The following discussion and analysis should be read in conjunction with our
unaudited consolidated financial statements and notes thereto presented in this
report as well as our audited consolidated 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 "  Part II. Item 1A. Risk Factors  " and "  Cautionary Statement Regarding
Forward-Looking Statements  ."

Overview



We operate in two operating segments: (i) the upstream segment, which is engaged
in the acquisition, development, exploration and exploitation of unconventional,
onshore oil and natural gas reserves primarily in the Permian Basin in West
Texas and (ii) through our subsidiary, Rattler, the midstream operations
segment, which is focused on ownership, operation, development and acquisition
of midstream infrastructure assets in the Midland and Delaware Basins of the
Permian Basin.

Recent Developments

First Quarter 2021 Acquisitions

On February 26, 2021, we completed the Guidon Acquisition, which included approximately 32,500 net acres in the Northern Midland Basin, in exchange for 10.68 million shares of the Company's common stock and $375 million of cash.



On March 17, 2021, we completed the acquisition of QEP pursuant to the Agreement
and Plan of Merger, dated as of December 20, 2020 (the "Merger Agreement"), by
and among Diamondback, Bohemia Merger Sub, Inc., a Delaware corporation and QEP.
Pursuant to the Merger Agreement, at the effective time of the QEP Merger,
Bohemia Merger Sub, Inc. merged with and into QEP, with QEP continuing as the
surviving corporation and as a wholly owned subsidiary of Diamondback. The
addition of QEP's assets increased our net acreage in the Midland Basin by
approximately 49,000 net acres. Under the terms of the Merger Agreement, we
issued approximately 12.12 million shares of our common stock (valued at a price
of $81.41 per share on the closing date) to the former QEP stockholders, with
the total value of approximately $987 million.

See Note 4- Acquisitions for additional discussion of the Guidon Acquisition and the QEP Merger.

Recent and Pending Divestitures



On May 3, 2021, we signed a definitive agreement to divest all of our Williston
Basin assets acquired in the QEP Merger, consisting of approximately 95,000 net
acres, for a purchase price of approximately $745 million, subject to certain
closing adjustments. This transaction is expected to close in the third quarter
of 2021, subject to continued due diligence and closing conditions. We intend to
use our net proceeds from this transaction toward debt reduction.

On April 28, 2021 and April 29, 2021, we signed definitive agreements to divest
certain non-core Permian assets, including 7,000 net acres of non-core Southern
Midland Basin acreage in Upton county and approximately 1,300 net acres of
non-core, non-operated Delaware Basin assets in Lea county, New Mexico, for a
combined gross purchase price of $87 million, subject to certain closing
adjustments. These transactions are expected to close in the second quarter of
2021, subject to continued due diligence and closing conditions. We intend to
use our net proceeds from these transactions toward debt reduction.

On April 30, 2021, each of Rattler and its joint venture partner Amarillo
Midstream, LLC sold its interest in Amarillo Rattler to EnLink Midstream
Operating, LP for aggregate total gross potential consideration of $75 million,
consisting of $50 million at closing, $10 million upon the first anniversary of
closing and up to $15 million in contingent earn-out payments over a three-year
span based upon the Company's development activity. Net of transaction expenses
and working capital adjustments, Rattler received $24 million at closing, with
an incremental $5 million due in April 2022 and could receive up to $7.5 million
in contingent payments from 2023 to 2025.

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First Quarter 2021 Debt Transactions

On March 24, 2021, we completed a notes offering of our March 2021 Notes
resulting in aggregate net proceeds of $2.18 billion. The net proceeds were
primarily used to fund the repurchase of $1.65 billion in fair value carrying
amount of the QEP Notes that remained outstanding at the effective time of the
QEP Merger for total cash consideration of $1.7 billion, and $368 million
principal amount of 2025 Senior Notes, for total cash consideration of $381
million. These refinancing transactions are expected to result in an estimated
annual interest cost savings of approximately $40 million in addition to an
estimated $60 to $80 million of previously announced expected annual cost
synergies from the QEP Merger.

See Note 9- Debt for additional discussion of our 2021 debt transactions.

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 ongoing
COVID-19 pandemic. However, certain restrictions on conducting business that
were implemented in response to the COVID-19 pandemic have 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 market prices have improved in
response to the increase in demand.

During 2020 and 2021, the posted NYMEX WTI price for crude oil ranged from
$(37.63) to $66.09 per Bbl, and the NYMEX Henry Hub price of natural gas ranged
from $1.48 to $3.35 per MMBtu. On April 12, 2021, the NYMEX WTI price for crude
oil was $59.70 per Bbl and the NYMEX Henry Hub price of natural gas was $2.56
per MMBtu. Commodity prices have historically been volatile and we cannot
predict events which may lead to future fluctuations in these prices.

As a result of the reduction in crude oil demand caused by factors discussed
above, in 2020, we lowered our 2020 capital budgets and production guidance,
however, we have restored curtailed production. Our results of operations may be
further adversely impacted by any government rule, regulation or order that may
impose production limits, as well as pipeline capacity and storage constraints,
in the Permian Basin where we operate.

First Quarter 2021 Operating Highlights

•We recorded net income of $220 million for the first quarter ended March 31, 2021.



