Common use of Limited Use Issuer Free Writing Prospectus Clause in Contracts

Limited Use Issuer Free Writing Prospectus. “Limited Use Issuer Free Writing Prospectus” includes the following: None SCHEDULE II Underwriters Principal Amount of Securities to be Purchased Xxxxxxx Sachs & Co. LLC US $ 82,500,000 Xxxxxx Xxxxxxx & Co. LLC $ 82,500,000 TD Securities (USA) LLC $ 82,500,000 Xxxxx Fargo Securities, LLC $ 82,500,000 BofA Securities, Inc. $ 45,000,000 Citigroup Global Markets Inc. $ 45,000,000 Credit Suisse (USA) LLC $ 45,000,000 X.X. Xxxxxx Securities LLC $ 45,000,000 Barclays Capital Inc. $ 36,000,000 CIBC World Markets Corp. $ 36,000,000 MUFG Securities Americas Inc. $ 36,000,000 RBC Capital Markets, LLC $ 36,000,000 Scotia Capital (USA) Inc. $ 36,000,000 BBVA Securities Inc. $ 15,000,000 PNC Capital Markets LLC $ 15,000,000 Truist Securities, Inc. $ 15,000,000 U.S. Bancorp Investments, Inc. $ 15,000,000 Total US $ 750,000,000 SCHEDULE III Registration No. 333-241031 May 10, 2021 Pioneer Natural Resources Company Pricing Term Sheet Issuer: Pioneer Natural Resources Company Security Type: Senior Unsecured Offering Format: SEC Registered Expected Ratings:* Baa2/BBB/BBB+ (Stable/Stable/Stable) Trade Date: May 10, 2021 Settlement Date:** May 18, 2021 (T+6) Title of Securities: Senior Notes due 2023 Principal Amount: $750,000,000 Stated Maturity Date: May 15, 2023 US Treasury Benchmark: 0.125% due April 30, 2023 US Treasury Yield: 0.153% Spread to US Treasury: 0.400% Yield to Maturity: 0.553% Issue Price: 99.994% of face amount Coupon: 0.550% Interest Payment Dates: May 15 and November 15 commencing November 15, 2021 Optional Redemption: Greater of par or T + 10 bps CUSIP/ISIN: 723787 AU1 / US723787AU18 Joint Book-Running Managers: Xxxxxxx Sachs & Co. LLC Xxxxxx Xxxxxxx & Co. LLC TD Securities (USA) LLC Xxxxx Fargo Securities, LLC BofA Securities, Inc. Citigroup Global Markets Inc. Credit Suisse (USA) LLC X.X. Xxxxxx Securities LLC Senior Co-Managers: Barclays Capital Inc. CIBC World Markets Corp. MUFG Securities Americas Inc. RBC Capital Markets, LLC Scotia Capital (USA) Inc. Co-Managers: BBVA Securities Inc. PNC Capital Markets LLC Truist Securities, Inc. U.S. Bancorp Investments, Inc. * Note: A securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time. ** Under Rule 15c6-1 of the Securities Exchange Act of 1934, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the notes on the date of pricing or the following three business days will be required, by virtue of the fact that the notes initially will settle in T+6, to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement and should consult their own advisors. The Issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the Issuer has filed with the SEC for more complete information about the Issuer and this offering. You may get these documents for free by visiting XXXXX on the SEC Web site at xxx.xxx.xxx. Alternatively, the Issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by contacting Xxxxxxx Xxxxx & Co. LLC at 0-000-000-0000, Xxxxxx Xxxxxxx & Co. LLC at 