ࡱ>  l \pThe Free Software Foundation B=PF0*8X@"1 Helvetica1Courier1 Courier New1 Courier New1 Helvetica$#,##0_);($#,##0)$#,##0_);[Red]($#,##0)$#,##0.00_);($#,##0.00)$#,##0.00_);[Red]($#,##0.00)-**_($* #,##0_);_($* (#,##0);_($* "-"_);_(@_)*)'_(* #,##0_);_(* (#,##0);_(* "-"_);_(@_)5,2_($* #,##0.00_);_($* (#,##0.00);_($* "-"??_);_(@_)2+/_(* #,##0.00_);_(* (#,##0.00);_(* "-"??_);_(@_)2$#,##0.00;[Red]$#,##0.003$#,##0.00;[Red]($#,##0.00)4$#,##0;[Red]($#,##00)50.00%;[Red](0.00%)6 0%;[Red](0%)7#,##0.00;[Red](#,##0.00)8#,##0;[Red](#,##0)                + ) , *   Ј ~~ ؈ ~~#؈ ~~ ؈ ~~8#܈ ~~<#܈ ~~4#܈ ~~3#܈ ~~7#܈ ~~83ffff̙̙3f3fff3f3f33333f33&4FORM 10Q For the quarterly periVYes No %TABLE OF CONTENTS=Balance SheetUBalance Sheet (1)KoIncome Statement&~CONSOLIDATED STATEMENT OF EQUIT Cash Flows&xNOTE C Acquisitions and DivestiMarch 31 2017Unaudited6March 31 2017Un (1)MMarch 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)1March 31 2017Un (4)-LMarch 31 2017Un (5)RbMarch 31 2017Un (6)\wMarch 31 2017Un (7)rMarch 31 2017Un (8)NOTE F Exploratory Costs'NOTE F Exploratory (1) Stockbased compensation &7NOTE I Asset Retirement Obligat&ZNOTE K Interest and Other IncomNOTE L Other Expense@NOTE M Income Taxes&Operations and Drilling Highlig# Operations and Drilling (1)#+Operations and Drilling (2)#+Operations and Drilling (3)&;PIONEER NATURAL RESOURCES COMPA%HPIONEER NATURAL RESOURCES (1)%UPIONEER NATURAL RESOURCES (2)%cPIONEER NATURAL RESOURCES (3)%qPIONEER NATURAL RESOURCES (4)%}PIONEER NATURAL RESOURCES (5)%+PIONEER NATURAL RESOURCES (6)&Item 3 Quantitative and Qualita%gPIONEER NATURAL RESOURCES (7)%CPIONEER NATURAL RESOURCES (8)&Purchases of Equity Securities IExhibits3Exhibit Index&/T1012 Confidential Information a^Peer Companiesr EXHIBIT 121Mine Safety Disclosure l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??. Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } 2} $ }      $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017kc______________________________FORM 10-Q ______________________________For the quarterly period ende    Delaware   75-2702753' (State or other jurisdiction of  (I.R.S. Employer& incorporation or organization)  Identification No.)2*5205 N. O'Connor Blvd., Suite 200, Irving,~ ~Texas0((Address of principal executive offices) (Zip Code)$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/0+7+Z6*=PF0*8X> @ l  L% dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly periTABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } U} $ } 8} $ } } $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017Yes No        Large accelerated filer    Accelerated filer       Non-accelerated filer 7 /o (Do not check if a smaller reporting company) ! Smaller reporting company  Emerging growth company$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/,E||pdd_=PF0*8X> @ l  B3:<= dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No Balance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } y } :}  B    $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017TABLE OF CONTENTS      Page7 /Cautionary Statement Concerning Forward-Looking~   Statements4,Definitions of Certain Terms and Conventions~  Used Herein%PART I. FINANCIAL INFORMATIONItem 1.Financial Statements/'Consolidated Balance Sheets as of March~ &31, 2017 and December 31, 2016-%Consolidated Statements of Operations~ 1)for the three months ended March 31, 2017and 20160(Consolidated Statement of Equity for the~ ")!three months ended March 31, 2017-%Consolidated Statements of Cash Flows~ &Dpl}qeY5P9-}0J* !"#$%&'()*+,-./0123456789:;<=>? 1 )for the three months ended March 31, 2017!!and 2016"""#2#*Notes to Consolidated Financial Statements~ #*$$$%Item 2.,%$Management's Discussion and Analysis~ %^&8&0of Financial Condition and Results of Operations'''(Item 3.0((Quantitative and Qualitative Disclosures~ ())About Market Risk***+Item 4.+Controls and Procedures~ +,"-PART II. OTHER INFORMATION.../Item 1./Legal Proceedings~ /0001Item 1A.1 Risk Factors~ 12223Item 2./3'Unregistered Sales of Equity Securities~ 344and Use of Proceeds5556Item 4.6Mine Safety Disclosures~ 67778Item 6.8Exhibits~ 899: Signatures~ :;;<Exhibit Index~ <=>$?____________________________D-l{+nJdX2rNgC@A1@)Created by Morningstar Document Research.0A(http://documentresearch.morningstar.com/=PF0*8X> @Z AA@@??<<::--   l  ,EO T dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } U5} $ ,                                 $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017Balance Sheet             March 31,   December 31,  ~  ~     (Unaudited)  ASSETSCurrent assets:!Cash and cash equivalents~ ^ ~ zShort-term investments~ *~ Accounts receivable: Trade, net~ ~ Due from affiliates~ ~ Income taxes receivable~ ~  Inventories~ "~  Derivatives~ &~ :Other~ r~ ^Total current assets~ -~ 3/'Property, plant and equipment, at cost:4,Oil and gas properties, using the successful%efforts method of accounting:Proved properties~ r%~ "Unproved properties~ ~ +#Accumulated depletion, depreciation~ zz~ and amortizationD lui]`K+Q._e ! " # $ % & ' ( ) * + + #Total property, plant and equipment ~   ~ f !Long-term investments!