•Our average production was 307.4 MBOE/d during the first quarter of 2021 which
includes the effect of approximately four to five days of lost total net
production during February 2021 resulting from the recent winter storms in the
Permian Basin. The Company expects to make up these production losses throughout
the remainder of 2021.

•During the first quarter of 2021, we drilled 41 gross horizontal wells in the Midland Basin and eight gross horizontal wells in the Delaware Basin.

•We turned 67 gross operated horizontal wells (42 in the Midland Basin and 25 in the Delaware Basin) to production and had capital expenditures, excluding acquisitions, of $296 million during the first quarter of 2021.

•The average lateral length for the wells completed during the first quarter of 2021 was 10,331 feet.



•As of March 31, 2021, we had $1.9 billion of availability for future borrowings
under our revolving credit facility and approximately $121 million of cash on
hand.

•Our cash operating costs for the first quarter ended March 31, 2021 were $8.06
per BOE, including lease operating expenses of $3.69 per BOE, cash general and
administrative expenses of $0.54 per BOE and production and ad valorem taxes and
gathering and transportation expenses of $3.83 per BOE.

•On April 29, 2021, our board of directors declared a cash dividend for the
first quarter of 2021 of $0.40 per share of common stock, payable on May 20,
2021 to our stockholders of record at the close of business of May 13, 2021.


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Upstream Segment

In our upstream segment, our activities are primarily directed at the horizontal
development of the Wolfcamp and Spraberry formations in the Midland Basin and
the Wolfcamp and Bone Spring formations in the Delaware Basin. We intend to
continue to develop our reserves and increase production through development
drilling and exploitation and exploration activities on our multi-year inventory
of identified potential drilling locations and through acquisitions that meet
our strategic and financial objectives, targeting oil-weighted reserves. Also,
in our upstream segment, our publicly-traded subsidiary, Viper, is focused on
owning and acquiring mineral interests and royalty interests in oil and natural
gas properties primarily in the Permian Basin and derives royalty income and
lease bonus income from such interests.

As of March 31, 2021, we had approximately 554,594 net acres, which primarily
consisted of approximately 275,113 net acres in the Midland Basin, 151,245 net
acres in the Delaware Basin and 94,610 net acres in the Williston Basin. As
discussed above, we recently entered into definitive agreements to divest (i)
all of our Williston Basin net acres, (ii) 7,000 net acres of non-core Southern
Midland Basin acreage in Upton county and (iii) approximately 1,300 net acres of
non-core, non-operated Delaware Basin assets in Lea county, New Mexico for an
aggregate purchase price of $832 million, subject to certain closing
adjustments. These transactions are expected to close in the second and third
quarters of 2021, subject to continued due diligence and closing conditions.

As of December 31, 2020, we had an estimated 10,413 gross horizontal locations that we believe to be economic at $60 per barrel WTI.

The following table sets forth the total number of operated horizontal wells drilled and completed during the three months ended March 31, 2021:


                              Three Months Ended March 31, 2021
                          Drilled                          Completed(1)
Area              Gross              Net               Gross            Net
Midland Basin      41                40                  42             37
Delaware Basin      8                 7                  25             23
Total              49                47                  67             60


(1)The average lateral length for the wells completed during the first quarter
of 2021 was 10,331 feet. Operated completions during the first quarter of 2021
consisted of 27 Wolfcamp A wells, eight Wolfcamp B wells, ten Lower Spraberry
wells, seven Middle Spraberry wells, six Second Bone Springs wells, four Jo Mill
wells, three Third Bone Springs wells, one Dean well and one Barnett well.

As of March 31, 2021, we operated the following wells:


                                                    As of March 31, 2021
                        Vertical Wells                    Horizontal Wells                   Total
Area               Gross               Net            Gross               Net         Gross           Net
Midland Basin     2,322              2,157           1,685               1,556       4,007          3,713
Delaware Basin       26                 23             616                 576         642            599
Other                 -                  -             397                 345         397            345
Total             2,348              2,180           2,698               2,477       5,046          4,657


As of March 31, 2021, we held interests in 10,763 gross (4,815 net) wells, including wells that we do not operate. During the first quarter of 2021, we acquired interests in 1,671 gross (1,240 net) wells as part of the QEP Merger.



Our development program is focused entirely within the Permian Basin, where we
continue to focus on long-lateral multi-well pad development. Our horizontal
development consists of multiple targeted intervals, primarily within the
Wolfcamp and Spraberry formations in the Midland Basin and the Wolfcamp and Bone
Springs formations in the Delaware Basin.

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Midstream Operations

In our midstream operations segment, Rattler's crude oil infrastructure assets
consist of gathering pipelines and metering facilities, which collectively
gather crude oil for its customers. Rattler's facilities gather crude oil from
horizontal and vertical wells in our ReWard, Spanish Trail, Pecos and Glasscock
areas within the Permian Basin. Rattler's natural gas gathering and compression
system consists of gathering pipelines, compression and metering facilities,
which collectively service the production from our Pecos area assets within the
Permian Basin. Rattler's water sourcing and distribution assets consists of
water wells, hydraulic fracturing pits, pipelines and water treatment
facilities, which collectively gather and distribute water from Permian Basin
aquifers to the drilling and completion sites through buried pipelines and
temporary surface pipelines. Rattler's gathering and disposal system spans
approximately 524 miles and consists of gathering pipelines along with produced
water disposal wells and facilities which collectively gather and dispose of
produced water from operations throughout our Permian Basin acreage.

