Suman B. Mookerji - 04 Mar 2026 Form 4 Insider Report for DUCOMMUN INC /DE/ (DCO)

Role
Sr. V.P., C.F.O.
Signature
Suman B. Mookerji
Issuer symbol
DCO
Transactions as of
04 Mar 2026
Net transactions value
-$1,974,095
Form type
4
Filing time
06 Mar 2026, 16:54:40 UTC
Previous filing
29 Aug 2025
Next filing
10 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Mookerji Suman B. Sr. V.P., C.F.O. 600 ANTON BLVD., SUITE 1100, COSTA MESA Suman B. Mookerji 06 Mar 2026 0001975924

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction DCO Common Stock Award +14,315 +34% $0.000000* 56,074 04 Mar 2026 Direct F1, F2
transaction DCO Common Stock Tax liability -7,695 -14% $139.45* 48,379 04 Mar 2026 Direct F3
transaction DCO Common Stock Award +3,361 +6.9% $0.000000* 51,740 04 Mar 2026 Direct
transaction DCO Common Stock Tax liability -1,361 -2.6% $130.19* 50,379 05 Mar 2026 Direct F4
transaction DCO Common Stock Options Exercise +4,700 +9.3% $42.25* 55,079 05 Mar 2026 Direct
transaction DCO Common Stock Tax liability -3,186 -5.8% $139.45* 51,893 05 Mar 2026 Direct
transaction DCO Common Stock Sale $1,974,095 -14,709 -28% $134.21 37,184 04 Mar 2026 Direct F5

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction DCO Option - Right to Purchase Options Exercise +4,700 +10% $0.000000* 51,893 05 Mar 2026 Common Stock 1,514 $42.25 Direct F6, 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 Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on March 4, 2026, of 14,315 performance stock units as described in footnote (1) above.
F4 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.
F5 This transaction was executed in multiple trades at prices ranging from $127.00 to $138.50. 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.
F6 This option represents the right to purchase common stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.
F7 This option vested in one-third increments on each of June 17, 2020, 2021 and 2022.