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Form 4 or Form 5 obligations may continue. See Instruction 1(b).˜1. Name and Address of Reporting Person*Black Bonnie S. (Last) (First) (Middle) 777 HIDDEN RIDGE (Street) IRVING TX 75038 (City) (State) (Zip)Black Bonnie S.(Last)(First)(Middle)777 HIDDEN RIDGEIRVINGTX(City)(State)(Zip)\2. Issuer Name and Ticker or Trading Symbol PIONEER NATURAL RESOURCES CO [ PXD ]Ј5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) VP, DrillingDirector 10% OwnerXOfficer (give title below)Other (specify below) VP, DrillingD3. Date of Earliest Transaction (Month/Day/Year) 02/27/2020A4. If Amendment, Date of Original Filed (Month/Day/Year)˜6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person"Form filed by One Reporting Person,Form filed by More than One Reporting PersonPTable I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned&1. Title of Security (Instr. 3)*2. Transaction Date (Month/Day/Year)82A. Deemed Execution Date, if any (Month/Day/Year)%3. Transaction Code (Instr. 8)H4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)k5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)?6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)<7. Nature of Indirect Beneficial Ownership (Instr. 4)CodeVAmount (A) or (D)Price Common Stock 02/27/2020FDŒTable II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)11. Title of Derivative Security (Instr. 3)62. Conversion or Exercise Price of Derivative Security*3. Transaction Date (Month/Day/Year)83A. Deemed Execution Date, if any (Month/Day/Year)%4. Transaction Code (Instr. 8)d5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)?6. Date Exercisable and Expiration Date (Month/Day/Year)X7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)18. Price of Derivative Security (Instr. 5)p9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)@10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)=11. Nature of Indirect Beneficial Ownership (Instr. 4)(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares6Thomas J. Murphy, Attorney-in-Fact For Bonnie S. Black ** Signature of Reporting PersonDatekReminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.Ÿ* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).Љ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).ЌNote: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.žPersons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.џ P cc ЛЬ d-Cыт6?_€%,С*+‚ƒ„&ffffffц?'ffffffц?(ш?)ш?Ё"d,, Ж` Ж`р? 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