PTEN

SEC source: 0001209191-24-000572 · doc4.xml · nonDerivative · entry 1

Nelson Amy H · CIK 0001599571 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,641

F1 · shares: Restricted stock units that convert into common stock on a one-for-one basis. One hundred percent (100%) of the restricted stock units vests on January 1, 2025.

SEC source: 0001209191-24-000570 · doc4.xml · nonDerivative · entry 1

Judah Janeen S · CIK 0001736570 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,868

F1 · shares: Restricted stock units that convert into common stock on a one-for-one basis. One hundred percent (100%) of the restricted stock units vests on January 1, 2025.

SEC source: 0001209191-24-000568 · doc4.xml · nonDerivative · entry 1

Jaime Cesar · CIK 0001919699 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,635

F1 · shares: Restricted stock units that convert into common stock on a one-for-one basis. One hundred percent (100%) of the restricted stock units vests on January 1, 2025.

SEC source: 0001209191-24-000566 · doc4.xml · nonDerivative · entry 1

HUFF CURTIS W · CIK 0001250127 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 380,281

F1 · shares: Restricted stock units that convert into common stock on a one-for-one basis. One hundred percent (100%) of the restricted stock units vests on January 1, 2025.

SEC source: 0001209191-24-000565 · doc4.xml · nonDerivative · entry 1

Halverson Gary M. · CIK 0001504164 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,785

F1 · shares: Restricted stock units that convert into common stock on a one-for-one basis. One hundred percent (100%) of the restricted stock units vests on January 1, 2025.

SEC source: 0001209191-24-000563 · doc4.xml · nonDerivative · entry 1

Drummond Robert Wayne Jr · CIK 0001645511 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,661,155

F1 · shares: Restricted stock units that convert into common stock on a one-for-one basis. One hundred percent (100%) of the restricted stock units vests on January 1, 2025.

SEC source: 0001209191-24-000559 · doc4.xml · nonDerivative · entry 1

Beyer Leslie Ann · CIK 0001815528 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,934

F1 · shares: Restricted stock units that convert into common stock on a one-for-one basis. One hundred percent (100%) of the restricted stock units vests on January 1, 2025.

SEC source: 0001209191-24-000561 · doc4.xml · nonDerivative · entry 1

CEPAK TIFFANY THOM · CIK 0001468952 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 123,284

F1 · shares: Restricted stock units that convert into common stock on a one-for-one basis. One hundred percent (100%) of the restricted stock units vests on January 1, 2025, with settlement generally deferred until the director's separation from service.

SEC source: 0001209191-23-057515 · doc4.xml · nonDerivative · entry 1

CEPAK TIFFANY THOM · CIK 0001468952 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,081

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $11.78 to $11.80, inclusive. The Reporting Person undertakes to provide to Patterson-UTI Energy, Inc., any security holder of Patterson-UTI 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: 0001209191-23-051263 · doc4.xml · derivative · entry 6

Drummond Robert Wayne Jr · CIK 0001645511 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, $.01 par value per share · 510,185 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Reflects the settlement of cash-settled restricted stock units that, as previously reported, fully vested on September 1, 2023.

F3 · price: Reflects the settlement of cash-settled restricted stock units that, as previously reported, fully vested on September 1, 2023.

F3 · derivative.exercise_date: Reflects the settlement of cash-settled restricted stock units that, as previously reported, fully vested on September 1, 2023.

F3 · derivative.expiration_date: Reflects the settlement of cash-settled restricted stock units that, as previously reported, fully vested on September 1, 2023.

SEC source: 0001209191-23-051263 · doc4.xml · derivative · entry 5

Drummond Robert Wayne Jr · CIK 0001645511 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, $.01 par value per share · 3,051,766 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Reflects the settlement of restricted stock units that, as previously reported, fully vested on September 1, 2023.

F1 · price: Reflects the settlement of restricted stock units that, as previously reported, fully vested on September 1, 2023.

F1 · derivative.exercise_date: Reflects the settlement of restricted stock units that, as previously reported, fully vested on September 1, 2023.