1-866-718-1649, TD Securities (USA) LLC at 0-000-000-0000, or Xxxxx Fargo Securities, LLC at 0-000-000-0000. ANY DISCLAIMER OR OTHER NOTICES THAT MAY APPEAR BELOW ARE NOT APPLICABLE TO THIS COMMUNICATION AND SHOULD BE DISREGARDED, SUCH DISCLAIMERS OR OTHER NOTICES WERE AUTOMATICALLY GENERATED AS A RESULT OF THIS COMMUNICATION BEING SENT VIA BLOOMBERG OR ANOTHER EMAIL SYSTEM. ANNEX I Opinion of Xxxxxx & Xxxxxx LLP Counsel to the Company ANNEX II Opinion of General Counsel to the Company Annex II-1 ANNEX III FORM OF ENGINEERS’ RESERVE REPORT LETTER Annex III-1 APPENDIX 1 to ANNEX III AUDIT LETTER

Limited Use Issuer Free Writing Prospectus. “Limited Use Issuer Free Writing Prospectus” includes the following: None The electronic roadshow available at xxx.xxxxxxxxxxx.xxx SCHEDULE II Underwriters Principal Amount of Securities 2021 Notes to be Purchased Xxxxxxx Sachs Principal Amount of 2026 Notes to be Purchased XXXXXXX, XXXXX & Co. LLC US $ 82,500,000 Xxxxxx Xxxxxxx CO. US$ 80,000,000 US$ 80,000,000 XXXXXX XXXXXXX & Co. CO. LLC $ 82,500,000 TD Securities 80,000,000 $ 80,000,000 BARCLAYS CAPITAL INC. $ 80,000,000 $ 80,000,000 DEUTSCHE BANK SECURITIES INC. $ 80,000,000 $ 80,000,000 XXXXX FARGO SECURITIES, LLC $ 80,000,000 $ 80,000,000 CITIGROUP GLOBAL MARKETS INC. $ 12,500,000 $ 12,500,000 CREDIT SUISSE SECURITIES (USA) LLC $ 82,500,000 Xxxxx Fargo Securities12,500,000 $ 12,500,000 X.X. XXXXXX SECURITIES LLC $ 12,500,000 $ 12,500,000 XXXXXXX LYNCH, PIERCE, XXXXXX & XXXXX INCORPORATED $ 12,500,000 $ 12,500,000 BMO CAPITAL MARKETS CORP. $ 10,000,000 $ 10,000,000 MITSUBISHI UFJ SECURITIES (USA), INC. $ 10,000,000 $ 10,000,000 RBC CAPITAL MARKETS, LLC $ 82,500,000 BofA Securities, Inc. 10,000,000 $ 45,000,000 Citigroup Global Markets Inc. $ 45,000,000 Credit Suisse (USA) LLC $ 45,000,000 X.X. Xxxxxx Securities LLC $ 45,000,000 Barclays Capital Inc. $ 36,000,000 CIBC World Markets Corp. $ 36,000,000 MUFG Securities Americas Inc. $ 36,000,000 RBC Capital Markets10,000,000 SG AMERICAS SECURITIES, LLC $ 36,000,000 Scotia Capital (USA) Inc. 10,000,000 $ 36,000,000 BBVA Securities Inc. $ 15,000,000 PNC Capital Markets 10,000,000 UBS SECURITIES LLC $ 15,000,000 Truist Securities, Inc. 10,000,000 $ 15,000,000 U.S. Bancorp Investments, Inc. $ 15,000,000 10,000,000 Total US $ 750,000,000 US$ 500,000,000 US$ 500,000,000 SCHEDULE III Filed Pursuant to Rule 433 of the Act Registration No. 333-241031 May 10196430 November 30, 2021 2015 Pioneer Natural Resources Company Pricing Term Sheet Issuer: Pioneer Natural Resources Company Security Type: Senior Unsecured Offering Format: SEC Registered Trade Date: November 30, 2015 Original Issue/Settlement Date:** December 7, 2015 (T+5) Proceeds to the Issuer Before Expenses: $991,945,000 Senior Notes due 2021 Senior Notes due 2026 Principal Amount: $500,000,000 $500,000,000 Expected Ratings:* Baa2: Baa3/BBB/BBB+ BBB- (Stable/Stable) Baa3/BBB- (Stable/Stable) Trade DateCoupon: May 10, 2021 Settlement Date:** May 18, 2021 (T+6) Title of Securities: Senior Notes due 2023 Principal Amount: $750,000,000 3.45% 4.45% Stated