We have entered into multiple fee-based commercial agreements with Rattler, each
with an initial term ending in 2034, utilizing Rattler's infrastructure assets
or its planned infrastructure assets to provide an array of essential services
critical to our upstream operations in the Delaware and Midland Basins. Our
agreements with Rattler include substantial acreage dedications.

Results of Operations

The following table sets forth selected operating data for the three months ended March 31, 2021 and 2020:


                                                                    Three Months Ended March 31,
                                                                     2021                   2020
Revenues (In millions):
Oil sales                                                      $          944          $        827
Natural gas sales                                                         104                     4
Natural gas liquid sales                                                  124                    52
Total oil, natural gas and natural gas liquid revenues         $        1,172          $        883

Production Data:
Oil (MBbls)                                                            16,578                18,325
Natural gas (MMcf)                                                     34,109                32,120
Natural gas liquids (MBbls)                                             5,405                 5,538
Combined volumes (MBOE)(1)                                             27,668                29,216

Daily oil volumes (BO/d)(2)                                           184,200               201,369
Daily combined volumes (BOE/d)(2)                                     307,422               321,057

Average Prices:
Oil ($ per Bbl)                                                $        56.94          $      45.10
Natural gas ($ per Mcf)                                        $         3.05          $       0.14
Natural gas liquids ($ per Bbl)                                $        22.94          $       9.45
Combined ($ per BOE)                                           $        42.36          $      30.23

Oil, hedged ($ per Bbl)(3)                                     $        46.81          $      49.32
Natural gas, hedged ($ per MMBtu)(3)                           $         2.64          $       0.42
Natural gas liquids, hedged ($ per Bbl)(3)                     $        22.76          $       9.45
Average price, hedged ($ per BOE)(3)                           $        

35.75 $ 33.19




(1)Bbl equivalents are calculated using a conversion rate of six Mcf per one
Bbl.
(2)The volumes presented are based on actual results and are not calculated
using the rounded numbers in the table above.
(3)Hedged prices reflect the effect of our commodity derivative transactions on
our average sales prices and include gains and losses on cash settlements for
matured commodity derivatives, which we do not designate for hedge accounting.
Hedged prices exclude gains or losses resulting from the early settlement of
commodity derivative contracts.
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Production Data

Substantially all of our revenues are generated through the sale of oil, natural gas and natural gas liquids production. The following tables set forth our production data for the three months ended March 31, 2021 and 2020:


                                    Three Months Ended March 31,
                                          2021                  2020
Oil (MBbls)                                           60  %      63  %
Natural gas (MMcf)                                    21  %      18  %
Natural gas liquids (MBbls)                           19  %      19  %
                                                     100  %     100  %



                                                           Three Months Ended March 31, 2021                                     Three Months Ended March 31, 2020
                                             Midland Basin     Delaware Basin     Other(1)        Total            Midland Basin     Delaware Basin     Other(2)        Total
Production Data:
Oil (MBbls)                                       9,840            6,436             302         16,578                10,511            7,760              54         18,325
Natural gas (MMcf)                               18,457           15,055             597         34,109                15,833           16,147             140         32,120
Natural gas liquids (MBbls)                       3,236            2,069             100          5,405                 3,048            2,463              27          5,538
Total (MBoe)                                     16,152           11,014             502         27,668                16,198           12,914             104         29,216

(1)Includes the Eagle Ford Shale, Rockies and High Plains. (2)Includes the Central Basin Platform, Eagle Ford Shale and Rockies.

Comparison of the Three Months Ended March 31, 2021 and 2020



Oil, Natural Gas and Natural Gas Liquids Revenues. Our revenues are a function
of oil, natural gas and natural gas liquids production volumes sold and average
sales prices received for those volumes.

Our oil, natural gas and natural gas liquids revenues for the first quarter of
2021 increased by $289 million, or 33%, to $1,172 million from $883 million
during the first quarter of 2020. The increase in average prices received during
the three months ended March 31, 2021 as compared to the same period in 2020
contributed to $368 million of the total increase. The impact of higher pricing
was partially offset by a 5.3% decrease in combined volumes sold primarily
driven by the recent winter storms in the Permian Basin which caused the loss of
approximately four to five days of total net production during February 2021.
The production declines were slightly offset by additional production
contributed during the first quarter of 2021 from the QEP Merger and Guidon
Acquisition. The Company expects to make up weather related production losses
throughout the remainder of 2021.

Average daily production sold decreased by 13,635 BOE/d to 307,422 BOE/d during
the three months ended March 31, 2021 from 321,057 BOE/d during the three months
ended March 31, 2020.

Lease Operating Expenses. The following table shows lease operating expenses for the three months ended March 31, 2021 and 2020:


                                         Three Months Ended March 31,
                                         2021                          2020
                                 Amount            Per BOE      Amount      Per BOE
                                     (In millions, except per BOE amounts)
Lease operating expenses   $      102             $  3.69      $  127      $  4.35



Lease operating expenses for the three months ended March 31, 2021 as compared
to the three months ended March 31, 2020 decreased by $25 million, or $0.66 per
BOE. The decrease in lease operating expenses was primarily due to declining
power generation costs which were partially offset by additional costs resulting
from production associated with the acquisitions discussed in Note
4-  Acquisitions  .