F1 · derivative.expiration_date: Reflects the settlement of restricted stock units that, as previously reported, fully vested on September 1, 2023.

SEC source: 0001209191-23-051263 · doc4.xml · nonDerivative · entry 4

Drummond Robert Wayne Jr · CIK 0001645511 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,644,952

F4 · shares: No shares were actually issued, disposed or sold. Under applicable SEC guidance, cash settlement of restricted stock units is deemed to involve the conversion of the cash-settled restricted stock units into the underlying common stock and the simultaneous disposition of the common stock to the Company for cash. Accordingly, Table 1 uses Transaction Code D to report the cash-settled restricted stock unit settlement.

SEC source: 0001209191-23-051263 · doc4.xml · nonDerivative · entry 3

Drummond Robert Wayne Jr · CIK 0001645511 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,155,137

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · price: Reflects the settlement of cash-settled restricted stock units that, as previously reported, fully vested on September 1, 2023.

SEC source: 0001209191-23-051263 · doc4.xml · nonDerivative · entry 2

Drummond Robert Wayne Jr · CIK 0001645511 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,644,952

F2 · shares: Shares disposed to pay applicable withholding taxes on restricted stock units converted into common stock on September 28, 2023.

SEC source: 0001209191-23-051263 · doc4.xml · nonDerivative · entry 1

Drummond Robert Wayne Jr · CIK 0001645511 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,000,411

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Reflects the settlement of restricted stock units that, as previously reported, fully vested on September 1, 2023.

SEC source: 0001209191-23-050877 · doc4.xml · nonDerivative · entry 1

Smith Charles Andrew · CIK 0001453799 · EVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 504,413

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.10 to $15.11, inclusive. The Reporting Person undertakes to provide to Patterson-UTI Energy, Inc., any security holder of Patterson-UTI 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: 0001209191-23-050325 · doc4.xml · nonDerivative · entry 1

Smith Charles Andrew · CIK 0001453799 · EVP & Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 514,413

SEC source: 0001209191-23-049624 · doc4.xml · nonDerivative · entry 1

Wexler Seth David · CIK 0001469527 · SVP/General Counsel/Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 340,418

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.98 to $15.99, inclusive. The Reporting Person undertakes to provide to Patterson-UTI Energy, Inc., any security holder of Patterson-UTI 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: 0001209191-23-049787 · doc4.xml · nonDerivative · entry 1

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By JCS Partners LP

Disclosed balance after: 1,277,254

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.79 to $16.14, inclusive. The Reporting Person undertakes to provide to Patterson-UTI Energy, Inc., any security holder of Patterson-UTI 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 · ownership.nature: Held by JCS Partners LP, a limited partnership over which the reporting person exercises ownership and control.

SEC source: 0001209191-23-049625 · doc4.xml · nonDerivative · entry 1

Holcomb James Michael · CIK 0001538623 · Chief Business Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 376,109

F1 · shares: The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 22, 2023.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.95 to $15.96, inclusive. The Reporting Person undertakes to provide to Patterson-UTI Energy, Inc., any security holder of Patterson-UTI 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: 0001209191-23-048525 · doc4.xml · derivative · entry 3

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,092

Underlying: Common Stock, $.01 par value per share · 23,092 shares

Expires 2024-03-01

F4 · price: These fully vested stock options were acquired by the Reporting Person in the Mergers in exchange for stock options to purchase shares of common stock of NexTier for $14.17 per share held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio.

SEC source: 0001209191-23-048525 · doc4.xml · derivative · entry 2

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,682

Underlying: Common Stock, $.01 par value per share · 134,682 shares

Expires 2024-03-01

F3 · price: These fully vested stock options were acquired by the Reporting Person in the Mergers in exchange for stock options to purchase shares of common stock of NexTier for $15.63 per share held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio.

SEC source: 0001209191-23-048525 · doc4.xml · nonDerivative · entry 1

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,435,989

F1 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 (the "Exchange Ratio") shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

F2 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

SEC source: 0001209191-23-048524 · doc4.xml · nonDerivative · entry 1

Nelson Amy H · CIK 0001599571 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 125,438

F1 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

F2 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

SEC source: 0001209191-23-048522 · doc4.xml · nonDerivative · entry 1

Halverson Gary M. · CIK 0001504164 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 130,582

F1 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

F2 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

SEC source: 0001209191-23-048521 · doc4.xml · derivative · entry 3

Gillard Matthew · CIK 0001878197 · President-Completions

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 244,889

Underlying: Common Stock, $.01 par value per share · 244,889 shares

Expires not disclosed

F4 · derivative.exercise_price: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs will fully vest on December 31, 2024. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock on the settlement date.

F4 · price: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs will fully vest on December 31, 2024. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock on the settlement date.

F4 · derivative.exercise_date: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs will fully vest on December 31, 2024. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock on the settlement date.

F4 · derivative.expiration_date: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs will fully vest on December 31, 2024. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock on the settlement date.

SEC source: 0001209191-23-048521 · doc4.xml · derivative · entry 2

Gillard Matthew · CIK 0001878197 · President-Completions

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 270,468

Underlying: Common Stock, $.01 par value per share · 270,468 shares

Expires not disclosed

F3 · derivative.exercise_price: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs will vest in accordance with the following schedule: (i) 18,681 on January 2, 2024, (ii) 40,406 on January 3, 2024, (iii) 24,816 on August 16, 2024, (iv) 18,132 on January 2, 2025, (v) 40,407 on January 3, 2025, (vi) 109,894 on December 31, 2025 and (vii) 18,132 on January 2, 2026. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

F3 · price: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs will vest in accordance with the following schedule: (i) 18,681 on January 2, 2024, (ii) 40,406 on January 3, 2024, (iii) 24,816 on August 16, 2024, (iv) 18,132 on January 2, 2025, (v) 40,407 on January 3, 2025, (vi) 109,894 on December 31, 2025 and (vii) 18,132 on January 2, 2026. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

F3 · derivative.exercise_date: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs will vest in accordance with the following schedule: (i) 18,681 on January 2, 2024, (ii) 40,406 on January 3, 2024, (iii) 24,816 on August 16, 2024, (iv) 18,132 on January 2, 2025, (v) 40,407 on January 3, 2025, (vi) 109,894 on December 31, 2025 and (vii) 18,132 on January 2, 2026. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

F3 · derivative.expiration_date: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs will vest in accordance with the following schedule: (i) 18,681 on January 2, 2024, (ii) 40,406 on January 3, 2024, (iii) 24,816 on August 16, 2024, (iv) 18,132 on January 2, 2025, (v) 40,407 on January 3, 2025, (vi) 109,894 on December 31, 2025 and (vii) 18,132 on January 2, 2026. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

SEC source: 0001209191-23-048521 · doc4.xml · nonDerivative · entry 1

Gillard Matthew · CIK 0001878197 · President-Completions

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,058

F1 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 (the "Exchange Ratio") shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

F2 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

SEC source: 0001209191-23-048519 · doc4.xml · derivative · entry 3

Drummond Robert Wayne Jr · CIK 0001645511 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 510,185

Underlying: Common Stock, $.01 par value per share · 510,185 shares

Expires not disclosed

F4 · derivative.exercise_price: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs fully vested on September 1, 2023, in connection with the Reporting Person's termination of employment with NexTier. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock.

F4 · price: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs fully vested on September 1, 2023, in connection with the Reporting Person's termination of employment with NexTier. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock.

F4 · derivative.exercise_date: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs fully vested on September 1, 2023, in connection with the Reporting Person's termination of employment with NexTier. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock.

F4 · derivative.expiration_date: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs fully vested on September 1, 2023, in connection with the Reporting Person's termination of employment with NexTier. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock.

SEC source: 0001209191-23-048519 · doc4.xml · derivative · entry 2

Drummond Robert Wayne Jr · CIK 0001645511 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,051,766

Underlying: Common Stock, $.01 par value per share · 3,051,766 shares

Expires not disclosed

F3 · derivative.exercise_price: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs fully vested on September 1, 2023, in connection with the Reporting Person's termination of employment with NexTier. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

F3 · price: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs fully vested on September 1, 2023, in connection with the Reporting Person's termination of employment with NexTier. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

F3 · derivative.exercise_date: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs fully vested on September 1, 2023, in connection with the Reporting Person's termination of employment with NexTier. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

F3 · derivative.expiration_date: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs fully vested on September 1, 2023, in connection with the Reporting Person's termination of employment with NexTier. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

SEC source: 0001209191-23-048519 · doc4.xml · nonDerivative · entry 1

Drummond Robert Wayne Jr · CIK 0001645511 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 948,645

F1 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 (the "Exchange Ratio") shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

F2 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

SEC source: 0001209191-23-048518 · doc4.xml · nonDerivative · entry 1

Beyer Leslie Ann · CIK 0001815528 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,731

F1 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

F2 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

SEC source: 0001209191-23-049784 · doc4a.xml · derivative · entry 4

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,092

Underlying: Common Stock, $.01 par value per share · 23,092 shares

Expires 2024-03-01

F5 · price: These fully vested stock options were acquired by the Reporting Person in the Mergers in exchange for stock options to purchase shares of common stock of NexTier for $14.17 per share held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio.

SEC source: 0001209191-23-049784 · doc4a.xml · derivative · entry 3

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,682

Underlying: Common Stock, $.01 par value per share · 134,682 shares

Expires 2024-03-01

F4 · price: These fully vested stock options were acquired by the Reporting Person in the Mergers in exchange for stock options to purchase shares of common stock of NexTier for $15.63 per share held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio.

SEC source: 0001209191-23-049784 · doc4a.xml · nonDerivative · entry 2

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By JCS Partners LP

Disclosed balance after: 1,339,754

F1 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 (the "Exchange Ratio") shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

F2 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

F3 · ownership.nature: Held by JCS Partners LP, a limited partnership over which the reporting person exercises ownership and control.

SEC source: 0001209191-23-049784 · doc4a.xml · nonDerivative · entry 1

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,235

F1 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 (the "Exchange Ratio") shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

F2 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

SEC source: 0001209191-24-004214 · doc4a.xml · derivative · entry 3

Gillard Matthew · CIK 0001878197 · President-Completions

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 244,889

Underlying: Common Stock, $.01 par value per share · 244,889 shares

Expires not disclosed

F5 · derivative.exercise_price: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs will fully vest on December 31, 2024. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock on the settlement date.

F5 · price: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs will fully vest on December 31, 2024. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock on the settlement date.

F5 · derivative.exercise_date: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs will fully vest on December 31, 2024. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock on the settlement date.

F5 · derivative.expiration_date: These cash-settled restricted stock units ("Cash-Settled RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier performance units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The Cash-Settled RSUs will fully vest on December 31, 2024. Each Cash-Settled RSU represents the right to receive a cash payment equal to the fair market value of a share of the Issuer's common stock on the settlement date.

SEC source: 0001209191-24-004214 · doc4a.xml · derivative · entry 2

Gillard Matthew · CIK 0001878197 · President-Completions

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 270,470

Underlying: Common Stock, $.01 par value per share · 270,470 shares

Expires not disclosed

F3 · derivative.exercise_price: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported an incorrect number of restricted stock units acquired in the Mergers due to immaterial rounding errors. These items have been corrected in this amendment, which reports 2 additional restricted stock units.

F4 · derivative.exercise_price: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs will vest in accordance with the following schedule: (i) 18,682 on January 2, 2024, (ii) 40,406 on January 3, 2024, (iii) 24,816 on August 16, 2024, (iv) 18,133 on January 2, 2025, (v) 40,407 on January 3, 2025, (vi) 109,894 on December 31, 2025 and (vii) 18,132 on January 2, 2026. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

F3 · shares: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported an incorrect number of restricted stock units acquired in the Mergers due to immaterial rounding errors. These items have been corrected in this amendment, which reports 2 additional restricted stock units.