Maturity Date: May January 15, 2023 2021 January 15, 2026 Issue Price: 99.750% of face amount 99.889% of face amount US Treasury Benchmark: 0.1251.625% due April 30, 2023 November 2020 2.250% due November 2025 US Treasury Yield: 0.1531.653% 2.213% Spread to US Treasury: 0.4001.85% 2.25% Yield to Maturity: 0.5533.503% Issue Price: 99.994% of face amount Coupon: 0.5504.463% Interest Payment Dates: May January 15 and November July 15 commencing November July 15, 2021 2016 January 15 and July 15 commencing July 15, 2016 Optional Redemption: Greater Prior to December 15, 2020, greater of par or T + 10 30 bps On or after December 15, 2020, at par Prior to October 15, 2025, greater of par or T + 35 bps On or after October 15, 2025, at par CUSIP/ISIN: 723787 AU1 AL1 / US723787AU18 US723787AL19 723787 AM9 / US723787AM91 Joint Book-Running Managers: Xxxxxxx Xxxxxxx, Sachs & Co. LLC Xxxxxx Xxxxxxx & Co. LLC TD Barclays Capital Inc. Deutsche Bank Securities (USA) LLC Inc. Xxxxx Fargo Securities, LLC BofA Securities, Inc. Senior Co-Managers: Citigroup Global Markets Inc. Credit Suisse Securities (USA) LLC X.X. Xxxxxx Securities LLC Senior Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated Co-Managers: Barclays BMO Capital Inc. CIBC World Markets Corp. MUFG Mitsubishi UFJ Securities Americas (USA), Inc. RBC Capital Markets, LLC Scotia Capital (USA) Inc. Co-Managers: BBVA Securities Inc. PNC Capital Markets LLC Truist SG Americas Securities, Inc. U.S. Bancorp Investments, Inc. * Note: A securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time. LLC UBS Securities LLC ** Under Rule 15c6-1 of the Securities Exchange Act of 1934, trades in the secondary market generally are required to settle in two three business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the notes on the date of pricing or the following three next succeeding business days day will be required, by virtue of the fact that the notes initially will settle in T+6T+5, to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement and should consult their own advisors. The Issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the Issuer has filed with the SEC for more complete information about the Issuer and this offering. You may get these documents for free by visiting XXXXX on the SEC Web site at xxx.xxx.xxx. Alternatively, the Issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by contacting Xxxxxxx Xxxxx & Co. LLC at 0-000-000-0000, Xxxxxx Xxxxxxx & Co. LLC at 1-866-718-1649, TD Securities (USA) LLC at 0-000-000-0000, or Xxxxx Fargo Securities, LLC at 0-000-000-0000. ANY DISCLAIMER OR OTHER NOTICES THAT MAY APPEAR BELOW ARE NOT APPLICABLE TO THIS COMMUNICATION AND SHOULD BE DISREGARDED, SUCH DISCLAIMERS OR OTHER NOTICES WERE AUTOMATICALLY GENERATED AS A RESULT OF THIS COMMUNICATION BEING SENT VIA BLOOMBERG OR ANOTHER EMAIL SYSTEM. ANNEX I Opinion of Xxxxxx & Xxxxxx LLP Counsel to the Company ANNEX II Opinion of General Counsel to the Company Annex II-1 ANNEX III FORM OF ENGINEERS’ RESERVE REPORT LETTER Annex III-1 APPENDIX 1 to ANNEX III AUDIT LETTER.

Limited Use Issuer Free Writing Prospectus. “Limited Use Issuer Free Writing Prospectus” includes the following: None SCHEDULE II Underwriters Principal Amount of Securities to be Purchased Xxxxxxx Sachs & Co. LLC BofA Securities, Inc. US $ 82,500,000 Xxxxxx Xxxxxxx & Co. LLC $ 82,500,000 165,000,000 TD Securities (USA) LLC $ 82,500,000 165,000,000 Xxxxx Fargo Securities, LLC $ 82,500,000 BofA Securities, Inc. $ 45,000,000 165,000,000 Citigroup Global Markets Inc. $ 45,000,000 Credit Suisse (USA) 67,834,000 Xxxxxxx Xxxxx & Co. LLC $ 45,000,000 67,834,000 X.X. Xxxxxx Securities LLC $ 45,000,000 Barclays Capital Inc. 67,833,000 Xxxxxx Xxxxxxx & Co. LLC $ 36,000,000 CIBC World Markets Corp. $ 36,000,000 MUFG Securities Americas Inc. $ 36,000,000 67,833,000 RBC Capital Markets, LLC $ 36,000,000 67,833,000 Scotia Capital (USA) Inc. $ 36,000,000 BBVA Securities 67,833,000 Barclays Capital Inc. $ 15,000,000 33,000,000 CIBC World Markets Corp. $ 33,000,000 Credit Suisse Securities (USA) LLC $ 33,000,000 MUFG Securities Americas Inc. $ 33,000,000 PNC Capital Markets LLC $ 15,000,000 22,000,000 Truist Securities, Inc. $ 15,000,000 22,000,000 U.S. Bancorp Investments, Inc. $ 15,000,000 22,000,000 Total US $ 750,000,000 1,100,000,000 SCHEDULE III Registration No. 333-241031 May 10March 27, 2021 2023 Pioneer Natural Resources Company Pricing Term Sheet Issuer: Pioneer Natural Resources Company Security Type: Senior Unsecured Offering Format: SEC Registered Expected Ratings:* Baa2*: Baa1/BBB/BBB+ (Stable/Stable/Stable) Trade Date: May 10March 27, 2021 2023 Settlement Date:** May 18: March 29, 2021 2023 (T+6T+2) Title of Securities: Senior Notes due 2023 2026 Principal Amount: $750,000,000 1,100,000,000 Stated Maturity Date: May 15March 29, 2023 2026 US Treasury Benchmark: 0.1254.625% due April 30March 15, 2023 2026 US Treasury Yield: 0.1533.798% Spread to US Treasury: 0.4001.320% Yield to Maturity: 0.5535.118% Issue Price: 99.99499.951% of face amount Coupon: 0.5505.100% Interest Payment Dates: May 15 March 29 and November 15 September 29 commencing November 15September 29, 2021 2023 Optional Redemption: Greater of par or T + 10 20 bps CUSIP/ISIN: 723787 AU1 AV9 / US723787AU18 US723787AV90 Joint Book-Running Managers: Xxxxxxx Sachs & Co. LLC Xxxxxx Xxxxxxx & Co. LLC BofA Securities, Inc. TD Securities (USA) LLC Xxxxx Fargo Securities, LLC BofA Securities, Inc. Citigroup Global Markets Inc. Credit Suisse (USA) Xxxxxxx Xxxxx & Co. LLC X.X. Xxxxxx Securities LLC Xxxxxx Xxxxxxx & Co. LLC RBC Capital Markets, LLC Scotia Capital (USA) Inc. Senior Co-Managers: Barclays Capital Inc. CIBC World Markets Corp. Credit Suisse Securities (USA) LLC MUFG Securities Americas Inc. RBC Capital Markets, LLC Scotia Capital (USA) Inc. Co-Managers: BBVA Securities Inc. PNC Capital Markets LLC Truist Securities, Inc. U.S. Bancorp Investments, Inc. * Note: A securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time. ** Under Rule 15c6-1 of the Securities Exchange Act of 1934, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the notes on the date of pricing or the following three business days will be required, by virtue of the fact that the notes initially will settle in T+6, to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement and should consult their own advisors. The Issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the Issuer has filed with the SEC for more complete information about the Issuer and this offering. You may get these documents for free by visiting XXXXX on the SEC Web site at xxx.xxx.xxx. Alternatively, the Issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by contacting Xxxxxxx Xxxxx & Co. LLC BofA Securities, Inc. at 0-000-000-0000, Xxxxxx Xxxxxxx & Co. LLC at 1-866-718-1649, TD Securities (USA) LLC at 0-000-000-0000, or Xxxxx Fargo Securities, LLC at 0-000-000-0000. ANY DISCLAIMER OR OTHER NOTICES THAT MAY APPEAR BELOW ARE NOT APPLICABLE TO THIS COMMUNICATION AND SHOULD BE DISREGARDED, SUCH DISCLAIMERS OR OTHER NOTICES WERE AUTOMATICALLY GENERATED AS A RESULT OF THIS COMMUNICATION BEING SENT VIA BLOOMBERG OR ANOTHER EMAIL SYSTEM. ANNEX I Opinion of Xxxxxx & Xxxxxx LLP Counsel to the Company ANNEX II Opinion of General Counsel to the Company Annex II-1 ANNEX III FORM OF ENGINEERS’ RESERVE REPORT LETTER Annex III-1 APPENDIX 1 to ANNEX III XXXXX XXX AUDIT LETTER

Limited Use Issuer Free Writing Prospectus. “Limited Use Issuer Free Writing Prospectus” includes the following: None SCHEDULE II Underwriters Principal Amount of Securities to be Purchased Xxxxxxx Sachs & Co. BofA Securities, Inc. US$ 132,000,000 X.X. Xxxxxx Securities LLC US $ 82,500,000 132,000,000 Xxxxx Fargo Securities, LLC 132,000,000 Barclays Capital Inc. 77,000,000 BMO Capital Markets Corp. 77,000,000 Citigroup Global Markets Inc. 77,000,000 Xxxxxx Xxxxxxx & Co. LLC $ 82,500,000 77,000,000 MUFG Securities Americas Inc. 77,000,000 TD Securities (USA) LLC $ 82,500,000 Xxxxx Fargo Securities, LLC $ 82,500,000 BofA Securities, Inc. $ 45,000,000 Citigroup Global Markets Inc. $ 45,000,000 77,000,000 Credit Suisse (USA) LLC $ 45,000,000 X.X. Xxxxxx Securities 33,000,000 Xxxxxxx Sachs & Co. LLC $ 45,000,000 Barclays Capital Inc. $ 36,000,000 CIBC World Markets Corp. $ 36,000,000 MUFG Securities Americas Inc. $ 36,000,000 33,000,000 RBC Capital Markets, LLC $ 36,000,000 33,000,000 Scotia Capital (USA) Inc. $ 36,000,000 BBVA Securities Inc. $ 15,000,000 PNC Capital Markets LLC $ 15,000,000 Truist Securities, Inc. $ 15,000,000 33,000,000 U.S. Bancorp Investments, Inc. $ 15,000,000 33,000,000 BBVA Securities Inc. 15,400,000 CIBC World Markets Corp. 15,400,000 Citizens Capital Markets, Inc. 15,400,000 PNC Capital Markets LLC 15,400,000 Truist Securities, Inc. 15,400,000 Total US $ 750,000,000 US$ 1,100,000,000 SCHEDULE III Filed Pursuant to Rule 433 of the Act Registration No. 333-241031 May 10August 6, 2021 2020 Pioneer Natural Resources Company Pricing Term Sheet Issuer: Pioneer Natural Resources Company Security Type: Senior Unsecured Offering Format: SEC Registered Expected Ratings:* *: Baa2/BBB/BBB+ BBB (Stable/Stable/Stable) Trade Date: May 10August 6, 2021 2020 Settlement Date:** May 18August 11, 2021 2020 (T+6T+3) Title of Securities: Senior Notes due 2023 2030 Principal Amount: $750,000,000 1,100,000,000 Stated Maturity Date: May 15Xxxxxx 00, 2023 US Treasury Benchmark0000 XX Xxxxxxxx Xxxxxxxxx: 0.1250.625% due April 30, 2023 May 2030 US Treasury Yield: 0.1530.538% Spread to US Treasury: 0.4001.450% Yield to Maturity: 0.5531.988% Issue Price: 99.99499.205% of face amount Coupon: 0.5501.900% Interest Payment Dates: May February 15 and November 15 August 15, commencing November February 15, 2021 Optional Redemption: Greater Prior to May 15, 2030, greater of par or T + 10 25 bps On or after to May 15, 2030, at par CUSIP/ISIN: 723787 AU1 / US723787AU18 AQ0/US723787AQ06 Joint Book-Running Managers: Xxxxxxx Sachs & Co. BofA Securities, Inc. X.X. Xxxxxx Securities LLC Xxxxx Fargo Securities, LLC Barclays Capital Inc. BMO Capital Markets