~ !!!~ !!"Goodwill"~ "B""~ "B")#!Other property and equipment, net#~ ###~ ##$ Derivatives$~ $&$$$$%Other assets, net%~ %%%~ %%&&~ &&&~ &.&'($)____________________________1*)Created by Morningstar Document Research.0+(http://documentresearch.morningstar.com/|?u=PF0*8X> @r.++**))&&&&%%%%$$####""""!!!!        l  0$$~ $$8%0Total equity attributable to common stockholders%~ %%%~ %%0&(Noncontrolling interests in consolidated&~ &&&~ &&' subsidiaries( Total equity(~ (((~ ((%)Commitments and contingencies))))))**~ ***~ *.*+,$-____________________________1.)Created by Morningstar Document Research.0/(http://documentresearch.morningstar.com/$,H@(S=PF0*8X> @r.//..--****((((&&&&%%%%$$$$!!!!        l  1[ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } I;} $ 1                                 $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017Income Statement            Three Months Ended    March 31,  ~  ~ "Revenues and other income: Oil and gas~  ~ f&Sales of purchased oil and gas~ ~ ~Interest and other~ 6~ "Derivative gains, net~ ^~ *"Gain on disposition of assets, net~ .~  ~ ~  Costs and expenses:Oil and gas production~ 6~ r'Production and ad valorem taxes~ ~ v0(Depletion, depreciation and amortization~ F~ Purchased oil and gas~ ~ ,$Impairment of oil and gas properties~ v~ $Exploration and abandonments~ ~ "General and administrative~ R~ *1)Accretion of discount on asset retirement~ ~  obligationsInterest~ ~ Other~ ~ ^D l~rfZKEs$?RboX ! " # $ % & ' ( ) * + , - . / 0   ~   ~   !Loss before income taxes!~ !!!~ !!"Income tax benefit"~ "~""~ "6"4#,Net loss attributable to common stockholders#~ #Z##~ ##$$$$$9%1Basic and diluted net loss per share attributable%%п%%%ffffff%&to common stockholders,'$Weighted average shares outstanding:''''(Basic(~ (((~ (()Diluted)~ )))~ ))*****$+Dividends declared per share++{Gz?+++{Gz?+,-$.____________________________1/)Created by Morningstar Document Research.00(http://documentresearch.morningstar.com/&v@8J}[?{oG=PF0*8X> @700//..++++))))((((%%%%####""""!!!!       l  ] dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } a/} $ } } $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017( CONSOLIDATED STATEMENT OF EQUITY                                2 *Equity Attributable To Common Stockholders       Shares  Common   Additional  Treasury  Retained  Noncontrolling   Total Equity    Outstanding  Stock  Paid-in  Stock  Earnings   Interests Capital(in thousands)  'Balance as of December 31, 2016~ [ ~  ~    ~ ~ ~ ~ ,$Dividends declared ($0.04 per share)   ~ ~ #Purchases of treasury stock~    ~ r~ rCompensation costs:  "Vested compensation awards~    /'Compensation costs included in net loss~  Z  ~ ZNet loss   ~ Z~ Z$Balance as of March 31, 2017~ a ~  ~  J  ~  ~ >~ ~ $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/<eznbVJdp(f1th\4=PF0*8X> @:'                l  B22  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } U5} $ B                                 $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017 Cash Flows            Three Months Ended    March 31,  ~  ~ -%Cash flows from operating activities:Net loss~ Z~ 0(Adjustments to reconcile net loss to net.&cash provided by operating activities:0(Depletion, depreciation and amortization~ F~ ,$Impairment of oil and gas properties~ v~ 2*Impairment of inventory and other property~ and equipment1)Exploration expenses, including dry holes~ *~ Deferred income taxes~ ~ *"Gain on disposition of assets, net~ ~ 1)Accretion of discount on asset retirement~ ~  obligationsInterest expense~ ~ #Derivative related activity~ ~ 0(Amortization of stock-based compensation~ Z~ VOther~ f~ F3+Change in operating assets and liabilities:Accounts receivable~ r~ D lxl`Q,z~ew|e  ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ?  Income taxes receivable    ~  ! Inventories!~ !!!!!" Investments"~ """""#Other current assets#~ ###~ ##$Accounts payable$~ $$$~ $^$%Interest payable%~ %%%~ %%!&Other current liabilities&~ &>&&~ &&1')Net cash provided by operating activities'~ '''~ ''-(%Cash flows from investing activities:((((0)(Proceeds from disposition of assets, net)~ ):))~ ))* of cash sold!+Proceeds from investments+~ +*++++,Purchase of investments,~ ,,,~ ,,+-#Additions to oil and gas properties-~ ->--~ --4.,Additions to other assets and other property.~ ...~ ../and equipment, net-0%Net cash used in investing activities0~ 0Z00~ 0&0-1%Cash flows from financing activities:1111,2$Principal payments on long-term debt2~ 2n2222/3'Proceeds from issuance of common stock,3333~ 334net of issuance costs#5Purchases of treasury stock5~ 5r55~ 5506(Net cash provided by (used in) financing6~ 666~ 667 activities08(Net increase (decrease) in cash and cash8~ 888~ 8v89 equivalents/:'Cash and cash equivalents, beginning of:~ :z::~ ::;period0<(Cash and cash equivalents, end of period<~ <^ <<~ <2<=>$?____________________________Dl2e$B;Q2WF0@ A 1@)Created by Morningstar Document Research.0A(http://documentresearch.morningstar.com/=PF0*8X> @"DAA@@??<<<<::::88886666555533220000....----,,,,++))))''''&&&&%%%%$$$$####""!!      l  V dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash FlowsMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } I"} $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017-%NOTE C. Acquisitions and Divestitures      Assets acquired:   Proved properties ~ >  Unproved properties ~ n $Other property and equipment~ Liabilities assumed:$Asset retirement obligations~ Other liabilities~ Net assets acquired~ $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2ui]QE My6=PF0*8X> @J    l  ! dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } a/} $ !    $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!March 31, 2017(Unaudited)                   0 (Fair Value Measurement at March 31, 2017     Using   Quoted Prices   Significant   Significant $ Fair Value at March 31, 2017 in ActiveOther   Unobservable Markets for Observable  Inputs IdenticalInputs   (Level 3)Assets (Level 2) (Level 1)(in millions)Assets:  Commodity derivatives~ ~ 2 ~   ~ 2!Interest rate derivatives~    ~ )!Deferred compensation plan assets~ Z   ~ Z Total assets~ Z~ J   ~  Liabilities:  Commodity derivatives~ .   ~ .Total liabilities~ .   ~ ./'Total recurring fair value measurements~ Z~  ~   ~ v$____________________________1)Created by Morningstar Document Research.Dlui]Q!Mp[/v)^RF 0 (http://documentresearch.morningstar.com/H=PF0*8X> @J)           l  ^ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } } $ } } $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!March 31, 2017(Unaudited)                           # Management's Price Outlooks   Impairment Date   Fair Value  Fair Value Adjustment  Oil  Gas Raton   March 2017 ~   ~    33333J@  ~  West Panhandle March 2016~ ~    (\H@Q @$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/*hui]Qm._wkC=PF0*8X> @          l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } -} $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!March 31, 2017(Unaudited)                    March 31, 2017  December 31, 2016   Carrying  Fair  Carrying  Fair   Value  Value  Value  Value(in millions)-%Commercial paper, corporate bonds and~ ~  ~   ~ time deposits)!Current portion of long-term debt~ ~  ~   ~ Long-term debt~ *~ F. ~  * ~ 2.$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2ui]Q*&,N\=PF0*8X> @            l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } *} $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017Balance Sheet                        March 31, 2017+ #Consolidated Balance Sheet Location  Cash  Commercial Paper  Corporate Bonds  Time  Total               Deposits(in millions)!Cash and cash equivalents~ 6 ~ * ~   ~ ~ ^ Short-term investments~  ~    ~ Z~ *Long-term investments ~   ~ ~ 6 ~ F ~  V ~ Z~ &%$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2j ui]a/\o =PF0*8X> @           l  . dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } -} $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!March 31, 2017(Unaudited)                     ~   Year Ending December 31,  Second Quarter  Third Quarter  Fourth Quarter ~  ~  Collar contracts:          Volume (Bbl)~ ]~ ]~ ]  Price per Bbl:  CeilingQ@Q@ Q@  ~ ~ Floor~ ~ ~    ~ ~ -%Collar contracts with short puts (a):   Volume (Bbl)~ ~ ~  u   ~ 8Price per Bbl:  CeilingQN@p= O@ (\O@  )\HP@~ Floor{G:H@HzH@ )\H@  ~ ~  Short put9D@)\D@ (\D@  ~ ~ &Rollfactor swap contracts (b):   Volume (Bbl)~ 8~ 8~  8  NYMEX roll price{GzԿ{GzԿ {GzԿ  ~ ~ $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/BXui]Qar# lIzKqeY1=PF0*8X> @2               l  #IJ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } a/} $ #    $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!March 31, 2017(Unaudited)                     ~   Year Ending December 31,  Second Quarter  Third Quarter  Fourth Quarter ~  ~ " Butane swap contracts (a):          Volume (Bbl)~ B~ B   Price per Bbl:GznA@GznA@~    ~ ~ /'Butane collar contracts with short puts   (b): Volume (Bbl)~ B~ B   Price per Bbl:  Ceiling(\B@(\B@~    ~ ~ Floor@=@@=@~    ~ ~  Short putffffff7@ffffff7@~    ~ ~ $Ethane collar contracts (c):   Volume (Bbl)~ .~ .~  .  Price per Bbl:  Ceiling)\'@)\'@ )\'@  ~ ~ Floor\(\!@\(\!@ \(\!@  ~ ~ ( Ethane basis swap contracts (d):  Volume (MMBtu)~ "l~ "l~  "l  ~ "l~ "l$Price differential ($/MMBtu)?? ?  ??Dlui]QarHOT7h !"$ ____________________________1!)Created by Morningstar Document Research.0"(http://documentresearch.morningstar.com/ (=PF0*8X> @9""!!                 l  q` dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } *} $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!March 31, 2017(Unaudited)                     ~   Year Ending December 31,  Second Quarter  Third Quarter  Fourth Quarter ~  ~ ) !Collar contracts with short puts:         Volume (MMBtu)~ z~ B~ O  ~ Price per MMBtu:  Ceiling{Gz @(\ @  @  {Gz @~ Floor@@ Gz@  HzG@~  Short put(\@(\@ (\@  (\@~ Basis swap contracts:  +#Mid-Continent index swap volume (a)~ "~ "~  "  $Price differential ($/MMBtu){GzԿ{GzԿ {GzԿ  ~ ~ +#Permian Basin index swap volume (b)~  j  ~ $Price differential ($/MMBtu)~ ~  333333?  333333?~ $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/<ui]Qar{=PF0*8X> @b,               l   u dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } !} $ } } $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!March 31, 2017(Unaudited)               / 'Fair Value of Derivative Instruments as of March 31, 2017 Type   Consolidated  Fair 0 (Gross Amounts Offset in the Consolidated 4 ,Net Fair Value Presented in the ConsolidatedBalance SheetValueBalance Sheet  Balance SheetLocation(in millions)-%Derivatives not designated as hedging   instrumentsAsset Derivatives:  #Commodity price derivativesDerivatives - current~ .~   ~  !Interest rate derivativesDerivatives - current~ ~   ~  #Commodity price derivatives Derivatives - noncurrent~ &~   ~  & ~  JLiability Derivatives:  #Commodity price derivativesDerivatives - current~ F~   ~  &#Commodity price derivatives Derivatives - noncurrent~  ~   ~    ~  .$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/D lui]QjMylv#?y6*=PF0*8X> @ !                   l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } !} $ } } $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!March 31, 2017(Unaudited)               / 'Fair Value of Derivative Instruments as of December 31, 2016 Type   Consolidated  Fair 0 (Gross Amounts Offset in the Consolidated 4 ,Net Fair Value Presented in the ConsolidatedBalance SheetValueBalance Sheet  Balance SheetLocation(in millions)-%Derivatives not designated as hedging   instrumentsAsset Derivatives:  #Commodity price derivativesDerivatives - current~ ~   ~  "!Interest rate derivativesDerivatives - current~ ~   ~   ~  :Liability Derivatives:  #Commodity price derivativesDerivatives - current~ ~   ~  6#Commodity price derivatives Derivatives - noncurrent~ ~   ~   ~  R$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/B Xui]QjJviso?v=PF0*8X> @                 l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } y#} $ } a/}  $                         $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!March 31, 2017(Unaudited)                % Derivatives Not Designated as / 'Location of Gain / (Loss) Recognized in  Three Months Ended      March 31, Hedging InstrumentsEarnings on Derivatives~ ~ (in millions)#Commodity price derivativesDerivative gains, net~ ^~  !Interest rate derivativesDerivative gains, net~  Total~ ^~  $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2 ui]Q7NUI==PF0*8X> @r          l  Z dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } 6} $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!NOTE F. Exploratory Costs     ) !Three Months Ended March 31, 2017  (in millions). &Beginning capitalized exploratory well~  costs3+Additions to exploratory well costs pending~ Z,$the determination of proved reserves-%Reclassification due to determination~ of proved reserves5-Exploratory well costs charged to exploration~ and abandonment expense1)Ending capitalized exploratory well costs~ $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/8ui]Q!wf|)w=PF0*8X> @R     l  ϳ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsStockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } U5} $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017!NOTE F. Exploratory Costs          March 31, 2017  December 31, 2016 ) !(in millions, except well counts)/ 'Capitalized exploratory well costs that   have been suspended:One year or less~ n~ More than one year~ V~ ~ ~ 4,Number of wells or projects with exploratory~ 2~ /'well costs that have been suspended for&a period greater than one year$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2Fui]Qi8tA=PF0*8X> @r    l  X dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)!NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } *} $ } y} $ } } $ } } $ } } $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017 Stock-based compensation                 Restricted   Restricted   Performance  Stock    Stock Equity  Stock Liability  Units  Options   Awards  Awards+#Outstanding as of December 31, 2016~ A~ ~    ~ J  Awards granted~ T~ ~     Awards forfeited~ ~     Awards vested~ ~ Z&    ( Outstanding as of March 31, 2017~ g9~ ~   ~  J  $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2vj^R&K$ws=PF0*8X> @j           l  Y dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } 0.} $                          $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017,$NOTE I. Asset Retirement Obligations            Three Months Ended    March 31,  ~  ~ (in millions).&Beginning asset retirement obligations~ ~ v&New wells placed on production~ Liabilities settled~ ~ Accretion of discount~ ~ +#Ending asset retirement obligations~ ~ v$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/4vj^RFw7<=PF0*8X> @     l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement ObligatNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } <(} $                         $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017)!NOTE K. Interest and Other Income            Three Months Ended    March 31,  ~  ~ (in millions)Interest income~ ~ )!Deferred compensation plan income~  ~   Other income~ ~  'Total interest and other income~ 6~ "$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2'ymaUIz: )NB6=PF0*8X> @     l  ; dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } 0} $                            $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017NOTE L. Other Expense            Three Months Ended    March 31,  ~  ~ (in millions)-%Transportation commitment charges (a)~ ~ b/'Loss from vertical integration services~ ~ 6 (b)0(Idle drilling and well service equipment~  charges (c)Other~ >~ :Total other expense~ ~ ^$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/8ymaUF um=PF0*8X> @     l  5 dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other Expense!