DCO · Ducommun Inc /De/

The reported sale was consummated to satisfy the Reporting Person's obligations in connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Current Report on Form 8-K filed on May 1, 2026. In connection with the foregoing, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, the proceeds from the current transaction will be applied to satisfy the Reporting Person's obligations with respect to the Clawback Policy.

All shares were sold at the exact price indicated. The average sales price calculation is not applicable.

The reported sale was consummated to satisfy the Reporting Person's obligations in connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Current Report on Form 8-K filed on May 1, 2026. In connection with the foregoing, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, the proceeds from the current transaction will be applied to satisfy the Reporting Person's obligations with respect to the Clawback Policy.

All shares were sold at the exact price indicated. The average sales price calculation is not applicable.

The reported sale was consummated to satisfy the Reporting Person's obligations in connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Current Report on Form 8-K filed on May 1, 2026. In connection with the foregoing, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, the proceeds from the current transaction will be applied to satisfy the Reporting Person's obligations with respect to the Clawback Policy.

All shares were sold at the exact price indicated. The average sales price calculation is not applicable.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Current Report on Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, 16,314 shares of Issuer common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

This option represents the right to purchase common stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.

This option vested as to 2,500 shares on each of October 10, 2020, 2021 and 2022.

The number of shares withheld to satisfy the tax withholding obligations of the Issuer with respect to the exercise of 7,500 stock options on May 15, 2026 was inadvertently identified as 4,728 shares, which has been corrected above.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, 1,810 restricted stock units that vested on May 14, 2026 were not delivered to the Reporting Person and 912 shares of the Issuer's common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May 14, 2026 of 2,498 restricted stock units.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financialstatements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined basedon the restated financial statements. As a result, 2,498 restricted stock units that vested on May 14, 2026 were not delivered to the Reporting Person and 1,259 shares of the Issuer's common stock were returnedto the Issuer in accordance with the Issuer's Clawback Policy.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May 14, 2026, of 4,406 restricted stock units.

The reported sale was consummated to satisfy the Reporting Person's obligations in connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Current Report on Form 8-K filed on May 1, 2026. In connection with the foregoing, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, the proceeds from the current transaction will be applied to satisfy the Reporting Person's obligations with respect to the Clawback Policy.

All shares were sold at the exact price indicated. The average sales price calculation is not applicable.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, 1,107 restricted stock units that vested on May 14, 2026 were not delivered to the Reporting Person and 558 shares of the Issuer's common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May 14, 2026, of 647 restricted stock units.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May 14, 2026, of 1,810 restricted stock units.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, 647 restricted stock units that vested on May 14, 2026 were not delivered to the Reporting Person and 326 shares of the Issuer's common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, 4,406 restricted stock units that vested on May 14, 2026 were not delivered to the Reporting Person and 2,221 shares of the Issuer's common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May 14, 2026, of 1,107 restricted stock units.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May , 2026 of 2,329 restricted stock units.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, 2,329 restricted stock units that vested on May 8, 2026 were not delivered to the Reporting Person and 1,174 shares of Issuer common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May 8, 2026, of 1,241 restricted stock units.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, 5,135 stock units that vested on May 8, 2026 were not delivered to the Reporting Person and 2,589 shares of the Issuer's common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May 8, 2026, of 5,135 restricted stock units.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May 8, 2026, of 1,507 restricted stock units.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, 1,507 restricted stock units that vested on May 8, 2026 were not delivered to the Reporting Person and 759 shares of Issuer common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, 629 restricted stock units that vested on May 8, 2026 were not delivered to the Reporting Person and 317 shares of Issuer common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May 8, 2026, of 629 restricted stock units.

In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy (the "Clawback Policy") with respect to the restatement and revision of the Issuer's previously issued financial statements, as reported in the Issuer's Form 8-K filed on May 1, 2026, the Issuer determined that the Reporting Person would not have earned certain compensation had such compensation been determined based on the restated financial statements. As a result, 1,241 restricted stock units that vested on May 8, 2026 were not delivered to the Reporting Person and 625 shares of Issuer common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

This transaction was executed in multiple trades at prices ranging from 130.19 to 133.01. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder, full information regarding the number of shares and the prices at which the transaction was effectuated.

This transaction was executed in multiple trades at prices ranging from $130.00 to $132.41. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder, full information regarding the number of shares and the prices at which the transaction was effectuated.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on March 5, 2026, of 668 restricted stock units.

Represents a reduction of shares to satisfy the tax withholding obligations of the Issuer with respect to the vesting, on March 5, 2026, of 2,532 restricted stock units.

This option represents the right to purchase common stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.

This option vested in one-third increments on each of June 17, 2020, 2021 and 2022.

This option represents the right to purchase commun stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.

This option vested in one-third increments on each of June 17, 2020, 2021 and 2022.

Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the vesting, on March 5, 2026, of 4,480 restricted stock units.

This option represents the right to purchase common stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.