

Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

Making accurate estimates and assumptions is particularly difficult in the oil and natural gas industry given the challenges resulting from volatility in oil and natural gas prices. For instance, in 2020, the effects of COVID-19, and actions by OPEC members and other exporting nations on the supply and demand in global oil and natural gas markets, resulted in significant negative pricing pressure in the first half of 2020, followed by a recovery in pricing and an increase in demand in the second half of 2020 and into 2021. However, the COVID-19 Delta variant emerged in March 2021 and became highly transmissible in July 2021, which contributed to additional pricing volatility during the third quarter of 2021. Many companies in the oil and natural gas industry, including Diamondback, changed their business plans in response to changing market conditions. Such circumstances generally increase the uncertainty in the Partnership’s accounting estimates, particularly those involving financial forecasts.

The Partnership evaluates these estimates on an ongoing basis, using historical experience, consultation with experts and other methods it considers reasonable in each particular circumstance. Nevertheless, actual results may differ significantly from the Partnership’s estimates. Any effects on the Partnership’s business, financial position or results of operations resulting from revisions to these estimates are recorded in the period in which the facts that give rise to the revision become known. Significant items subject to such estimates and assumptions include, but are not limited to, (i) revenue accruals, (ii) the fair value of long-lived assets, (iii) asset retirement obligations and (iv) income taxes.

Accrued Liabilities and Accounts Payable

Accrued liabilities consist of the following as of the dates indicated:

	September 30, 2021		December 31, 2020
	(In thousands)
Direct operating expenses accrued	$	15,043	$	18,160
Capital expenditures accrued	6,868		5,328
Interest expense accrued	5,859		12,969
Sourced water purchases accrued	5,704		3,597
Accounts Payable	5,752		139
Other	1,899		2,454
Accounts payable and accrued liabilities	$	41,125	$	42,647

Accumulated Other Comprehensive Income

The following table provides changes in the components of accumulated other comprehensive income, net of related income tax effects (in thousands):

Balance as of December 31, 2020	$	(525)
Other comprehensive income (loss)	535
Balance as of September 30, 2021	$	10

Recent Accounting Pronouncements

Recently Adopted Pronouncements

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes.” This update is intended to simplify the accounting for income taxes by removing certain exceptions and by clarifying and amending existing guidance. This update is effective for public business entities beginning after December 15, 2020, with early adoption permitted. The Partnership adopted this update effective January 1, 2021. The adoption of this update did not have a material impact on its financial position, results of operations or liquidity.

The Partnership considers the applicability and impact of all ASUs. ASUs not discussed above were assessed and determined to be either not applicable or clarifications of ASUs previously disclosed.

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Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

3.    REVENUE FROM CONTRACTS WITH CUSTOMERS

The Partnership generates revenues by charging fees on a per unit basis for gathering crude oil and natural gas, delivering and storing sourced water, and collecting, recycling and disposing of produced water.

Surface revenue, rental and real estate income and amortization of out of market leases are outside the scope of ASC Topic 606, “Revenue from Contracts with Customers.”

Disaggregation of Revenue

In the following table, revenue from contracts with customers is disaggregated by type of service and fee:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Type of Service:
Produced water gathering and disposal	$	64,943	$	67,800	$	199,876	$	217,646
Sourced water gathering	16,832		12,653		49,514		48,308
Crude oil gathering	5,933		7,531		19,521		22,617
Natural gas gathering	5,697		5,076		17,021		14,506
Real estate contracts (non ASC 606 revenues)	3,072		3,464		10,266		10,705
Surface revenue (non ASC 606 revenues)	93		15		311		887
Total revenues	$	96,570	$	96,539	$	296,509	$	314,669

4.    DIVESTITURES

On April 30, 2021, each of the Partnership and its joint venture partner, Amarillo Midstream, LLC, sold its 50% interest in Amarillo Rattler, LLC (“Amarillo Rattler”) to EnLink Midstream Operating, LP for aggregate total gross potential consideration of $75.0 million, consisting of $50.0 million at closing, $10.0 million upon the first anniversary of closing and up to $15.0 million in contingent earn-out payments over a three-year span based upon Diamondback's development activity. The earn-out payments are contingent on connected wells drilled in Diamondback’s leasehold acreage in the specified earn-out area during each year between 2023 and 2025. Net of transaction expenses and working capital adjustments, the Partnership received $23.5 million at closing, with an incremental $5.0 million due in April 2022, which resulted in a gain on sale of equity method investments of $23.0 million in the consolidated statement of operations for the nine months ended September 30, 2021.The Partnership’s share of the contingent earn-out payments, which cannot exceed $7.5 million in total over the three-year span, will be recorded if and when the contingent payments become realizable.

On June 28, 2021, the Partnership closed on the sale of one of its real estate properties located in Midland, Texas for proceeds of $9.1 million, including closing adjustments. The sale resulted in a loss on disposal of assets of $1.6 million, in the consolidated statement of operations for the nine-months ended September 30, 2021.

See Note 16—Subsequent Events for further discussion of acquisitions and divestitures in the fourth quarter of 2021.

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Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

5.    REAL ESTATE ASSETS

The following schedules present the cost and related accumulated depreciation or amortization (as applicable) of the Partnership’s real estate assets and intangible lease assets:

		As of
	Estimated Useful Lives	September 30, 2021		December 31, 2020
	(Years)	(In thousands)
Buildings	20-30	$	94,760	$	102,918
Tenant improvements	15	4,506		4,506
Land	N/A	947		2,437
Land improvements	15	484		484
Total real estate assets		100,697		110,345
Less: accumulated depreciation		(15,358)		(13,658)
Total investment in real estate, net		$	85,339	$	96,687

		As of
	Weighted Average Useful Lives	September 30, 2021		December 31, 2020
	(Months)	(In thousands)
In-place lease intangibles	45	$	11,580	$	11,405
Less: accumulated amortization		(9,416)		(8,980)
In-place lease intangibles, net		2,164		2,425
Above-market lease intangibles	45	3,623		3,623
Less: accumulated amortization		(2,016)		(1,786)
Above-market lease intangibles, net		1,607		1,837
Total intangible lease assets, net		$	3,771	$	4,262

Depreciation and amortization expense for real estate assets was $1.0 million and $1.7 million for the three months ended September 30, 2021 and 2020, respectively, and $3.3 million and $5.2 million for the nine months ended September 30, 2021 and 2020, respectively.

The following table presents the Partnership’s estimated amortization expense related to lease intangibles for the periods indicated (in thousands):

Remainder of
2021		2022		2023		2024		2025		Thereafter
$	483	$	623	$	763	$	874	$	816	$	212

See Note 4—Divestitures for discussion of the Partnership’s significant real estate divestiture.

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Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

6.    PROPERTY, PLANT AND EQUIPMENT

The following table sets forth the Partnership’s property, plant and equipment:

		As of
	Estimated Useful Lives	September 30, 2021		December 31, 2020
	(Years)	(In thousands)
Produced water disposal systems	10-30	$	671,577	$	654,545
Crude oil gathering systems(1)	30	135,613		133,998
Natural gas gathering and compression systems(1)	10-30	6,115		112,072
Sourced water gathering systems(1)	30	108,727		112,162
Auto and trucks	3	374		—
Computer software	3	244		—
Total property, plant and equipment		922,650		1,012,777
Less: accumulated depreciation, amortization and accretion		(111,995)		(100,728)
Land	N/A	85,826		85,826
Total property, plant and equipment, net		$	896,481	$	997,875

(1)Included in gathering systems are $13.6 million and $27.5 million of assets at September 30, 2021 and December 31, 2020, respectively, that are not subject to depreciation, amortization and accretion as the systems were under construction and had not yet been put into service.

Depreciation expense related to property, plant and equipment was $10.1 million and $8.9 million for the three months ended September 30, 2021 and 2020, respectively, and $33.7 million and $29.4 million for the nine months ended September 30, 2021 and 2020, respectively.

Capitalized internal costs and capitalized interest related to property, plant and equipment were immaterial for the three and nine months ended September 30, 2021 and 2020.

The Partnership evaluates its long-lived assets for potential impairment whenever events or circumstances indicate it is more likely than not that the carrying amount of the asset, or set of assets, is greater than the fair value. An impairment involves comparing the estimated future undiscounted cash flows of an asset with the carrying amount. If the carrying amount of the asset exceeds the estimated future undiscounted cash flows, then an impairment charge is recorded for the difference between the estimated fair value of the asset and its carrying value. No such impairment charges were recorded during the three months ended September 30, 2021, or the three and nine months ended September 30, 2020. Abandonment charges of $3.4 million related to projects which had begun, but were later terminated, were recorded in depreciation, amortization and accretion on the consolidated statement of operations during the nine months ended September 30, 2021. It is possible that circumstances requiring additional impairment testing will occur in future interim periods, which could result in potentially material impairment charges being recorded.

Assets held for sale

At September 30, 2021, the Partnership classified certain gas gathering assets with a carrying value of $83.3 million as held for sale in the consolidated balance sheet. The net realizable value of these assets approximates the carrying value based on the expected sales price negotiated with a third party purchaser as discussed further in Note 16—Subsequent Events.

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Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

7.    EQUITY METHOD INVESTMENTS

The following table presents the carrying values of the Partnership’s equity method investments as of the dates indicated:

	Ownership Interest		September 30, 2021		December 31, 2020
			(In thousands)
EPIC Crude Holdings, LP	10	%	$	111,785	$	120,863
Gray Oak Pipeline, LLC	10	%	121,411		130,353
Wink to Webster Pipeline LLC (1)	4	%	86,286		82,631
OMOG JV LLC	60	%	189,418		193,726
Amarillo Rattler, LLC (2)	—	%	—		5,354
Remuda Midstream Holdings LLC (3)	—	%	274		—
Total			$	509,174	$	532,927

(1)The Wink to Webster joint venture is developing a crude oil pipeline (the “Wink to Webster pipeline”). The Wink to Webster pipeline’s main segment began interim service operation in the fourth quarter of 2020, and the joint venture is expected to begin full commercial operations in the first quarter of 2022.

(2)The ownership interest in Amarillo Rattler was 50% at December 31, 2020. See Note 4—Divestitures for discussion regarding the sale of this equity method investment during the second quarter of 2021.

(3)Includes $0.3 million of direct transaction costs incurred in the third quarter of 2021 for the acquisition of the WTG Joint Venture in the fourth quarter of 2021 as defined and discussed further in Note 16—Subsequent Events.

Currently, the Partnership receives distributions from Gray Oak and OMOG, which are classified either within the operating or investing sections of the consolidated statements of cash flows by determining the nature of each distribution. The following table presents total distributions received from the Partnership’s equity method investments for the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Gray Oak Pipeline, LLC	$	7,847	$	5,720	$	19,140	$	14,771
OMOG JV LLC	6,382		3,900		13,251		12,719
Total	$	14,229	$	9,620	$	32,391	$	27,490

The following table summarizes the income (loss) of equity method investees reflected in the condensed consolidated statement of operations for the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
EPIC Crude Holdings, LP	$	(2,530)	$	(1,904)	$	(10,638)	$	(4,703)
Gray Oak Pipeline, LLC	4,368		3,832		10,198		5,585
Wink to Webster Pipeline LLC	(550)		(127)		(1,641)		73
OMOG JV LLC	3,537		1,499		8,943		(10,681)
Amarillo Rattler, LLC	—		69		(388)		(184)
Total	$	4,825	$	3,369	$	6,474	$	(9,910)

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Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

The Partnership reviews its equity method investments to determine if a loss in value which is other than temporary has occurred. If such a loss has occurred, the Partnership recognizes an impairment provision. During the three and nine months ended September 30, 2021, the Partnership’s income (loss) from equity method investments includes a proportional charge of $0.6 million and $3.5 million, respectively, representing impairment recorded by the investee associated with inventory write-downs and abandoned projects. During the three and nine months ended September 30, 2020, the Partnership’s income (loss) from equity method investments includes a proportional charge of $15.8 million representing goodwill impairment recorded by an investee. No other impairments were recorded for the Partnership’s equity method investments for the three and nine months ended September 30, 2021 or 2020. The entities in which the Partnership is invested all serve customers in the oil and natural gas industry, which experienced economic challenges due to the COVID-19 pandemic and other macroeconomic factors during 2020. If similar economic challenges occur in future interim periods, it could result in circumstances requiring the Partnership to record potentially material impairment charges on its equity method investments.

8.    DEBT

Long-term debt consisted of the following as of the dates indicated:

	September 30, 2021		December 31, 2020
	(In thousands)
5.625% Senior Notes due 2025	$	500,000	$	500,000
Operating Company revolving credit facility	—		79,000
Unamortized debt issuance costs	(7,544)		(9,053)
Total long-term debt	$	492,456	$	569,947

The Operating Company’s Revolving Credit Facility

The Operating Company’s credit agreement (the “Credit Agreement”) provides for a revolving credit facility in the maximum amount of $600.0 million, which is expandable to $1.0 billion upon the Partnership’s election, subject to obtaining additional lender commitments and satisfaction of customary conditions. Loan principal may be optionally repaid from time to time without premium or penalty (other than customary LIBOR breakage), and is required to be paid at the maturity date of May 28, 2024. As of September 30, 2021, the Operating Company had no outstanding borrowings and $600.0 million available for future borrowings under the Credit Agreement. During the three and nine months ended September 30, 2021, the weighted average interest rate on borrowings under the Credit Agreement was 1.34% and 1.38%, respectively. During the three and nine months ended September 30, 2020, the weighted average interest rate on borrowings under the Credit Agreement was 1.46% and 2.18%, respectively.

As of September 30, 2021, the Operating Company was in compliance with all financial maintenance covenants under the Credit Agreement.

2025 Senior Notes

On July 14, 2020, the Partnership completed a notes offering (the “Notes Offering”) of $500.0 million in aggregate principal amount of its 5.625% Senior Notes due 2025 (the “Notes”). Interest on the Notes is payable on January 15 and July 15 of each year, beginning on January 15, 2021. The Notes mature on July 15, 2025. The Partnership received net proceeds of approximately $489.5 million from the Notes Offering. The Partnership loaned the gross proceeds of $500.0 million to the Operating Company, which used such proceeds to pay down borrowings under the Credit Agreement.

9.    UNIT-BASED COMPENSATION

On May 22, 2019, the board of directors of the General Partner adopted the Rattler Midstream LP Long Term Incentive Plan (“LTIP”) for employees, consultants and directors of the General Partner and any of its affiliates, including Diamondback, who perform services for the Partnership. The LTIP provides for the grant of unit options, unit appreciation rights, restricted units, unit awards, phantom units, distribution equivalent rights, cash awards, performance awards, other unit-based awards and substitute awards. As of September 30, 2021, a total of 14,535,791 common units had been reserved for issuance pursuant to the LTIP. Common units that are cancelled, forfeited or withheld to satisfy exercise prices or tax withholding obligations will be available for delivery pursuant to other awards. The LTIP is administered by the board of directors of the General Partner or a committee thereof.

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Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

Phantom Units

Under the LTIP, the board of directors of the General Partner is authorized to issue phantom units to eligible employees and non-employee directors. The Partnership estimates the fair value of phantom units based on the closing price of the Partnership’s common units on the grant date of the award, and expenses this value over the applicable vesting period. Upon vesting, the phantom units entitle the recipient to one common unit of the Partnership for each phantom unit. The recipients are also entitled to distribution equivalent rights, which represent the right to receive a cash payment equal to the value of the distributions paid on one phantom unit between the grant date and the vesting date.

The following table presents the phantom unit activity under the LTIP for the nine months ended September 30, 2021:

	Phantom Units	Weighted Average Grant-Date Fair Value
Unvested at December 31, 2020	2,089,668	$	17.07
Granted	238,399	$	10.99
Vested	(469,221)	$	18.37
Forfeited	(32,100)	$	6.72
Unvested at September 30, 2021	1,826,746	$	16.12

The aggregate fair value of phantom units that vested during the nine months ended September 30, 2021 was $8.6 million. As of September 30, 2021, the unrecognized compensation cost related to unvested phantom units was $25.4 million, and is expected to be recognized over a weighted-average period of 2.54 years. For the three and nine months ended September 30, 2021, the Partnership incurred $2.5 million and $7.3 million, respectively, of unit–based compensation expense. For the three and nine months ended September 30, 2020, the Partnership incurred $2.2 million and $6.6 million, respectively, of unit–based compensation expense.

10.    UNITHOLDERS’ EQUITY AND DISTRIBUTIONS

The Partnership has general partner and limited partner units. At September 30, 2021, the Partnership had a total of 39,960,128 common units issued and outstanding and 107,815,152 Class B units issued and outstanding, of which no common units and 107,815,152 Class B units, representing approximately 73% of the Partnership’s total units outstanding, were beneficially owned by Diamondback. At September 30, 2021, Diamondback also beneficially owned 107,815,152 Operating Company units, representing an overall 73% economic, non-voting interest in the Operating Company. The Operating Company units and the Partnership’s Class B units beneficially owned by Diamondback are exchangeable from time to time for the Partnership’s common units (that is, one Operating Company unit and one Partnership Class B unit, together, will be exchangeable for one Partnership common unit).

Common Unit Repurchase Program

On October 29, 2020, the board of directors of the General Partner approved a common unit repurchase program to acquire up to $100 million of the Partnership’s outstanding common units. The common unit repurchase program was authorized to extend through December 31, 2021, but in October 2021, the board of directors of the General Partner increased the repurchase program authorization to $150.0 million and extended the program indefinitely. The Partnership intends to purchase common units under the repurchase program opportunistically with cash on hand, free cash flow from operations and proceeds from potential liquidity events such as the sale of assets. The repurchase program may be suspended from time to time, modified, extended or discontinued by the board of directors of the General Partner at any time. Purchases under the repurchase program may be made from time to time in open market or privately negotiated transactions in compliance with Rule 10b-18 under the Securities Exchange Act of 1934, as amended, and will be subject to market conditions, applicable legal requirements, contractual obligations and other factors. Any common units purchased as part of this program will be retired During the three and nine months ended September 30, 2021, the Partnership repurchased approximately $12.3 million and $28.6 million, respectively, of common units under the repurchase program. As of September 30, 2021, $56.6 million remained available for use to repurchase common units under the Partnership’s common unit repurchase program.

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Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

Changes in Ownership of Consolidated Subsidiaries

Non-controlling interest in the accompanying condensed consolidated financial statements represents Diamondback’s ownership in the net assets of the Operating Company. Diamondback’s relative ownership interest in the Operating Company can change due to the Partnership’s public offerings, issuance of units for acquisitions, issuance of unit-based compensation, repurchases of common units and distribution equivalent rights paid on the Partnership’s units. These changes in ownership percentage and the disproportionate allocation of net income to Diamondback discussed below result in adjustments to non-controlling interest and common unitholder equity, tax effected.

The following table summarizes changes in the ownership interest in consolidated subsidiaries during the period:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Net income (loss) attributable to the Partnership	$	8,485	$	9,218	$	26,945	$	25,071
Change in ownership of consolidated subsidiaries	1,160		—		3,813		(329,034)
Change from net income (loss) attributable to the Partnership's unitholders and transfers to non-controlling interest	$	9,645	$	9,218	$	30,758	$	(303,963)

In the second quarter of 2020, the Partnership recorded adjustments to non-controlling interest of $419.6 million, common unitholder equity of $(329.0) million, and deferred tax assets of $90.6 million to reflect the ownership structure that was effective at June 30, 2020. The adjustment had no impact on earnings for the three and nine months ended September 30, 2020.