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } } $                      $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017NOTE M. Income Taxes            Three Months Ended    March 31,  ~  ~ (in millions)Deferred tax benefit~ ~~ 6$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/,|znbVGj=PF0*8X> @R      l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income TaxesOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } $} $ } } $ }  } $ } } $ } } $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017*"Operations and Drilling Highlights                 Oil (Bbls)   NGLs (Bbls)   Gas (Mcf)   Total (BOE) Permian Basin ~ 5  ~ :  ~ n   ~ A  & South Texas - Eagle Ford Shale ~ z  ~ >j  ~ :  ~ Z  Raton Basin~ }  ~ F West Panhandle~ 6~ B4~ :T  ~  a South Texas - Other~ *~ j~ 1  ~  H Other~ ~  ~ ~  ~  .  Total~ N~ ~   ~  0 $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2: xl`THfG;/#=PF0*8X> @:      l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } $} $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017*"Operations and Drilling Highlights                        Acquisition Costs   Exploration   Development     Proved  Unproved  Costs  Costs  Total   (in millions)Permian Basin~  ~ " ~  ~ ~ n&South Texas - Eagle Ford Shale ~   ~ ~ &West Panhandle   ~  ~  Other ~   ~  Total~  ~ " ~   ~ ~ $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2 xl`THL,Z=PF0*8X> @            l  + dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } $} $ } } $ } } $ } } $ } $} $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017*"Operations and Drilling Highlights                Development Drilling   Beginning Wells  Wells   Successful   Ending Wells    in Progress  Spud  Wells   in ProgressPermian Basin~ "~ ~   ~ * &South Texas - Eagle Ford Shale~   ~    Total~ 2~ ~   ~  : $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/.xl`THtS8, =PF0*8X> @b           l  : dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } $} $ } U} $ } $} $ } $} $ } } $ } U} $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017*"Operations and Drilling Highlights                  & Exploration/Extension Drilling   Beginning Wells  Wells   Successful   Unsuccessful   Ending Wells    in Progress  Spud  Wells  Wells   in ProgressPermian Basin~ ~ ~   ~  ~ 6&South Texas - Eagle Ford Shale~ :~   ~   ~ BTotal~ ~ ~   ~    ~ v$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/.xl`THF'XL@=PF0*8X> @r          l  G dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3) PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } <} $ } } $ } } $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017)!PIONEER NATURAL RESOURCES COMPANY          Three Months Ended    March 31,  ~  ~  Oil (Bbls)~ N~ ~ NGLs (Bbls)~ ~ e Gas (Mcf)~ ~  Total (BOEs)~ 0~ Ɖ$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/0ymaUIR,=PF0*8X> @:     l  T dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } } $                        $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017)!PIONEER NATURAL RESOURCES COMPANY            Three Months Ended    March 31,  ~  ~ Oil (per Bbl)fffffH@ףp= <@NGL (per Bbl)GzT3@)\$@Gas (per Mcf)RQ@p= ף?Total (per BOE)RB@HzG4@$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/0ymaUIz:`xlD=PF0*8X> @z     l  b dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } a/} $ } I                        $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017)!PIONEER NATURAL RESOURCES COMPANY            ) !Three Months Ended March 31, 2017   Net cash receipts   Price impact   (in millions)   Oil derivative receipts~ .zG? per BblNGL derivative receipts{Gz? per BblGas derivative receipts~ Q per Mcf/'Total net commodity derivative receipts~ * $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/0ymaUI3XN=PF0*8X> @j        l  p dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } a/} $ } I                        $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017)!PIONEER NATURAL RESOURCES COMPANY            ) !Three Months Ended March 31, 2016   Net cash receipts   Price impact   (in millions)   Oil derivative receipts~  (\B1@ per BblNGL derivative receipts~ q= ףp? per BblGas derivative receipts~ RQ? per Mcf/'Total net commodity derivative receipts~ j $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/0ymaUI3XL=PF0*8X> @r        l  ~~ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } 0.} $                         $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017)!PIONEER NATURAL RESOURCES COMPANY            Three Months Ended    March 31,  ~  ~  Lease operating expenses(\@@*"Third-party transportation charges)\(?)\(?.&Net natural gas plant (income) chargesQѿ)\(?Workover costszG?Q?Total production costs= ףp=@ףp= @$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2ymaUIz:@L=PF0*8X> @     l  P dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } -} $                       $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017)!PIONEER NATURAL RESOURCES COMPANY            Three Months Ended    March 31,  ~  ~ Production taxesq= ףp??Ad valorem taxesp= ף?Q?-%Total production and ad valorem taxeszG@\(\?$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/.xymaUIz:Z=PF0*8X> @j     l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } '} $                         $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017)!PIONEER NATURAL RESOURCES COMPANY            Three Months Ended    March 31,  ~  ~ (in millions)"Geological and geophysical~ ^~ NExploratory well costs~ *~ ( Leasehold abandonments and other~ ~ ~ $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2ymaUIz: )[OC=PF0*8X> @z     l  ` dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6) PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } 0.}  $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017JBItem 3. Quantitative and Qualitative Disclosures About Market Risk               & Derivative Contract Net Assets    Commodities  Interest Rates  Total   (in millions).&Fair value of contracts outstanding as~ ~  ~  of December 31, 2016&Changes in contract fair value~ ^ ~  ^ "Contract maturity receipts~  ~   .&Fair value of contracts outstanding as~ ~  ~   of March 31, 2017$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2wXL@4(JI=PF0*8X> @           l  v dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } +} $ } $} $ } $} $ } $} $ } $} $ } $} $ } $}  $ !!!!!!!!!! ! ! ! !!!!!!!!!!!!!!$PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017)!PIONEER NATURAL RESOURCES COMPANY                                   ' Nine Months Ending December 31,  Year Ending December 31,     1 )Asset (Liability) Fair Value at March 31,  ~  ~  ~  ~  ~    Thereafter  Total ~    (dollars in millions) Total Debt:  +#Fixed rate principal maturities (a)~ ~   ~   ~  ~ ~ ~ *~  ,$Weighted average fixed interest rate= ףp=@ %q= ףp@ % ~    %Gz@ %zG@ %(\@ %&Average variable interest rateQ@ %ףp= @ %  RQ @  %)\(@ %Interest Rate Swaps:   Notional debt amount (b)~ ~  ~   ~ ~ ~ ~  Fixed rate payable (%)(\? %  ( Variable rate receivable (%) (c) ףp= @ %  $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/8ymaUI%}=PF0*8X> @R*                   l  @!M dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } 2} $ @    $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017)!PIONEER NATURAL RESOURCES COMPANY                         ~   Year Ending December 31,1 )Asset (Liability) Fair Value at March 31,  Second Quarter  Third Quarter  Fourth Quarter ~  ~   2017 (a)            (in millions)Oil Derivatives:  +#Average daily notional Bbl volumes:  Collar contracts~ ]~ ]~  ]  ~ .&Weighted average ceiling price per BblQ@Q@ Q@  ~ ~ ,$Weighted average floor price per Bbl~ ~ ~    ~ ~ ,$Collar contracts with short puts (b)~ ~ ~  u   ~ 8~ .&Weighted average ceiling price per BblQN@p= O@ (\O@  )\HP@~ ,$Weighted average floor price per Bbl{G:H@HzH@ )\H@  ~ ~ 0(Weighted average short put price per Bbl9D@)\D@ (\D@  ~ ~ ,$Average forward NYMEX oil prices (c)QkH@33333H@ (\I@  {GI@~ %Rollfactor swap contracts (d)~ 8~ 8~  8  ~ ,$Weighted average fixed price per Bbl{GzԿ{GzԿ {GzԿ  ~ ~ /'Average forward NYMEX rollfactor pricesٿ333333ӿ RQȿ  ~ ~  (c)NGL Derivatives:  ( Butane swap contracts (Bbl) (e):~ B~ B   ~ ,$Weighted average fixed price per BblGznA@GznA@~    ~ ~ /'Butane collar contracts with short puts~ B~ B   ~  (Bbl) (f):DlymaUI)H !"#$%&'()*+,-./0123456789:;<=>?. &Weighted average ceiling price per Bbl (\B@   (\B@  ~   ~   ~    ,!$Weighted average floor price per Bbl!@=@!!!@=@!!~ ! ! ! ~ !!!~ !!!!0"(Weighted average short put price per Bbl"ffffff7@"""ffffff7@""~ " " " ~ """~ """")#!Average forward butane prices (c)# ףp=J?@###Hz?@##~ # # # ~ ###~ ####)$!Ethane collar contracts (Bbl) (g)~ $.$$~ $.$$~ $ .$ $ $$$$$$~ $$.%&Weighted average ceiling price per Bbl%)\'@%%%)\'@%%% )\'@% % ~ %%%~ %%%%,&$Weighted average floor price per Bbl&\(\!@&&&\(\!@&&& \(\!@& & ~ &&&~ &&&&)'!Average forward ethane prices (c)'%@'''p= ף%@''' Gz&@' ' '33333(@'''Hz*@'''/('Ethane basis swap contracts (MMBtu) (h)~ ("l((~ ("l((~ ( "l( ( ~ ("l((~ ("l((~ ((/)'Weighted average price differential per)?)))?))) ?) ) )?)))?)))*MMBtu,+$Average forward NYMEX gas prices (c)+(\ @+++ffffff @+++ Q @+ + +p= ף@+++(\@+++,Gas Derivatives:,,,,, , ,,,,,--%Average daily notional MMBtu volumes:----- - -----(. Collar contracts with short puts~ .z..~ .B..~ . O. . ~ ......~ ..0/(Weighted average ceiling price per MMBtu/{Gz @///(\ @///  @/ / /{Gz @//~ ////.0&Weighted average floor price per MMBtu0@000@000 Gz@0 0 0HzG@00~ 000021*Weighted average short put price per MMBtu1(\@111(\@111 (\@1 1 1(\@11~ 1111,2$Average forward NYMEX gas prices (c)2(\ @222ffffff @222 Q @2 2 2p= ף@22~ 22223Basis swap contracts33333 3 3333~ 33.4&Mid-Continent index swap contracts (i)~ 4"44~ 4"44~ 4 "4 4 4444444.5&Weighted average fixed price per MMBtu5{GzԿ555{GzԿ555 {GzԿ5 5 ~ 555~ 555516)Average forward basis differential prices6zGڿ666(\ؿ666 ffffffֿ6 6 ~ 666~ 6666 7(j).8&Permian Basin index swap contracts (k)888888~ 8 j8 8 ~ 8888888.9&Weighted average fixed price per MMBtu~ 999~ 9999 333333?9 9 9333333?99~ 99991:)Average forward basis differential prices~ :::~ :::: p= ף?: : :(\?::~ :::: ;(l)<$=____________________________1>)Created by Morningstar Document Research.0?(http://documentresearch.morningstar.com/DlKI;/ckcXISOH9-=PF0*8X> @??>>==:::::: ::::999999 999988 88666666 6666555555 5555444444 33222222 2222111111 1111000000 0000////// ////...... ....++++++ ++++)))))) ))))(((((( (((((('''''' ''''&&&&&& &&&&%%%%%% %%%%$$$$$$ $$###### ####"""""" """"!!!!!! !!!!                          l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8) ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } m} $ }  } $     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017NFPurchases of Equity Securities by the Issuer and Affiliated Purchasers                Period  Total Number of  Average Price Paid per  Total Number of  Approximate Dollar   Shares Purchased (a)  Share  Shares  Amount of Shares that          Purchased As Part of  May Yet Be Purchased Publicly Announced  under Plans or Plans or Programs  Programs January 2017~ B ףp=f@    February 2017~ &q= ףXh@     March 2017~ = ףpg@    Total~ u (\g@   ~  $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/4 TH<0$p`cqeY1=PF0*8X> @            l  H#073 dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities Exhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } I } $ } } $ } 8 H    $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017Exhibits      Exhibit     Description Number 333333$@   0 (Amended and Restated Severance Agreement4,dated February 27, 2017, between the Company6.and Timothy L. Dove (incorporated by reference0(to Exhibit 10.1 to the Company's Current3+Report on Form 8-K, File No. 1-13245, filed'with the SEC on March 3, 2022).ffffff$@ (a)0(Form of Performance Unit Award Agreement0(between the Company and Timothy L. Dove,7/with respect to awards made under the Company's&2006 Long-Term Incentive Plan.$@ (a)/'Form of Restricted Stock Unit Agreement0(between the Company and Timothy L. Dove,0(with respect to annual awards made under.&the Company's 2006 Long-Term IncentivePlan.333333(@ (a)2*Computation of Ratios of Earnings to Fixed1)Charges and Earnings to Fixed Charges andD lznb&\&d@oR !"#$%&'()*+,-./0123456789:;<=>?    " Preferred Stock Dividends.!!!!!"?@" "(a)"-"%Chief Executive Officer certification####/#'under Section 302 of Sarbanes-Oxley Act$$$$$of 2002.%%%%%&333333?@& &(a)&-&%Chief Financial Officer certification''''/''under Section 302 of Sarbanes-Oxley Act(((((of 2002.)))))* @@* *(b)*-*%Chief Executive Officer certification++++/+'under Section 906 of Sarbanes-Oxley Act,,,,,of 2002.-----.@@. .(b).-.%Chief Financial Officer certification//////'under Section 906 of Sarbanes-Oxley Act00000of 2002.111112fffffW@2 2(a)2 2Mine Safety Disclosures.333334101.INS4 4(a)44XBRL Instance Document.555556101.SCH6 6(a)6'6XBRL Taxonomy Extension Schema.777778101.CAL8 8(a)848,XBRL Taxonomy Extension Calculation Linkbase99999 Document.:::::;101.DEF; ;(a);3;+XBRL Taxonomy Extension Definition Linkbase<<<<< Document.=====>101.LAB> >(a)>.>&XBRL Taxonomy Extension Label Linkbase????? Document.D ln]!Tjv:Dgt@ABCDEFG@@@@@A101.PREA A(a)A,A$XBRL Taxonomy Extension PresentationBBBBBLinkbase Document.CD$E____________________________1F)Created by Morningstar Document Research.0G(http://documentresearch.morningstar.com/=Z =PF0*8X> @GGFFEE l  HEQQS dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  Exhibits!1012 Confidential Information aPeer Companies EXHIBIT 121Mine Safety DisclosureU } I } $ } } $ } 8 H    $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017Exhibit Index      Exhibit     Description Number 333333$@   0 (Amended and Restated Severance Agreement4,dated February 27, 2017, between the Company6.and Timothy L. Dove (incorporated by reference0(to Exhibit 10.1 to the Company's Current3+Report on Form 8-K, File No. 1-13245, filed'with the SEC on March 3, 2022).ffffff$@ (a)0(Form of Performance Unit Award Agreement0(between the Company and Timothy L. Dove,7/with respect to awards made under the Company's&2006 Long-Term Incentive Plan.$@ (a)/'Form of Restricted Stock Unit Agreement0(between the Company and Timothy L. Dove,0(with respect to annual awards made under.&the Company's 2006 Long-Term IncentivePlan.333333(@ (a)2*Computation of Ratios of Earnings to Fixed1)Charges and Earnings to Fixed Charges andD lui]!W!_;jM !"#$%&'()*+,-./0123456789:;<=>?    " Preferred Stock Dividends.!!!!!"?@" "(a)"-"%Chief Executive Officer certification####/#'under Section 302 of Sarbanes-Oxley Act$$$$$of 2002.%%%&333333?@& &(a)&-&%Chief Financial Officer certification''''/''under Section 302 of Sarbanes-Oxley Act(((((of 2002.)))* @@* *(b)*-*%Chief Executive Officer certification++++/+'under Section 906 of Sarbanes-Oxley Act,,,,,of 2002.---.@@. .(b).-.%Chief Financial Officer certification//////'under Section 906 of Sarbanes-Oxley Act00000of 2002.1112fffffW@2 2(a)2 2Mine Safety Disclosures.333334101.INS4 4(a)44XBRL Instance Document.5556101.SCH6 6(a)6'6XBRL Taxonomy Extension Schema.7778101.CAL8 8(a)848,XBRL Taxonomy Extension Calculation Linkbase99999 Document.:::;101.DEF; ;(a);3;+XBRL Taxonomy Extension Definition Linkbase<<<<< Document.===>101.LAB> >(a)>.>&XBRL Taxonomy Extension Label Linkbase????? Document.D ln]9l(7e=@fB@ABCDEFG@@@A101.PREA A(a)A,A$XBRL Taxonomy Extension PresentationBBBBBLinkbase Document.CD$E____________________________1F)Created by Morningstar Document Research.0G(http://documentresearch.morningstar.com/%r$ =PF0*8X> @GGFFEE l  N^ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit IndexPeer Companies EXHIBIT 121Mine Safety DisclosureU } y } -     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017;31012. Confidential Information and Nonsolicitation. Company:) !Pioneer Natural Resources Company ! Attn: Corporate Secretary - %5205 N. O Connor Boulevard, Suite 200  Irving, Texas 75039-3746$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(Tg[OC+|L@4 =PF0*8X> @ l  fr dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information a EXHIBIT 121Mine Safety DisclosureU } a} $ } a/} $ } a/} $ } a/} $ } a/} $ } a/                             $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017Peer Companies:              11 Peer Companies  10 Peer Companies  9 Peer  8 Peer Companies  7 Peer Companies        Companies Rank Against Peers / 'Percentage of Initial Performance Units / 'Percentage of Initial Performance Units / 'Percentage of Initial Performance Units / 'Percentage of Initial Performance Units / 'Percentage of Initial Performance UnitsEarnedEarnedEarnedEarned  Earned~  250% 250% 250% 250%   250%~   200% 200% 200% 200%   200%~  175% 175% 170% 166%   155%~  150% 150% 140% 133%   110%~  125% 125% 110% 100%   70%~  110% 100% 80% 65%   30%~  75% 75% 50% 30%   0%~ " 50% 50% 25% 0%   0%~ & 25% 25% 0% 0%~ * 0% 0% 0%( 11 ____________________________8012 Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/: sg[ UK| =PF0*8X> @   l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer CompaniesMine Safety DisclosureU } :} $ } a} $ }  } $ }  } $ }  } $ } } $ }     $PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017 EXHIBIT 12.1                Three Months Ended  Year ended December 31,   March 31, 2017 ~  ~ ~ ~ z ~ v ~ r. &Ratio of earnings to fixed charges (a)  (b)  (c)  (d)  fffff"@  (e)  Gz@    80Ratio of earnings to fixed charges and preferred (b) (c) (d)fffff"@   (e)  Gz@stock dividends (f)$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/,|vj^]3O0$=PF0*8X> @"    l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??.!FORM 10Q For the quarterly peri Yes No TABLE OF CONTENTSBalance SheetBalance Sheet (1)Income Statement!CONSOLIDATED STATEMENT OF EQUIT Cash Flows!NOTE C Acquisitions and DivestiMarch 31 2017UnauditedMarch 31 2017Un (1)March 31 2017Un (2)Balance Sheet (2)March 31 2017Un (3)March 31 2017Un (4)March 31 2017Un (5)March 31 2017Un (6)March 31 2017Un (7)March 31 2017Un (8)NOTE F Exploratory CostsNOTE F Exploratory (1)Stockbased compensation !NOTE I Asset Retirement Obligat!NOTE K Interest and Other IncomNOTE L Other ExpenseNOTE M Income Taxes!Operations and Drilling HighligOperations and Drilling (1)Operations and Drilling (2)Operations and Drilling (3)!PIONEER NATURAL RESOURCES COMPA PIONEER NATURAL RESOURCES (1) PIONEER NATURAL RESOURCES (2) PIONEER NATURAL RESOURCES (3) PIONEER NATURAL RESOURCES (4) PIONEER NATURAL RESOURCES (5) PIONEER NATURAL RESOURCES (6)!Item 3 Quantitative and Qualita PIONEER NATURAL RESOURCES (7) PIONEER NATURAL RESOURCES (8)!Purchases of Equity Securities  ExhibitsExhibit Index!1012 Confidential Information aPeer Companies EXHIBIT 121U } +} $ } } $ } 0} $ } U5} #$ $$$$$$$$$$ $ $ $ $$$$$$$$$$$$$$$PIONEER NATURAL RESOURCES CO 10-Q 05/03/2017Mine Safety Disclosure                                  ! " #* "Mine/MSHA Identification Number(1)  Section  Section  Section  Section  Section & Total Dollar Value of Proposed  Mining 0 (Received Notice of Pattern of Violations 4 ,Received Notice of Potential to have Pattern (  Legal Actions Pending as of Last - %Legal Actions Initiated During Period !, "$Legal Actions Resolved During Period  ~   104(b)  104(d)   110(b)(2)  107(a)   Assessments  Related  under Section 104(e)  under Section 104(e)  Day of Period   S&S  Orders   Citations   Violations  Orders       Fatalities  (yes/no)  (yes/no) Citations andOrders%Riverside Operation / 0404263    ~  No No !"#,$Colorado Springs Operation / 0503295~     ~ = No No !"#$Millwood Operation / 3301355~      ~  No No !"#$Voca Pit and Plant / 4101003~ "    ~  No No !"#Brady Plant / 4101371    ~  No No !"#Voca West / 4103618~     ~  No No !"#$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/8zxl`TRNE}7+=PF0*8X> @"$###                      "# Root Entry FBook    !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~     !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~