NBR · Nabors Industries Ltd

The restricted stock award is scheduled to vest on the first anniversary of the grant date.

The restricted stock award is scheduled to vest on the first anniversary of the grant date.

The restricted stock award is scheduled to vest on the first anniversary of the grant date.

The restricted stock award is scheduled to vest on the first anniversary of the grant date.

The restricted stock award is scheduled to vest on the first anniversary of the grant date.

The restricted stock award is scheduled to vest on the first anniversary of the grant date.

The restricted stock award is scheduled to vest on the first anniversary of the grant date.

The price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions at prices ranging from $77.97 to $78.24. The reporting person undertakes to provide the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased as each separate price within the ranges set forth in this footnote.

Reflects the number of shares surrendered to satisfy the tax withholding on the vesting of 663 shares of restricted stock on February 19, 2026. The remaining shares were retained by the executive.

Reflects the number of shares surrendered to satisfy the tax withholding on the vesting of 1,287 shares of restricted stock on February 18, 2026. The remaining shares were retained by the executive.

Reflects the number of shares surrendered to satisfy the tax withholding on the vesting of 603 shares of restricted stock on February 15, 2026. The remaining shares were retained by the executive.

Reflects the number of shares surrendered to satisfy the tax withholding on the vesting of 567 shares of restricted stock on February 15, 2026. The remaining shares were retained by the executive.

Reflects the number of shares surrendered to satisfy the tax withholding on the vesting of 686 shares of restricted stock on February 11, 2026. The remaining shares were retained by the executive.

The restricted stock award is scheduled to vest in four (4) equal annual installments beginning on the first anniversary of the date of the award.

The restricted stock award is scheduled to vest in four (4) equal annual installments beginning on the first anniversary of the date of the award.

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. 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.

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.

Reflects the number of shares surrendered on January 1, 2026 to satisfy the tax withholding on the vesting and issuance of 2,736 shares of the 2023 Long Term Performance restricted stock units originally granted on May 18, 2023. The remaining 1,924 vested performance shares were retained by the Reporting Person.

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.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

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.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

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.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

Reflects the number of shares vesting on January 1, 2026 in respect of the 17,105 earned and vested Performance restricted stock units originally granted on January 1, 2025.

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.

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 for a 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.

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.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

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 vesting on January 1, 2026 in respect of the 15,048 earned and vested Performance restricted stock units originally granted on January 1, 2023.

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.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

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.

The Reporting Person was granted a restricted stock award on January 1, 2026 in connection with his appointment as Chief Financial Officer on October 1, 2025, that will cliff vest in full on January 1, 2030.

Reflects the number of shares surrendered on January 1, 2026 to satisfy the tax withholding on the vesting and issuance of 17,105 shares of the 17,105 Performance restricted stock units originally granted on January 1, 2025. The remaining 12,762 vested performance shares were retained by Mr. Restrepo.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

These Performance restricted stock units were earned by Mr. Restrepo pursuant to his employment agreement and the terms therein upon his qualifying retirement on October 1, 2025 as Chief Financial Officer, based on the achievement of certain objectives for the year 2025, as determined on December 31, 2025, by the Compensation Committee. 185.78% of the target number of performance restricted stock units granted pursuant to the terms of Mr. Restrepo's employment agreement were determined to have been earned, subject to proration to reflect the partial year of employment. The number reported above reflects the number of earned performance restricted stock units, prorated through September 30, 2025, that are payable in share-settled restricted stock units. The Performance restricted stock units that settle in shares are scheduled to fully vest, in accordance with Mr. Restrepo's employment agreement, on the first anniversary of the date of grant, January 1, 2026.

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.

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 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.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

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 vesting on January 1, 2026 in respect of the 17,105 earned and vested Performance restricted stock units originally granted on January 1, 2025.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

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.

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.

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.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

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.

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.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

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.

Represents the number of TSR shares forfeited on December 31, 2025, out of a total of 1,582 TSR shares originally granted to the Reporting Person on February 14, 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").

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").

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.

The reporting person was granted a restricted stock award on October 1, 2025 in connection with his appointment as Chief Financial Officer, that vest in three equal annual installments beginning on October 1, 2026.

Performance restricted stock units convert into common shares on a 1-for-1 basis.

Mr. Restrepo retired on September 30, 2025. Pursuant to the Executive's employment agreement, upon a qualifying retirement, all unvested performance stock units ("PSUs") held by the reporting person vested in full on the retirement date.

Reflects the vesting of 1,075 PSUs on September 30, 2025 in connection with Mr. Restrepo's retirement in accordance with his employment agreement, which represents the number of PSUs that were earned in respect of the 3,225 PSUs originally granted on January 1, 2023, which 1,075 PSUs remained subject to time-vesting requirements

Performance restricted stock units convert into common shares on a 1-for-1 basis.

Mr. Restrepo retired on September 30, 2025. Pursuant to the Executive's employment agreement, upon a qualifying retirement, all unvested performance stock units ("PSUs") held by the reporting person vested in full on the retirement date.

Reflects the vesting of 11,698 PSUs on September 30, 2025 in connection with Mr. Restrepo's retirement in accordance with his employment agreement, which represents the number of PSUs that were earned in respect of the 17,547 PSUs originally granted on January 1, 2024, which 11,698 PSUs remained subject to time-vesting requirements.