DCO

SEC source: 0001193125-26-357054 · ownership.xml · nonDerivative · entry 3

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 383,864

F1 · price: This transaction was executed in multiple trades at prices ranging from $202.49 to $204.80. 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 prices at which the transaction was effectuated.

SEC source: 0001193125-26-357054 · ownership.xml · derivative · entry 4

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,500

Underlying: Common Stock · 10,000 shares

Expires 2028-05-14

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.

F2 · security: This option represents the right to purchase common stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.

F3 · derivative.exercise_date: This option vested in one-third increments on each of May 14, 2019, 2020 and 2021.

SEC source: 0001193125-26-357054 · ownership.xml · nonDerivative · entry 2

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 386,364

SEC source: 0001193125-26-357054 · ownership.xml · nonDerivative · entry 1

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 392,475

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.

SEC source: 0001193125-26-349759 · ownership.xml · nonDerivative · entry 4

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 382,475

F2 · shares: The number of shares gifted on August 12, 2026 was inadvertently identified as 2,244 shares, which has been corrected above.

SEC source: 0001193125-26-349759 · ownership.xml · nonDerivative · entry 3

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 385,875

F1 · price: This transaction was executed in multiple trades at prices ranging from $200.15 to $202.08. 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 prices at which the transaction was effectuated.

SEC source: 0001193125-26-349516 · ownership.xml · nonDerivative · entry 4

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 383,631

SEC source: 0001193125-26-349516 · ownership.xml · nonDerivative · entry 3

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 385,875

F1 · price: This transaction was executed in multiple trades at prices ranging from $200.15 to $202.08. 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 prices at which the transaction was effectuated.

SEC source: 0001193125-26-349759 · ownership.xml · derivative · entry 5

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,500

Underlying: Common Stock · 15,000 shares

Expires 2028-05-14

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

F4 · derivative.exercise_date: This option vested in one-third increments on each of May 14, 2019, 2020 and 2021.

SEC source: 0001193125-26-349759 · ownership.xml · nonDerivative · entry 2

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 391,641

SEC source: 0001193125-26-349759 · ownership.xml · nonDerivative · entry 1

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 400,875

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.

SEC source: 0001193125-26-349516 · ownership.xml · derivative · entry 5

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,500

Underlying: Common Stock · 15,000 shares

Expires 2028-05-14

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.

F2 · security: This option represents the right to purchase common stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.

F3 · derivative.exercise_date: This option vested in one-third increments on each of May 14, 2019, 2020 and 2021.

SEC source: 0001193125-26-349516 · ownership.xml · nonDerivative · entry 2

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 391,641

SEC source: 0001193125-26-349516 · ownership.xml · nonDerivative · entry 1

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 400,875

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.

SEC source: 0001193125-26-268037 · ownership.xml · nonDerivative · entry 1

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 385,875

SEC source: 0001193125-26-248695 · ownership.xml · nonDerivative · entry 1

Gonzalez Laureen S. · CIK 0001944018 · V.P., CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,172

F1 · shares: 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.

F2 · price: All shares were sold at the exact price indicated. The average sales price calculation is not applicable.

SEC source: 0001193125-26-248674 · ownership.xml · nonDerivative · entry 1

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 387,795

SEC source: 0001193125-26-248650 · ownership.xml · nonDerivative · entry 1

Strycker Samara A · CIK 0001613890 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,700

SEC source: 0001193125-26-248636 · ownership.xml · nonDerivative · entry 1

Kramer Sheila G. · CIK 0001655747 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,700

SEC source: 0001193125-26-248572 · ownership.xml · nonDerivative · entry 1

Korte Daniel G. · CIK 0001603393 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Held in Trust FBO Family

Disclosed balance after: 4,311

SEC source: 0001193125-26-248567 · ownership.xml · nonDerivative · entry 1

Drazba Shirley · CIK 0001756616 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,140

SEC source: 0001193125-26-248555 · ownership.xml · nonDerivative · entry 1

Caylor Mark A · CIK 0001559097 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,200

SEC source: 0001193125-26-248549 · ownership.xml · nonDerivative · entry 1

Carter David B. · CIK 0002009725 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,900

SEC source: 0001193125-26-248537 · ownership.xml · nonDerivative · entry 1

BOEHLE DANIEL L. · CIK 0001730069 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,311

SEC source: 0001193125-26-232902 · ownership.xml · nonDerivative · entry 1

Tata Rajiv A. · CIK 0001801226 · V.P., G.C. & Corp. Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,171

F1 · shares: 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.

F2 · price: All shares were sold at the exact price indicated. The average sales price calculation is not applicable.

SEC source: 0001193125-26-237137 · ownership.xml · nonDerivative · entry 1

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,769

F1 · shares: 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.

F2 · price: All shares were sold at the exact price indicated. The average sales price calculation is not applicable.