F4 · price: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs will vest in accordance with the following schedule: (i) 18,682 on January 2, 2024, (ii) 40,406 on January 3, 2024, (iii) 24,816 on August 16, 2024, (iv) 18,133 on January 2, 2025, (v) 40,407 on January 3, 2025, (vi) 109,894 on December 31, 2025 and (vii) 18,132 on January 2, 2026. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

F4 · derivative.exercise_date: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs will vest in accordance with the following schedule: (i) 18,682 on January 2, 2024, (ii) 40,406 on January 3, 2024, (iii) 24,816 on August 16, 2024, (iv) 18,133 on January 2, 2025, (v) 40,407 on January 3, 2025, (vi) 109,894 on December 31, 2025 and (vii) 18,132 on January 2, 2026. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

F4 · derivative.expiration_date: These restricted stock units ("RSUs") were acquired by the Reporting Person in the Mergers in exchange for NexTier restricted stock units and performance stock units held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio. The RSUs will vest in accordance with the following schedule: (i) 18,682 on January 2, 2024, (ii) 40,406 on January 3, 2024, (iii) 24,816 on August 16, 2024, (iv) 18,133 on January 2, 2025, (v) 40,407 on January 3, 2025, (vi) 109,894 on December 31, 2025 and (vii) 18,132 on January 2, 2026. Each RSU represents the right to receive a share of the Issuer's common stock or a cash payment in lieu thereof.

F3 · derivative.underlying_shares: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported an incorrect number of restricted stock units acquired in the Mergers due to immaterial rounding errors. These items have been corrected in this amendment, which reports 2 additional restricted stock units.

F3 · balance_after: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported an incorrect number of restricted stock units acquired in the Mergers due to immaterial rounding errors. These items have been corrected in this amendment, which reports 2 additional restricted stock units.

SEC source: 0001209191-24-004214 · doc4a.xml · nonDerivative · entry 1

Gillard Matthew · CIK 0001878197 · President-Completions

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,058

F1 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 (the "Exchange Ratio") shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

F2 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

SEC source: 0001209191-24-004212 · doc4a.xml · derivative · entry 4

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,093

Underlying: Common Stock, $.01 par value per share · 23,093 shares

Expires 2024-08-06

F4 · shares: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported incorrect numbers of stock options acquired in the Mergers due to immaterial rounding errors and misstated the expiration date of certain stock options. These items have been corrected in this amendment, which reports 2 additional stock options.

F6 · price: These fully vested stock options were acquired by the Reporting Person in the Mergers in exchange for stock options to purchase shares of common stock of NexTier for $14.17 per share held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio.

F4 · derivative.expiration_date: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported incorrect numbers of stock options acquired in the Mergers due to immaterial rounding errors and misstated the expiration date of certain stock options. These items have been corrected in this amendment, which reports 2 additional stock options.

F4 · derivative.underlying_shares: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported incorrect numbers of stock options acquired in the Mergers due to immaterial rounding errors and misstated the expiration date of certain stock options. These items have been corrected in this amendment, which reports 2 additional stock options.

F4 · balance_after: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported incorrect numbers of stock options acquired in the Mergers due to immaterial rounding errors and misstated the expiration date of certain stock options. These items have been corrected in this amendment, which reports 2 additional stock options.

SEC source: 0001209191-24-004212 · doc4a.xml · derivative · entry 3

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,683

Underlying: Common Stock, $.01 par value per share · 134,683 shares

Expires 2024-03-01

F4 · shares: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported incorrect numbers of stock options acquired in the Mergers due to immaterial rounding errors and misstated the expiration date of certain stock options. These items have been corrected in this amendment, which reports 2 additional stock options.

F5 · price: These fully vested stock options were acquired by the Reporting Person in the Mergers in exchange for stock options to purchase shares of common stock of NexTier for $15.63 per share held by the Reporting Person immediately prior to the Effective Time based on the Exchange Ratio.

F4 · derivative.underlying_shares: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported incorrect numbers of stock options acquired in the Mergers due to immaterial rounding errors and misstated the expiration date of certain stock options. These items have been corrected in this amendment, which reports 2 additional stock options.

F4 · balance_after: On September 6, 2023, the Reporting Person filed a Form 4 which inadvertently reported incorrect numbers of stock options acquired in the Mergers due to immaterial rounding errors and misstated the expiration date of certain stock options. These items have been corrected in this amendment, which reports 2 additional stock options.

