ࡱ> ij 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#܈ ~~9#܈ ~~8"܈ ~~4#܈ ~~83ffff̙̙3f3fff3f3f33333f33&  TRANSITION REPORT PURSUANT& TRANSITION REPORT PURS (1)&  TRANSITION REPORT PURS (2)&,Pioneer Natural Resources Stock&6Pioneer Natural Resources S (1)&>Pioneer Natural Resources S (2)&'PPioneer Natural Resources S (3)&ZPioneer Natural Resources S (4)&dPioneer Natural Resources S (5)&lSchedule H Line 4i ndash Schedu&Schedule H Line 4i ndash Sc (1)&Schedule H Line 4i ndash Sc (2)&LSchedule H Line 4i ndash Sc (3)&Schedule H Line 4i ndash Sc (4)&Schedule H Line 4i ndash Sc (5)&.Schedule H Line 4i ndash Sc (6)&xSchedule H Line 4i ndash Sc (7)&Schedule H Line 4i ndash Sc (8) l  ! dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } 6} $ }  !    $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009?7/ / TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE Page   / 'Report of Independent Registered Public ~  Accounting Firm   .&Statements of Net Assets Available for~ 1)Benefits as of December 31, 2021 and 20074,Statement of Changes in Net Assets Available~ 'for Benefits for the Year EndedDecember 31, 2008%Notes to Financial Statements~ 0(Schedule H; Line 4i - Schedule of Assets~ >5-(Held At End of Year) as of December 31, 2008 Signatures~ BIndex to Exhibits~ F$____________________________1)Created by Morningstar Document Research.DlcWK?gpE(Og[O 0 (http://documentresearch.morningstar.com/H=PF0*8X> @  l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } :} m     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009?7/ / TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE December 31, ~ b~ ^ ! Investments at fair value $ 141,238,345 $ 192,958,904 Participant loans~ f!~ ZD2*Net assets available for benefits, at fair~ "~ :.value.&Adjustment from fair value to contract~ b0~ .*"value for fully benefit-responsive80investment contracts held by a common/collectivetrust)!Net assets available for benefits$ 146,081,281$ 196,858,969$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/:AcWK?W3TxlD=PF0*8X> @" l  "x+Q, dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } 8}   "    $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009?7/ / TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE7/Additions to net assets available for benefits:$ Interest and dividend income  $ 6,644,491 Employer contributions~ 2# Participants' contributions~   Rollovers~ "4Total additions~ 6~M0(Deductions from net assets available for benefits:5-Net depreciation in fair value of investments~ x^%Distributions to participants~ &rAdministrative expenses~ Other expense~ 'Total deductions~ h0(Net decrease in net assets available for~ benefits4,Net assets available for benefits, beginning~ fQ.of year.&Net assets available for benefits, end$ 146,081,281of year$____________________________DVlcWK?T1TA-q^ !1 )Created by Morningstar Document Research.0!(http://documentresearch.morningstar.com/=PF0*8X> @!!  l  +6 dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } *} <     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009,$Pioneer Natural Resources Stock Fund December 31, ~ b~ ^  Vanguard PRIMECAP Fund  $ 26,524,252  $ 40,148,842(  Vanguard Prime Money Market Fund  $ 17,994,987  $ 18,006,113Vanguard 500 Index Fund $ 15,753,183 $ 25,323,499 Vanguard Windsor II Fund $ 15,387,554 $ 26,996,659Sarofim Equity Fund $ 9,977,216 $ 13,867,619+#Vanguard Retirement Savings Trust V $ 7,759,077 $ 6,985,345*"Vanguard International Growth Fund $ 7,167,929 $ 14,380,956$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2vj^R.LW]=PF0*8X> @" l  B> dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } 6}      $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009,$Pioneer Natural Resources Stock Fund+#Registered investment company funds$ (51,782,984) Common/collective trusts~ ., $Pioneer Natural Resources Stock Fund~   5 -Net depreciation in fair value of investments $ (64,462,343)$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(Tvj^R ."=PF0*8X> @ l  8O dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } +} $ } } $ }  } $ } <} $ } m} $     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009,$Pioneer Natural Resources Stock Fund1)Fair Value Measurements at Reporting Date   Using    Quoted Prices In    Significant           Active Markets   Other    Significant        for Identical    Observable    Unobservable   Fair Value at AssetsInputs Inputs    December 31, (Level 1) (Level 2)  (Level 3)  ~  b(in thousands)Assets:    +#Registered investment company funds~ * $- $- ~  * Common/collective trusts -~ :  -  ~  :,$Pioneer Natural Resources Stock Fund~ jQm -  -  ~  jQmParticipant loans - -~  f!  ~  f! Total assets~ q~ :~ f! ~  "$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/:T vj^RGoTqeY1=PF0*8X> @r       l  Y dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } 1} $ } } $     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009,$Pioneer Natural Resources Stock Fund Year Ended1 )Fair Value Measurements Using Significant   December 31,   Unobservable Inputs (Level 3) ~ b     Beginning balance~ ZDRealized gains (a)~ n*"Contributions and withdrawals, net~ WEnding balance~ f!$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/4vj^RY)f~rJ=PF0*8X> @B   l  zc dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } 2} m     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009,$Pioneer Natural Resources Stock Fund December 31, ~ b~ ^ 1 )Net assets available for benefits per the $ 146,081,281 $ 196,858,969) !accompanying financial statements.&Adjustment from fair value to contract~ ~ 92*value for certain fully benefit-responsiveinvestment contracts2*Net assets available for benefits per Form$ 145,979,881$ 196,911,822~ U$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2Avj^R.f6(=PF0*8X> @" l  4l dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } U5}      $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009,$Pioneer Natural Resources Stock Fund0(Net decrease in net assets available for$ (50,777,688)/ 'benefits per the accompanying financial  statements4 ,Less: Adjustment from fair value to contract~ Ε2 *value for certain fully benefit-responsiveinvestment contracts"Net decrease per Form 5500$ (50,931,941)$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/.vj^Ru?=PF0*8X> @ l  S{- dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } } <(} 1} < S    $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009KCSchedule H; Line 4i ndash; Schedule of Assets (Held At End Of Year) (c)  (b)+ #Description of investment including (e) % Identity of issuer, borrower,(  maturity date, rate of interest, Current (a) lessor, or similar party) !collateral, par or maturity value Value     *( Vanguard Fiduciary Trust Company/'Vanguard PRIMECAP Fund - 595,515 shares $ 26,524,252 *( Vanguard Fiduciary Trust Company*"Vanguard Prime Money Market Fund -17,994,987 shares~ SJ *( Vanguard Fiduciary Trust Company0(Vanguard 500 Index Fund - 189,592 shares~ ~ *( Vanguard Fiduciary Trust Company1)Vanguard Windsor II Fund - 805,210 shares~ . *( Vanguard Fiduciary Trust Company,$Vanguard Retirement Savings Trust V-~ 7,759,077 shares *( Vanguard Fiduciary Trust Company,$Vanguard International Growth Fund -~ ~587,535 shares *( Vanguard Fiduciary Trust Company( Vanguard Total Bond Market IndexFund - 629,312 shares~  *( Vanguard Fiduciary Trust Company,$Vanguard Short-Term Investment-Grade~ ڷuFund - 633,195 shares *( Vanguard Fiduciary Trust Company/'Vanguard Inflation-Protected Securities~ 0aFund - 502,315 sharesDN lWK?33Xa? *(  Vanguard Fiduciary Trust Company. &Vanguard Explorer Fund - 98,406 shares~   !*(! Vanguard Fiduciary Trust Company(! Vanguard Asset Allocation Fund -!"""220,017 shares~ " #*(# Vanguard Fiduciary Trust Company.#&Vanguard Target Retirement 2010 Fund -#$$$~ $ڠL%%%71,293 shares &*(& Vanguard Fiduciary Trust Company.&&Vanguard Target Retirement 2015 Fund -&'''~ ':J(((127,968 shares )*() Vanguard Fiduciary Trust Company.)&Vanguard Target Retirement 2025 Fund -)***~ *^|G+++126,346 shares ,*(, Vanguard Fiduciary Trust Company.,&Vanguard Target Retirement 2020 Fund -,---~ -.H;...58,616 shares /*(/ Vanguard Fiduciary Trust Company./&Vanguard Target Retirement 2035 Fund -/000~ 0211190,144 shares 2*(2 Vanguard Fiduciary Trust Company.2&Vanguard Target Retirement 2050 Fund -~ 2S"33~ 3B444shares 5*(5 Vanguard Fiduciary Trust Company-5%Vanguard Extended Market Index Fund -5666~ 6s 77722,143 shares 8*(8 Vanguard Fiduciary Trust Company.8&Vanguard Target Retirement 2045 Fund -8999~ 9/:::51,675 shares ;*(; Vanguard Fiduciary Trust Company.;&Vanguard Target Retirement 2005 Fund -~ ; <<~ <b===shares >*(> Vanguard Fiduciary Trust Company.>&Vanguard Target Retirement 2030 Fund -~ >??