Corp. Citigroup Global Markets Inc. Xxxxxx Xxxxxxx & Co. LLC MUFG Securities Americas Inc. TD Securities (USA) LLC Xxxxx Fargo Securities, LLC BofA Securities, Inc. Citigroup Global Markets Inc. Senior Co-Managers: Credit Suisse (USA) LLC X.X. Xxxxxx Securities Xxxxxxx Sachs & Co. LLC Senior Co-Managers: Barclays Capital Inc. CIBC World Markets Corp. MUFG Securities Americas Inc. RBC Capital Markets, LLC Scotia Capital (USA) Inc. U.S. Bancorp Investments, Inc. Co-Managers: BBVA Securities Inc. CIBC World Markets Corp. Citizens Capital Markets, Inc. PNC Capital Markets LLC Truist Securities, Inc. U.S. Bancorp Investments, Inc. * Note: A securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time. ** Under Rule 15c6-1 of the Securities Exchange Act of 1934, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the notes on the date of pricing or the following three business days will be required, by virtue of the fact that the notes initially will settle in T+6T+3, to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement and should consult their own advisors. The Issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the Issuer has filed with the SEC for more complete information about the Issuer and this offering. You may get these documents for free by visiting XXXXX on the SEC Web site at xxx.xxx.xxx. Alternatively, the Issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by contacting Xxxxxxx Xxxxx & Co. BofA Securities, Inc. at 1-800-294-1322 or xx.xxxxxxxxxx_xxxxxxxx@xxxx.xxx, X.X. Xxxxxx Securities LLC at 0-000-000-0000, Xxxxxx Xxxxxxx & Co. LLC at 1-866-718-1649, TD Securities (USA) LLC at 0-000-000-0000, 0000 or Xxxxx Fargo Securities, LLC at 0-000-000-0000. ANY DISCLAIMER OR OTHER NOTICES THAT MAY APPEAR BELOW ARE NOT APPLICABLE TO THIS COMMUNICATION AND SHOULD BE DISREGARDED, SUCH DISCLAIMERS OR OTHER NOTICES WERE AUTOMATICALLY GENERATED AS A RESULT OF THIS COMMUNICATION BEING SENT VIA BLOOMBERG OR ANOTHER EMAIL SYSTEM. ANNEX I Opinion of Xxxxxx & Xxxxxx LLP Counsel to the Company ANNEX II Opinion of General Counsel to the Company Annex II-1 ANNEX III FORM OF ENGINEERS’ RESERVE REPORT LETTER Annex III-1 APPENDIX 1 to ANNEX III AUDIT LETTERIII

Limited Use Issuer Free Writing Prospectus. “Limited Use Issuer Free Writing Prospectus” includes the following: None The electronic roadshow available at xxx.xxxxxxxxxxx.xxx SCHEDULE II Underwriters Principal Amount Underwriters of Securities to be Purchased Xxxxxxx Sachs & Co. LLC US Citigroup Global Markets Inc. US$ 96,000,000 Deutsche Bank Securities Inc. $ 82,500,000 Xxxxxx Xxxxxxx & Co. LLC $ 82,500,000 TD 96,000,000 Credit Suisse Securities (USA) LLC $ 82,500,000 96,000,000 UBS Securities LLC $ 96,000,000 Xxxxx Fargo Securities, LLC $ 82,500,000 BofA Securities, Inc. $ 45,000,000 Citigroup Global Markets Inc. $ 45,000,000 Credit Suisse (USA) LLC $ 45,000,000 96,000,000 X.X. Xxxxxx Securities LLC $ 45,000,000 Barclays Capital Inc. 25,000,000 Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated $ 36,000,000 CIBC World Markets Corp. $ 36,000,000 MUFG 25,000,000 Credit Agricole Securities Americas Inc. $ 36,000,000 RBC Capital Markets, LLC $ 36,000,000 Scotia Capital (USA) Inc. $ 36,000,000 BBVA 17,500,000 Xxxxxxx, Sachs & Co. $ 17,500,000 Mitsubishi UFJ Securities (USA), Inc. $ 17,500,000 RBS Securities Inc. $ 15,000,000 PNC Capital Markets LLC $ 15,000,000 Truist Securities, Inc. $ 15,000,000 U.S. Bancorp Investments, Inc. $ 15,000,000 17,500,000 Total US $ 750,000,000 US$ 600,000,000 SCHEDULE III