Cash Distributions on Common Units

The board of directors of the General Partner sets and administers the cash distribution policies for the Partnership and the Operating Company. Cash distributions paid by the Operating Company to Diamondback and the Partnership as the holders of the Operating Company’s common units are determined by the board of directors of the General Partner on a quarterly basis. The partnership agreement does not require the Partnership to pay minimum distributions to its common unitholders on a quarterly or other basis, and the Partnership does not employ structures intended to consistently maintain or increase distributions over time. On October 27, 2021, the board of directors of the General Partner approved a cash distribution for the third quarter of 2021 of $0.25 per Operating Company unit and per common unit. Distributions due to common unitholders are payable on November 22, 2021, to common unitholders of record at the close of business on November 15, 2021. The board of directors of the General Partner may change the distribution policies at any time and from time to time.

The following table presents information regarding cash distributions approved by the board of directors of the General Partner and paid during the three and nine months ended September 30, 2021:

			Distributions
			(in thousands)
Period	Amount per Unit		Operating Company Distributions to Diamondback		Common Unitholders		Declaration Date	Unitholder Record Date	Payment Date
Q4 2020	$	0.20	$	21,563	$	8,263	February 17, 2021	March 8, 2021	March 15, 2021
Q1 2021	$	0.20	$	21,563	$	8,183	April 28, 2021	May 14, 2021	May 21, 2021
Q2 2021	$	0.25	$	26,954	$	10,154	August 2, 2021	August 16, 2021	August 23, 2021

11.    EARNINGS PER COMMON UNIT

Earnings per common unit on the condensed consolidated statements of operations is based on the net income of the Partnership for the three and nine months ended September 30, 2021 and 2020, which is the amount of net income that is attributable to the Partnership’s common units. The Partnership’s net income is allocated wholly to the common units, as the General Partner does not have an economic interest.

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Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

Basic and diluted earnings per common unit is calculated using the two-class method. The two-class method is an earnings allocation proportional to the respective ownership among holders of common units and participating securities. Basic earnings per common unit is calculated by dividing net income by the weighted-average number of common units outstanding during the period. Diluted earnings per common unit also considers the dilutive effect of unvested common units granted under the LTIP, calculated using the treasury stock method.

A reconciliation of the components of basic and diluted earnings per common unit is presented in the table below:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands, except per unit amounts)
Net income (loss) attributable to Rattler Midstream LP	$	8,485	$	9,218	$	26,945	$	25,071
Less: net (income) loss allocated to participating securities(1)	(458)		(524)		(1,332)		(1,820)
Net income (loss) attributable to common unitholders	$	8,027	$	8,694	$	25,613	$	23,251
Weighted average common units outstanding:
Basic weighted average common units outstanding	40,542		43,996		41,101		43,837
Effect of dilutive securities:
Potential common units issuable(2)	—		—		—		—
Diluted weighted average common units outstanding	40,542		43,996		41,101		43,837
Net income per common unit, basic	$	0.20	$	0.20	$	0.62	$	0.53
Net income per common unit, diluted	$	0.20	$	0.20	$	0.62	$	0.53

(1)    Distribution equivalent rights granted to employees are considered participating securities.

(2)    For the three and nine months ended September 30, 2021 and 2020, no potential common units were included in the computation of diluted earnings per unit because their inclusion would have been anti-dilutive under the treasury stock method for the periods presented. However, such potential common units could dilute basic earnings per unit in future periods.

12.    RELATED PARTY TRANSACTIONS

Related party transactions include transactions with Diamondback. The Partnership has entered into certain agreements that govern these transactions, the most significant of which are commercial agreements for the provision of midstream services to Diamondback. The Partnership derives substantially all of its revenue from these commercial agreements, which consist of the following amounts for the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Produced water gathering and disposal	$	63,202	$	66,067	$	194,895	$	211,353
Sourced water gathering	16,833		11,948		48,105		46,845
Natural gas gathering	5,696		5,076		17,021		14,506
Crude oil gathering	1,835		2,745		6,022		7,730
Surface revenue	47		10		227		26
Total	$	87,613	$	85,846	$	266,270	$	280,460

16

Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

13.    INCOME TAXES

The following table provides the Partnership’s provision for (benefit from) income taxes and the effective income tax rate for the periods indicated:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020
	(In thousands, except for tax rate)
Provision for (benefit from) income taxes	$	2,551		$	2,851		$	7,761		$	7,754
Effective tax rate	6.1		%	6.8		%	6.1		%	6.8		%

The Partnership’s effective income tax rates for the three and nine months ended September 30, 2021 and 2020 differed from amounts computed by applying the United States federal statutory tax rate to pre-tax income for the period, primarily due to net income attributable to the non-controlling interest and to state taxes, net of federal benefit. For the three and nine months ended September 30, 2021 and 2020 the Partnership recorded immaterial discrete income tax expense primarily related to unit-based compensation.

The Partnership’s total net deferred tax assets consist primarily of the tax basis over the financial statement carrying value of its investment in the Operating Company and of net operating loss carryforwards. In the second quarter of 2020, the Partnership recorded an adjustment through unitholders’ equity to the carrying value of its investment in the Operating Company, resulting in a decrease in the Partnership’s deferred tax liability related to its investment in the Operating Company. As a result of management’s assessment each period, including consideration of all available positive and negative evidence, management continued to determine that it is more likely than not that the Partnership will realize its deferred tax assets as of September 30, 2021 and 2020.

14.    FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs.

The fair value hierarchy is based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value. The Partnership’s assessment of the significance of a particular input to the fair value measurements requires judgment and may affect the valuation of the assets and liabilities being measured and their placement within the fair value hierarchy. The Partnership uses appropriate valuation techniques based on available inputs to measure the fair values of its assets and liabilities.

Level 1 - Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets as of the reporting date.

Level 2 - Observable market-based inputs or unobservable inputs that are corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reporting date.

Level 3 - Unobservable inputs that are not corroborated by market data and may be used with internally developed methodologies that result in management’s best estimate of fair value.

Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement.

17

Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

Assets and Liabilities Not Recorded at Fair Value

The following table provides the fair value of financial instruments that are not recorded at fair value in the condensed consolidated balance sheets:

	September 30, 2021				December 31, 2020
	Carrying Value(1)		Fair Value		Carrying Value(1)		Fair Value
	(In thousands)
Debt:
5.625% Senior Notes due 2025	$	492,456	$	522,330	$	490,947	$	528,125
Operating Company revolving credit facility	$	—	$	—	$	79,000	$	79,000

(1) The carrying value includes associated deferred loan costs and any remaining discount or premium, if any.

The fair value of the Operating Company’s revolving credit facility approximates its carrying value based on borrowing rates available to the Partnership for bank loans with similar terms and maturities and is classified as Level 2 in the fair value hierarchy. The fair value of the Notes was determined using the quoted market price at the respective period ends, and is considered a Level 1 classification in the fair value hierarchy.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Certain assets and liabilities are measured at fair value on a nonrecurring basis in certain circumstances. These assets and liabilities can include inventory, midstream assets and other long-lived assets that are written down to fair value when they are impaired or held for sale. Refer to Note 6—Property, Plant and Equipment for additional discussion of nonrecurring fair value adjustments.

Fair Value of Financial Assets

The Partnership has other financial instruments consisting of cash, accounts receivable, other current assets, accounts payable, accrued liabilities and various other current liabilities. The carrying value of these instruments approximates fair value because of the short-term nature of the instruments.

15.    COMMITMENTS AND CONTINGENCIES

The Partnership may be a party to various routine legal proceedings, disputes and claims from time to time arising in the ordinary course of its business, including those that arise from interpretation of federal and state laws and regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters. The Partnership’s management believes there are currently no such matters that, if decided adversely, will have a material adverse effect on the Partnership’s financial condition, results of operations or cash flows.

Commitments

As of September 30, 2021, the Partnership’s anticipated future capital commitments for its equity method investments include $6.0 million for the remainder of 2021 and $22.7 million in aggregate.

16.    SUBSEQUENT EVENTS

Cash Distribution

On October 27, 2021, the board of directors of the General Partner approved a cash distribution for the third quarter of 2021 of $0.25 per common unit, payable on November 22, 2021, to unitholders of record at the close of business on November 15, 2021.

18

Rattler Midstream LP

Condensed Notes to Consolidated Financial Statements - Continued

(Unaudited)

Acquisitions and Divestitures

WTG Joint Venture Acquisition

On October 5, 2021, the Partnership and a private affiliate of an investment fund formed Remuda Midstream Holdings LLC (the “WTG joint venture”). The Operating Company invested approximately $104.0 million in cash to acquire a 25% interest in the WTG joint venture, which then completed an acquisition of a majority interest in WTG Midstream LLC (“WTG Midstream”) from West Texas Gas, Inc. and its affiliates. WTG Midstream’s assets primarily consist of an interconnected gas gathering system and six major gas processing plants servicing the Midland Basin with 925 MMcf/d of total processing capacity with additional gas gathering and processing expansions planned.

Drop Down Transaction

On October 19, 2021, the Partnership entered into a definitive purchase and sale agreement with Diamondback and certain of its subsidiaries (the “Seller”) for the Operating Company’s acquisition from the Seller of certain water midstream assets (the “Drop Down assets”) for $160.0 million in cash in a drop down transaction (the “Drop Down”). The Partnership and the Seller have also mutually agreed to amend their commercial agreements covering produced water gathering and disposal and sourced water gathering services to add certain Diamondback leasehold acreage to the Partnership’s dedication. The Drop Down assets have a carrying value of $160.0 million and include nine active saltwater disposal injection wells with 330 MBbl/d of capacity, seven produced water recycling and storage facilities, 20 fresh water pits and approximately 4,000 acres of fee surface. Also included are 55 miles of produced water gathering pipeline and 18 miles of sourced water gathering pipeline. The Partnership intends to fund the transaction with cash on hand and borrowings under its revolving credit facility. The Drop Down, which was approved by the Conflicts Committee of the board of directors of the General Partner, will be accounted for as a transaction between entities under common control and is expected to close in the fourth quarter of 2021, subject to customary closing conditions.

Pecos County Gas Gathering Divestiture

On November 1, 2021, the Partnership completed the sale of its gas gathering assets to Brazos Delaware Gas, LLC, an affiliate of Brazos Midstream, for aggregate total gross potential consideration of $93.0 million, consisting of (i) $83.0 million due at closing, subject to customary closing adjustments, (ii) a $5.0 million contingent payment due in 2023 if the aggregate actual deliveries of gas volumes into the gas gathering system by and/or on behalf of Diamondback and its affiliates exceed certain specified thresholds during 2022, and (iii) a $5.0 million contingent payment due in 2024 if the aggregate actual deliveries of gas volumes into the gas gathering system by and/or on behalf of Diamondback and its affiliates exceed certain specified thresholds during 2022 and 2023. The contingent payments will be recorded if and when they become realizable.

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

The following discussion and analysis should be read in conjunction with our unaudited condensed consolidated financial statements and notes thereto presented in this report as well as our audited financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020. The following discussion contains “forward-looking statements” that reflect our future plans, estimates, beliefs and expected performance. Actual results and the timing of events may differ materially from those contained in these forward-looking statements due to a number of factors. See “Cautionary Statement Regarding Forward-Looking Statements.”

Overview

We are a Delaware limited partnership formed by Diamondback in July 2018 to own, operate, develop and acquire midstream infrastructure assets in the Midland and Delaware Basins of the Permian Basin, one of the most prolific oil producing areas in the world. We have elected to be treated as a corporation for U.S. federal income tax purposes.

We provide crude oil, natural gas and water-related midstream services (including water sourcing and transportation and produced water gathering and disposal) to Diamondback under long-term, fixed-fee contracts. In addition to our midstream infrastructure assets, we own equity interests in three long-haul crude oil pipelines, which run from the Permian to the Texas Gulf Coast. In addition, we own equity interests in third-party operated gathering systems and processing facilities supported by dedications from Diamondback. We are critical to Diamondback’s development plans because we provide a long-term midstream solution to its increasing crude oil, natural gas and water-related services needs through our robust infield gathering systems and produced water disposal capabilities.

As of September 30, 2021, our general partner held a 100% general partner interest in us and Diamondback held no common units and beneficially owned all of our 107,815,152 outstanding Class B units, representing approximately 73% of our total outstanding units. Diamondback also owns and controls our general partner.

As of September 30, 2021, we own a 27% controlling membership interest in the Operating Company and Diamondback owns, through its ownership of the Operating Company units, a 73% economic, non-voting interest in the Operating Company. However, as required by GAAP, we consolidate 100% of the assets and operations of the Operating Company in our financial statements and reflect a non-controlling interest.

Recent Developments

COVID-19 and Commodity Prices

In early March 2020, oil prices dropped sharply and continued to decline briefly reaching negative levels as a result of multiple factors affecting the supply and demand in global oil and natural gas markets, including (i) actions taken by OPEC members and other exporting nations impacting commodity price and production levels, and (ii) a significant decrease in demand due to the COVID-19 pandemic. However, certain restrictions on conducting business that were implemented in response to the COVID-19 pandemic have since been lifted as improved treatments and vaccinations for COVID-19 have been rolled-out globally since late 2020. As a result, oil and natural gas prices have improved in response to the expected increase in demand for production. However, the COVID-19 Delta variant emerged in March 2021 and became highly transmissible in July 2021, which contributed to additional pricing volatility during the third quarter of 2021.

We derive substantially all of our revenue from our commercial agreements with Diamondback, which do not contain minimum volume commitments. In response to the decrease in oil prices in early 2020 discussed above, Diamondback reduced its drilling and development plan on the acreage dedicated to us, which directly and adversely impacted Diamondback’s demand for our midstream services. Diamondback resumed completion activity to stem production declines and respond to rising commodity prices in the third and fourth quarters of 2020, but has kept production relatively flat during the first nine months of 2021, using excess cash flows for debt repayment and to return capital to its stockholders rather than expanding its drilling program. Diamondback also indicated that it intends to continue exercising capital discipline and maintaining its fourth quarter 2021 oil production flat in 2022. As a result, we adjusted our operations to this new level of completion and production activity in the second half of 2020 and into 2021. We cannot predict the extent to which Diamondback’s business would be impacted if conditions in the energy industry were to deteriorate again, nor can we estimate the impact such conditions would have on Diamondback’s ability to execute its drilling and development plan on the dedicated acreage or to perform under our commercial agreements.

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During 2021, we expect to reduce operated capital expenditures significantly to a level of less than half of 2020 amounts. Combined with our equity method joint venture build cycle nearing its end and changing from a net outflow of capital contributions to a net inflow of cash distributions, we believe that this stabilized volume outlook will present a meaningful free cash flow generation even in this volatile commodity price environment.

Acquisitions

WTG Joint Venture Acquisition

On October 5, 2021, we and a private affiliate of an investment fund formed the WTG joint venture. The Operating Company invested approximately $104.0 million in cash to acquire a 25% interest in the WTG joint venture, which then completed an acquisition of a majority interest in WTG Midstream from West Texas Gas, Inc. and its affiliates. WTG Midstream’s assets primarily consist of an interconnected gas gathering system and six major gas processing plants servicing the Midland Basin with 925 MMcf/d of total processing capacity with additional gas gathering and processing expansions planned.

Drop Down Transaction

On October 19, 2021, we entered into a definitive purchase and sale agreement with Diamondback and certain of its subsidiaries to acquire certain water midstream assets for $160.0 million in cash in a drop down transaction. We intend to fund the transaction with cash on hand and borrowings under our revolving credit facility. The Drop Down will be accounted for as a transaction between entities under common control and is expected to close in the fourth quarter of 2021, subject customary closing conditions.

The Drop Down assets include nine active saltwater disposal injection wells with 330 MBbl/d of capacity, seven produced water recycling and storage facilities, 20 fresh water pits and approximately 4,000 acres of fee surface. Also included are 55 miles of produced water gathering pipeline and 18 miles of sourced water gathering pipeline.

The WTG transaction and the pending Drop Down will increase our exposure to Diamondback's development in the Northern Midland Basin, where approximately 75% of its drilling capital is currently being allocated, while retaining financial flexibility to continue to return capital to our unitholders. See Note 16—Subsequent Events included in the condensed notes to the consolidated financial statements included elsewhere in this report for further discussion of our acquisitions in the fourth quarter of 2021.

Divestitures

Amarillo Rattler Divestiture

On April 30, 2021, we and our joint venture partner, Amarillo Midstream, LLC, each sold our respective 50% interests in Amarillo Rattler to EnLink Midstream Operating, LP. Net of transaction expenses and working capital adjustments, we received $23.5 million at closing. An incremental $5.0 million is payable to us in April 2022, and we could receive up to $7.5 million in total contingent earn-out payments from 2023 to 2025.

Real Estate Divestiture

On June 28, 2021, we closed on the sale of one of our real estate properties located in Midland, Texas for proceeds of $9.1 million, including closing adjustments, which resulted in a loss on disposal of $1.6 million which is included in gain (loss) on disposal of property, plant and equipment on the consolidated statement of operations.

Pecos County Gas Gathering Divestiture

On November 1, 2021, we completed the sale of our gas gathering assets to Brazos Delaware Gas, LLC, an affiliate of Brazos Midstream, for aggregate total gross potential consideration of $93.0 million, consisting of (i) $83.0 million due at closing, subject to customary closing adjustments, (ii) a $5.0 million contingent payment due in 2023 if the aggregate actual deliveries of gas volumes into the gas gathering system by and/or on behalf of Diamondback and its affiliates exceed certain specified thresholds during 2022, and (iii) a $5.0 million contingent payment due in 2024 if the aggregate actual deliveries of gas volumes into the gas gathering system by and/or on behalf of Diamondback and its affiliates exceed certain specified thresholds during 2022 and 2023. The contingent payments will be recorded if and when they become realizable.

21

See Note 4—Divestitures and Note 16—Subsequent Events included in the condensed notes to the consolidated financial statements included elsewhere in this report for further discussion of our divestitures.

Operational Update

Highlights

For the three months ended September 30, 2021, as compared with the three months ended September 30, 2020:

•average crude oil gathering volumes were 72,665 Bbl/d, a decrease of 20% year over year;

•average natural gas gathering volumes were 134,602 MMBtu/d, an increase of 12% year over year;

•average produced water gathering and disposal volumes were 747,009 Bbl/d, a decrease of 2% year over year; and

•average sourced water gathering volumes were 256,288 Bbl/d, an increase of 26% year over year.

Pipeline Infrastructure Assets

The following tables provide information regarding our gathering, compression and transportation system as of September 30, 2021 and utilization for the quarter ended September 30, 2021:

(Miles)(1)	Delaware Basin	Midland Basin	Permian Total
Crude oil	112	46	158
Natural gas	160	—	160
Produced water	270	251	521
Sourced water	27	74	101
Total	569	371	940

(Capacity/capability)(1)	Delaware Basin	Midland Basin	Permian Total	Utilization
Crude oil gathering (Bbl/d)	240,000	65,000	305,000	24	%
Natural gas compression (Mcf/d)	151,000	—	151,000	75	%
Natural gas gathering (Mcf/d)	180,000	—	180,000	63	%
Produced water gathering and disposal (Bbl/d)	1,330,000	1,784,000	3,114,000	24	%
Sourced water gathering (Bbl/d)	120,000	455,000	575,000	45	%

(1)Does not include any assets of our equity method investment joint ventures.