~ ?nJD l_-S!xFlS!yGwM@ABCDEFGHIJKLMNOPQR@@@shares A*(A Vanguard Fiduciary Trust Company.A&Vanguard Target Retirement 2040 Fund -~ AF BB~ BR CCCshares D*(D Vanguard Fiduciary Trust Company.D&Vanguard Target Retirement Income Fund~ DznEE E-FFF11,069 sharesGGFayez Sarofim & Co.,G$Sarofim Equity Fund - 218,511 shares~ G` H*)H!Pioneer Natural Resources Company.H&Pioneer Natural Resources Stock Fund -~ HjQmIIIJJJ1,023,140 units K*KParticipants loans/K'Interest rates range from 5.0% to 9.25%~ Kf!LLLLMMMM $ 45,979,881NO$P____________________________1Q)Created by Morningstar Document Research.0R(http://documentresearch.morningstar.com/*h]7o>[7h, =PF0*8X> @RRQQPP l  { dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } } } 0     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009KCSchedule H; Line 4i ndash; Schedule of Assets (Held At End Of Year)Date: June 15, 2009 By:/s/ Larry N. Paulsen   Larry N. Paulsen  0 (Member of Pioneer Natural Resources USA,   Inc.  * "401(k) and Matching Plan Committee$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(TWK?3e==PF0*8X> @ l  Ǟ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } } } 0     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009KCSchedule H; Line 4i ndash; Schedule of Assets (Held At End Of Year)Date: June 15, 2009 By:/s/ Richard P. Dealy   Richard P. Dealy  0 (Member of Pioneer Natural Resources USA,   Inc.  * "401(k) and Matching Plan Committee$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(TWK?3e==PF0*8X> @ l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } } } 0     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009KCSchedule H; Line 4i ndash; Schedule of Assets (Held At End Of Year)Date: June 15, 2009 By:/s/ Mark H. Kleinman   Mark H. Kleinman  0 (Member of Pioneer Natural Resources USA,   Inc.  * "401(k) and Matching Plan Committee$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(TWK?3e==PF0*8X> @ l  [ dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } } } 0     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009KCSchedule H; Line 4i ndash; Schedule of Assets (Held At End Of Year)Date: June 15, 2009 By:/s/ Kerry D. Scott   Kerry D. Scott  0 (Member of Pioneer Natural Resources USA,   Inc.  * "401(k) and Matching Plan Committee$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(TWK?3iA=PF0*8X> @ l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } } } 0     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009KCSchedule H; Line 4i ndash; Schedule of Assets (Held At End Of Year)Date: June 15, 2009 By:/s/ Susan A. Spratlen   Susan A. Spratlen  0 (Member of Pioneer Natural Resources USA,   Inc.  * "401(k) and Matching Plan Committee$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(TWK?3c;=PF0*8X> @ l   dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (7)!Schedule H Line 4i ndash Sc (8)U } } } 0     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009KCSchedule H; Line 4i ndash; Schedule of Assets (Held At End Of Year)Date: June 15, 2009 By:/s/ Douglas R. Hull   Douglas R. Hull  0 (Member of Pioneer Natural Resources USA,   Inc.  * "401(k) and Matching Plan Committee$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(TWK?3g?=PF0*8X> @ l  9 dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (8)U } } } 0     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009KCSchedule H; Line 4i ndash; Schedule of Assets (Held At End Of Year)Date: June 15, 2009 By:/s/ Paul McDonald   Paul McDonald  0 (Member of Pioneer Natural Resources USA,   Inc.  * "401(k) and Matching Plan Committee$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(TWK?3kC=PF0*8X> @ l  o dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??! TRANSITION REPORT PURSUANT! TRANSITION REPORT PURS (1)! TRANSITION REPORT PURS (2)!Pioneer Natural Resources Stock!Pioneer Natural Resources S (1)!Pioneer Natural Resources S (2)!Pioneer Natural Resources S (3)!Pioneer Natural Resources S (4)!Pioneer Natural Resources S (5)!Schedule H Line 4i ndash Schedu!Schedule H Line 4i ndash Sc (1)!Schedule H Line 4i ndash Sc (2)!Schedule H Line 4i ndash Sc (3)!Schedule H Line 4i ndash Sc (4)!Schedule H Line 4i ndash Sc (5)!Schedule H Line 4i ndash Sc (6)!Schedule H Line 4i ndash Sc (7)U } } } 0     $PIONEER NATURAL RESOURCES CO 11-K 06/19/2009KCSchedule H; Line 4i ndash; Schedule of Assets (Held At End Of Year)Date: June 15, 2009 By:   Andrew Quarles  0 (Member of Pioneer Natural Resources USA,   Inc.  * "401(k) and Matching Plan Committee$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/(TWK?3{S=PF0*8X> @ Root Entry FBook    !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefgh