Stephen G. Oswald - 04 Mar 2026 Form 4 Insider Report for DUCOMMUN INC /DE/ (DCO)

Role
Chairman, President & CEO, Director
Signature
Stephen G. Oswald
Issuer symbol
DCO
Transactions as of
04 Mar 2026
Net transactions value
$0
Form type
4
Filing time
06 Mar 2026, 16:51:15 UTC
Previous filing
12 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Oswald Stephen G Chairman, President & CEO, Director 600 ANTON BLVD., SUITE 1100, COSTA MESA Stephen G. Oswald 06 Mar 2026 0001695904

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction DCO Common Stock Award +75,503 +20% $0.000000* 451,439 04 Mar 2026 Direct F1, F2, F3
transaction DCO Common Stock Tax liability -40,583 -9% $139.45* 410,856 04 Mar 2026 Direct F4
transaction DCO Common Stock Award +23,649 +5.8% $0.000000* 434,505 04 Mar 2026 Direct F2, F5
transaction DCO Common Stock Tax liability -12,712 -2.9% $139.45* 421,793 04 Mar 2026 Direct F6
transaction DCO Common Stock Tax liability -2,409 -0.57% $130.19* 419,384 05 Mar 2026 Direct F7
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Acquired upon the settlement of performance stock units granted on May 8, 2023 under the Ducommun Incorporated Stock Incentive Plan as a result of the satisfaction of performance metrics underlying the award.
F2 Granted as compensation for services.
F3 The total amount of securities listed includes 279 shares of common stock acquired on January 30, 2026 through the Ducommun Incorporated Employee Stock Purchase Plan.
F4 Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on March 4, 2026, of 75,503 performance stock units described in footnote (1) above.
F5 Represents the vesting of 23,649 performance restricted stock units (n/k/a revenue performance stock units) granted on May 8, 2023 as a result of the satisfaction of performance criteria underlying the award.
F6 Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on March 4, 2026 of 23,640 performance restricted stock units (n/k/a revenue performance stock units) as described in footnote (5) above.
F7 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.