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Production and Ad Valorem Tax Expense. The following table shows production and
ad valorem tax expense for the three months ended March 31, 2021 and 2020:
                                                                            

Three Months Ended March 31,


                                                                       2021                                  2020
                                                           Amount                 Per BOE          Amount          Per BOE
                                                                       (In millions, except per BOE amounts)
Production taxes                                        $     60                 $  2.17          $   42          $  1.42
Ad valorem taxes                                              15                    0.54              29             1.01
Total production and ad valorem expense                 $     75

$ 2.71 $ 71 $ 2.43



Production taxes as a % of oil, natural gas, and
natural gas liquids revenue                                  5.1    %                                4.8  %



In general, production taxes are directly related to production revenues and are
based upon current year commodity prices. Production taxes as a percentage of
production revenues remained consistent for the three months ended March 31,
2021 compared to the same period in 2020.

Ad valorem taxes are based, among other factors, on property values driven by
prior year commodity prices. Ad valorem taxes for the three months ended March
31, 2021 as compared to the three months ended March 31, 2020 decreased by $14
million primarily due to lower overall valuations resulting from a decrease in
commodity prices between valuation periods.

Gathering and Transportation Expense. The following table shows gathering and transportation expense for the three months ended March 31, 2021 and 2020:


                                                     Three Months Ended March 31,
                                                    2021                           2020
                                             Amount           Per BOE      Amount       Per BOE
                                                 (In millions, except per BOE amounts)
Gathering and transportation expense   $     31              $  1.12      $ 

36 $ 1.23

For the three months ended March 31, 2021, the per BOE decrease for gathering and transportation expenses is primarily attributable to recording minimum volume commitment fees in 2020.

Depreciation, Depletion, Amortization and Accretion. The following table provides the components of our depreciation, depletion, amortization and accretion expense for the three months ended March 31, 2021 and 2020:


                                                                       Three Months Ended March 31,
                                                                         2021                  2020
                                                                    (In millions, except BOE amounts)
Depletion of proved oil and natural gas properties                 $          257          $     392
Depreciation of midstream assets                                               11                 11
Depreciation of other property and equipment                                    3                  4
Asset retirement obligation accretion                                           2                  2
Depreciation, depletion and amortization expense                   $          273          $     409
Oil and natural gas properties depletion rate per BOE              $        

9.29 $ 13.42





The decrease in depletion of proved oil and natural gas properties of $135
million for the three months ended March 31, 2021 as compared to the three
months ended March 31, 2020 resulted largely from a reduction in the average
depletion rate for our oil and natural gas properties in 2021, which stemmed
from a decrease in the net book value of our properties due primarily to the
full cost ceiling impairments recorded in 2020.

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Impairment of Oil and Natural Gas Properties. Pursuant to SEC guidance, we
determined the fair value of the properties acquired in the QEP Merger and
Guidon Acquisition clearly exceeded the related full cost ceiling limitation
beyond a reasonable doubt and received a waiver from the SEC to exclude the
acquired properties from the first quarter 2021 ceiling test calculation. As a
result, no impairment expense was recorded for the three months ended March 31,
2021. The properties acquired in the QEP Merger and Guidon Acquisition had an
unamortized cost at March 31, 2021 of $3.0 billion and $1.1 billion,
respectively. Had we not received the waiver from the SEC, the impairment charge
recorded would have been an additional $1.1 billion for the three months ended
March 31, 2021.

As a result of the sharp decline in commodity prices during 2020, we recorded a
non-cash ceiling test impairment for the three months ended March 31, 2020 of
$1.0 billion, which is included in accumulated depletion, depreciation,
amortization and impairment on our condensed consolidated balance sheet.

Impairment charges affect our results of operations but do not reduce our cash
flow. In addition to commodity prices, our production rates, levels of proved
reserves, future development costs, transfers of unevaluated properties and
other factors will determine our actual ceiling test calculation and impairment
analysis in future periods. If the trailing 12-month commodity prices fall as
compared to the commodity prices used in prior quarters, we may have material
write-downs in subsequent quarters. See Note 6-  Property and Equipment   for
further details regarding factors that impact the impairment of oil and natural
gas properties.

General and Administrative Expenses. The following table shows general and administrative expenses for the three months ended March 31, 2021 and 2020:


                                                           Three Months Ended March 31,
                                                          2021                           2020
                                                   Amount           Per BOE      Amount       Per BOE
                                                       (In millions, except per BOE amounts)
General and administrative expenses          $     15              $  0.54      $    15      $  0.51
Non-cash stock-based compensation                  10                 0.36            9         0.31
Total general and administrative expenses    $     25              $  0.90

$ 24 $ 0.82

Merger and Integration Expense. The following tables shows merger and integration expense for the three months ended March 31, 2021 and 2020:


                                           Three Months Ended March 31,
                                                  2021

2020


                                                   (In millions)
Merger and integration expense   $             75                           

$ -





Total merger and integration expense for the three months ended March 31, 2021
includes $67 million in costs incurred for the QEP Merger and $8 million in
costs incurred for the Guidon Acquisition. The QEP Merger related expenses
primarily consist of $38 million in severance costs and $23 million in banking,
legal and advisory fees, and the Guidon Acquisition related expenses consist
primarily of advisory fees. See Note 4-  Acquisitions   for further details
regarding the QEP Merger and Guidon Acquisition.

