FANG

SEC source: 0001539838-26-000104 · wk-form4_1779400601.xml · nonDerivative · entry 1

Robertson Lance W · CIK 0001567274 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,999

F1 · shares: These securities are restricted stock units, each representing a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units were granted to Mr. Robertson as an annual non-employee director grant under the issuer's equity incentive plan and will vest on the earlier of the one-year anniversary of the date of grant and the date of the 2027 annual meeting of stockholders of the issuer.

SEC source: 0001539838-26-000108 · wk-form4_1779400628.xml · nonDerivative · entry 1

Dick Teresa L. · CIK 0001559931 · CAO, Exec. VP, Assist. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,755

SEC source: 0001539838-26-000087 · wk-form4_1779221361.xml · nonDerivative · entry 1

Barkmann Albert · CIK 0002012976 · Exec. VP and Chief Engineer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,571

F1 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $204.00 per share to $204.07 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001539838-26-000086 · wk-form4_1779221351.xml · nonDerivative · entry 1

Thompson Jere W III · CIK 0002012978 · CFO, Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,975

SEC source: 0001539838-26-000082 · wk-form4_1778788914.xml · nonDerivative · entry 1

Dick Teresa L. · CIK 0001559931 · CAO, Exec. VP, Assist. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 97,755

SEC source: 0001539838-26-000083 · wk-form4_1778788920.xml · nonDerivative · entry 1

Zmigrosky Matt · CIK 0001767328 · EVP, Chief Legal and Admin Off

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,392

SEC source: 0001539838-26-000079 · wk-form4_1778530178.xml · nonDerivative · entry 7

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 934,864

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F9 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $189.195 per share to $190.195 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000079 · wk-form4_1778530178.xml · nonDerivative · entry 6

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 938,773

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F8 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $188.19 per share to $189.19 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000079 · wk-form4_1778530178.xml · nonDerivative · entry 5

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 942,318

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F7 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $187.18 per share to $188.165 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000079 · wk-form4_1778530178.xml · nonDerivative · entry 4

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 942,721

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F6 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $189.76 per share to $190.715 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000079 · wk-form4_1778530178.xml · nonDerivative · entry 3

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 945,608

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F5 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $188.75 per share to $189.75 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000079 · wk-form4_1778530178.xml · nonDerivative · entry 2

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 948,100

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F4 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $187.73 per share to $188.725 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000079 · wk-form4_1778530178.xml · nonDerivative · entry 1

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 949,736

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F2 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $186.725 per share to $187.72 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote and in footnotes 4 through 9.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000065 · wk-form4_1775678792.xml · nonDerivative · entry 7

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 950,578

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F9 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $198.19 per share to $199.11 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000065 · wk-form4_1775678792.xml · nonDerivative · entry 6

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 951,832

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F8 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $197.19 per share to $198.18 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000065 · wk-form4_1775678792.xml · nonDerivative · entry 5

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 954,180

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F7 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $196.19 per share to $197.185 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000065 · wk-form4_1775678792.xml · nonDerivative · entry 4

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 956,550

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F6 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $195.18 per share to $196.14 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000065 · wk-form4_1775678792.xml · nonDerivative · entry 3

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 958,435

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F5 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $195.00 per share to $195.48 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000065 · wk-form4_1775678792.xml · nonDerivative · entry 2

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 958,620

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F4 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $193.72 per share to $194.695 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000065 · wk-form4_1775678792.xml · nonDerivative · entry 1

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 963,976

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Mr. Meloy on August 13, 2025.

F2 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $192.68 per share to $193.64 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote and in footnotes 4 through 9.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000062 · wk-form4_1774383055.xml · nonDerivative · entry 1

Wesson Daniel N · CIK 0001805429 · Exec. VP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,289

F1 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $191.9301 per share to $192.111 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001539838-26-000061 · wk-form4_1774383051.xml · nonDerivative · entry 1

Dick Teresa L. · CIK 0001559931 · CAO, Exec. VP, Assist. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,755

SEC source: 0001539838-26-000058 · wk-form4_1773963218.xml · nonDerivative · entry 1

WEST STEVEN E · CIK 0001190898 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,484

F1 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $187.95 per share to $188.69 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2 · balance_after: Reflects the transfer of 3,068 shares of Common Stock in a transfer exempt from reporting pursuant to Rule 16a-12.

SEC source: 0001539838-26-000056 · wk-form4_1773956270.xml · nonDerivative · entry 1

Zmigrosky Matt · CIK 0001767328 · EVP, Chief Legal and Admin Off

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,392

F1 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $190.48 per share to $190.68 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001539838-26-000055 · wk-form4_1773956262.xml · nonDerivative · entry 1

Dick Teresa L. · CIK 0001559931 · CAO, Exec. VP, Assist. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,755

SEC source: 0001539838-26-000051 · wk-form4_1773777699.xml · nonDerivative · entry 1

Thompson Jere W III · CIK 0002012978 · CFO, Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,975

SEC source: 0001539838-26-000050 · wk-form4_1773777691.xml · nonDerivative · entry 1

Barkmann Albert · CIK 0002012976 · Exec. VP and Chief Engineer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,571

SEC source: 0001539838-26-000052 · wk-form4_1773777704.xml · nonDerivative · entry 1

Zmigrosky Matt · CIK 0001767328 · EVP, Chief Legal and Admin Off

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,493

F1 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $180.00 per share to $180.085 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001140361-26-009622 · form4.xml · nonDerivative · entry 1

SGF FANG Holdings, LP · CIK 0002080063 · 10% owner

Greth Lyndal · CIK 0002021141 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,036,722

F1 · kind: On March 12, 2026, SGF FANG Holdings, LP, a Delaware limited partnership, sold 12,650,000 shares of common stock of Diamondback Energy, Inc. (the "Company"), par value $0.01 per share (the "Common Stock"), in an underwritten public offering pursuant to the Company's Registration Statement on Form S-3 (File No. 333-282225).