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Results of Operations

The following table sets forth selected historical operating data for the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands, except operating data)
Revenues:
Revenues—related party	$	87,613	$	85,846	$	266,270	$	280,460
Revenues—third party	5,885		7,229		19,973		23,504
Other income—related party	2,080		2,431		7,162		5,419
Other income—third party	992		1,033		3,104		5,286
Total revenues	96,570		96,539		296,509		314,669
Costs and expenses:
Direct operating expenses	22,335		31,173		81,145		101,425
Cost of goods sold (exclusive of depreciation and amortization)	10,951		6,663		30,060		27,368
Real estate operating expenses	558		494		1,619		1,812
Depreciation, amortization and accretion	11,443		10,990		37,928		35,596
Impairment and abandonments	—		—		3,371		—
General and administrative expenses	5,338		3,140		14,928		11,829
(Gain) loss on disposal of assets	1,144		(16)		6,155		2,765
Total costs and expenses	51,769		52,444		175,206		180,795
Income (loss) from operations	44,801		44,095		121,303		133,874
Other income (expense):
Interest income (expense), net	(8,172)		(5,817)		(23,717)		(10,364)
Gain (loss) on sale of equity method investments	31		—		23,020		—
Income (loss) from equity method investments	4,825		3,369		6,474		(9,910)
Total other income (expense), net	(3,316)		(2,448)		5,777		(20,274)
Net income (loss) before income taxes	41,485		41,647		127,080		113,600
Provision for (benefit from) income taxes	2,551		2,851		7,761		7,754
Net income (loss)	38,934		38,796		119,319		105,846
Less: Net income (loss) attributable to non-controlling interest	30,449		29,578		92,374		80,775
Net income (loss) attributable to Rattler Midstream LP	$	8,485	$	9,218	$	26,945	$	25,071
Operating Data:
Throughput(1)
Crude oil gathering (Bbl/d)	72,665		91,090		80,584		93,205
Natural gas gathering (MMBtu/d)	134,602		119,951		135,538		115,089
Produced water gathering and disposal (Bbl/d)	747,009		763,475		771,453		825,254
Sourced water gathering (Bbl/d)	256,288		203,785		255,188		242,710

(1)    Does not include any volumes from our equity method investment joint ventures.

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Sources of Our Revenues

We currently generate a substantial portion of our revenues under fee-based commercial agreements with Diamondback, each with an initial term ending in 2034, utilizing our infrastructure assets or our planned infrastructure assets to provide an array of essential services critical to Diamondback’s upstream operations on certain dedicated acreage in the Delaware and Midland Basins.

Commodity price fluctuations indirectly influence our activities and results of operations over the long-term, since they can affect production rates and investments by Diamondback and third-parties in the development of new crude oil and natural gas reserves. Commodity prices are volatile and influenced by numerous factors beyond our or Diamondback’s control, including the domestic and global supply of and demand for crude oil and natural gas. Furthermore, our ability to execute our development strategy in the Permian will depend on crude oil and natural gas production in that area, which is also affected by the supply of and demand for crude oil and natural gas.

Comparison of the Three Months Ended September 30, 2021 and 2020 and Nine Months Ended September 30, 2021 and 2020

Revenues

There were no significant changes in total revenues for the three months ended September 30, 2021 compared to the same period in 2020; however, decreases in revenues from produced water volumes of $2.9 million and crude oil volumes gathered of $1.6 million, were offset by increases of $4.2 million in revenues from sourced water volumes gathered and $0.6 million in natural gas volumes gathered. Total revenues decreased by $18.2 million to $296.5 million for the nine months ended September 30, 2021 from $314.7 million for the nine months ended September 30, 2020, due to decreases in revenues from produced water volumes of $17.8 million and revenues from crude oil volumes gathered of $3.1 million, which were partially offset by increases of $1.2 million in revenues from sourced water volumes gathered and $2.5 million in revenues from natural gas volumes.

The decreases in revenues from produced water volumes and crude oil volumes in each period were due to a reduction in volumes transported by Diamondback through the systems on our dedicated acreage. The increases in revenues from sourced water volumes and natural gas volumes gathered in each period were due to an increase in Diamondback’s drilling and completion activity.

Direct Operating Expenses

Direct operating expenses totaled $22.3 million and $81.1 million for the three and nine months ended September 30, 2021, respectively, compared to $31.2 million and $101.4 million for the three and nine months ended September 30, 2020, respectively. The decreases in the 2021 periods compared to the 2020 periods are largely due to a focus on cost cutting efforts along with a reduction in expenses related to declining produced water and oil volumes in 2021.

Cost of Goods Sold

Cost of goods sold (exclusive of depreciation and amortization) increased by $4.3 million to $11.0 million for the three months ended September 30, 2021 from $6.7 million for the three months ended September 30, 2020. The increase primarily relates to higher sourced water and gas gathering volumes due to Diamondback’s increased level of drilling and completion activity in the third quarter of 2021 compared to the same period in 2020.

Cost of goods sold (exclusive of depreciation and amortization) increased by $2.7 million to $30.1 million for the nine months ended September 30, 2021 from $27.4 million for the nine months ended September 30, 2020. The increase primarily relates to higher sourced water and gas gathering volumes transported in the second and third quarters of 2021, which was partially offset by a reduction in the volumes of produced water gathered and disposed and crude oil volumes gathered due to lower levels of drilling and completion activity in the first quarter of 2021.

Depreciation, Amortization and Accretion

There were no significant changes in depreciation, amortization and accretion for the three months ended September 30, 2021 compared to the same period in 2020. Depreciation, amortization and accretion was $37.9 million and $35.6 million for the nine months ended September 30, 2021 and 2020, respectively. The increase of $2.3 million was largely due to further

24

development of existing gathering and compression, transportation and disposals systems, which increased our depreciable asset base, partially offset by abandoned and sold assets during the fourth quarter of 2020 and first quarter of 2021.

Interest Expense, Net

Net interest expense was $8.2 million and $23.7 million for the three and nine months ended September 30, 2021, respectively, compared to $5.8 million and $10.4 million for the three and nine months ended September 30, 2020, respectively. The increases in the 2021 periods compared to the 2020 periods primarily relate to interest accrued on the Notes which were issued in July 2020 and bear interest at a rate of 5.625% per annum.

Gain (loss) on Sale of Equity Method Investments

The gain on sale of equity method investments for the three and nine months ended September 30, 2021 related to the sale of our interest in Amarillo Rattler in the second quarter of 2021. See Note 4—Divestitures included in the condensed notes to the consolidated financial statements included elsewhere in this report for discussion of the sale.

Income (loss) from Equity Method Investments

There were no significant changes in income from equity method investments for the three months ended September 30, 2021 compared to the same period in 2020.

Income from equity method investments was $6.5 million for the nine months ended September 30, 2021 compared to a loss of $9.9 million for the nine months ended September 30, 2020. The loss in the 2020 period primarily related to a proportional charge of $15.8 million in goodwill impairment recorded by an investee. See Note 7—Equity Method Investments included in the condensed notes to the consolidated financial statements included elsewhere in this report for additional discussion.

Non-GAAP Financial Measures

Adjusted EBITDA

Adjusted EBITDA is a supplemental non-GAAP financial measure used by management and external users of our financial statements, such as industry analysts, investors, lenders and rating agencies. We believe Adjusted EBITDA is useful because it allows us to more effectively evaluate our operating performance and compare the results of our operations period to period without regard to our financing methods or capital structure.

We define Adjusted EBITDA as net income (loss) attributable to Rattler Midstream LP plus net income (loss) attributable to non-controlling interest before interest expense (net of amount capitalized), depreciation, amortization and accretion on assets and liabilities of the Operating Company, our proportional depreciation and interest expense related to equity method investments, our proportional impairments and abandonments related to equity method investments, non-cash unit-based compensation expense, impairment and abandonments, (gain) loss on disposal of assets, (gain) loss from sale of equity method investment, provision for income taxes and other. The GAAP measure most directly comparable to Adjusted EBITDA is net income (loss). However, Adjusted EBITDA is not a measure of net income (loss) as determined by GAAP. We exclude the items listed above from net income (loss) in arriving at Adjusted EBITDA because these amounts can vary substantially from company to company within our industry depending upon accounting methods and book values of assets, capital structures and the method by which the assets were acquired. Certain items excluded from Adjusted EBITDA are significant components in understanding and assessing a company’s financial performance, such as a company’s cost of capital and tax structure, as well as historic costs of depreciable assets.

Adjusted EBITDA should not be considered an alternative to net income (loss) or any other measure of financial performance or liquidity presented in accordance with GAAP. Our computation of Adjusted EBITDA excludes some, but not all, items that affect net income (loss), and these measures may vary from those of other companies. As a result, Adjusted EBITDA as presented below may not be comparable to similarly titled measures of other companies.

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The following table presents a reconciliation of net income to Adjusted EBITDA for each of the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Reconciliation of Net Income (Loss) to Adjusted EBITDA:
Net income (loss) attributable to Rattler Midstream LP	$	8,485	$	9,218	$	26,945	$	25,071
Net income (loss) attributable to non-controlling interest	30,449		29,578		92,374		80,775
Net income (loss)	38,934		38,796		119,319		105,846
Interest expense, net of amount capitalized	8,172		5,817		23,717		10,364
Depreciation, amortization and accretion	11,443		10,990		37,928		35,596
Depreciation and interest expense related to equity method investments	9,799		9,330		30,360		20,340
Impairments and abandonments related to equity method investments	551		676		3,484		16,515
Non-cash unit-based compensation expense	2,491		2,216		7,308		6,555
Impairment and abandonments	—		—		3,371		—
(Gain) loss on disposal of assets	1,144		(16)		6,155		2,765
Gain (loss) on sale of equity method investments	(31)		—		(23,020)		—
Provision for income taxes	2,551		2,851		7,761		7,754
Other	(28)		687		6		471
Adjusted EBITDA	75,026		71,347		216,389		206,206
Less: Adjusted EBITDA attributable to non-controlling interest	54,614		50,670		156,833		146,582
Adjusted EBITDA attributable to Rattler Midstream LP	$	20,412	$	20,677	$	59,556	$	59,624

Liquidity and Capital Resources

Overview

Our primary sources of liquidity have been cash generated from operations, borrowings under the Credit Agreement and the issuance of the Notes. We believe that cash generated from these sources as well as proceeds received from the sale of assets in the fourth quarter will be sufficient to meet our short-term working capital requirements and long-term capital expenditure requirements and to make quarterly cash distributions. We do not have any commitment from Diamondback, our general partner or any of their respective affiliates to fund our cash flow deficits or provide other direct or indirect financial assistance to us. Should we require additional capital, the indirect effect of volatile commodity markets and/or adverse macroeconomic conditions may limit our access to, or increase our cost of, capital or make capital unavailable on terms acceptable to us or at all.

Cash Distributions on Common Units

On October 27, 2021, the board of directors of our general partner approved a cash distribution for the third quarter of 2021 of $0.25 per common unit, payable on November 22, 2021, to common unitholders of record at the close of business on November 15, 2021. The board of directors of our general partner may change the distribution policy at any time and from time to time. See Note 10—Unitholders’ Equity and Distributions included in the condensed notes to the consolidated financial statements included elsewhere in this report for additional discussion of our distribution policy.

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Cash Flows

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

	Nine Months Ended September 30,
	2021		2020
	(In thousands)
Cash Flow Data:
Net cash provided by (used in) operating activities	$	185,799	$	177,374
Net cash provided by (used in) investing activities	10,825		(187,208)
Net cash provided by (used in) financing activities	(207,471)		15,777
Net increase (decrease) in cash	$	(10,847)	$	5,943

Operating Activities

Net cash provided by operating activities increased by $8.4 million during the nine months ended September 30, 2021 compared to the nine months ended September 30, 2020, due primarily to distributions representing returns on investment from our equity method investments of $23.3 million and decreases in direct operating expenses of $20.3 million. These increases were partially offset by the $18.2 million decline in revenues, an increase in cash paid for interest of $22.8 million, and less significant increases in cost of goods sold and general and administrative costs. The remaining change stems largely from fluctuations in working capital due primarily to the timing of when collections are made on accounts receivable and payments are made on accounts payable and accrued liabilities. See —Results of Operations for further discussion of changes in revenue, operating expenses and interest expense and Note 7—Equity Method Investments included in the condensed notes to the consolidated financial statements included elsewhere in this report for further discussion of distributions.

Investing Activities

Net cash provided by investing activities was $10.8 million during the nine months ended September 30, 2021, and primarily consists of $23.5 million in proceeds from the sale of our Amarillo Rattler equity method investment, $9.2 million in proceeds from the sale of a real estate asset, and $9.1 million in distributions considered to be returns of investment received from certain of our equity method investments prior to placing constructed assets in service. These proceeds were partially offset by capital expenditures for property, plant and equipment of $24.1 million and contributions to our equity method investments of $7.1 million, which continue to decrease as discussed in —Recent Developments.

Net cash used in investing activities was $187.2 million during the nine months ended September 30, 2020, and primarily related to additions to property, plant and equipment and contributions to our equity method investments, which were partially offset by distributions considered to be returns of investment received from our Gray Oak and OMOG equity method investments.

Financing Activities

Net cash used in financing activities was $207.5 million during the nine months ended September 30, 2021, and primarily related to distributions of $96.7 million to our unitholders, net payments on the credit facility of $79.0 million as we continue to reduce our borrowings and $28.6 million in repurchases of common units under our repurchase program during the period.

Net cash provided by financing activities was $15.8 million during the nine months ended September 30, 2020, and primarily related to proceeds from the notes offering of $500.0 million, which were largely offset by net borrowings on the credit facility of $339.0 million, distributions to our unitholders of $132.0 million during the period and debt issuance costs incurred on the notes offering.

Common Unit Repurchase Program

On October 29, 2020, the board of directors of our general partner approved a common unit repurchase program to acquire up to $100 million of our outstanding common units. The common unit repurchase program was authorized to extend through December 31, 2021, but in October 2021, the repurchase program authorization was further increased to $150.0 million and the program was extended indefinitely. We intend to purchase common units under the repurchase program

27

opportunistically with cash on hand, free cash flow from operations and proceeds from potential liquidity events such as the sale of assets. The repurchase program may be suspended from time to time, modified, extended or discontinued by the board of directors of our general partner at any time. Purchases under the repurchase program may be made from time to time in open market or privately negotiated transactions in compliance with Rule 10b-18 under the Securities Exchange Act of 1934, as amended, and will be subject to market conditions, applicable legal requirements, contractual obligations and other factors. Any common units purchased as part of this program will be retired. During the nine months ended September 30, 2021, we repurchased approximately $28.6 million of common units under the repurchase program. As of September 30, 2021, $56.6 million remained available for use to repurchase common units under our program.

Capital Requirements and Sources of Liquidity

The midstream energy business is capital intensive, requiring the maintenance of existing gathering systems and other midstream assets and facilities and the acquisition or construction and development of new gathering systems and other midstream assets and facilities. However, with respect to capital expenditures incurred for acquisitions or capital improvements, we have some discretion and control. In times of reduced operational activity, we may choose to defer a portion of our budgeted capital expenditures until later periods to achieve the desired balance between sources and uses of liquidity and prioritize capital projects that we believe have the highest expected returns and potential to generate near-term cash flow. Subject to financing alternatives, we may also increase our capital expenditures significantly to take advantage of opportunities we consider to be attractive. We consistently monitor and may adjust our projected capital expenditures in response to factors both within and outside our control.

For the nine months ended September 30, 2021, our total capital expenditures were $24.1 million, which primarily consisted of $20.8 million related to produced water disposal assets, $2.2 million related to crude oil gathering assets, $1.3 million related to real estate assets and $0.2 million related to natural gas gathering assets. We estimate that our total capital expenditures related to midstream assets for 2021 will be between $30 million and $40 million, excluding our anticipated total capital commitments related to our equity method investments of approximately $10 million. We also estimate that distributions from our equity method investments will be between $40 million to $45 million. However, this range could decrease due to the continued impact, either directly or indirectly, of the COVID-19 pandemic or volatile crude oil prices on our business.

We own equity interests in the EPIC, Gray Oak, Wink to Webster and OMOG joint ventures. Each of these joint ventures is accounted for using the equity method. The following table sets forth our cumulative capital contributions and anticipated future capital commitment for each of our equity method investment interests:

	Ownership Interest		Acquisition Date	Cumulative Capital Contributions to Date		Anticipated Future Capital Commitment
				(In thousands)
EPIC Crude Holdings, LP	10	%	February 1, 2019	$	137,534	$	2,466
Gray Oak Pipeline, LLC	10	%	February 15, 2019	$	142,096	$	—
Wink to Webster Pipeline LLC	4	%	July 30, 2019	$	87,732	$	20,268
OMOG JV LLC	60	%	October 1, 2019	$	218,555	$	—

As of September 30, 2021, we anticipate making additional contributions of $6.0 million to our equity method investments during the remainder of 2021. Other than the purchase price of $104.0 million, we do not currently anticipate making additional capital contributions to our equity method investment, the WTG joint venture, which was acquired in October 2021. For further discussion regarding these investments see Note 7— Equity Method Investments and Note 16—Subsequent Events included in the condensed notes to the consolidated financial statements included elsewhere in this report.

Based upon current expectations for 2021, we believe that our cash flows from operations, cash on hand and borrowing under our revolving credit facility will be sufficient to fund our operations and anticipated future capital commitments through the 12-month period following the filing of this report and thereafter.

Indebtedness

At September 30, 2021, we have $500.0 million in principal amount of outstanding indebtedness, which consists of Notes and borrowings under the Operating Company’s revolving credit facility, if any, as discussed further below.

28

The Operating Company’s Revolving Credit Facility

The Operating Company’s credit agreement provides for a revolving credit facility in the maximum credit amount of $600.0 million, which is expandable to $1.0 billion upon our election, subject to obtaining additional lender commitments and satisfaction of customary conditions. As of September 30, 2021, there were no outstanding borrowings and $600.0 million available for future borrowings, under the Operating Company’s revolving credit facility. The weighted average interest rate on borrowings under the Credit Agreement was 1.34% and 1.38% for the three and nine months ended September 30, 2021, respectively. The credit agreement matures on May 28, 2024.

As of September 30, 2021, the Operating Company was in compliance with all financial covenants under its Credit Agreement.

Notes Offering

On July 14, 2020, we completed an offering of our 5.625% senior notes due 2025 in the aggregate principal amount of $500.0 million. We received net proceeds of approximately $489.5 million from the notes offering. We loaned the gross proceeds of $500.0 million of the notes offering to the Operating Company, which used the proceeds from the notes offering to repay then outstanding borrowings under its revolving credit facility. Interest on the notes is payable semi-annually, and the first interest payment was made on January 15, 2021.

For additional information regarding the outstanding debt, see Note 8—Debt included in the condensed notes to the consolidated financial statements included elsewhere in this report.

Contractual Obligations

Except as may be discussed in Note 8—Debt and Note 15—Commitments and Contingencies included in the condensed notes to the consolidated financial statements included elsewhere in this report, there were no material changes to our contractual obligations and other commitments, from those disclosed in our Annual Report on Form 10-K for the year ended December 31, 2020.

Critical Accounting Policies

There have been no changes in our critical accounting policies from those disclosed in our Annual Report on Form  10-K for the year ended December 31, 2020.

Off-Balance Sheet Arrangements

We currently have no significant off-balance sheet arrangements.

29

ITEM 3.    QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to market risk, including the effects of adverse changes in commodity prices and interest rates as described below. The primary objective of the following information is to provide quantitative and qualitative information about our potential exposure to market risks. The term “market risk” refers to the risk of loss arising from adverse changes in oil and natural gas prices and interest rates. The disclosures are not meant to be precise indicators of expected future losses, but rather indicators of reasonably possible losses.

Commodity Price Risk

We currently generate the majority of our revenues pursuant to fee-based agreements with Diamondback under which we are paid based on volumetric fees, rather than the underlying value of the commodity. Consequently, our existing operations and cash flows have little direct exposure to commodity price risk. However, Diamondback and our other customers are exposed to commodity price risk, and an extended reduction in commodity prices could reduce the production volumes available for our midstream services in the future below expected levels. Although we intend to maintain fee-based pricing terms on both new contracts and existing contracts for which prices have not yet been set, our efforts to negotiate such terms may not be successful, which could have a materially adverse effect on our business.