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Net Interest Expense. The following table shows the components of net interest
expense for the three months ended March 31, 2021 and 2020:
                                                                      Three 

Months Ended March 31,


                                                                         2021                  2020
                                                                              (In millions)
Revolving credit agreements                                       $             3          $       7
Senior notes                                                                   61                 48
Amortization of debt issuance costs and discounts                               4                  2
Other                                                                           4                  4
Capitalized interest                                                          (14)               (13)
Total                                                                          58                 48
Less: interest income                                                           2                  -
Interest expense, net                                             $            56          $      48



Net interest expense increased by $8 million for the three months ended
March 31, 2021 compared to the same period in 2020. The increase was primarily
due to interest expense related to our May 2020 Notes, Rattler's 5.625% Senior
Notes due 2025, and to a lesser extent, interest expense incurred on the QEP
Notes that remained outstanding following the QEP Merger completed in March 2021
and the newly issued March 2021 Notes, which increase was partially offset by
interest cost savings on the repurchase of $368 million in outstanding principal
of our 2025 Notes in March 2021, and a decrease in borrowings under our
revolving credit agreements. See Note 9-  Deb    t   for further details
regarding outstanding borrowings and interest expense.

Derivative Instruments. The following table shows the net gain (loss) on derivative instruments and the net cash receipts (payments) on settlements of derivative instruments for the three months ended March 31, 2021 and 2020:


                                                                        Three Months Ended March 31,
                                                                          2021                   2020
                                                                               (In millions)
Gain (loss) on derivative instruments, net                         $           (164)         $     542
Net cash received (paid) on settlements(1)                         $        

(102) $ 87

(1)The three months ended March 31, 2021 include cash received on interest rate swap contracts terminated prior to their contractual maturity of $80 million.



We are required to recognize all derivative instruments on the balance sheet as
either assets or liabilities measured at fair value. We have not designated our
derivative instruments as hedges for accounting purposes. As a result, we mark
our derivative instruments to fair value and recognize the cash and non-cash
changes in fair value on derivative instruments in our condensed consolidated
statements of operations under the line item captioned "Gain (loss) on
derivative instruments, net." As part of the QEP Merger, we received by novation
from QEP certain derivative instruments which were included on our balance sheet
as of March 31, 2021.

Provision for (Benefit from) Income Taxes. The following table shows the
provision for (benefit from) income taxes for the three months ended March 31,
2021 and 2020:
                                                                    Three Months Ended March 31,
                                                                       2021                  2020
                                                                            (In millions)
Provision for (benefit from) income taxes                       $           

65 $ 83





The change in our income tax provision for the first quarter of 2021 compared to
the same period in 2020 was primarily due to income tax expense resulting from
recording a valuation allowance on Viper's deferred tax assets for the three
months ended March 31, 2020.

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Liquidity and Capital Resources

Historically, our primary sources of liquidity have been cash flows from operations, proceeds from our public equity offerings, borrowings under our revolving credit facility and proceeds from the issuance of our senior notes. Our primary uses of capital have been for the acquisition, development and exploration of oil and natural gas properties.



As we pursue our business and financial strategy, we regularly consider which
capital resources, including cash flow and equity and debt financings, are
available to meet our future financial obligations, planned capital expenditure
activities and liquidity requirements. Our future ability to grow proved
reserves and production will be highly dependent on the capital resources
available to us. Continued prolonged volatility in the capital, financial and/or
credit markets due to the COVID-19 pandemic, the depressed 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.

Liquidity and Cash Flow

Our cash flows for the three months ended March 31, 2021 and 2020 are presented
below:
                                                                      Three Months Ended March 31,
                                                                        2021                  2020
                                                                             (In millions)
Net cash provided by (used in) operating activities              $           624          $      849
Net cash provided by (used in) investing activities                         (587)               (923)
Net cash provided by (used in) financing activities                           29                 101
Net increase (decrease) in cash                                  $            66          $       27



Operating Activities

Our operating cash flow is sensitive to many variables, the most significant of
which is the volatility of prices for the oil and natural gas we produce. Prices
for these commodities are determined primarily by prevailing market conditions.
Regional and worldwide economic activity, weather and other substantially
variable factors influence market conditions for these products. These factors
are beyond our control and are difficult to predict.

The decrease in operating cash flows for the three months ended March 31, 2021
compared to the same period in 2020 primarily resulted from (i) working capital
changes, primarily due to the timing of collections of our oil and natural gas
sales receivables and recording working capital assets and liabilities acquired
in the QEP Merger during March 2021, (ii) a reduction of $265 million due to
making net cash payments of $178 million on our derivative contracts in the
first quarter of 2021 compared to receiving net cash of $87 million on our
derivative contracts in the first quarter of 2020, and (iii) acquisition costs
of $75 million incurred during the first quarter of 2021 for the QEP Merger and
Guidon Acquisition. These net cash outflows were partially offset by an increase
of $285 million in our total revenues and receipt of a $100 million refund of an
income tax receivable related to the carryback of federal net operating losses
and the accelerated refund of minimum tax credits allowed under the CARES Act in
2020.