Filed Pursuant to Rule 433 of the Act Registration No. 333-241031 May 10174402 June 21, 2021 2012 Pioneer Natural Resources Company Pricing Term Sheet Issuer: Pioneer Natural Resources Company Security Type: Senior Unsecured Offering Format: SEC Registered Principal Amount: $600,000,000 Expected Ratings:* Baa2: Baa3/BBB/BBB+ BBB- (Stable/Stable/Stable) Trade DateCoupon: May 10, 2021 Settlement Date:** May 18, 2021 (T+6) Title of Securities: Senior Notes due 2023 Principal Amount: $750,000,000 3.95% Stated Maturity Date: May July 15, 2023 2022 Issue Price: 99.44% of face amount US Treasury Benchmark: 0.1251.75% due April 30, 2023 May 2022 US Treasury Yield: 0.1531.618% Spread to US Treasury: 0.4002.40% Yield to Maturity: 0.5534.018% Issue PriceTrade Date: 99.994% of face amount CouponJune 21, 2012 Original Issue/Settlement Date: 0.550% June 26, 2012 Proceeds to the Issuer Before Expenses: $592,740,000 Interest Payment Dates: May January 15 and November July 15 commencing November January 15, 2021 2013 Optional Redemption: Greater Prior to April 15, 2022, greater of par or T + 10 37.5 bps On or after April 15, 2022, at par CUSIP/ISIN: 723787 AU1 AK3 / US723787AU18 US723787AK36 Joint Book-Running Managers: Xxxxxxx Sachs & Co. LLC Xxxxxx Xxxxxxx & Co. LLC TD Citigroup Global Markets Inc. Deutsche Bank Securities Inc. Credit Suisse Securities (USA) LLC UBS Securities LLC Xxxxx Fargo Securities, LLC BofA Securities, Inc. Citigroup Global Markets Inc. Credit Suisse (USA) LLC X.X. Xxxxxx Securities LLC Senior Co-Managers: Barclays Capital Inc. CIBC World Markets Corp. MUFG X.X. Xxxxxx Securities Americas Inc. RBC Capital MarketsLLC Xxxxxxx Lynch, LLC Scotia Capital Pierce, Xxxxxx & Xxxxx Incorporated Co-Managers: Credit Agricole Securities (USA) Inc. Co-Managers: BBVA Xxxxxxx, Sachs & Co. Mitsubishi UFJ Securities (USA), Inc. RBS Securities Inc. PNC Capital Markets LLC Truist Securities, Inc. U.S. Bancorp Investments, Inc. * Note: A securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time. ** Under Rule 15c6-1 of the Securities Exchange Act of 1934, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the notes on the date of pricing or the following three business days will be required, by virtue of the fact that the notes initially will settle in T+6, to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement and should consult their own advisors. The Issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the Issuer has filed with the SEC for more complete information about the Issuer and this offering. You may get these documents for free by visiting XXXXX on the SEC Web site at xxx.xxx.xxx. Alternatively, the Issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by contacting Xxxxxxx Xxxxx & Co. LLC at 0-000-000-0000, Xxxxxx Xxxxxxx & Co. LLC calling Citigroup Global Markets Inc. toll free at 1-866877-718858-1649, TD 5407 or Deutsche Bank Securities (USA) LLC Inc. toll free at 01-000800-000503-0000, or Xxxxx Fargo Securities, LLC at 0-000-000-00004611. ANY DISCLAIMER OR OTHER NOTICES THAT MAY APPEAR BELOW ARE NOT APPLICABLE TO THIS COMMUNICATION AND SHOULD BE DISREGARDED, SUCH DISCLAIMERS OR OTHER NOTICES WERE AUTOMATICALLY GENERATED AS A RESULT OF THIS COMMUNICATION BEING SENT VIA BLOOMBERG OR ANOTHER EMAIL SYSTEM. ANNEX I Opinion of Xxxxxx & Xxxxxx Xxxxxx, LLP Counsel to the Company ANNEX II Opinion of General Counsel to the Company Annex II-1 ANNEX III FORM OF ENGINEERS’ RESERVE REPORT LETTER Annex III-1 APPENDIX 1 to ANNEX III AUDIT LETTERCompany