[Form 4] DUCOMMUN INC /DE/ Insider Trading Activity

Rhea-AI Filing Summary

Ducommun Inc. senior vice president and CFO Suman B. Mookerji reported two non‑market share dispositions tied to equity compensation on May 8, 2026. The filing shows 1,155 shares of common stock were withheld at $137.23 per share to satisfy tax obligations on the settlement of 2,329 restricted stock units. In addition, 1,174 shares were returned to Ducommun under its Second Amended and Restated Clawback Policy after the company determined, in light of restated financial statements, that this portion of compensation was not earned. Following these adjustments, Mookerji directly holds 27,064 shares of Ducommun common stock.

Insights

Equity compensation & governance analyst

CFO’s reported dispositions are compensation adjustments, not open‑market selling.

The Form 4 for Ducommun shows CFO Suman B. Mookerji disposing of shares through tax withholding and a clawback, rather than discretionary market trades. Both actions arise from equity compensation mechanics and the company’s governance policies.

Footnotes explain 1,155 shares were withheld at $137.23 to cover taxes on 2,329 restricted stock units that settled on May 8, 2026. Separately, 1,174 shares were returned to the issuer under its Second Amended and Restated Clawback Policy, linked to restated financial statements referenced in a prior Form 8-K.

After these non‑cash adjustments, the CFO directly holds 27,064 common shares. Because there are no open‑market purchases or sales, and the transactions follow formal tax and clawback rules, the informational value for short‑term trading sentiment is limited, though the clawback reference highlights active enforcement of compensation policies.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Mookerji Suman B.

Role Sr. V.P., C.F.O.

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	1,155	$137.23	$159K
Disposition	Common Stock	1,174	$0.00	--

Holdings After Transaction: Common Stock — 28,238 shares (Direct, null)

Footnotes (1)

1. Represents a reduction in shares to satisfy the tax withholding obligations of the Issuer with respect to the settlement, on May , 2026 of 2,329 restricted stock units. 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, 2,329 restricted stock units that vested on May 8, 2026 were not delivered to the Reporting Person and 1,174 shares of Issuer common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

Key Figures

Tax withholding shares: 1,155 shares Tax withholding price: $137.23 per share Clawback share return: 1,174 shares +2 more

5 metrics

Tax withholding shares 1,155 shares Withheld at $137.23 per share for tax obligations on RSU settlement

Tax withholding price $137.23 per share Price applied to 1,155 withheld shares on May 8, 2026

Clawback share return 1,174 shares Returned to issuer under Second Amended and Restated Clawback Policy

RSUs referenced 2,329 restricted stock units Units that settled and were affected by tax withholding and clawback

Shares held after transactions 27,064 shares Direct common stock ownership following reported dispositions

Key Terms

restricted stock units, Second Amended and Restated Clawback Policy, clawback, restatement, +1 more

5 terms

restricted stock units financial

"settlement, on May , 2026 of 2,329 restricted stock units."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Second Amended and Restated Clawback Policy financial

"In connection with the operation of the Issuer's Second Amended and Restated Clawback Policy"

clawback financial

"shares of Issuer common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy."

A clawback is a contractual or legal right to recover money that was already paid out—often executive bonuses, incentives, or erroneous payments—when certain conditions change, such as fraud, accounting mistakes, or failure to meet performance targets. It matters to investors because clawbacks protect shareholder value by discouraging risky or misleading behavior, can affect future cash flow and executive incentives, and signal stronger governance, much like a store recalling a refund after discovering it was issued in error.

restatement financial

"with respect to the restatement and revision of the Issuer's previously issued financial statements"

A restatement is a company’s formal correction of previously released financial reports when errors or omissions are discovered, similar to fixing a report card after finding mistakes in the scores. It matters to investors because it can change past performance figures, alter valuation or earnings trends, and signal weaknesses in accounting controls or management oversight, which may affect confidence and the stock’s perceived risk.

tax withholding obligations financial

"reduction in shares to satisfy the tax withholding obligations of the Issuer"

Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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 CALIFORNIA 92626

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	Sr. V.P., C.F.O.

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/08/2026

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

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

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

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	05/08/2026		F		1,155(1)	D	$137.23	28,238	D
Common Stock	05/08/2026		D		1,174(2)	D	(2)	27,064	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 settlement, on May , 2026 of 2,329 restricted stock units.

2. 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, 2,329 restricted stock units that vested on May 8, 2026 were not delivered to the Reporting Person and 1,174 shares of Issuer common stock were returned to the Issuer in accordance with the Issuer's Clawback Policy.

	Suman B. Mookerji	05/12/2026
	** 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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* Form 4: SEC 1474 (03-26)