Investing Activities

Net cash used in investing activities was $587 million compared to $923 million
during the three months ended March 31, 2021 and 2020, respectively. The
majority of our cash used for investing activities during 2021 was for the
purchase and development of oil and natural gas properties and related assets
including the acquisition of certain leasehold interests as part of the Guidon
Acquisition. The majority of our net cash used in investing activities during
the three months ended March 31, 2020 was incurred for drilling and completion
costs in conjunction with our development program. Our capital expenditures for
each period are discussed further below.

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Capital Expenditure Activities

Our capital expenditures excluding acquisitions and equity method investments (on a cash basis) were as follows for the specified period:



                                                                         Three Months Ended March 31,
                                                                           2021                  2020
                                                                           

(In millions) Drilling, completions and non-operated additions to oil and natural gas properties(1)(2)

                                                $           281          $      690
Infrastructure additions to oil and natural gas properties                        8                  56
Additions to midstream assets                                                     7                  44
Total                                                               $           296          $      790


(1)During the three months ended March 31, 2021, in conjunction with our
development program, we drilled 49 gross (47 net) operated horizontal wells, of
which 41 gross (40 net) wells were in the Midland Basin and eight gross (seven
net) wells were in the Delaware Basin, and turned 67 gross (60 net) operated
horizontal wells to production, of which 42 gross (37 net) wells were in the
Midland Basin and 25 gross (23 net) wells were in the Delaware Basin.
(2)During the three months ended March 31, 2020, in conjunction with our
development program, we drilled 93 gross (85 net) operated horizontal wells, of
which 55 gross (50 net) wells were in the Midland Basin and 38 gross (35 net)
wells were in the Delaware Basin, and turned 80 gross (72 net) operated
horizontal wells to production, of which 46 gross (42 net) wells were in the
Delaware Basin and 34 gross (30 net) wells were in the Midland Basin.

Financing Activities



Net cash provided by financing activities for the three months ended March 31,
2021 and 2020 was $29 million and $101 million, respectively. During the three
months ended March 31, 2021, the amount provided by financing activities was
primarily attributable to $2.2 billion in proceeds from the March 2021 Notes and
$76 million in proceeds that relate primarily to the early settlement of
interest rate swaps that contained an other-than-insignificant financing
element. These net increases in cash flows from financing activities were
partially offset by $1.9 billion paid for the repurchase of a portion of the QEP
Notes and 2025 Senior Notes, as well as $166 million of additional premiums paid
in connection with the repurchases, $68 million of dividends paid to
stockholders, $24 million of unit repurchases as part of the Viper and Rattler
unit repurchase programs and $23 million of repayments under our credit
facilities, net of borrowings.

The 2020 amount provided by financing activities was primarily attributable to
$290 million of borrowings, net of repayments under our credit facilities and
$16 million in proceeds from joint ventures, partially offset by $98 million of
share repurchases as part of our previous stock repurchase program, $59 million
of dividends to stockholders, $43 million of distributions to non-controlling
interest and $5 million of cash paid for tax withholding on vested equity
awards.

Indebtedness



At March 31, 2021, our debt, including the debt of Viper and Rattler, consists
of approximately $7.5 billion in aggregate outstanding principal amount of
senior notes (including $191 million due in 2021), $163 million in aggregate
outstanding borrowings under revolving credit facilities and $75 million in
outstanding amounts due under our DrillCo Agreement. Our revolving credit
facilities and significant changes in our outstanding indebtedness during the
three months ended March 31, 2021 are discussed further below. See Note
9-  Debt   for additional discussion of our outstanding debt at March 31, 2021.

Second Amended and Restated Credit Facility



As of March 31, 2021, the maximum credit amount available under our credit
agreement was $2 billion, with $52 million in outstanding borrowings and $1.9
billion available for future borrowings. As of March 31, 2021, there was an
aggregate of $3 million in letters of credit outstanding under our credit
agreement. The weighted average interest rate on borrowings under the credit
facility was 1.65% for the three months ended March 31, 2021.

As of March 31, 2021, we were in compliance with all financial maintenance covenants under the credit agreement.


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March 2021 Notes Offering

On March 24, 2021, we issued $650 million of our 2023 Notes, $900 million of our
2031 Notes and $650 million of our 2051 Notes and received proceeds of $2.18
billion, net of $24 million in debt issuance costs and discounts. The net
proceeds were primarily used to fund the repurchase of other senior notes
outstanding as discussed further below. Interest on the March 2021 Notes is
payable semi-annually on March 24 and September 24, beginning on September 24,
2021.

QEP Notes and Repurchases of Notes

On March 17, 2021, in conjunction with the QEP Merger discussed in Note 4- Acquisitions , QEP's outstanding debt had fair values consisting of $478 million of the QEP 2022 Notes, $673 million of the QEP 2023 Notes, and $558 million of the QEP 2026 Notes.