SEC source: 0001209191-24-004212 · doc4a.xml · nonDerivative · entry 2

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By JCS Partners LP

Disclosed balance after: 1,339,754

F1 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

F2 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 (the "Exchange Ratio") shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

F3 · ownership.nature: Held by JCS Partners LP, a limited partnership over which the reporting person exercises ownership and control.

SEC source: 0001209191-24-004212 · doc4a.xml · nonDerivative · entry 1

STEWART JAMES CARL · CIK 0001702981 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,235

F1 · price: The shares of the Issuer's common stock reported above were acquired by the Reporting Person in respect of the shares of common stock of NexTier owned by the Reporting Person immediately prior to the Effective Time. On the trading day immediately prior to the Effective Time, the closing price of the Issuer's common stock was $14.14 per share and the closing price of NexTier's common stock was $10.61 per share.

F2 · price: This Form 4 reports securities acquired in connection with the mergers (the "Mergers") contemplated by that certain Agreement and Plan of Merger (as amended, the "Merger Agreement"), dated as of June 14, 2023, by and among Patterson-UTI Energy, Inc. (the "Issuer"), certain subsidiaries of the Issuer, and NexTier Oilfield Solutions Inc. ("NexTier"). On September 1, 2023, as a result of the Mergers contemplated by the Merger Agreement, at the Effective Time (as defined in the Merger Agreement), each outstanding share of common stock of NexTier was converted automatically into the right to receive 0.7520 (the "Exchange Ratio") shares of common stock of the Issuer, with cash paid in lieu of the issuance of any fractional shares of the Issuer's common stock.

SEC source: 0001209191-23-043544 · doc4.xml · nonDerivative · entry 1

Holcomb James Michael · CIK 0001538623 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 387,925

F1 · shares: The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 22, 2023.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $15.45 to $15.49, inclusive. The Reporting Person undertakes to provide to Patterson-UTI Energy, Inc., any security holder of Patterson-UTI 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: 0001209191-23-042761 · doc4.xml · nonDerivative · entry 2

Holcomb James Michael · CIK 0001538623 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 396,727

F1 · shares: The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 22, 2023.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $14.95 to $14.98, inclusive. The Reporting Person undertakes to provide to Patterson-UTI Energy, Inc., any security holder of Patterson-UTI 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: 0001209191-23-042760 · doc4.xml · nonDerivative · entry 1

Hendricks William Andrew JR · CIK 0001546374 · Director · President & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,886,874

F1 · shares: The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 7, 2023.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $14.75 to $14.92, inclusive. The Reporting Person undertakes to provide to Patterson-UTI Energy, Inc., any security holder of Patterson-UTI 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: 0001209191-23-042761 · doc4.xml · nonDerivative · entry 1

Holcomb James Michael · CIK 0001538623 · Chief Operating Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 402,631

F1 · shares: The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 22, 2023.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $14.45 to $14.50, inclusive. The Reporting Person undertakes to provide to Patterson-UTI Energy, Inc., any security holder of Patterson-UTI 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: 0001209191-23-042404 · doc4.xml · nonDerivative · entry 1

Hendricks William Andrew JR · CIK 0001546374 · Director · President & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,086,874

F1 · shares: The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 7, 2023.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $14.00 to $14.21, inclusive. The Reporting Person undertakes to provide to Patterson-UTI Energy, Inc., any security holder of Patterson-UTI 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: 0001209191-23-028338 · doc4.xml · nonDerivative · entry 3

Wexler Seth David · CIK 0001469527 · SVP/General Counsel/Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 377,918

F3 · shares: Restricted stock units that convert into common stock on a one-for-one basis. One-third of the restricted stock units vests on each of May 5, 2024, May 5, 2025 and May 5, 2026.

SEC source: 0001209191-23-028338 · doc4.xml · nonDerivative · entry 2

Wexler Seth David · CIK 0001469527 · SVP/General Counsel/Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 315,518

F2 · shares: Shares disposed to pay applicable withholding taxes on shares received from the 2020 Performance Unit grant.