Ducommun (NYSE: DCO) CEO Stephen Oswald reports 1,234-share stock disposition

Rhea-AI Filing Summary

Ducommun Inc. insider activity: Chairman, President & CEO and director Stephen G. Oswald reported a change in his holdings of Ducommun Inc. common stock. On 12/11/2025, he disposed of 1,234 shares in a transaction coded "G" at a reported price of $0 per share. Following this transaction, he directly beneficially owned 375,657 shares of Ducommun common stock.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Oswald Stephen G

(Last) (First) (Middle)

600 ANTON BLVD.

SUITE 1100

(Street)

COSTA MESA CA 92626

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
DUCOMMUN INC /DE/ [ DCO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chairman, President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
12/11/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/11/2025		G		1,234	D	$0	375,657	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	Stephen G. Oswald	12/12/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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FAQ

What insider transaction did Ducommun Inc. (DCO) report for Stephen G. Oswald?

Stephen G. Oswald, Ducommun Inc.'s Chairman, President & CEO and director, reported disposing of 1,234 shares of Ducommun common stock in a transaction dated 12/11/2025.

At what price were the Ducommun Inc. (DCO) shares transferred in the reported transaction?

The 1,234 Ducommun Inc. common shares were reported as disposed of at a price of $0 per share.

How many Ducommun Inc. (DCO) shares does Stephen G. Oswald own after the transaction?

After the reported transaction, Stephen G. Oswald directly beneficially owned 375,657 shares of Ducommun Inc. common stock.

What is the transaction code used in the Ducommun Inc. (DCO) Form 4 filing?

The transaction was reported with transaction code "G" in Table I of the Form 4.

What roles does Stephen G. Oswald hold at Ducommun Inc. (DCO)?

Stephen G. Oswald is reported as a director and an officer of Ducommun Inc., serving as Chairman, President & CEO.

Is the Ducommun Inc. (DCO) Form 4 filed by one or multiple reporting persons?

The Form 4 is indicated as being filed by one reporting person, Stephen G. Oswald.