We may acquire or develop additional midstream assets in a manner that increases our exposure to commodity price risk. Future exposure to the volatility of crude oil, natural gas and natural gas liquids prices could have a material adverse effect on our business, financial condition, results of operations, cash flows and ability to make cash distributions to our unitholders.

Credit Risk

We are subject to counterparty credit risk related to our midstream commercial contracts, lease agreements and joint venture receivables. We derive substantially all of our revenue from our commercial agreements with Diamondback. As a result, we are directly affected by changes to Diamondback’s business related to operational and business risks or otherwise. We cannot predict the extent to which Diamondback’s business would be impacted if conditions in the energy industry were to deteriorate, nor can we estimate the impact such conditions would have on Diamondback’s ability to execute its drilling and development program or to perform under our agreements. While we monitor the creditworthiness of purchasers, lessees and joint venture partners with which we conduct business, we are unable to predict sudden changes in solvency of these counterparties and may be exposed to associated risks. Nonperformance by a counterparty could result in significant financial losses.

Interest Rate Risk

We are subject to market risk exposure related to changes in interest rates on our indebtedness under the Operating Company’s credit agreement. The terms of the Credit Agreement provide for interest at a rate elected by the Operating Company that is based on the prime rate or LIBOR, in each case plus margins ranging from 0.250% to 1.250% for prime-based loans and 1.250% to 2.250% per annum for LIBOR loans, in each case depending on the Consolidated Total Leverage Ratio (as defined in the Credit Agreement). The Operating Company is obligated to pay a quarterly commitment fee ranging from 0.250% to 0.375% per annum on the unused portion of the commitment, which fee is also dependent on the Consolidated Total Leverage Ratio.

As of September 30, 2021, we had no outstanding borrowings and $600.0 million available for future borrowings under the Credit Agreement. During the three and nine months ended September 30, 2021, the weighted average interest rate on borrowings under the Credit Agreement was 1.34% and 1.38%, respectively.

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ITEM 4.          CONTROLS AND PROCEDURES

Evaluation of Disclosure Control and Procedures. Under the direction of the Chief Executive Officer and Chief Financial Officer of our general partner, we have established disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, that are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. The disclosure controls and procedures are also intended to ensure that such information is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer of our general partner, as appropriate to allow timely decisions regarding required disclosures. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures must reflect resource constraints and that management is required to apply judgment in evaluating the benefits of possible controls and procedures relative to their costs.

As of September 30, 2021, an evaluation was performed under the supervision and with the participation of management, including the Chief Executive Officer and Chief Financial Officer of our general partner, of the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15(b) under the Exchange Act. Based upon the evaluation, the Chief Executive Officer and Chief Financial Officer of our general partner have concluded that as of September 30, 2021, our disclosure controls and procedures are effective.

Changes in Internal Control over Financial Reporting. In July 2021, we implemented an enterprise resource planning system covering various financial and accounting processes. As a result of this implementation, certain internal controls over financial reporting have been automated, modified or implemented to address the new environment associated with the implementation of this system. We believe we have maintained appropriate internal control over financial reporting during the implementation and believe this new system will strengthen our internal control system. However, there are inherent risks in implementing any new system, and we will continue to evaluate these control changes as part of our assessment of internal control over financial reporting throughout 2021. There have been no other changes in our internal control over financial reporting that occurred during the quarter ended September 30, 2021 that have materially affected, or are reasonably likely to materially affect, internal controls over financial reporting.

PART II. OTHER INFORMATION

ITEM 1.     LEGAL PROCEEDINGS

Due to the nature of our business, we may be involved in various routine legal proceedings, disputes and claims from time to time arising in the ordinary course of our business activities. In the opinion of our management, there are currently no such matters that, if decided adversely, will have a material adverse effect on our financial condition, results of operations or cash flows. See Note 15—Commitments and Contingencies included in the condensed notes to the consolidated financial statements included elsewhere in this report.

ITEM 1A.     RISK FACTORS

Our business faces many risks. Any of the risks discussed in this report and our other SEC filings could have a material impact on our business, financial position or results of operations. Additional risks and uncertainties not presently known to us or that we currently believe to be immaterial may also materially impair our business operations, financial condition or future results.

As of the date of this filing, we continue to be subject 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, 2020, filed with the SEC on February 25, 2021. There have been no material changes in our risk factors from those described in our Annual Report on Form 10-K for the year ended December 31, 2020.

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

Unregistered Sales of Equity Securities

None.

Issuer Repurchases of Equity Securities

Our common unit repurchase activity for the three months ended September 30, 2021 was as follows:

Period	Total Number of Units Purchased(1)	Average Price Paid Per Unit (2)		Total Number of Units Purchased as Part of Publicly Announced Plan	Approximate Dollar Value of Units that May Yet Be Purchased Under the Plan (3)
	($ in thousands, except per unit amounts)
July 1, 2021 - July 31, 2021	332,465	$	10.33	272,465	$	65,511
August 1, 2021 - August 31, 2021	544,359	$	10.58	544,359	$	59,750
September 1, 2021 - September 30, 2021	271,917	$	11.46	331,917	$	56,634
Total	1,148,741	$	10.72	1,148,741

(1)Includes common units repurchased from employees in order to satisfy tax withholding requirements. Such units are retired immediately upon repurchase.

(2)The average price paid per common unit includes commissions paid to repurchase common units.

(3)In October 2020, the board of directors of our general partner approved an initial common unit repurchase program to acquire up to $100 million of our outstanding common units through December 31, 2021. In October 2021, the repurchase program authorization was increased to $150.0 million and the program was extended indefinitely. This repurchase program may be suspended from time to time, modified, extended or discontinued by the board of directors of our general partner at any time.

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ITEM 6.     EXHIBITS

Exhibit Number	Description
2.1	Purchase and Sale Agreement, dated October 19, 2021, by and among Diamondback E&P LLC, QEP Energy Company and Guidon Anchor LLC, as seller, and Rattler Midstream Operating LLC, as purchaser (incorporated by reference to Exhibit 2.1 of the Registrant’s Current Report on Form 8-K (File 001-38919) filed on October 21, 2021).
3.1	Certificate of Limited Partnership of Rattler Midstream LP (incorporated by reference to Exhibit 3.1 of the Registrant’s Registration Statement on Form S-1 (File No. 333-226645) filed on August 7, 2018).
3.2	Certificate of Amendment to the Certificate of Limited Partnership of Rattler Midstream LP (incorporated by reference to Exhibit 3.2 of Amendment No. 2 to the Registrant’s Registration Statement on Form S-1 (File No. 333-226645) filed on January 22, 2019).
3.3	First Amended and Restated Agreement of Limited Partnership of Rattler Midstream LP, dated May 28, 2019 (incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K (File 001-38919) filed on May 29, 2019).
3.4	Certificate of Formation of Rattler Midstream Operating LLC (formerly White Fang Energy LLC) (incorporated by reference to Exhibit 3.3 of the Registrant’s Registration Statement on Form S-1 (File No. 333-226645) filed on August 7, 2018).
3.5	Certificate of Amendment to the Certificate of Formation of Rattler Midstream Operating LLC (formerly White Fang Energy LLC) (incorporated by reference to Exhibit 3.4 of the Registrant’s Registration Statement on Form S-1 (File No. 333-226645) filed on August 7, 2018).
3.6	Certificate of Amendment to the Certificate of Formation of Rattler Midstream Operating LLC (formerly Rattler Midstream LLC) (incorporated by reference to Exhibit 3.6 of Amendment No. 2 to the Registrant’s Registration Statement on Form S-1 (File No. 333-226645) filed on January 22, 2019).
3.7	Second Amended and Restated Limited Liability Company Agreement of Rattler Midstream Operating LLC (incorporated by reference to Exhibit 3.2 of the Registrant’s Current Report on Form 8-K (File 001-38919) filed on May 29, 2019).
3.8	Certificate of Formation of Rattler Midstream GP LLC (incorporated by reference to Exhibit 3.6 of the Registrant’s Registration Statement on Form S-1 (File No. 333-226645) filed on August 7, 2018).
3.9	First Amended and Restated Limited Liability Company Agreement of Rattler Midstream GP LLC (incorporated by reference to Exhibit 3.3 of the Registrant’s Current Report on Form 8-K (File 001-38919) filed on May 29, 2019).
4.1	Indenture, dated as of July 14, 2020, among Rattler Midstream LP, as issuer, Rattler Midstream Operating LLC, Tall City Towers LLC, Rattler OMOG LLC and Rattler Ajax Processing LLC, as guarantors, and Wells Fargo Bank, National Association, as trustee (including the form of Rattler Midstream LP’s 5.625% Senior Notes due 2025) (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K (File 001-38919) filed on July 14, 2020).
31.1*	Certification of Chief Executive Officer of the Registrant pursuant to Rule 13a-14(a) promulgated under the Securities Exchange Act of 1934, as amended.
31.2*	Certification of Chief Financial Officer of the Registrant pursuant to Rule 13a-14(a) promulgated under the Securities Exchange Act of 1934, as amended.
32.1**	Certification of Chief Executive Officer and Chief Financial Officer of the Registrant pursuant to Rule 13a-14(b) promulgated under the Securities Exchange Act of 1934, as amended, and Section 1350 of Chapter 63 of Title 18 of the United States Code.
101	The following financial information from the Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2021, formatted in Inline XBRL: (i) Condensed Consolidated Balance Sheets, (ii) Condensed Consolidated Statements of Operations, (iii) Condensed Consolidated Statements of Comprehensive Income, (iv) Condensed Consolidated Statement of Changes in Unitholders’ Equity, (v) Condensed Consolidated Statements of Cash Flows and (vi) Condensed Notes to Consolidated Financial Statements.
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).

*	Filed herewith.
**	The certifications attached as Exhibit 32.1 accompany this Quarterly Report on Form 10-Q pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, and shall not be deemed “filed” by the Registrant for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.

33

SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		RATTLER MIDSTREAM LP
		By:	RATTLER MIDSTREAM GP LLC,
			its general partner
Date:	November 4, 2021	By:	/s/ Travis D. Stice
			Travis D. Stice
			Chief Executive Officer
			(Principal Executive Officer)
Date:	November 4, 2021	By:	/s/ Teresa L. Dick
			Teresa L. Dick
			Chief Financial Officer
			(Principal Financial Officer)

34

EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, Travis D. Stice, certify that:

1.    I have reviewed this Quarterly Report on Form 10-Q of Rattler Midstream LP (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 and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

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

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

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

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

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

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

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

Date:	November 4, 2021	/s/ Travis D. Stice
		Travis D. Stice
		Chief Executive Officer
		Rattler Midstream GP LLC
		(as general partner of Rattler Midstream LP)

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, Teresa L. Dick, certify that:

1.    I have reviewed this Quarterly Report on Form 10-Q of Rattler Midstream LP (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 and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

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

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

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

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

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

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

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

Date:	November 4, 2021	/s/ Teresa L. Dick
		Teresa L. Dick
		Chief Financial Officer
		Rattler Midstream GP LLC
		(as general partner of Rattler Midstream LP)

EX-32.1

EXHIBIT 32.1

CERTIFICATION OF PERIOD REPORT

In connection with the Quarterly Report on Form 10-Q of Rattler Midstream LP (the “Partnership”), as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Travis D. Stice, Chief Executive Officer of Rattler Midstream GP LLC, the general partner of the Partnership, and Teresa L. Dick, Chief Financial Officer of Rattler Midstream GP LLC, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to their knowledge:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 78o(d)); and

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

Date:	November 4, 2021	/s/ Travis D. Stice
		Travis D. Stice
		Chief Executive Officer
		Rattler Midstream GP LLC
		(as general partner of Rattler Midstream LP)
Date:	November 4, 2021	/s/ Teresa L. Dick
		Teresa L. Dick
		Chief Financial Officer
		Rattler Midstream GP LLC
		(as general partner of Rattler Midstream LP)

XML

Cover - shares	9 Months Ended
	Sep. 30, 2021	Oct. 29, 2021	Dec. 31, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-38919
Entity Registrant Name	Rattler Midstream LP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	83-1404608
Entity Address, Address Line One	500 West Texas
Entity Address, Address Line Two	Suite 1200
Entity Address, City or Town	Midland,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	79701
City Area Code	432
Local Phone Number	221-7400
Title of 12(b) Security	Common Units
Trading Symbol	RTLR
Security Exchange Name	NASDAQ
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 Common Stock, Shares Outstanding		39,905,768
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001748773
Current Fiscal Year End Date	--12-31
Class B Units
Entity Information [Line Items]
Units outstanding (in shares)	107,815,152	107,815,152	107,815,152

XML

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash	$ 13,080	$ 23,927
Accounts receivable—related party	47,094	57,447
Accounts receivable—third party, net	11,042	5,658
Sourced water inventory	9,668	10,108
Assets held for sale	83,285	0
Other current assets	658	1,127
Total current assets	164,827	98,267
Property, plant and equipment:
Land	85,826	85,826
Property, plant and equipment	922,650	1,012,777
Accumulated depreciation, amortization and accretion	(111,995)	(100,728)
Total property, plant and equipment, net	896,481	997,875
Right of use assets	59	574
Equity method investments	509,174	532,927
Real estate assets, net	85,339	96,687
Intangible lease assets, net	3,771	4,262
Deferred tax asset	65,016	73,264
Other assets	3,924	4,732
Total assets	1,728,591	1,808,588
Current liabilities:
Accounts payable and accrued liabilities	41,125	42,647
Taxes payable	655	192
Short-term lease liability	59	574
Asset retirement obligations	79	35
Total current liabilities	41,918	43,448
Long-term debt	492,456	569,947
Asset retirement obligations	16,476	15,093
Total liabilities	550,850	628,488
Commitments and contingencies (Note 15)
Unitholders’ equity:
General partner—Diamondback	839	899
Common units—public (39,960,128 units issued and outstanding as of September 30, 2021 and 42,356,637 units issued and outstanding as of December 31, 2020)	364,985	385,189
Class B units—Diamondback (107,815,152 units issued and outstanding as of September 30, 2021 and as of December 31, 2020)	839	899
Accumulated other comprehensive income (loss)	10	(123)
Total Rattler Midstream LP unitholders’ equity	366,673	386,864
Non-controlling interest	811,068	793,638
Non-controlling interest in accumulated other comprehensive income (loss)	0	(402)
Total equity	1,177,741	1,180,100
Total liabilities and unitholders’ equity	$ 1,728,591	$ 1,808,588

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - shares	Oct. 29, 2021	Sep. 30, 2021	Dec. 31, 2020
Common Units
Common units issued (in shares)		39,960,128	42,356,637
Units outstanding (in shares)		39,960,128	42,356,637
Class B Units
Common units issued (in shares)		107,815,152	107,815,152
Units outstanding (in shares)	107,815,152	107,815,152	107,815,152

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Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Revenues	$ 96,570,000	$ 96,539,000	$ 296,509,000	$ 314,669,000
Costs and expenses:
Direct operating expenses	22,335,000	31,173,000	81,145,000	101,425,000
Cost of goods sold (exclusive of depreciation and amortization)	10,951,000	6,663,000	30,060,000	27,368,000
Real estate operating expenses	558,000	494,000	1,619,000	1,812,000
Depreciation, amortization and accretion	11,443,000	10,990,000	37,928,000	35,596,000
Impairment and abandonments	0	0	3,371,000	0
General and administrative expenses	5,338,000	3,140,000	14,928,000	11,829,000
(Gain) loss on disposal of assets	1,144,000	(16,000)	6,155,000	2,765,000
Total costs and expenses	51,769,000	52,444,000	175,206,000	180,795,000
Income (loss) from operations	44,801,000	44,095,000	121,303,000	133,874,000
Other income (expense):
Interest income (expense), net	(8,172,000)	(5,817,000)	(23,717,000)	(10,364,000)
Gain (loss) on sale of equity method investments	31,000	0	23,020,000	0
Income (loss) from equity method investments	4,825,000	3,369,000	6,474,000	(9,910,000)
Total other income (expense), net	(3,316,000)	(2,448,000)	5,777,000	(20,274,000)
Net income (loss) before income taxes	41,485,000	41,647,000	127,080,000	113,600,000
Provision for (benefit from) income taxes	2,551,000	2,851,000	7,761,000	7,754,000
Net income (loss)	38,934,000	38,796,000	119,319,000	105,846,000
Less: Net income (loss) attributable to non-controlling interest	30,449,000	29,578,000	92,374,000	80,775,000
Net income (loss) attributable to Rattler Midstream LP	$ 8,485,000	$ 9,218,000	$ 26,945,000	$ 25,071,000
Net income (loss) attributable to limited partners per common unit:
Basic (in dollars per share)	$ 0.20	$ 0.20	$ 0.62	$ 0.53
Diluted (in dollars per share)	$ 0.20	$ 0.20	$ 0.62	$ 0.53
Weighted average number of limited partner common units outstanding:
Basic (in shares)	40,542	43,996	41,101	43,837
Diluted (in shares)	40,542	43,996	41,101	43,837
Revenues—related party
Revenues:
Revenues	$ 87,613,000	$ 85,846,000	$ 266,270,000	$ 280,460,000
Revenues—third party
Revenues:
Revenues	5,885,000	7,229,000	19,973,000	23,504,000
Other income—related party
Revenues:
Revenues	2,080,000	2,431,000	7,162,000	5,419,000
Other income—third party
Revenues:
Revenues	$ 992,000	$ 1,033,000	$ 3,104,000	$ 5,286,000

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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 38,934	$ 38,796	$ 119,319	$ 105,846
Other comprehensive income (loss):
Change in accumulated other comprehensive income (loss) of equity method investees attributable to non-controlling interest	0	306	402	(70)
Change in accumulated other comprehensive income (loss) of equity method investees attributable to limited partner	0	97	133	(25)
Total other comprehensive income (loss)	0	403	535	(95)
Comprehensive income (loss)	$ 38,934	$ 39,199	$ 119,854	$ 105,751

