DCO Form 4: 359-Share Disposition by CFO Linked to 667 RSU Vesting

Rhea-AI Filing Summary

Ducommun Inc. insider sale by Suman B. Mookerji. The company reported that Suman B. Mookerji, who serves as Senior Vice President and Chief Financial Officer and is a director, sold 359 shares of Ducommun common stock on 08/29/2025 at a price of $91.22 per share. After the transaction, Mookerji beneficially owned 41,759 shares directly. The filing explains the 359-share disposition represents shares surrendered to satisfy tax withholding related to the vesting of 667 restricted stock units on August 29, 2025.

Positive

• Compliance with Section 16 reporting—the insider timely filed Form 4 disclosing the transaction
• Transaction is administrative—the sale was to satisfy tax withholding tied to RSU vesting, not an open-market cash sale

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine tax-withholding sale tied to RSU vesting by a senior officer; not a market-exit signal.

The Form 4 documents a small-scale disposition of 359 shares at $91.22 to meet tax obligations from the vesting of 667 RSUs. The transaction is administrative in nature rather than an open-market cash-raising sale; ownership after the transaction remains material at 41,759 shares. For governance review, this is a standard insider reporting event showing compliance with Section 16 reporting and tax withholding procedures.

Securities Analyst

TL;DR: Minor share reduction from RSU tax withholding; no material change to insider stake.

The 359-share disposition equals the portion of vested RSUs withheld for taxes, per the filing. Given the retained 41,759-share position, this transaction is immaterial to firm ownership metrics and unlikely to affect valuation or signal changed insider sentiment. It should be treated as routine compensation settlement.

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

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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^*

Mookerji Suman B.

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	S.V.P., CFO

3. Date of Earliest Transaction (Month/Day/Year)
08/29/2025

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	08/29/2025		F		359(1)	D	$91.22	41,759	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:

1. Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the vesting, on August 29, 2025, of 667 restricted stock units.

	Suman B. Mookerji	08/29/2025
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Ducommun insider Suman B. Mookerji report on Form 4 (DCO)?

The filing reports a disposition of 359 shares on 08/29/2025 at $91.22 per share and a remaining beneficial ownership of 41,759 shares.

Why were 359 shares disposed of according to the Form 4?

The Form 4 states the 359-share reduction was to satisfy tax withholding obligations related to the vesting of 667 restricted stock units on August 29, 2025.

What is Suman B. Mookerji's role at Ducommun as listed in the filing?

The filing lists Suman B. Mookerji as a Director and an Officer with the title S.V.P., CFO.

Does the Form 4 indicate a large insider sale or change in control?

No. The reported disposition is limited to 359 shares tied to tax withholding and the insider still beneficially owns 41,759 shares.