Subsequent to the QEP Merger, in March 2021, we repurchased pursuant to tender
offers commenced by us approximately $1.65 billion in fair value carrying amount
of the QEP Notes for total cash consideration of $1.7 billion, including
redemption and early premium fees, which resulted in a loss on extinguishment of
debt during the three months ended March 31, 2021 of approximately $47 million.
The aggregate fair value of the QEP Notes repurchased consisted of (i) $453
million, or 94.65%, of the outstanding fair value carrying amount of the QEP
2022 Notes, (ii) $663 million, or 98.43%, of the outstanding fair value carrying
amount of the QEP 2023 Notes, and (iii) $538 million, or 96.35%, of the
outstanding fair value carrying amount of the QEP 2026 Notes.

In March 2021, we also repurchased an aggregate of $368 million principal amount
of our 5.375% 2025 Senior Notes, representing approximately 45.97% of the
outstanding 2025 Senior Notes, for total cash consideration of $381 million,
including redemption and early premium fees, which resulted in a loss on
extinguishment of debt during the three months ended March 31, 2021 of $14
million.

We funded the repurchases of the QEP Notes and 2025 Senior Notes with the proceeds from the March 2021 Notes offering discussed above.



In connection with the tender offers to repurchase the QEP Notes discussed
above, we also solicited consents from holders of the QEP Notes to amend the
indenture for the QEP Notes to, among other things, eliminate substantially all
of the restrictive covenants and related provisions and certain events of
default contained in the QEP indenture under which the QEP Notes were issued. We
received the requisite number of consents and, on March 23, 2021, entered into a
supplemental indenture relating to the QEP Notes adopting these amendments.

Viper's Credit Agreement



The Viper credit agreement, as amended to date, or the Viper credit agreement,
provides for a revolving credit facility in the maximum credit amount of $2
billion, with a borrowing base of $580 million as of March 31, 2021 based on
Viper LLC's oil and natural gas reserves and other factors (the "borrowing
base"). The borrowing base is scheduled to be redetermined semi-annually in May
and November. As of March 31, 2021, Viper LLC had $57 million of outstanding
borrowings and $523 million available for future borrowings under the Viper
credit agreement. The weighted average interest rate on borrowings under the
Viper credit agreement was 1.88% for the three months ended March 31, 2021. The
Viper credit agreement matures on November 1, 2022.

As of March 31, 2021, Viper LLC was in compliance with all financial maintenance covenants under the Viper credit agreement.


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Rattler's Credit Agreement

The Rattler credit agreement, as amended to date, or the Rattler credit
agreement, provides for a revolving credit facility in the maximum credit amount
of $600 million, which is expandable to $1 billion upon Rattler's election,
subject to obtaining additional lender commitments and satisfaction of customary
conditions. As of March 31, 2021, Rattler LLC had $54 million of outstanding
borrowings and $546 million available for future borrowings under the Rattler
credit agreement. The weighted average interest rate on borrowings under the
Rattler credit agreement was 1.40% for the three months ended March 31, 2021.
The Rattler credit agreement matures on May 28, 2024.

As of March 31, 2021, Rattler LLC was in compliance with all financial maintenance covenants under the Rattler credit agreement.

Capital Requirements and Sources of Liquidity



Our board of directors initially approved a 2021 capital budget for drilling and
completion, midstream and infrastructure of approximately $1.4 billion to $1.6
billion. We have updated our 2021 capital budget to approximately $1.6 billion
to $1.75 billion to give effect to the QEP Merger, representing an increase of
16% over our original 2021 capital budget. We estimate that, of these
expenditures, approximately:

•$1.5 billion to $1.6 billion will be spent on drilling and completing 275 to
285 gross (250 to 259 net) horizontal wells across our operated leasehold
acreage in the Northern Midland and Southern Delaware Basins, with an average
lateral length of approximately 10,300 feet;

•$60 million to $80 million will be spent on midstream infrastructure, excluding joint venture investments; and

•$80 million to $90 million will be spent on infrastructure and other expenditures, excluding the cost of any leasehold and mineral interest acquisitions.

We do not have a specific acquisition budget since the timing and size of acquisitions cannot be accurately forecasted.

During the first quarter of 2021, we spent $273 million on drilling and completion, $7 million on midstream, $8 million on non-operated properties and $8 million on infrastructure, for total capital expenditures, excluding acquisitions, of $296 million.



The amount and timing of our capital expenditures are largely discretionary and
within our control. We could choose to defer a portion of these planned capital
expenditures depending on a variety of factors, including but not limited to the
success of our drilling activities, prevailing and anticipated prices for oil
and natural gas, the availability of necessary equipment, infrastructure and
capital, the receipt and timing of required regulatory permits and approvals,
seasonal conditions, drilling and acquisition costs and the level of
participation by other interest owners. We are currently operating 11 drilling
rigs and three completion crews. We currently continue to execute on our
strategy to hold oil production flat while using cash flow from operations to
reduce debt, strengthen our balance sheet and return capital to our
stockholders. We will continue monitoring commodity prices and overall market
conditions and can adjust our rig cadence up or down in response to changes in
commodity prices and overall market conditions.