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Condensed Consolidated Statements of Changes in Unitholders’ Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Limited Partners	General Partner	Common Units Limited Partners	Class B Units Limited Partners	Non-Controlling Interest	Accumulated Other Comprehensive Income	Non-Controlling Interest-Accumulated Other Comprehensive Income
Beginning balance (in shares) at Dec. 31, 2019				43,700	107,815
Beginning balance at Dec. 31, 2019	$ 1,115,840		$ 979	$ 737,777	$ 979	$ 376,928	$ (198)	$ (625)
Increase (Decrease) in Partners' Capital [Roll Forward]
Unit-based compensation	2,219			2,219
Other comprehensive income (loss)	(258)						(63)	(195)
Distribution equivalent rights payments	(652)			(652)
Distributions	(43,979)		(20)	(12,673)	$ (20)	(31,266)
Net income (loss)	54,588			$ 13,031		41,557
Ending balance (in shares) at Mar. 31, 2020				43,700	107,815
Ending balance at Mar. 31, 2020	1,127,758		959	$ 739,702	$ 959	387,219	(261)	(820)
Beginning balance (in shares) at Dec. 31, 2019				43,700	107,815
Beginning balance at Dec. 31, 2019	1,115,840		979	$ 737,777	$ 979	376,928	(198)	(625)
Increase (Decrease) in Partners' Capital [Roll Forward]
Other comprehensive income (loss)	(95)
Change in ownership of consolidated subsidiaries		$ (329,034)
Net income (loss)	105,846
Ending balance (in shares) at Sep. 30, 2020				43,996	107,815
Ending balance at Sep. 30, 2020	1,183,550		919	$ 399,080	$ 919	783,550	(223)	(695)
Beginning balance (in shares) at Mar. 31, 2020				43,700	107,815
Beginning balance at Mar. 31, 2020	1,127,758		959	$ 739,702	$ 959	387,219	(261)	(820)
Increase (Decrease) in Partners' Capital [Roll Forward]
Unit-based compensation (in shares)				450
Unit-based compensation	2,120			$ 2,120
Other comprehensive income (loss)	(240)						(59)	(181)
Change in ownership of consolidated subsidiaries	90,613			$ (329,034)		419,647
Units repurchased for tax withholding (in shares)				(154)
Cash paid for tax withholding on vested common units	(1,365)			$ (1,365)
Distribution equivalent rights payments	(644)			(644)
Distributions	(43,980)		(20)	(12,673)	$ (20)	(31,267)
Net income (loss)	12,462			$ 2,822		9,640
Ending balance (in shares) at Jun. 30, 2020				43,996	107,815
Ending balance at Jun. 30, 2020	1,186,724		939	$ 400,928	$ 939	785,239	(320)	(1,001)
Increase (Decrease) in Partners' Capital [Roll Forward]
Unit-based compensation	2,216			2,216
Other comprehensive income (loss)	403						97	306
Change in ownership of consolidated subsidiaries		0
Distribution equivalent rights payments	(524)			(524)
Distributions	(44,065)		(20)	(12,758)	$ (20)	(31,267)
Net income (loss)	38,796			$ 9,218		29,578
Ending balance (in shares) at Sep. 30, 2020				43,996	107,815
Ending balance at Sep. 30, 2020	1,183,550		919	$ 399,080	$ 919	783,550	(223)	(695)
Beginning balance (in shares) at Dec. 31, 2020				42,357	107,815
Beginning balance at Dec. 31, 2020	1,180,100		899	$ 385,189	$ 899	793,638	(123)	(402)
Increase (Decrease) in Partners' Capital [Roll Forward]
Repurchased units as part of unit buyback (in shares)				(1,082)
Repurchased units as part of unit buyback	(11,114)			$ (11,114)
Unit-based compensation	2,332			$ 2,332
Issuance of common units (in shares)				3
Other comprehensive income (loss)	392						93	299
Change in ownership of consolidated subsidiaries	(196)			$ 712		(908)
Cash paid for tax withholding on vested common units	(21)			(21)
Distribution equivalent rights payments	(418)			(418)
Distributions	(29,866)		(20)	(8,263)	$ (20)	(21,563)
Net income (loss)	25,908			$ 6,015		19,893
Ending balance (in shares) at Mar. 31, 2021				41,278	107,815
Ending balance at Mar. 31, 2021	1,167,117		879	$ 374,432	$ 879	791,060	(30)	(103)
Beginning balance (in shares) at Dec. 31, 2020				42,357	107,815
Beginning balance at Dec. 31, 2020	1,180,100		899	$ 385,189	$ 899	793,638	(123)	(402)
Increase (Decrease) in Partners' Capital [Roll Forward]
Other comprehensive income (loss)	535
Ending balance (in shares) at Jun. 30, 2021				41,076	107,815
Ending balance at Jun. 30, 2021	1,186,554		859	$ 375,773	$ 859	809,053	10	0
Beginning balance (in shares) at Dec. 31, 2020				42,357	107,815
Beginning balance at Dec. 31, 2020	1,180,100		899	$ 385,189	$ 899	793,638	(123)	(402)
Increase (Decrease) in Partners' Capital [Roll Forward]
Other comprehensive income (loss)	535
Change in ownership of consolidated subsidiaries		3,813
Net income (loss)	119,319
Ending balance (in shares) at Sep. 30, 2021				39,960	107,815
Ending balance at Sep. 30, 2021	1,177,741		839	$ 364,985	$ 839	811,068	10	0
Beginning balance (in shares) at Mar. 31, 2021				41,278	107,815
Beginning balance at Mar. 31, 2021	1,167,117		879	$ 374,432	$ 879	791,060	(30)	(103)
Increase (Decrease) in Partners' Capital [Roll Forward]
Repurchased units as part of unit buyback (in shares)				(475)
Repurchased units as part of unit buyback	(5,198)			$ (5,198)
Unit-based compensation	2,485			$ 2,485
Issuance of common units (in shares)				273
Other comprehensive income (loss)	143						40	103
Change in ownership of consolidated subsidiaries	(535)			$ 1,941		(2,476)
Cash paid for tax withholding on vested common units	(1,693)			(1,693)
Distribution equivalent rights payments	(456)			(456)
Distributions	(29,786)		(20)	(8,183)	$ (20)	(21,563)
Net income (loss)	54,477			$ 12,445		42,032
Ending balance (in shares) at Jun. 30, 2021				41,076	107,815
Ending balance at Jun. 30, 2021	1,186,554		859	$ 375,773	$ 859	809,053	10	0
Increase (Decrease) in Partners' Capital [Roll Forward]
Repurchased units as part of unit buyback (in shares)				(1,148)
Repurchased units as part of unit buyback	(12,312)			$ (12,312)
Unit-based compensation (in shares)				0
Unit-based compensation	2,491			$ 2,491
Issuance of common units (in shares)				32
Other comprehensive income (loss)	0			$ 0			0	0
Change in ownership of consolidated subsidiaries	(320)	$ 1,160		1,160		(1,480)
Cash paid for tax withholding on vested common units	0			0
Distribution equivalent rights payments	(458)			(458)
Distributions	(37,148)		(20)	(10,154)	$ (20)	(26,954)
Net income (loss)	38,934			$ 8,485		30,449
Ending balance (in shares) at Sep. 30, 2021				39,960	107,815
Ending balance at Sep. 30, 2021	$ 1,177,741		$ 839	$ 364,985	$ 839	$ 811,068	$ 10	$ 0

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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 119,319,000	$ 105,846,000
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision for deferred income taxes	7,761,000	7,754,000
Depreciation, amortization and accretion	37,928,000	35,596,000
(Gain) loss on disposal of assets	6,155,000	2,765,000
Unit-based compensation expense	7,308,000	6,555,000
Impairment and abandonments	3,371,000	0
Gain (loss) on sale of equity method investments	(23,020,000)	0
(Income) loss from equity method investments	(6,474,000)	9,910,000
Distributions from equity method investments	23,284,000	0
Other	1,509,000	467,000
Changes in operating assets and liabilities:
Accounts receivable—related party	10,347,000	1,649,000
Accounts payable, accrued liabilities and taxes payable	(3,673,000)	117,000
Other	1,984,000	6,715,000
Net cash provided by (used in) operating activities	185,799,000	177,374,000
Cash flows from investing activities:
Additions to property, plant and equipment	(24,139,000)	(124,989,000)
Contributions to equity method investments	(7,069,000)	(89,751,000)
Distributions from equity method investments	9,107,000	27,490,000
Proceeds from the sale of equity method investments	23,485,000	0
Proceeds from the sale of real estate	9,191,000	0
Other	250,000	42,000
Net cash provided by (used in) investing activities	10,825,000	(187,208,000)
Cash flows from financing activities:
Proceeds from senior notes	0	500,000,000
Proceeds from borrowings from credit facility	44,000,000	179,000,000
Payments on credit facility	(123,000,000)	(518,000,000)
Debt issuance costs	0	(10,014,000)
Repurchased units as part of unit buyback	(28,624,000)	0
Distribution to public	(26,600,000)	(38,104,000)
Distribution to Diamondback	(70,140,000)	(93,860,000)
Other	(3,107,000)	(3,245,000)
Net cash provided by (used in) financing activities	(207,471,000)	15,777,000
Net increase (decrease) in cash	(10,847,000)	5,943,000
Cash at beginning of period	23,927,000	10,633,000
Cash at end of period	13,080,000	16,576,000
Supplemental disclosure of non-cash investing activity:
Accrued liabilities related to capital expenditures	$ 35,373,000	$ 13,689,000

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ORGANIZATION AND BASIS OF PRESENTATION

9 Months Ended

Sep. 30, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

ORGANIZATION AND BASIS OF PRESENTATION

ORGANIZATION AND BASIS OF PRESENTATION

Organization

The Partnership is a publicly traded Delaware limited partnership focused on owning, operating, developing and acquiring midstream infrastructure assets in the Midland and Delaware Basins of the Permian Basin.

As of September 30, 2021, the General Partner held a 100% general partner interest in the Partnership and Diamondback beneficially owned all of the Partnership’s 107,815,152 outstanding Class B units, representing approximately 73% of the Partnership’s total units outstanding. Diamondback owns and controls the General Partner.

As of September 30, 2021, the Partnership owned a 27% controlling membership interest in the Operating Company and Diamondback owned, through its ownership of the Operating Company units, a 73% economic, non-voting interest in the Operating Company. As required by GAAP, the Partnership consolidates 100% of the assets and operations of the Operating Company in its financial statements and reflects a non-controlling interest attributable to Diamondback. In addition to the Operating Company, other consolidated subsidiaries of the Partnership include Tall City Towers LLC (“Tall Towers”), Rattler Ajax Processing LLC and Rattler OMOG LLC.

As of September 30, 2021, the Partnership also owns indirect interests in OMOG JV LLC (“OMOG”), EPIC Crude Holdings, LP (“EPIC”), EPIC Crude Holdings GP, LLC, Wink to Webster Pipeline LLC (“Wink to Webster”) and Gray Oak Pipeline, LLC (“Gray Oak”), which are accounted for as equity method investments as discussed further in Note 7— Equity Method Investments.

Basis of Presentation

The accompanying condensed consolidated financial statements and related notes thereto were prepared in accordance with GAAP. All significant intercompany balances and transactions have been eliminated upon consolidation. The Partnership reports its operations in one reportable segment. Effective in the first quarter of fiscal 2021, the Partnership determined the former real estate operations segment no longer met the criteria to be an operating segment due to a change in focus and the relative immateriality of the activity.

These condensed consolidated financial statements have been prepared by the Partnership without audit, pursuant to the rules and regulations of the SEC. They reflect all adjustments that are, in the opinion of management, necessary for a fair statement of the results for interim periods, on a basis consistent with the annual audited financial statements. All such adjustments are of a normal recurring nature. Certain information, accounting policies and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted pursuant to SEC rules and regulations, although the Partnership believes the disclosures are adequate to make the information presented not misleading. This Quarterly Report on Form 10–Q should be read in conjunction with the Partnership’s most recent Annual Report on Form 10-K for the fiscal year ended December 31, 2020, which contains a summary of the Partnership’s significant accounting policies and other disclosures.

Reclassifications

Certain prior period amounts have been reclassified to conform to the current period financial statement presentation. These reclassifications had no effect on the previously reported total assets, total liabilities, unitholders’ equity, results of operations or cash flows.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Use of Estimates

Certain amounts included in or affecting the Partnership’s financial statements and related notes must be estimated by management, requiring certain assumptions to be made with respect to values or conditions that cannot be known with certainty at the time the financial statements are prepared. These estimates and assumptions affect the amounts the Partnership reports for assets and liabilities and the Partnership’s disclosure of contingent assets and liabilities as of the date of the financial statements.

Making accurate estimates and assumptions is particularly difficult in the oil and natural gas industry given the challenges resulting from volatility in oil and natural gas prices. For instance, in 2020, the effects of COVID-19, and actions by OPEC members and other exporting nations on the supply and demand in global oil and natural gas markets, resulted in significant negative pricing pressure in the first half of 2020, followed by a recovery in pricing and an increase in demand in the second half of 2020 and into 2021. However, the COVID-19 Delta variant emerged in March 2021 and became highly transmissible in July 2021, which contributed to additional pricing volatility during the third quarter of 2021. Many companies in the oil and natural gas industry, including Diamondback, changed their business plans in response to changing market conditions. Such circumstances generally increase the uncertainty in the Partnership’s accounting estimates, particularly those involving financial forecasts.

The Partnership evaluates these estimates on an ongoing basis, using historical experience, consultation with experts and other methods it considers reasonable in each particular circumstance. Nevertheless, actual results may differ significantly from the Partnership’s estimates. Any effects on the Partnership’s business, financial position or results of operations resulting from revisions to these estimates are recorded in the period in which the facts that give rise to the revision become known. Significant items subject to such estimates and assumptions include, but are not limited to, (i) revenue accruals, (ii) the fair value of long-lived assets, (iii) asset retirement obligations and (iv) income taxes.

Accrued Liabilities and Accounts Payable

Accrued liabilities consist of the following as of the dates indicated:

	September 30, 2021		December 31, 2020
	(In thousands)
Direct operating expenses accrued	$	15,043	$	18,160
Capital expenditures accrued	6,868		5,328
Interest expense accrued	5,859		12,969
Sourced water purchases accrued	5,704		3,597
Accounts Payable	5,752		139
Other	1,899		2,454
Accounts payable and accrued liabilities	$	41,125	$	42,647

Accumulated Other Comprehensive Income

The following table provides changes in the components of accumulated other comprehensive income, net of related income tax effects (in thousands):

Balance as of December 31, 2020	$	(525)
Other comprehensive income (loss)	535
Balance as of September 30, 2021	$	10

Recent Accounting Pronouncements

Recently Adopted Pronouncements

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes.” This update is intended to simplify the accounting for income taxes by removing certain exceptions and by clarifying and amending existing guidance. This update is effective for public business entities beginning after December 15, 2020, with early adoption permitted. The Partnership adopted this update effective January 1, 2021. The adoption of this update did not have a material impact on its financial position, results of operations or liquidity.

The Partnership considers the applicability and impact of all ASUs. ASUs not discussed above were assessed and determined to be either not applicable or clarifications of ASUs previously disclosed.

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REVENUE FROM CONTRACTS WITH CUSTOMERS

9 Months Ended

Sep. 30, 2021

Revenue Recognition and Deferred Revenue [Abstract]

REVENUE FROM CONTRACTS WITH CUSTOMERS

REVENUE FROM CONTRACTS WITH CUSTOMERS

The Partnership generates revenues by charging fees on a per unit basis for gathering crude oil and natural gas, delivering and storing sourced water, and collecting, recycling and disposing of produced water.

Surface revenue, rental and real estate income and amortization of out of market leases are outside the scope of ASC Topic 606, “Revenue from Contracts with Customers.”

Disaggregation of Revenue

In the following table, revenue from contracts with customers is disaggregated by type of service and fee:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Type of Service:
Produced water gathering and disposal	$	64,943	$	67,800	$	199,876	$	217,646
Sourced water gathering	16,832		12,653		49,514		48,308
Crude oil gathering	5,933		7,531		19,521		22,617
Natural gas gathering	5,697		5,076		17,021		14,506
Real estate contracts (non ASC 606 revenues)	3,072		3,464		10,266		10,705
Surface revenue (non ASC 606 revenues)	93		15		311		887
Total revenues	$	96,570	$	96,539	$	296,509	$	314,669

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DIVESTITURES

9 Months Ended

Sep. 30, 2021

Discontinued Operations and Disposal Groups [Abstract]

DIVESTITURES

DIVESTITURES

On April 30, 2021, each of the Partnership and its joint venture partner, Amarillo Midstream, LLC, sold its 50% interest in Amarillo Rattler, LLC (“Amarillo Rattler”) to EnLink Midstream Operating, LP for aggregate total gross potential consideration of $75.0 million, consisting of $50.0 million at closing, $10.0 million upon the first anniversary of closing and up to $15.0 million in contingent earn-out payments over a three-year span based upon Diamondback's development activity. The earn-out payments are contingent on connected wells drilled in Diamondback’s leasehold acreage in the specified earn-out area during each year between 2023 and 2025. Net of transaction expenses and working capital adjustments, the Partnership received $23.5 million at closing, with an incremental $5.0 million due in April 2022, which resulted in a gain on sale of equity method investments of $23.0 million in the consolidated statement of operations for the nine months ended September 30, 2021.The Partnership’s share of the contingent earn-out payments, which cannot exceed $7.5 million in total over the three-year span, will be recorded if and when the contingent payments become realizable.

On June 28, 2021, the Partnership closed on the sale of one of its real estate properties located in Midland, Texas for proceeds of $9.1 million, including closing adjustments. The sale resulted in a loss on disposal of assets of $1.6 million, in the consolidated statement of operations for the nine-months ended September 30, 2021.

See Note 16—Subsequent Events for further discussion of acquisitions and divestitures in the fourth quarter of 2021.

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REAL ESTATE ASSETS

9 Months Ended

Sep. 30, 2021

Real Estate [Abstract]

REAL ESTATE ASSETS

REAL ESTATE ASSETS

The following schedules present the cost and related accumulated depreciation or amortization (as applicable) of the Partnership’s real estate assets and intangible lease assets:

		As of
	Estimated Useful Lives	September 30, 2021		December 31, 2020
	(Years)	(In thousands)
Buildings	20-30	$	94,760	$	102,918
Tenant improvements	15	4,506		4,506
Land	N/A	947		2,437
Land improvements	15	484		484
Total real estate assets		100,697		110,345
Less: accumulated depreciation		(15,358)		(13,658)
Total investment in real estate, net		$	85,339	$	96,687

		As of
	Weighted Average Useful Lives	September 30, 2021		December 31, 2020
	(Months)	(In thousands)
In-place lease intangibles	45	$	11,580	$	11,405
Less: accumulated amortization		(9,416)		(8,980)
In-place lease intangibles, net		2,164		2,425
Above-market lease intangibles	45	3,623		3,623
Less: accumulated amortization		(2,016)		(1,786)
Above-market lease intangibles, net		1,607		1,837
Total intangible lease assets, net		$	3,771	$	4,262

Depreciation and amortization expense for real estate assets was $1.0 million and $1.7 million for the three months ended September 30, 2021 and 2020, respectively, and $3.3 million and $5.2 million for the nine months ended September 30, 2021 and 2020, respectively.

The following table presents the Partnership’s estimated amortization expense related to lease intangibles for the periods indicated (in thousands):

Remainder of
2021		2022		2023		2024		2025		Thereafter
$	483	$	623	$	763	$	874	$	816	$	212

See Note 4—Divestitures for discussion of the Partnership’s significant real estate divestiture.

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PROPERTY, PLANT AND EQUIPMENT

9 Months Ended

Sep. 30, 2021

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT

The following table sets forth the Partnership’s property, plant and equipment:

		As of
	Estimated Useful Lives	September 30, 2021		December 31, 2020
	(Years)	(In thousands)
Produced water disposal systems	10-30	$	671,577	$	654,545
Crude oil gathering systems(1)	30	135,613		133,998
Natural gas gathering and compression systems(1)	10-30	6,115		112,072
Sourced water gathering systems(1)	30	108,727		112,162
Auto and trucks	3	374		—
Computer software	3	244		—
Total property, plant and equipment		922,650		1,012,777
Less: accumulated depreciation, amortization and accretion		(111,995)		(100,728)
Land	N/A	85,826		85,826
Total property, plant and equipment, net		$	896,481	$	997,875

(1)Included in gathering systems are $13.6 million and $27.5 million of assets at September 30, 2021 and December 31, 2020, respectively, that are not subject to depreciation, amortization and accretion as the systems were under construction and had not yet been put into service.

Depreciation expense related to property, plant and equipment was $10.1 million and $8.9 million for the three months ended September 30, 2021 and 2020, respectively, and $33.7 million and $29.4 million for the nine months ended September 30, 2021 and 2020, respectively.

Capitalized internal costs and capitalized interest related to property, plant and equipment were immaterial for the three and nine months ended September 30, 2021 and 2020.

The Partnership evaluates its long-lived assets for potential impairment whenever events or circumstances indicate it is more likely than not that the carrying amount of the asset, or set of assets, is greater than the fair value. An impairment involves comparing the estimated future undiscounted cash flows of an asset with the carrying amount. If the carrying amount of the asset exceeds the estimated future undiscounted cash flows, then an impairment charge is recorded for the difference between the estimated fair value of the asset and its carrying value. No such impairment charges were recorded during the three months ended September 30, 2021, or the three and nine months ended September 30, 2020. Abandonment charges of $3.4 million related to projects which had begun, but were later terminated, were recorded in depreciation, amortization and accretion on the consolidated statement of operations during the nine months ended September 30, 2021. It is possible that circumstances requiring additional impairment testing will occur in future interim periods, which could result in potentially material impairment charges being recorded.

