X0508 4 2025-12-31 0001163739 NABORS INDUSTRIES LTD NBR 0001195669 PETRELLO ANTHONY G C/O NABORS CORPORATE SERVICES, INC. 515 WEST GREENS ROAD HOUSTON TX 77067 1 1 CHAIRMAN, PRESIDENT & CEO 0 Common Stock 2025-12-31 4 G 0 18000 0 D 294793 I Trust Common Stock 2025-12-31 4 D 0 17843 0 D 74426 D Common Stock 2026-01-01 4 M 0 5016 0 A 79442 D Common Stock 2026-01-01 4 F 0 1974 54.30 D 77468 D Common Stock 2026-01-01 4 M 0 13980 0 A 91448 D Common Stock 2026-01-01 4 F 0 5502 54.30 D 85946 D Common Stock 2026-01-01 4 M 0 19098 0 A 105044 D Common Stock 2026-01-01 4 F 0 7693 54.30 D 97351 D Common Stock 2026-01-01 4 M 0 16420 0 A 113771 D Common Stock 2026-01-01 4 F 0 6462 54.30 D 107309 D Common Stock 2026-01-01 4 A 0 48621 0 A 155930 D 2021 Warrants 166.6666 2021-06-11 2026-06-11 Common Stock 4470 4470 D 2021 Warrants 166.6666 2021-06-11 2026-06-11 Common Stock 170649 170649 I Trust 2023 Performance Share Units 2026-01-01 4 M 0 5016 0 D Common Stock 5016 0 D 2024 Performance Share Units 2026-01-01 4 M 0 13980 0 D Common Stock 13980 13981 D 2025 Performance Share Units 2026-01-01 4 A 0 57293 0 A Common Stock 57293 57293 D 2025 Performance Share Units 2026-01-01 4 M 0 19098 0 D Common Stock 19098 38195 D 2023 Long Term Performance Share Units 2026-01-01 4 A 0 16420 0 A Common Stock 16420 16420 D 2023 Long Term Performance Share Units 2026-01-01 4 M 0 16420 0 D Common Stock 16420 0 D These shares were donated to a charitable foundation for which Mr. Petrello has shared voting and dispositive power. Mr. Petrello disclaims beneficial ownership of the shares held by the charitable foundation. Represents the number of TSR shares forfeited on December 31, 2025, out of a total of 17,843 TSR shares originally granted to Mr. Petrello on January 1, 2023, based on the Issuer's relative total shareholder return as compared to a peer group of companies during the three-year performance period beginning on January 1, 2023 and ending on December 31, 2025, as determined on December 31, 2025, by the Compensation Committee of the Issuer's Board of Directors (the "Compensation Committee"). Reflects the number of shares vesting on January 1, 2026 in respect of the 15,048 earned and vested Performance restricted stock units originally granted on January 1, 2023. Reflects the number of shares surrendered on January 1, 2026 to satisfy the tax withholding on the vesting and issuance of 5,016 shares of the 15,048 Performance restricted stock units originally granted on January 1, 2023. The remaining 3,042 vested performance shares were retained by Mr. Petrello. Reflects the number of shares vesting on January 1, 2026 in respect of the 41,942 earned and vested Performance restricted stock units originally granted on January 1, 2024. Reflects the number of shares surrendered on January 1, 2026 to satisfy the tax withholding on the vesting and issuance of 13,980 shares of the 41,942 Performance restricted stock units originally granted on January 1, 2024. The remaining 8,478 vested performance shares were retained by Mr. Petrello. Reflects the number of shares vesting on January 1, 2026 in respect of the 57,293 earned and vested Performance restricted stock units originally granted on January 1, 2025. Reflects the number of shares surrendered on January 1, 2026 to satisfy the tax withholding on the vesting and issuance of 19,098 shares of the 57,293 Performance restricted stock units originally granted on January 1, 2025. The remaining 11,405 vested performance shares were retained by Mr. Petrello. Represents the aggregate number of Long Term 2023 Performance restricted stock units originally granted on May 18, 2023, the vesting of which was subject to the achievement of certain ROIC performance criteria, that have been earned as a result of the achievement of the applicable performance criteria. All of such shares have fully vested as of January 1, 2026. Reflects the number of shares surrendered on January 1, 2026 to satisfy the tax withholding on the vesting and issuance of 16,420 shares of the 2023 Long Term Performance restricted stock units originally granted on May 18, 2023. The remaining 9,958 vested performance shares were retained by Mr. Petrello. Represents an award of TSR shares that will only vest at the end of a three-year performance period (January 1, 2026 to December 31, 2028) based on the Issuer's relative total shareholder return as compared to a peer group of companies. The number of shares reported represents the maximum that may be earned, which is 200% of the target number. No number of shares is guaranteed to vest and the actual number of shares that will vest at the end of the performance period may be anywhere from zero to the amount stated. Performance restricted stock units convert into common shares on a 1-for-1 basis. These Performance restricted stock units were earned by Mr. Petrello pursuant to his employment agreement based on the achievement of certain objectives for the year 2025, as determined on December 31, 2025, by the Compensation Committee. 191.78% of the target number of performance restricted stock units granted pursuant to the terms of Mr. Petrello's employment agreement were determined to have been earned. The number reported above reflects the number of earned performance restricted stock units that are payable in share-settled restricted stock units. The remaining 52,578 performance restricted stock units were settled in cash pursuant to the terms of the applicable award agreement. The Performance restricted stock units that settle in shares are scheduled to vest in three (3) equal annual installments beginning on the first anniversary of the date of grant, January 1, 2026. On May 18, 2023, the Reporting Person was granted Performance restricted stock units, the vesting of which is subject to the achievement of certain ROIC performance criteria during the three-year performance period beginning on January 1, 2023 and ending on December 31, 2025. The number of shares reported in this line item represents the number of Performance restricted stock units that were earned as a result of the achievement of such performance criteria. /s/ Mark D. Andrews by Power of Attorney for Anthony G. Petrello 2026-01-05