Based upon current oil and natural gas prices and production expectations for
2021, we believe that our cash flow from operations, cash on hand and borrowings
under our revolving credit facility will be sufficient to fund our operations
through the 12-month period following the filing of this report. However, future
cash flows are subject to a number of variables, including the level of oil and
natural gas production and prices, and significant additional capital
expenditures will be required to more fully develop our properties. Further, our
2021 capital expenditure budget does not allocate any funds for leasehold
interest and property acquisitions.

We monitor and adjust our projected capital expenditures in response to the
results of our drilling activities, changes in prices, availability of
financing, drilling and acquisition costs, industry conditions, the timing of
regulatory approvals, the availability of rigs, contractual obligations,
internally generated cash flow and other factors both within and outside our
control. If we require additional capital, we may seek such capital through
traditional reserve base borrowings, joint venture partnerships, production
payment financing, asset sales, offerings of debt and/or equity securities or
other means. We cannot assure you that the needed capital will be available on
acceptable terms or at all. If we are unable to obtain funds when needed or on
acceptable terms, we may be required to curtail our drilling programs, which
could result in a loss of acreage through lease expirations. In addition, we may
not be able to complete acquisitions that may be favorable to us or finance the
capital
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expenditures necessary to replace our reserves. If there is a decline in
commodity prices, our revenues, cash flows, results of operations, liquidity and
reserves may be materially and adversely affected.

Guarantor Financial Information



As of March 31, 2021, Diamondback O&G LLC is the sole guarantor under the
indentures governing the December 2019 Notes, the May 2020 Notes, the 2025
Senior Notes and the March 2021 Notes.
Guarantees are "full and unconditional," as that term is used in Regulation S-X,
Rule 3-10(b)(3), except that such guarantees will be released or terminated in
certain circumstances set forth in the December 2019 Notes Indenture and the
2025 Indenture, such as, with certain exceptions, (1) in the event Diamondback
O&G LLC (or all or substantially all of its assets) is sold or disposed of, (2)
in the event Diamondback O&G LLC ceases to be a guarantor of or otherwise be an
obligor under certain other indebtedness, and (3) in connection with any
covenant defeasance, legal defeasance or satisfaction and discharge of the
relevant indenture.
Diamondback O&G LLC's guarantees of the December 2019 Notes, the May 2020 Notes,
the 2025 Senior Notes and the March 2021 Notes are senior unsecured obligations
and rank senior in right of payment to any of its future subordinated
indebtedness, equal in right of payment with all of its existing and future
senior indebtedness, including its obligations under its revolving credit
facility, and effectively subordinated to any of its existing and future secured
indebtedness, to the extent of the value of the collateral securing such
indebtedness.
The rights of holders of the Senior Notes against Diamondback O&G LLC may be
limited under the U.S. Bankruptcy Code or state fraudulent transfer or
conveyance law. Each guarantee contains a provision intended to limit
Diamondback O&G LLC's liability to the maximum amount that it could incur
without causing the incurrence of obligations under its guarantee to be a
fraudulent conveyance. However, there can be no assurance as to what standard a
court will apply in making a determination of the maximum liability of
Diamondback O&G LLC. Moreover, this provision may not be effective to protect
the guarantee from being voided under fraudulent conveyance laws. There is a
possibility that the entire guarantee may be set aside, in which case the entire
liability may be extinguished.
The following tables present summarized financial information for Diamondback
Energy, Inc., as the parent, and Diamondback O&G LLC, as the guarantor
subsidiary, on a combined basis after elimination of (i) intercompany
transactions and balances between the parent and the guarantor subsidiary and
(ii) equity in earnings from and investments in any subsidiary that is a
non-guarantor. The information is presented in accordance with the requirements
of Rule 13-01 under the SEC's Regulation S-X. The financial information may not
necessarily be indicative of results of operations or financial position had the
guarantor subsidiary operated as an independent entity.
                                                            March 31, 2021           December 31, 2020
Summarized Balance Sheets:                                                 (In millions)
Assets:
Current assets                                             $          302          $              308

Property and equipment, net                                $        8,108          $            6,934
Other noncurrent assets                                    $           10          $                6
Liabilities:
Current liabilities                                        $          769          $              355

Intercompany accounts payable, non-guarantor subsidiary $ 408

        $              335
Long-term debt                                             $        6,132          $            4,293
Other noncurrent liabilities                               $          916          $              886



                                             Three Months Ended March 31, 2021
     Summarized Statement of Operations:               (In millions)
     Revenues                               $                             

650


     Income (loss) from operations          $                             

328
     Net income (loss)                      $                               85



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Contractual Obligations

In addition to the changes in debt discussed in "  -    Indebtedness  " above
and in Note 9-  Deb  t included in the notes to the condensed consolidated
financial statements included elsewhere in this report, we acquired certain
contractual obligations during the three months ended March 31, 2021 in
conjunction with the QEP Merger including an aggregate of approximately $68
million in various transportation, gathering and purchase commitments. There
were no other significant changes in our contractual obligations from those
disclosed in our   Annual Report on Form 10-K   for the year ended December 31,
2020.

Critical Accounting Policies and Estimates

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 had no material off-balance sheet arrangements as of March 31, 2021. Please
read Note 15-  Com    mitments and Contingencies   included in the notes to the
condensed consolidated financial statements included elsewhere in this report,
for a discussion of our commitments and contingencies, which are not recognized
in the balance sheets under GAAP.

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