Assets held for sale

At September 30, 2021, the Partnership classified certain gas gathering assets with a carrying value of $83.3 million as held for sale in the consolidated balance sheet. The net realizable value of these assets approximates the carrying value based on the expected sales price negotiated with a third party purchaser as discussed further in Note 16—Subsequent Events.

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EQUITY METHOD INVESTMENTS

9 Months Ended

Sep. 30, 2021

Equity Method Investments and Joint Ventures [Abstract]

EQUITY METHOD INVESTMENTS

EQUITY METHOD INVESTMENTS

The following table presents the carrying values of the Partnership’s equity method investments as of the dates indicated:

	Ownership Interest		September 30, 2021		December 31, 2020
			(In thousands)
EPIC Crude Holdings, LP	10	%	$	111,785	$	120,863
Gray Oak Pipeline, LLC	10	%	121,411		130,353
Wink to Webster Pipeline LLC (1)	4	%	86,286		82,631
OMOG JV LLC	60	%	189,418		193,726
Amarillo Rattler, LLC (2)	—	%	—		5,354
Remuda Midstream Holdings LLC (3)	—	%	274		—
Total			$	509,174	$	532,927

(1)The Wink to Webster joint venture is developing a crude oil pipeline (the “Wink to Webster pipeline”). The Wink to Webster pipeline’s main segment began interim service operation in the fourth quarter of 2020, and the joint venture is expected to begin full commercial operations in the first quarter of 2022.

(2)The ownership interest in Amarillo Rattler was 50% at December 31, 2020. See Note 4—Divestitures for discussion regarding the sale of this equity method investment during the second quarter of 2021.

(3)Includes $0.3 million of direct transaction costs incurred in the third quarter of 2021 for the acquisition of the WTG Joint Venture in the fourth quarter of 2021 as defined and discussed further in Note 16—Subsequent Events.

Currently, the Partnership receives distributions from Gray Oak and OMOG, which are classified either within the operating or investing sections of the consolidated statements of cash flows by determining the nature of each distribution. The following table presents total distributions received from the Partnership’s equity method investments for the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Gray Oak Pipeline, LLC	$	7,847	$	5,720	$	19,140	$	14,771
OMOG JV LLC	6,382		3,900		13,251		12,719
Total	$	14,229	$	9,620	$	32,391	$	27,490

The following table summarizes the income (loss) of equity method investees reflected in the condensed consolidated statement of operations for the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
EPIC Crude Holdings, LP	$	(2,530)	$	(1,904)	$	(10,638)	$	(4,703)
Gray Oak Pipeline, LLC	4,368		3,832		10,198		5,585
Wink to Webster Pipeline LLC	(550)		(127)		(1,641)		73
OMOG JV LLC	3,537		1,499		8,943		(10,681)
Amarillo Rattler, LLC	—		69		(388)		(184)
Total	$	4,825	$	3,369	$	6,474	$	(9,910)

The Partnership reviews its equity method investments to determine if a loss in value which is other than temporary has occurred. If such a loss has occurred, the Partnership recognizes an impairment provision. During the three and nine months ended September 30, 2021, the Partnership’s income (loss) from equity method investments includes a proportional charge of $0.6 million and $3.5 million, respectively, representing impairment recorded by the investee associated with inventory write-downs and abandoned projects. During the three and nine months ended September 30, 2020, the Partnership’s income (loss) from equity method investments includes a proportional charge of $15.8 million representing goodwill impairment recorded by an investee. No other impairments were recorded for the Partnership’s equity method investments for the three and nine months ended September 30, 2021 or 2020. The entities in which the Partnership is invested all serve customers in the oil and natural gas industry, which experienced economic challenges due to the COVID-19 pandemic and other macroeconomic factors during 2020. If similar economic challenges occur in future interim periods, it could result in circumstances requiring the Partnership to record potentially material impairment charges on its equity method investments.

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DEBT

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

DEBT

DEBT

Long-term debt consisted of the following as of the dates indicated:

	September 30, 2021		December 31, 2020
	(In thousands)
5.625% Senior Notes due 2025	$	500,000	$	500,000
Operating Company revolving credit facility	—		79,000
Unamortized debt issuance costs	(7,544)		(9,053)
Total long-term debt	$	492,456	$	569,947

The Operating Company’s Revolving Credit Facility

The Operating Company’s credit agreement (the “Credit Agreement”) provides for a revolving credit facility in the maximum amount of $600.0 million, which is expandable to $1.0 billion upon the Partnership’s election, subject to obtaining additional lender commitments and satisfaction of customary conditions. Loan principal may be optionally repaid from time to time without premium or penalty (other than customary LIBOR breakage), and is required to be paid at the maturity date of May 28, 2024. As of September 30, 2021, the Operating Company had no outstanding borrowings and $600.0 million available for future borrowings under the Credit Agreement. During the three and nine months ended September 30, 2021, the weighted average interest rate on borrowings under the Credit Agreement was 1.34% and 1.38%, respectively. During the three and nine months ended September 30, 2020, the weighted average interest rate on borrowings under the Credit Agreement was 1.46% and 2.18%, respectively.

As of September 30, 2021, the Operating Company was in compliance with all financial maintenance covenants under the Credit Agreement.

2025 Senior Notes

On July 14, 2020, the Partnership completed a notes offering (the “Notes Offering”) of $500.0 million in aggregate principal amount of its 5.625% Senior Notes due 2025 (the “Notes”). Interest on the Notes is payable on January 15 and July 15 of each year, beginning on January 15, 2021. The Notes mature on July 15, 2025. The Partnership received net proceeds of approximately $489.5 million from the Notes Offering. The Partnership loaned the gross proceeds of $500.0 million to the Operating Company, which used such proceeds to pay down borrowings under the Credit Agreement.

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UNIT-BASED COMPENSATION

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

UNIT-BASED COMPENSATION

UNIT-BASED COMPENSATIONOn May 22, 2019, the board of directors of the General Partner adopted the Rattler Midstream LP Long Term Incentive Plan (“LTIP”) for employees, consultants and directors of the General Partner and any of its affiliates, including Diamondback, who perform services for the Partnership. The LTIP provides for the grant of unit options, unit appreciation rights, restricted units, unit awards, phantom units, distribution equivalent rights, cash awards, performance awards, other unit-based awards and substitute awards. As of September 30, 2021, a total of 14,535,791 common units had been reserved for issuance pursuant to the LTIP. Common units that are cancelled, forfeited or withheld to satisfy exercise prices or tax withholding obligations will be available for delivery pursuant to other awards. The LTIP is administered by the board of directors of the General Partner or a committee thereof.

Phantom Units

Under the LTIP, the board of directors of the General Partner is authorized to issue phantom units to eligible employees and non-employee directors. The Partnership estimates the fair value of phantom units based on the closing price of the Partnership’s common units on the grant date of the award, and expenses this value over the applicable vesting period. Upon vesting, the phantom units entitle the recipient to one common unit of the Partnership for each phantom unit. The recipients are also entitled to distribution equivalent rights, which represent the right to receive a cash payment equal to the value of the distributions paid on one phantom unit between the grant date and the vesting date.

The following table presents the phantom unit activity under the LTIP for the nine months ended September 30, 2021:

	Phantom Units	Weighted Average Grant-Date Fair Value
Unvested at December 31, 2020	2,089,668	$	17.07
Granted	238,399	$	10.99
Vested	(469,221)	$	18.37
Forfeited	(32,100)	$	6.72
Unvested at September 30, 2021	1,826,746	$	16.12

The aggregate fair value of phantom units that vested during the nine months ended September 30, 2021 was $8.6 million. As of September 30, 2021, the unrecognized compensation cost related to unvested phantom units was $25.4 million, and is expected to be recognized over a weighted-average period of 2.54 years. For the three and nine months ended September 30, 2021, the Partnership incurred $2.5 million and $7.3 million, respectively, of unit–based compensation expense. For the three and nine months ended September 30, 2020, the Partnership incurred $2.2 million and $6.6 million, respectively, of unit–based compensation expense.

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UNITHOLDERS’ EQUITY AND DISTRIBUTIONS

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

UNITHOLDERS’ EQUITY AND DISTRIBUTIONS

UNITHOLDERS’ EQUITY AND DISTRIBUTIONS

The Partnership has general partner and limited partner units. At September 30, 2021, the Partnership had a total of 39,960,128 common units issued and outstanding and 107,815,152 Class B units issued and outstanding, of which no common units and 107,815,152 Class B units, representing approximately 73% of the Partnership’s total units outstanding, were beneficially owned by Diamondback. At September 30, 2021, Diamondback also beneficially owned 107,815,152 Operating Company units, representing an overall 73% economic, non-voting interest in the Operating Company. The Operating Company units and the Partnership’s Class B units beneficially owned by Diamondback are exchangeable from time to time for the Partnership’s common units (that is, one Operating Company unit and one Partnership Class B unit, together, will be exchangeable for one Partnership common unit).

Common Unit Repurchase Program

On October 29, 2020, the board of directors of the General Partner approved a common unit repurchase program to acquire up to $100 million of the Partnership’s outstanding common units. The common unit repurchase program was authorized to extend through December 31, 2021, but in October 2021, the board of directors of the General Partner increased the repurchase program authorization to $150.0 million and extended the program indefinitely. The Partnership intends to purchase common units under the repurchase program opportunistically with cash on hand, free cash flow from operations and proceeds from potential liquidity events such as the sale of assets. The repurchase program may be suspended from time to time, modified, extended or discontinued by the board of directors of the General Partner at any time. Purchases under the repurchase program may be made from time to time in open market or privately negotiated transactions in compliance with Rule 10b-18 under the Securities Exchange Act of 1934, as amended, and will be subject to market conditions, applicable legal requirements, contractual obligations and other factors. Any common units purchased as part of this program will be retired During the three and nine months ended September 30, 2021, the Partnership repurchased approximately $12.3 million and $28.6 million, respectively, of common units under the repurchase program. As of September 30, 2021, $56.6 million remained available for use to repurchase common units under the Partnership’s common unit repurchase program.

Changes in Ownership of Consolidated Subsidiaries

Non-controlling interest in the accompanying condensed consolidated financial statements represents Diamondback’s ownership in the net assets of the Operating Company. Diamondback’s relative ownership interest in the Operating Company can change due to the Partnership’s public offerings, issuance of units for acquisitions, issuance of unit-based compensation, repurchases of common units and distribution equivalent rights paid on the Partnership’s units. These changes in ownership percentage and the disproportionate allocation of net income to Diamondback discussed below result in adjustments to non-controlling interest and common unitholder equity, tax effected.

The following table summarizes changes in the ownership interest in consolidated subsidiaries during the period:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Net income (loss) attributable to the Partnership	$	8,485	$	9,218	$	26,945	$	25,071
Change in ownership of consolidated subsidiaries	1,160		—		3,813		(329,034)
Change from net income (loss) attributable to the Partnership's unitholders and transfers to non-controlling interest	$	9,645	$	9,218	$	30,758	$	(303,963)

In the second quarter of 2020, the Partnership recorded adjustments to non-controlling interest of $419.6 million, common unitholder equity of $(329.0) million, and deferred tax assets of $90.6 million to reflect the ownership structure that was effective at June 30, 2020. The adjustment had no impact on earnings for the three and nine months ended September 30, 2020.

Cash Distributions on Common Units

The board of directors of the General Partner sets and administers the cash distribution policies for the Partnership and the Operating Company. Cash distributions paid by the Operating Company to Diamondback and the Partnership as the holders of the Operating Company’s common units are determined by the board of directors of the General Partner on a quarterly basis. The partnership agreement does not require the Partnership to pay minimum distributions to its common unitholders on a quarterly or other basis, and the Partnership does not employ structures intended to consistently maintain or increase distributions over time. On October 27, 2021, the board of directors of the General Partner approved a cash distribution for the third quarter of 2021 of $0.25 per Operating Company unit and per common unit. Distributions due to common unitholders are payable on November 22, 2021, to common unitholders of record at the close of business on November 15, 2021. The board of directors of the General Partner may change the distribution policies at any time and from time to time.

The following table presents information regarding cash distributions approved by the board of directors of the General Partner and paid during the three and nine months ended September 30, 2021:

			Distributions
			(in thousands)
Period	Amount per Unit		Operating Company Distributions to Diamondback		Common Unitholders		Declaration Date	Unitholder Record Date	Payment Date
Q4 2020	$	0.20	$	21,563	$	8,263	February 17, 2021	March 8, 2021	March 15, 2021
Q1 2021	$	0.20	$	21,563	$	8,183	April 28, 2021	May 14, 2021	May 21, 2021
Q2 2021	$	0.25	$	26,954	$	10,154	August 2, 2021	August 16, 2021	August 23, 2021

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EARNINGS PER COMMON UNIT

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

EARNINGS PER COMMON UNIT

EARNINGS PER COMMON UNITEarnings per common unit on the condensed consolidated statements of operations is based on the net income of the Partnership for the three and nine months ended September 30, 2021 and 2020, which is the amount of net income that is attributable to the Partnership’s common units. The Partnership’s net income is allocated wholly to the common units, as the General Partner does not have an economic interest.

Basic and diluted earnings per common unit is calculated using the two-class method. The two-class method is an earnings allocation proportional to the respective ownership among holders of common units and participating securities. Basic earnings per common unit is calculated by dividing net income by the weighted-average number of common units outstanding during the period. Diluted earnings per common unit also considers the dilutive effect of unvested common units granted under the LTIP, calculated using the treasury stock method.

A reconciliation of the components of basic and diluted earnings per common unit is presented in the table below:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands, except per unit amounts)
Net income (loss) attributable to Rattler Midstream LP	$	8,485	$	9,218	$	26,945	$	25,071
Less: net (income) loss allocated to participating securities(1)	(458)		(524)		(1,332)		(1,820)
Net income (loss) attributable to common unitholders	$	8,027	$	8,694	$	25,613	$	23,251
Weighted average common units outstanding:
Basic weighted average common units outstanding	40,542		43,996		41,101		43,837
Effect of dilutive securities:
Potential common units issuable(2)	—		—		—		—
Diluted weighted average common units outstanding	40,542		43,996		41,101		43,837
Net income per common unit, basic	$	0.20	$	0.20	$	0.62	$	0.53
Net income per common unit, diluted	$	0.20	$	0.20	$	0.62	$	0.53

(1)    Distribution equivalent rights granted to employees are considered participating securities.

(2)    For the three and nine months ended September 30, 2021 and 2020, no potential common units were included in the computation of diluted earnings per unit because their inclusion would have been anti-dilutive under the treasury stock method for the periods presented. However, such potential common units could dilute basic earnings per unit in future periods.

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RELATED PARTY TRANSACTIONS

9 Months Ended

Sep. 30, 2021

Related Party Transactions [Abstract]

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS

Related party transactions include transactions with Diamondback. The Partnership has entered into certain agreements that govern these transactions, the most significant of which are commercial agreements for the provision of midstream services to Diamondback. The Partnership derives substantially all of its revenue from these commercial agreements, which consist of the following amounts for the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Produced water gathering and disposal	$	63,202	$	66,067	$	194,895	$	211,353
Sourced water gathering	16,833		11,948		48,105		46,845
Natural gas gathering	5,696		5,076		17,021		14,506
Crude oil gathering	1,835		2,745		6,022		7,730
Surface revenue	47		10		227		26
Total	$	87,613	$	85,846	$	266,270	$	280,460

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INCOME TAXES

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

The following table provides the Partnership’s provision for (benefit from) income taxes and the effective income tax rate for the periods indicated:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020
	(In thousands, except for tax rate)
Provision for (benefit from) income taxes	$	2,551		$	2,851		$	7,761		$	7,754
Effective tax rate	6.1		%	6.8		%	6.1		%	6.8		%

The Partnership’s effective income tax rates for the three and nine months ended September 30, 2021 and 2020 differed from amounts computed by applying the United States federal statutory tax rate to pre-tax income for the period, primarily due to net income attributable to the non-controlling interest and to state taxes, net of federal benefit. For the three and nine months ended September 30, 2021 and 2020 the Partnership recorded immaterial discrete income tax expense primarily related to unit-based compensation.

The Partnership’s total net deferred tax assets consist primarily of the tax basis over the financial statement carrying value of its investment in the Operating Company and of net operating loss carryforwards. In the second quarter of 2020, the Partnership recorded an adjustment through unitholders’ equity to the carrying value of its investment in the Operating Company, resulting in a decrease in the Partnership’s deferred tax liability related to its investment in the Operating Company. As a result of management’s assessment each period, including consideration of all available positive and negative evidence, management continued to determine that it is more likely than not that the Partnership will realize its deferred tax assets as of September 30, 2021 and 2020.

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FAIR VALUE MEASUREMENTS

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs.

The fair value hierarchy is based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value. The Partnership’s assessment of the significance of a particular input to the fair value measurements requires judgment and may affect the valuation of the assets and liabilities being measured and their placement within the fair value hierarchy. The Partnership uses appropriate valuation techniques based on available inputs to measure the fair values of its assets and liabilities.

Level 1 - Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets as of the reporting date.

Level 2 - Observable market-based inputs or unobservable inputs that are corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reporting date.

Level 3 - Unobservable inputs that are not corroborated by market data and may be used with internally developed methodologies that result in management’s best estimate of fair value.

Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement.

Assets and Liabilities Not Recorded at Fair Value

The following table provides the fair value of financial instruments that are not recorded at fair value in the condensed consolidated balance sheets:

	September 30, 2021				December 31, 2020
	Carrying Value(1)		Fair Value		Carrying Value(1)		Fair Value
	(In thousands)
Debt:
5.625% Senior Notes due 2025	$	492,456	$	522,330	$	490,947	$	528,125
Operating Company revolving credit facility	$	—	$	—	$	79,000	$	79,000

(1) The carrying value includes associated deferred loan costs and any remaining discount or premium, if any.

The fair value of the Operating Company’s revolving credit facility approximates its carrying value based on borrowing rates available to the Partnership for bank loans with similar terms and maturities and is classified as Level 2 in the fair value hierarchy. The fair value of the Notes was determined using the quoted market price at the respective period ends, and is considered a Level 1 classification in the fair value hierarchy.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Certain assets and liabilities are measured at fair value on a nonrecurring basis in certain circumstances. These assets and liabilities can include inventory, midstream assets and other long-lived assets that are written down to fair value when they are impaired or held for sale. Refer to Note 6—Property, Plant and Equipment for additional discussion of nonrecurring fair value adjustments.

Fair Value of Financial Assets

The Partnership has other financial instruments consisting of cash, accounts receivable, other current assets, accounts payable, accrued liabilities and various other current liabilities. The carrying value of these instruments approximates fair value because of the short-term nature of the instruments.

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COMMITMENTS AND CONTINGENCIES

9 Months Ended

Sep. 30, 2021

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

The Partnership may be a party to various routine legal proceedings, disputes and claims from time to time arising in the ordinary course of its business, including those that arise from interpretation of federal and state laws and regulations regarding air and water quality, hazardous and solid waste disposal and other environmental matters. The Partnership’s management believes there are currently no such matters that, if decided adversely, will have a material adverse effect on the Partnership’s financial condition, results of operations or cash flows.

Commitments

As of September 30, 2021, the Partnership’s anticipated future capital commitments for its equity method investments include $6.0 million for the remainder of 2021 and $22.7 million in aggregate.

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SUBSEQUENT EVENTS

9 Months Ended

Sep. 30, 2021

Subsequent Events [Abstract]

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS

Cash Distribution

On October 27, 2021, the board of directors of the General Partner approved a cash distribution for the third quarter of 2021 of $0.25 per common unit, payable on November 22, 2021, to unitholders of record at the close of business on November 15, 2021.