SEC source: 0001193125-26-237125 · ownership.xml · nonDerivative · entry 2

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 389,829

F1 · shares: 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.

F1 · price: 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.

SEC source: 0001193125-26-237125 · ownership.xml · nonDerivative · entry 1

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 406,143

SEC source: 0001193125-26-227157 · ownership.xml · derivative · entry 5

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,500 shares

Expires 2029-10-10

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

F4 · derivative.exercise_date: This option vested as to 2,500 shares on each of October 10, 2020, 2021 and 2022.

SEC source: 0001193125-26-227157 · ownership.xml · nonDerivative · entry 4

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,338

SEC source: 0001193125-26-227157 · ownership.xml · nonDerivative · entry 3

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,066

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.

SEC source: 0001193125-26-229316 · ownership.xml · derivative · entry 5

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,500 shares

Expires 2029-10-10

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.

F4 · security: This option represents the right to purchase common stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.

F5 · derivative.exercise_date: This option vested as to 2,500 shares on each of October 10, 2020, 2021 and 2022.

SEC source: 0001193125-26-229316 · ownership.xml · nonDerivative · entry 4

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,283

F3 · shares: 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.

SEC source: 0001193125-26-229316 · ownership.xml · nonDerivative · entry 3

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,066

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.

SEC source: 0001193125-26-227186 · ownership.xml · nonDerivative · entry 2

Tata Rajiv A. · CIK 0001801226 · V.P., G.C. & Corp. Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,783

F2 · shares: 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.

F2 · price: 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.

SEC source: 0001193125-26-227186 · ownership.xml · nonDerivative · entry 1

Tata Rajiv A. · CIK 0001801226 · V.P., G.C. & Corp. Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,341

F1 · shares: 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.

SEC source: 0001193125-26-227174 · ownership.xml · nonDerivative · entry 2

Gonzalez Laureen S. · CIK 0001944018 · V.P., CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,761

F2 · shares: 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.

F2 · price: 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.

SEC source: 0001193125-26-227174 · ownership.xml · nonDerivative · entry 1

Gonzalez Laureen S. · CIK 0001944018 · V.P., CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,087

F1 · shares: 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.

SEC source: 0001193125-26-227157 · ownership.xml · nonDerivative · entry 2

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,566

F2 · shares: 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, 2,498 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 returned to the Issuer in accordance with the Issuer's Clawback Policy.

F2 · price: 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, 2,498 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 returned to the Issuer in accordance with the Issuer's Clawback Policy.

SEC source: 0001193125-26-227157 · ownership.xml · nonDerivative · entry 1

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,825

F1 · shares: 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.

SEC source: 0001193125-26-227123 · ownership.xml · nonDerivative · entry 3

Redondo Jerry L · CIK 0001655127 · S.V.P., Elec. & Struc. Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,034

F3 · shares: 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.

F4 · price: All shares were sold at the exact price indicated. The average sales price calculation is not applicable.

SEC source: 0001193125-26-227123 · ownership.xml · nonDerivative · entry 2

Redondo Jerry L · CIK 0001655127 · S.V.P., Elec. & Struc. Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,716

F2 · shares: 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.

F2 · price: 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.

SEC source: 0001193125-26-227123 · ownership.xml · nonDerivative · entry 1

Redondo Jerry L · CIK 0001655127 · S.V.P., Elec. & Struc. Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,628

F1 · shares: 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.

SEC source: 0001193125-26-227104 · ownership.xml · nonDerivative · entry 2

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 409,843

F2 · shares: 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.

F2 · price: 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.

SEC source: 0001193125-26-227104 · ownership.xml · nonDerivative · entry 1

Oswald Stephen G · CIK 0001695904 · Director · Chairman, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 412,064

F1 · shares: 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.

SEC source: 0001193125-26-229316 · ownership.xml · nonDerivative · entry 2

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,566

F2 · shares: 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.

F2 · price: 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.

SEC source: 0001193125-26-229316 · ownership.xml · nonDerivative · entry 1

Mookerji Suman B. · CIK 0001975924 · Sr. V.P., C.F.O.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,825

F1 · shares: 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.

SEC source: 0001193125-26-219797 · ownership.xml · nonDerivative · entry 2

Gonzalez Laureen S. · CIK 0001944018 · V.P., CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,408

F2 · shares: 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.

F2 · price: 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.

SEC source: 0001193125-26-219797 · ownership.xml · nonDerivative · entry 1

Gonzalez Laureen S. · CIK 0001944018 · V.P., CHRO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,725

F1 · shares: 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.

SEC source: 0001193125-26-219778 · ownership.xml · nonDerivative · entry 2

Redondo Jerry L · CIK 0001655127 · S.V.P., Elec. & Struc. Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,526

F2 · shares: 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.

F2 · price: 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.