F2 · price: The actual sale price was $170.18875. The price reported in Table I, Column 4 has been rounded to $170.1888 because the EDGAR filing system does not accommodate a fifth decimal place.

F3 · balance_after: Reduced by 5 shares to correct an administrative error in previous reporting of common stock held.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 13

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 966,292

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F15 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $181.695 per share to $182.515 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 12

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 967,747

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F14 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $180.69 per share to $181.655 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 11

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 969,076

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F13 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $179.615 per share to $180.57 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 10

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 970,151

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F12 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $178.57 per share to $179.53 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 9

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 971,897

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F11 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $177.54 per share to $178.525 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 8

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 973,583

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $176.505 per share to $177.42 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000040 · wk-form4_1773173316.xml · nonDerivative · entry 2

Dick Teresa L. · CIK 0001559931 · CAO, Exec. VP, Assist. Sec.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 112,755

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 7

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 974,149

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $186.05 per share to $186.31 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 6

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 974,257

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $185.015 per share to $186.005 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 5

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 974,719

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $184.010 per share to $184.945 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 4

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 976,184

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $183.00 per share to $183.99 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 3

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 979,060

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F5 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $181.975 per share to $182.970 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 2

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 980,909

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F4 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $180.975 per share to $181.970 per share, inclusive.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000046 · wk-form4_1773259884.xml · nonDerivative · entry 1

Meloy Charles Alvin · CIK 0001333454 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · Wolfrock Energy, LLC

Disclosed balance after: 981,618

F1 · shares: The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $179.915 per share to $180.805 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote and in footnotes 4 through 15.

F3 · ownership.direct: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

F3 · ownership.nature: These securities are held directly by Wolfrock Energy, LLC, a Texas limited liability company whose sole member is CS Ventures, Ltd. CS Ventures, Ltd. is controlled by its general partner, Meloy Management, LLC, which is controlled by the Reporting Person.

SEC source: 0001539838-26-000031 · wk-form4_1772578310.xml · nonDerivative · entry 9

Wesson Daniel N · CIK 0001805429 · Exec. VP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 103,289

F9 · shares: The issuer withheld shares of common stock that would have otherwise been issuable to the reporting person to satisfy the issuer's tax withholding obligations in connection with the vesting and settlement on March 1, 2026 of the second tranche of the time-based restricted stock units granted to the reporting person on March 1, 2019. The number of shares of common stock withheld was determined based on the closing price per share of the issuer's common stock on February 27, 2026.

SEC source: 0001539838-26-000044 · wk-form4_1773173350.xml · nonDerivative · entry 1

Thompson Jere W III · CIK 0002012978 · CFO, Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,725

SEC source: 0001539838-26-000043 · wk-form4_1773173344.xml · nonDerivative · entry 2

Wesson Daniel N · CIK 0001805429 · Exec. VP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,289

SEC source: 0001539838-26-000043 · wk-form4_1773173344.xml · nonDerivative · entry 1

Wesson Daniel N · CIK 0001805429 · Exec. VP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,489

F1 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $180.745 per share to $181.53 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001539838-26-000042 · wk-form4_1773173335.xml · nonDerivative · entry 4

Stice Travis D. · CIK 0001559933 · Director · Executive Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 123,745

F5 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $181.57 per share to $181.785 per share, inclusive.

SEC source: 0001539838-26-000042 · wk-form4_1773173335.xml · nonDerivative · entry 3

Stice Travis D. · CIK 0001559933 · Director · Executive Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 124,718

F4 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $180.57 per share to $181.56 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote and in footnote 5.

SEC source: 0001539838-26-000042 · wk-form4_1773173335.xml · nonDerivative · entry 2

Stice Travis D. · CIK 0001559933 · Director · Executive Chairman

10b5-1 filing: No plan indicated

Ownership: Indirect · By Stice Investments, Ltd.

Disclosed balance after: 305,314

F3 · price: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $181.60 per share to $181.77 per share, inclusive.

F2 · ownership.direct: These securities are held by Stice Investments, Ltd., which is managed by Stice Management, LLC, its general partner. Mr. Stice and his spouse hold 100% of the membership interests in Stice Management, LLC, of which Mr. Stice is the manager.

F2 · ownership.nature: These securities are held by Stice Investments, Ltd., which is managed by Stice Management, LLC, its general partner. Mr. Stice and his spouse hold 100% of the membership interests in Stice Management, LLC, of which Mr. Stice is the manager.