Acquisitions and Divestitures

WTG Joint Venture Acquisition

On October 5, 2021, the Partnership and a private affiliate of an investment fund formed Remuda Midstream Holdings LLC (the “WTG joint venture”). The Operating Company invested approximately $104.0 million in cash to acquire a 25% interest in the WTG joint venture, which then completed an acquisition of a majority interest in WTG Midstream LLC (“WTG Midstream”) from West Texas Gas, Inc. and its affiliates. WTG Midstream’s assets primarily consist of an interconnected gas gathering system and six major gas processing plants servicing the Midland Basin with 925 MMcf/d of total processing capacity with additional gas gathering and processing expansions planned.

Drop Down Transaction

On October 19, 2021, the Partnership entered into a definitive purchase and sale agreement with Diamondback and certain of its subsidiaries (the “Seller”) for the Operating Company’s acquisition from the Seller of certain water midstream assets (the “Drop Down assets”) for $160.0 million in cash in a drop down transaction (the “Drop Down”). The Partnership and the Seller have also mutually agreed to amend their commercial agreements covering produced water gathering and disposal and sourced water gathering services to add certain Diamondback leasehold acreage to the Partnership’s dedication. The Drop Down assets have a carrying value of $160.0 million and include nine active saltwater disposal injection wells with 330 MBbl/d of capacity, seven produced water recycling and storage facilities, 20 fresh water pits and approximately 4,000 acres of fee surface. Also included are 55 miles of produced water gathering pipeline and 18 miles of sourced water gathering pipeline. The Partnership intends to fund the transaction with cash on hand and borrowings under its revolving credit facility. The Drop Down, which was approved by the Conflicts Committee of the board of directors of the General Partner, will be accounted for as a transaction between entities under common control and is expected to close in the fourth quarter of 2021, subject to customary closing conditions.

Pecos County Gas Gathering Divestiture

On November 1, 2021, the Partnership completed the sale of its gas gathering assets to Brazos Delaware Gas, LLC, an affiliate of Brazos Midstream, for aggregate total gross potential consideration of $93.0 million, consisting of (i) $83.0 million due at closing, subject to customary closing adjustments, (ii) a $5.0 million contingent payment due in 2023 if the aggregate actual deliveries of gas volumes into the gas gathering system by and/or on behalf of Diamondback and its affiliates exceed certain specified thresholds during 2022, and (iii) a $5.0 million contingent payment due in 2024 if the aggregate actual deliveries of gas volumes into the gas gathering system by and/or on behalf of Diamondback and its affiliates exceed certain specified thresholds during 2022 and 2023. The contingent payments will be recorded if and when they become realizable.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying condensed consolidated financial statements and related notes thereto were prepared in accordance with GAAP. All significant intercompany balances and transactions have been eliminated upon consolidation. The Partnership reports its operations in one reportable segment. Effective in the first quarter of fiscal 2021, the Partnership determined the former real estate operations segment no longer met the criteria to be an operating segment due to a change in focus and the relative immateriality of the activity.

These condensed consolidated financial statements have been prepared by the Partnership without audit, pursuant to the rules and regulations of the SEC. They reflect all adjustments that are, in the opinion of management, necessary for a fair statement of the results for interim periods, on a basis consistent with the annual audited financial statements. All such adjustments are of a normal recurring nature. Certain information, accounting policies and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted pursuant to SEC rules and regulations, although the Partnership believes the disclosures are adequate to make the information presented not misleading. This Quarterly Report on Form 10–Q should be read in conjunction with the Partnership’s most recent Annual Report on Form 10-K for the fiscal year ended December 31, 2020, which contains a summary of the Partnership’s significant accounting policies and other disclosures.

Reclassifications

Reclassifications

Certain prior period amounts have been reclassified to conform to the current period financial statement presentation. These reclassifications had no effect on the previously reported total assets, total liabilities, unitholders’ equity, results of operations or cash flows.

Use of Estimates

Use of Estimates

Certain amounts included in or affecting the Partnership’s financial statements and related notes must be estimated by management, requiring certain assumptions to be made with respect to values or conditions that cannot be known with certainty at the time the financial statements are prepared. These estimates and assumptions affect the amounts the Partnership reports for assets and liabilities and the Partnership’s disclosure of contingent assets and liabilities as of the date of the financial statements.

Making accurate estimates and assumptions is particularly difficult in the oil and natural gas industry given the challenges resulting from volatility in oil and natural gas prices. For instance, in 2020, the effects of COVID-19, and actions by OPEC members and other exporting nations on the supply and demand in global oil and natural gas markets, resulted in significant negative pricing pressure in the first half of 2020, followed by a recovery in pricing and an increase in demand in the second half of 2020 and into 2021. However, the COVID-19 Delta variant emerged in March 2021 and became highly transmissible in July 2021, which contributed to additional pricing volatility during the third quarter of 2021. Many companies in the oil and natural gas industry, including Diamondback, changed their business plans in response to changing market conditions. Such circumstances generally increase the uncertainty in the Partnership’s accounting estimates, particularly those involving financial forecasts.

The Partnership evaluates these estimates on an ongoing basis, using historical experience, consultation with experts and other methods it considers reasonable in each particular circumstance. Nevertheless, actual results may differ significantly from the Partnership’s estimates. Any effects on the Partnership’s business, financial position or results of operations resulting from revisions to these estimates are recorded in the period in which the facts that give rise to the revision become known. Significant items subject to such estimates and assumptions include, but are not limited to, (i) revenue accruals, (ii) the fair value of long-lived assets, (iii) asset retirement obligations and (iv) income taxes.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Recently Adopted Pronouncements

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes.” This update is intended to simplify the accounting for income taxes by removing certain exceptions and by clarifying and amending existing guidance. This update is effective for public business entities beginning after December 15, 2020, with early adoption permitted. The Partnership adopted this update effective January 1, 2021. The adoption of this update did not have a material impact on its financial position, results of operations or liquidity.

The Partnership considers the applicability and impact of all ASUs. ASUs not discussed above were assessed and determined to be either not applicable or clarifications of ASUs previously disclosed.

Revenue From Contract with Customers

The Partnership generates revenues by charging fees on a per unit basis for gathering crude oil and natural gas, delivering and storing sourced water, and collecting, recycling and disposing of produced water.

Surface revenue, rental and real estate income and amortization of out of market leases are outside the scope of ASC Topic 606, “Revenue from Contracts with Customers.”

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs.

The fair value hierarchy is based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value. The Partnership’s assessment of the significance of a particular input to the fair value measurements requires judgment and may affect the valuation of the assets and liabilities being measured and their placement within the fair value hierarchy. The Partnership uses appropriate valuation techniques based on available inputs to measure the fair values of its assets and liabilities.

Level 1 - Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets as of the reporting date.

Level 2 - Observable market-based inputs or unobservable inputs that are corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reporting date.

Level 3 - Unobservable inputs that are not corroborated by market data and may be used with internally developed methodologies that result in management’s best estimate of fair value.

Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Schedule of Accrued Liabilities and Accounts Payable

Accrued liabilities consist of the following as of the dates indicated:

	September 30, 2021		December 31, 2020
	(In thousands)
Direct operating expenses accrued	$	15,043	$	18,160
Capital expenditures accrued	6,868		5,328
Interest expense accrued	5,859		12,969
Sourced water purchases accrued	5,704		3,597
Accounts Payable	5,752		139
Other	1,899		2,454
Accounts payable and accrued liabilities	$	41,125	$	42,647

Schedule of Accumulated Other Comprehensive Income

The following table provides changes in the components of accumulated other comprehensive income, net of related income tax effects (in thousands):

Balance as of December 31, 2020	$	(525)
Other comprehensive income (loss)	535
Balance as of September 30, 2021	$	10

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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables)

9 Months Ended

Sep. 30, 2021

Revenue Recognition and Deferred Revenue [Abstract]

Schedule of Disaggregation of Revenue From Contracts With Customers

In the following table, revenue from contracts with customers is disaggregated by type of service and fee:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Type of Service:
Produced water gathering and disposal	$	64,943	$	67,800	$	199,876	$	217,646
Sourced water gathering	16,832		12,653		49,514		48,308
Crude oil gathering	5,933		7,531		19,521		22,617
Natural gas gathering	5,697		5,076		17,021		14,506
Real estate contracts (non ASC 606 revenues)	3,072		3,464		10,266		10,705
Surface revenue (non ASC 606 revenues)	93		15		311		887
Total revenues	$	96,570	$	96,539	$	296,509	$	314,669

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REAL ESTATE ASSETS (Tables)

9 Months Ended

Sep. 30, 2021

Real Estate [Abstract]

Schedule of Real Estate Assets and Intangible Lease Assets

The following schedules present the cost and related accumulated depreciation or amortization (as applicable) of the Partnership’s real estate assets and intangible lease assets:

		As of
	Estimated Useful Lives	September 30, 2021		December 31, 2020
	(Years)	(In thousands)
Buildings	20-30	$	94,760	$	102,918
Tenant improvements	15	4,506		4,506
Land	N/A	947		2,437
Land improvements	15	484		484
Total real estate assets		100,697		110,345
Less: accumulated depreciation		(15,358)		(13,658)
Total investment in real estate, net		$	85,339	$	96,687

		As of
	Weighted Average Useful Lives	September 30, 2021		December 31, 2020
	(Months)	(In thousands)
In-place lease intangibles	45	$	11,580	$	11,405
Less: accumulated amortization		(9,416)		(8,980)
In-place lease intangibles, net		2,164		2,425
Above-market lease intangibles	45	3,623		3,623
Less: accumulated amortization		(2,016)		(1,786)
Above-market lease intangibles, net		1,607		1,837
Total intangible lease assets, net		$	3,771	$	4,262

Schedule of Amortization Expense

The following table presents the Partnership’s estimated amortization expense related to lease intangibles for the periods indicated (in thousands):

Remainder of
2021		2022		2023		2024		2025		Thereafter
$	483	$	623	$	763	$	874	$	816	$	212

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PROPERTY, PLANT AND EQUIPMENT (Tables)

9 Months Ended

Sep. 30, 2021

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

The following table sets forth the Partnership’s property, plant and equipment:

		As of
	Estimated Useful Lives	September 30, 2021		December 31, 2020
	(Years)	(In thousands)
Produced water disposal systems	10-30	$	671,577	$	654,545
Crude oil gathering systems(1)	30	135,613		133,998
Natural gas gathering and compression systems(1)	10-30	6,115		112,072
Sourced water gathering systems(1)	30	108,727		112,162
Auto and trucks	3	374		—
Computer software	3	244		—
Total property, plant and equipment		922,650		1,012,777
Less: accumulated depreciation, amortization and accretion		(111,995)		(100,728)
Land	N/A	85,826		85,826
Total property, plant and equipment, net		$	896,481	$	997,875

(1)Included in gathering systems are $13.6 million and $27.5 million of assets at September 30, 2021 and December 31, 2020, respectively, that are not subject to depreciation, amortization and accretion as the systems were under construction and had not yet been put into service.

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EQUITY METHOD INVESTMENTS (Tables)

9 Months Ended

Sep. 30, 2021

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Equity Method Investments

The following table presents the carrying values of the Partnership’s equity method investments as of the dates indicated:

	Ownership Interest		September 30, 2021		December 31, 2020
			(In thousands)
EPIC Crude Holdings, LP	10	%	$	111,785	$	120,863
Gray Oak Pipeline, LLC	10	%	121,411		130,353
Wink to Webster Pipeline LLC (1)	4	%	86,286		82,631
OMOG JV LLC	60	%	189,418		193,726
Amarillo Rattler, LLC (2)	—	%	—		5,354
Remuda Midstream Holdings LLC (3)	—	%	274		—
Total			$	509,174	$	532,927

(1)The Wink to Webster joint venture is developing a crude oil pipeline (the “Wink to Webster pipeline”). The Wink to Webster pipeline’s main segment began interim service operation in the fourth quarter of 2020, and the joint venture is expected to begin full commercial operations in the first quarter of 2022.

(2)The ownership interest in Amarillo Rattler was 50% at December 31, 2020. See Note 4—Divestitures for discussion regarding the sale of this equity method investment during the second quarter of 2021.

(3)Includes $0.3 million of direct transaction costs incurred in the third quarter of 2021 for the acquisition of the WTG Joint Venture in the fourth quarter of 2021 as defined and discussed further in Note 16—Subsequent Events.

Currently, the Partnership receives distributions from Gray Oak and OMOG, which are classified either within the operating or investing sections of the consolidated statements of cash flows by determining the nature of each distribution. The following table presents total distributions received from the Partnership’s equity method investments for the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Gray Oak Pipeline, LLC	$	7,847	$	5,720	$	19,140	$	14,771
OMOG JV LLC	6,382		3,900		13,251		12,719
Total	$	14,229	$	9,620	$	32,391	$	27,490

The following table summarizes the income (loss) of equity method investees reflected in the condensed consolidated statement of operations for the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
EPIC Crude Holdings, LP	$	(2,530)	$	(1,904)	$	(10,638)	$	(4,703)
Gray Oak Pipeline, LLC	4,368		3,832		10,198		5,585
Wink to Webster Pipeline LLC	(550)		(127)		(1,641)		73
OMOG JV LLC	3,537		1,499		8,943		(10,681)
Amarillo Rattler, LLC	—		69		(388)		(184)
Total	$	4,825	$	3,369	$	6,474	$	(9,910)

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DEBT (Tables)

9 Months Ended

Sep. 30, 2021

Debt Disclosure [Abstract]

Schedule of Long-term Debt

Long-term debt consisted of the following as of the dates indicated:

	September 30, 2021		December 31, 2020
	(In thousands)
5.625% Senior Notes due 2025	$	500,000	$	500,000
Operating Company revolving credit facility	—		79,000
Unamortized debt issuance costs	(7,544)		(9,053)
Total long-term debt	$	492,456	$	569,947

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UNIT-BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Non vested Share Activity

The following table presents the phantom unit activity under the LTIP for the nine months ended September 30, 2021:

	Phantom Units	Weighted Average Grant-Date Fair Value
Unvested at December 31, 2020	2,089,668	$	17.07
Granted	238,399	$	10.99
Vested	(469,221)	$	18.37
Forfeited	(32,100)	$	6.72
Unvested at September 30, 2021	1,826,746	$	16.12

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UNITHOLDERS’ EQUITY AND DISTRIBUTIONS (Tables)

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of Change in Ownership Interest

The following table summarizes changes in the ownership interest in consolidated subsidiaries during the period:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Net income (loss) attributable to the Partnership	$	8,485	$	9,218	$	26,945	$	25,071
Change in ownership of consolidated subsidiaries	1,160		—		3,813		(329,034)
Change from net income (loss) attributable to the Partnership's unitholders and transfers to non-controlling interest	$	9,645	$	9,218	$	30,758	$	(303,963)

Schedule of Cash Distributions

The following table presents information regarding cash distributions approved by the board of directors of the General Partner and paid during the three and nine months ended September 30, 2021:

			Distributions
			(in thousands)
Period	Amount per Unit		Operating Company Distributions to Diamondback		Common Unitholders		Declaration Date	Unitholder Record Date	Payment Date
Q4 2020	$	0.20	$	21,563	$	8,263	February 17, 2021	March 8, 2021	March 15, 2021
Q1 2021	$	0.20	$	21,563	$	8,183	April 28, 2021	May 14, 2021	May 21, 2021
Q2 2021	$	0.25	$	26,954	$	10,154	August 2, 2021	August 16, 2021	August 23, 2021

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EARNINGS PER COMMON UNIT (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Net Income per Common Unit

A reconciliation of the components of basic and diluted earnings per common unit is presented in the table below:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands, except per unit amounts)
Net income (loss) attributable to Rattler Midstream LP	$	8,485	$	9,218	$	26,945	$	25,071
Less: net (income) loss allocated to participating securities(1)	(458)		(524)		(1,332)		(1,820)
Net income (loss) attributable to common unitholders	$	8,027	$	8,694	$	25,613	$	23,251
Weighted average common units outstanding:
Basic weighted average common units outstanding	40,542		43,996		41,101		43,837
Effect of dilutive securities:
Potential common units issuable(2)	—		—		—		—
Diluted weighted average common units outstanding	40,542		43,996		41,101		43,837
Net income per common unit, basic	$	0.20	$	0.20	$	0.62	$	0.53
Net income per common unit, diluted	$	0.20	$	0.20	$	0.62	$	0.53

(1)    Distribution equivalent rights granted to employees are considered participating securities.

(2)    For the three and nine months ended September 30, 2021 and 2020, no potential common units were included in the computation of diluted earnings per unit because their inclusion would have been anti-dilutive under the treasury stock method for the periods presented. However, such potential common units could dilute basic earnings per unit in future periods.

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RELATED PARTY TRANSACTIONS (Tables)

9 Months Ended

Sep. 30, 2021

Related Party Transactions [Abstract]

Schedule of Related Party Transactions

The Partnership derives substantially all of its revenue from these commercial agreements, which consist of the following amounts for the periods indicated:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Produced water gathering and disposal	$	63,202	$	66,067	$	194,895	$	211,353
Sourced water gathering	16,833		11,948		48,105		46,845
Natural gas gathering	5,696		5,076		17,021		14,506
Crude oil gathering	1,835		2,745		6,022		7,730
Surface revenue	47		10		227		26
Total	$	87,613	$	85,846	$	266,270	$	280,460

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INCOME TAXES (Tables)

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

The following table provides the Partnership’s provision for (benefit from) income taxes and the effective income tax rate for the periods indicated:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020
	(In thousands, except for tax rate)
Provision for (benefit from) income taxes	$	2,551		$	2,851		$	7,761		$	7,754
Effective tax rate	6.1		%	6.8		%	6.1		%	6.8		%

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FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value Measurement Information for Financial Instruments Measured on a Nonrecurring Basis

The following table provides the fair value of financial instruments that are not recorded at fair value in the condensed consolidated balance sheets:

	September 30, 2021				December 31, 2020
	Carrying Value(1)		Fair Value		Carrying Value(1)		Fair Value
	(In thousands)
Debt:
5.625% Senior Notes due 2025	$	492,456	$	522,330	$	490,947	$	528,125
Operating Company revolving credit facility	$	—	$	—	$	79,000	$	79,000

(1) The carrying value includes associated deferred loan costs and any remaining discount or premium, if any.

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ORGANIZATION AND BASIS OF PRESENTATION (Details)	9 Months Ended
	Sep. 30, 2021 segment shares	Oct. 29, 2021 shares	Dec. 31, 2020 shares
Limited Partners' Capital Account [Line Items]
Number of reportable segments | segment	1
Class B Units
Limited Partners' Capital Account [Line Items]
Units outstanding (in shares)	107,815,152	107,815,152	107,815,152
Class B Units | Diamondback Energy, Inc.
Limited Partners' Capital Account [Line Items]
Units outstanding (in shares)	107,815,152
Rattler MIdstream LP
Limited Partners' Capital Account [Line Items]
General partners, ownership interest	100.00%
Rattler Midstream Partners LLC
Limited Partners' Capital Account [Line Items]
General partners, ownership interest	27.00%
Rattler Midstream Partners LLC | Diamondback Energy, Inc.
Limited Partners' Capital Account [Line Items]
Limited partners, ownership interest	73.00%

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Direct operating expenses accrued	$ 15,043	$ 18,160
Capital expenditures accrued	6,868	5,328
Interest expense accrued	5,859	12,969
Sourced water purchases accrued	5,704	3,597
Accounts Payable	5,752	139
Other	1,899	2,454
Accounts payable and accrued liabilities	$ 41,125	$ 42,647

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended	9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
AOCI
Beginning balance	$ 1,186,554	$ 1,167,117	$ 1,180,100	$ 1,186,724	$ 1,127,758	$ 1,115,840	$ 1,180,100	$ 1,180,100	$ 1,115,840
Other comprehensive income (loss)	0	143	392	403	(240)	(258)	535	535	(95)
Ending balance	1,177,741	$ 1,186,554	1,167,117	$ 1,183,550	$ 1,186,724	$ 1,127,758	1,186,554	1,177,741	$ 1,183,550
AOCI
AOCI
Beginning balance			$ (525)				$ (525)	(525)
Ending balance	$ 10							$ 10

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REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Real estate contracts (non ASC 606 revenues)	$ 3,072	$ 3,464	$ 10,266	$ 10,705
Surface revenue (non ASC 606 revenues)	93	15	311	887
Total revenues	96,570	96,539	296,509	314,669
Produced water gathering and disposal
Disaggregation of Revenue [Line Items]
ASC 606 revenues	64,943	67,800	199,876	217,646
Sourced water gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues	16,832	12,653	49,514	48,308
Crude oil gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues	5,933	7,531	19,521	22,617
Natural gas gathering
Disaggregation of Revenue [Line Items]
ASC 606 revenues	$ 5,697	$ 5,076	$ 17,021	$ 14,506

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DIVESTITURES (Details) $ in Thousands				3 Months Ended		9 Months Ended
	Apr. 30, 2023 USD ($)	Jun. 28, 2021 USD ($) property	Apr. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Apr. 30, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of equity method investments				$ 31	$ 0	$ 23,020	$ 0
Loss on disposition of assets				$ 1,144	$ (16)	$ 6,155	$ 2,765
Midland, Texas
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | property		1
Proceeds from divestiture		$ 9,100
Loss on disposition of assets		$ 1,600
Amarillo Rattler, LLC | Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest			50.00%
Amarillo Rattler, LLC | Disposed of by Sale | Rattler LLC and Amarillo Midstream
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Potential consideration			$ 75,000
Consideration at closing			50,000
Consideration upon first anniversary of closing			10,000
Consideration over three years			$ 15,000
Consideration period			3 years
Amarillo Rattler, LLC | Disposed of by Sale | Rattler LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration at closing			$ 23,500
Amarillo Rattler, LLC | Disposed of by Sale | Rattler LLC | Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Potential consideration	$ 7,500							$ 5,000
Consideration period	3 years

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REAL ESTATE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Real Estate [Line Items]
Buildings	$ 94,760		$ 94,760		$ 102,918
Tenant improvements	4,506		4,506		4,506
Land	947		947		2,437
Land improvements	484		484		484
Total real estate assets	100,697		100,697		110,345
Less: accumulated depreciation	(15,358)		(15,358)		(13,658)
Total investment in real estate, net	85,339		85,339		96,687
Finite-lived intangibles assets, net	3,771		3,771		4,262
Depreciation and amortization expense for real estate assets	1,000	$ 1,700	$ 3,300	$ 5,200
In-place lease intangibles
Real Estate [Line Items]
Intangible assets, weighted average useful lives (in years)			45 months
Finite-lived intangible assets, gross	11,580		$ 11,580		11,405
Less: accumulated amortization	(9,416)		(9,416)		(8,980)
Finite-lived intangibles assets, net	2,164		$ 2,164		2,425
Above-market lease intangibles
Real Estate [Line Items]
Intangible assets, weighted average useful lives (in years)			45 months
Finite-lived intangible assets, gross	3,623		$ 3,623		3,623
Less: accumulated amortization	(2,016)		(2,016)		(1,786)
Finite-lived intangibles assets, net	$ 1,607		$ 1,607		$ 1,837
Buildings | Minimum
Real Estate [Line Items]
Property and equipment estimated useful lives (in years)			20 years
Buildings | Maximum
Real Estate [Line Items]
Property and equipment estimated useful lives (in years)			30 years
Tenant improvements
Real Estate [Line Items]
Property and equipment estimated useful lives (in years)			15 years
Land improvements
Real Estate [Line Items]
Property and equipment estimated useful lives (in years)			15 years

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REAL ESTATE ASSETS - Estimated Amortization Expense (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Real Estate [Abstract]
Remainder of 2021	$ 483
2022	623
2023	763
2024	874
2025	816
Thereafter	$ 212

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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 922,650	$ 1,012,777
Less: accumulated depreciation, amortization and accretion	(111,995)	(100,728)
Land	85,826	85,826
Total property, plant and equipment, net	896,481	997,875
Property, plant and equipment, assets	13,600	27,500
Produced water disposal systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 671,577	654,545
Crude oil gathering systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)	30 years
Property, plant and equipment	$ 135,613	133,998
Natural gas gathering and compression systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 6,115	112,072
Sourced water gathering systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)	30 years
Property, plant and equipment	$ 108,727	112,162
Auto and trucks
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)	3 years
Property, plant and equipment	$ 374	0
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)	3 years
Property, plant and equipment	$ 244	$ 0
Minimum | Produced water disposal systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)	10 years
Minimum | Natural gas gathering and compression systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)	10 years
Maximum | Produced water disposal systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)	30 years
Maximum | Natural gas gathering and compression systems
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful lives (in years)	30 years

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PROPERTY, PLANT AND EQUIPMENT - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 10,100,000	$ 8,900,000	$ 33,700,000	$ 29,400,000
Impairment and abandonments	0	$ 0	3,371,000	$ 0
Abandonment charges			3,400,000
Assets held for sale	$ 83,285,000		$ 83,285,000		$ 0

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EQUITY METHOD INVESTMENTS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 509,174		$ 509,174		$ 532,927
Distributions from equity method investments	14,229	$ 9,620	32,391	$ 27,490
Income (expense) from equity method investment	4,825	3,369	6,474	(9,910)
Impairment on equity method investments	600		3,500
Goodwill impairment charge		15,800		15,800
WTG Joint Venture Acquisition
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 300		$ 300
Disposed of by Sale | Amarillo Rattler, LLC
Schedule of Equity Method Investments [Line Items]
Ownership Interest					50.00%
EPIC Crude Holdings, LP
Schedule of Equity Method Investments [Line Items]
Ownership Interest	10.00%		10.00%
Equity method investments	$ 111,785		$ 111,785		$ 120,863
Income (expense) from equity method investment	$ (2,530)	(1,904)	$ (10,638)	(4,703)
Gray Oak Pipeline, LLC
Schedule of Equity Method Investments [Line Items]
Ownership Interest	10.00%		10.00%
Equity method investments	$ 121,411		$ 121,411		130,353
Distributions from equity method investments	7,847	5,720	19,140	14,771
Income (expense) from equity method investment	$ 4,368	3,832	$ 10,198	5,585
Wink to Webster Pipeline LLC
Schedule of Equity Method Investments [Line Items]
Ownership Interest	4.00%		4.00%
Equity method investments	$ 86,286		$ 86,286		82,631
Income (expense) from equity method investment	$ (550)	(127)	$ (1,641)	73
OMOG JV LLC
Schedule of Equity Method Investments [Line Items]
Ownership Interest	60.00%		60.00%
Equity method investments	$ 189,418		$ 189,418		193,726
Distributions from equity method investments	6,382	3,900	13,251	12,719
Income (expense) from equity method investment	$ 3,537	1,499	$ 8,943	(10,681)
Amarillo Rattler, LLC
Schedule of Equity Method Investments [Line Items]
Ownership Interest	0.00%		0.00%
Equity method investments	$ 0		$ 0		5,354
Income (expense) from equity method investment	$ 0	$ 69	$ (388)	$ (184)
Remuda Midstream Holdings, LLC
Schedule of Equity Method Investments [Line Items]
Ownership Interest	0.00%		0.00%
Equity method investments	$ 274		$ 274		$ 0

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DEBT (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jul. 14, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Line of Credit Facility [Line Items]
Interest rate		5.625%		5.625%		5.625%
Unamortized debt issuance costs		$ (7,544,000)		$ (7,544,000)		$ (9,053,000)
Total long-term debt		$ 492,456,000		$ 492,456,000		569,947,000
5.625% Senior Notes due 2025
Line of Credit Facility [Line Items]
Interest rate		5.625%		5.625%
Long-term debt, gross		$ 500,000,000		$ 500,000,000		500,000,000
Principal amount	$ 500,000,000
Proceeds from issuance of debt	$ 489,500,000
Rattler Credit Facility
Line of Credit Facility [Line Items]
Long-term debt, gross		0		0		$ 79,000,000
Revolving credit facility maximum borrowing capacity		600,000,000		600,000,000
Revolving credit facility maximum borrowing capacity, subject to commitments		1,000,000,000		1,000,000,000
Available borrowings capacity		$ 600,000,000		$ 600,000,000
Weighted average interest rate		1.34%	1.46%	1.38%	2.18%

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UNIT-BASED COMPENSATION - Additional Information (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) distributionRight shares	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) distributionRight shares	Sep. 30, 2020 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common units reserved for issuance (in shares) | shares	14,535,791		14,535,791
Unit-based compensation expenses	$ 2.5	$ 2.2	$ 7.3	$ 6.6
Distribution right for each phantom unit | distributionRight	1		1
Partnership Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion of stock, shares converted (in shares) | shares			1
Phantom Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value			$ 8.6
Unrecognized compensation cost related to unvested phantom units	$ 25.4		$ 25.4
Unrecognized compensation cost related to unvested phantom units, period for recognition			2 years 6 months 14 days

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UNIT-BASED COMPENSATION - Phantom Units (Details) - Phantom Share Units (PSUs) - $ / shares	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Phantom Units
Unvested beginning balance (in shares)	2,089,668
Granted (in shares)	238,399
Vested (in shares)	(469,221)
Forfeited (in shares)	(32,100)
Unvested ending balance (in shares)	1,826,746
Weighted Average Grant-Date Fair Value
Unvested beginning balance (in USD Per share)	$ 16.12	$ 17.07
Granted (in USD Per share)	10.99
Vested (in USD Per share)	18.37
Forfeited (in USD Per share)	6.72
Unvested ending balance (in USD Per share)	$ 16.12	$ 17.07

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UNITHOLDERS’ EQUITY AND DISTRIBUTIONS - Additional Information (Details) - USD ($)	3 Months Ended					9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Oct. 31, 2021	Oct. 29, 2021	Oct. 27, 2021	Aug. 02, 2021	Apr. 28, 2021	Feb. 17, 2021	Dec. 31, 2020	Oct. 29, 2020
Limited Partners' Capital Account [Line Items]
Amount of shares repurchased	$ 12,312,000	$ 5,198,000	$ 11,114,000
Change in ownership of consolidated subsidiaries	(320,000)	(535,000)	(196,000)		$ 90,613,000
Limited Partners
Limited Partners' Capital Account [Line Items]
Change in ownership of consolidated subsidiaries	1,160,000			$ 0		$ 3,813,000	$ (329,034,000)
Subsequent Event
Limited Partners' Capital Account [Line Items]
Additional authorized repurchase amount								$ 150,000,000
Common Units | Limited Partners
Limited Partners' Capital Account [Line Items]
Amount of shares repurchased	12,312,000	5,198,000	11,114,000
Change in ownership of consolidated subsidiaries	1,160,000	1,941,000	712,000		(329,034,000)
Non-Controlling Interest
Limited Partners' Capital Account [Line Items]
Change in ownership of consolidated subsidiaries	$ (1,480,000)	$ (2,476,000)	$ (908,000)		$ 419,647,000
Diamondback Energy, Inc. | Rattler Midstream Partners LLC
Limited Partners' Capital Account [Line Items]
Percent of limited partnership interest						73.00%
Member ownership percentage	73.00%					73.00%
Rattler Midstream Partners LLC
Limited Partners' Capital Account [Line Items]
Conversion of stock, shares converted (in shares)						1
Common Units
Limited Partners' Capital Account [Line Items]
Limited partners' capital account, units issued (in shares)	39,960,128					39,960,128								42,356,637
Units outstanding (in shares)	39,960,128					39,960,128								42,356,637
Conversion of stock, shares issued						1
Stock repurchase program, authorized amount															$ 100,000,000
Amount of shares repurchased	$ 12,300,000					$ 28,600,000
Remaining authorized repurchase amount	$ 56,600,000					$ 56,600,000
Partners' capital, cash distribution (in USD per share)											$ 0.25	$ 0.20	$ 0.20
Common Units | Subsequent Event
Limited Partners' Capital Account [Line Items]
Partners' capital, cash distribution (in USD per share)										$ 0.25
Common Units | Diamondback Energy, Inc.
Limited Partners' Capital Account [Line Items]
Units outstanding (in shares)	0					0
Class B Units
Limited Partners' Capital Account [Line Items]
Limited partners' capital account, units issued (in shares)	107,815,152					107,815,152								107,815,152
Units outstanding (in shares)	107,815,152					107,815,152			107,815,152					107,815,152
Conversion of stock, shares converted (in shares)						1
Class B Units | Diamondback Energy, Inc.
Limited Partners' Capital Account [Line Items]
Units outstanding (in shares)	107,815,152					107,815,152
Operating Company Units | Diamondback Energy, Inc.
Limited Partners' Capital Account [Line Items]
Units outstanding (in shares)	107,815,152					107,815,152

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UNITHOLDERS’ EQUITY AND DISTRIBUTIONS - Ownership Interest in Subsidiary Changes (Details) - USD ($) $ in Thousands	3 Months Ended					9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to the Partnership	$ 8,485			$ 9,218		$ 26,945	$ 25,071
Change in ownership of consolidated subsidiaries	(320)	$ (535)	$ (196)		$ 90,613
Limited Partners
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Net income (loss) attributable to the Partnership	8,485			9,218		26,945	25,071
Change in ownership of consolidated subsidiaries	1,160			0		3,813	(329,034)
Change from net income (loss) attributable to the Partnership's unitholders and transfers to non-controlling interest	$ 9,645			$ 9,218		$ 30,758	$ (303,963)

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UNITHOLDERS’ EQUITY AND DISTRIBUTIONS - Schedule of Partnership Cash Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended
	Aug. 02, 2021	Apr. 28, 2021	Feb. 17, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Distribution Made to Limited Partner [Line Items]
Distributions				$ 37,148	$ 29,786	$ 29,866	$ 44,065	$ 43,980	$ 43,979
Common Units
Distribution Made to Limited Partner [Line Items]
Partners' capital, cash distribution (in USD per share)	$ 0.25	$ 0.20	$ 0.20
Common Units | Cash Distribution
Distribution Made to Limited Partner [Line Items]
Distributions	$ 10,154	$ 8,183	$ 8,263
Common Units | Cash Distribution | Diamondback Energy, Inc.
Distribution Made to Limited Partner [Line Items]
Distributions	$ 26,954	$ 21,563	$ 21,563

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EARNINGS PER COMMON UNIT (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income (loss) attributable to Rattler Midstream LP	$ 8,485	$ 9,218	$ 26,945	$ 25,071
Less: net income allocated to participating securities	(458)	(524)	(1,332)	(1,820)
Net income (loss) attributable to common unitholders	$ 8,027	$ 8,694	$ 25,613	$ 23,251
Basic weighted average common units outstanding (in shares)	40,542,000	43,996,000	41,101,000	43,837,000
Potential common units issuable (in shares)	0	0	0	0
Diluted weighted average common units outstanding (in shares)	40,542,000	43,996,000	41,101,000	43,837,000
Net income per common unit, basic (in USD per share)	$ 0.20	$ 0.20	$ 0.62	$ 0.53
Net income per common unit, diluted (in USD per share)	$ 0.20	$ 0.20	$ 0.62	$ 0.53
Phantom units (in shares)	0	0	0	0

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RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Related Party Transaction [Line Items]
Revenue from related parties	$ 87,613	$ 85,846	$ 266,270	$ 280,460
Produced water gathering and disposal
Related Party Transaction [Line Items]
Revenue from related parties	63,202	66,067	194,895	211,353
Sourced water gathering
Related Party Transaction [Line Items]
Revenue from related parties	16,833	11,948	48,105	46,845
Natural gas gathering
Related Party Transaction [Line Items]
Revenue from related parties	5,696	5,076	17,021	14,506
Crude oil gathering
Related Party Transaction [Line Items]
Revenue from related parties	1,835	2,745	6,022	7,730
Surface revenue
Related Party Transaction [Line Items]
Revenue from related parties	$ 47	$ 10	$ 227	$ 26

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INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Provision for (benefit from) income taxes	$ 2,551	$ 2,851	$ 7,761	$ 7,754
Effective tax rate	6.10%	6.80%	6.10%	6.80%

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FAIR VALUE MEASUREMENTS - Assets and Liabilities Not Recorded at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair value of assets and liabilities measured on a recurring and nonrecurring basis
Interest rate	5.625%	5.625%
5.625% Senior Notes due 2025
Fair value of assets and liabilities measured on a recurring and nonrecurring basis
Interest rate	5.625%
Carrying Value | 5.625% Senior Notes due 2025 | Nonrecurring
Fair value of assets and liabilities measured on a recurring and nonrecurring basis
Senior notes due	$ 492,456	$ 490,947
Carrying Value | Rattler Credit Facility | Nonrecurring
Fair value of assets and liabilities measured on a recurring and nonrecurring basis
Revolving credit facility	0	79,000
Fair Value | 5.625% Senior Notes due 2025 | Nonrecurring
Fair value of assets and liabilities measured on a recurring and nonrecurring basis
Senior notes due	522,330	528,125
Fair Value | Rattler Credit Facility | Nonrecurring
Fair value of assets and liabilities measured on a recurring and nonrecurring basis
Revolving credit facility	$ 0	$ 79,000

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COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	Sep. 30, 2021 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Future capital commitments for investments includes for the remainder of 2021	$ 6.0
Contractual obligation	$ 22.7

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SUBSEQUENT EVENTS (Details) $ / shares in Units, a in Thousands, $ in Millions	Nov. 01, 2021 USD ($)	Oct. 19, 2021 USD ($) a facility property pipeline well MMBbls	Oct. 05, 2021 USD ($) MMcf / d property	Oct. 27, 2021 $ / shares	Aug. 02, 2021 $ / shares	Apr. 28, 2021 $ / shares	Feb. 17, 2021 $ / shares
Common Unit
Subsequent Event [Line Items]
Partners' capital, cash distribution (in USD per share) | $ / shares					$ 0.25	$ 0.20	$ 0.20
Subsequent Event | Pecos County Gas Gathering
Subsequent Event [Line Items]
Gross potential consideration	$ 93.0
Consideration due at closing	83.0
Subsequent Event | Pecos County Gas Gathering | Contingent Payment Due in 2023
Subsequent Event [Line Items]
Consideration payment	5.0
Subsequent Event | Pecos County Gas Gathering | Contingent Payment Due in 2024
Subsequent Event [Line Items]
Consideration payment	$ 5.0
Subsequent Event | Dropdown Transaction
Subsequent Event [Line Items]
Price of acquisition		$ 160.0
Asset acquisition, property acquired		$ 160.0
Active saltwater disposal injection wells | well		9
Well water capacity volume | MMBbls		330
Water recycling and storage facilities | facility		7
Fresh water pit | property		20
Area of land | a		4
Produced water gathering pipeline | pipeline		55
Pipeline, Sourced Water Gathering | pipeline		18
Subsequent Event | WTG Joint Venture Acquisition
Subsequent Event [Line Items]
Cash payment to acquire business			$ 104.0
Percentage of interests acquired			25.00%
Subsequent Event | WTG Joint Venture Acquisition | Midland Basin
Subsequent Event [Line Items]
Gas processing Capacity | MMcf / d			925
Subsequent Event | WTG Joint Venture Acquisition | WTG Midstream LLC | Midland Basin
Subsequent Event [Line Items]
Gas processing plants | property			6
Subsequent Event | Common Unit
Subsequent Event [Line Items]
Partners' capital, cash distribution (in USD per share) | $ / shares				$ 0.25