Ducommun CEO exercises options and sells shares

Ducommun Incorporated’s Chairman, President and CEO Stephen G. Oswald reported several equity transactions in August 2026.

Rhea-AI Filing Summary

Ducommun Incorporated’s Chairman, President and CEO Stephen G. Oswald reported several equity transactions in August 2026. On August 11, he exercised options for 15,000 shares of common stock at $32.90 per share and delivered or withheld 9,234 shares at $194.85 per share for payment of exercise price or tax liability. That day he also acquired 15,000 common shares from the option exercise. On August 12, he sold 5,766 shares of common stock in open-market trades at a weighted average price of $201.15 per share and made a bona fide gift of 3,400 shares. The exercised option, granted under Ducommun’s Stock Incentive Plan, expires on May 14, 2028.

Insider Trade Summary

Exercise and sale activity reported; no spread calculated

Exercise and Sale 5 txns

Insider Oswald Stephen G

Role Chairman, President & CEO

Sold 5,766 shs ($1.16M)

Approx. gross sale proceeds $1.16M

Approx. exercise cost $494K

Type	Security	Shares	Price	Value
Sale	Common Stock F1	5,766	$201.15	$1.16M
Gift	Common Stock F2	3,400	$0.00	$0.00
Exercise	Option - Right to Buy F3, F4	15,000	$0.00	$0.00
Exercise	Common Stock	15,000	$32.90	$494K
Exercise Price or Tax Liability	Common Stock	9,234	$194.85	$1.80M

Holdings After Transaction: Option - Right to Buy — 17,500 contracts (Direct); Common Stock — 382,475 shares (Direct)

Footnotes (4)

1. F1. This transaction was executed in multiple trades at prices ranging from $200.15 to $202.08. 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 prices at which the transaction was effectuated.
2. F2. The number of shares gifted on August 12, 2026 was inadvertently identified as 2,244 shares, which has been corrected above.
3. F3. This option represents the right to purchase common stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.
4. F4. This option vested in one-third increments on each of May 14, 2019, 2020 and 2021.

Key Figures

Shares sold: 5,766 shares Weighted average sale price: $201.15 per share Shares gifted: 3,400 shares +4 more

7 metrics

Shares sold 5,766 shares Common stock sold on August 12, 2026

Weighted average sale price $201.15 per share Open-market sale on August 12, 2026, trades from $200.15 to $202.08

Shares gifted 3,400 shares Bona fide gift on August 12, 2026

Options exercised 15,000 shares Option exercise into common stock on August 11, 2026

Option exercise price $32.90 per share Conversion or exercise price for 15,000-share option

Shares delivered/withheld 9,234 shares Code F transaction for exercise price or tax liability on August 11, 2026

Option expiration date May 14, 2028 Expiration for the exercised stock option grant

Key Terms

weighted average sale price, bona fide gift, Stock Incentive Plan, Rule 16b-3 plan, +1 more

5 terms

weighted average sale price financial

"The price reported above reflects the weighted average sale price."

bona fide gift financial

"transaction_code_description": "Bona fide gift""

A bona fide gift is a genuine, voluntary transfer of money, property, or benefits from one party to another made without expectation of repayment, services, or hidden conditions. Investors care because such gifts can affect company disclosures, related‑party transaction rules, tax treatment, and perceived conflicts of interest; think of it like someone giving you a present with no strings attached — but on a corporate scale, auditors and regulators need to verify it really is unconditional.

Stock Incentive Plan financial

"purchase common stock under Ducommun Incorporated's Stock Incentive Plan"

A stock incentive plan is a company program that gives employees or directors pieces of ownership or the right to buy shares over time, similar to receiving a bonus paid in company stock instead of cash. Investors pay attention because these plans align staff incentives with long‑term company performance but can also dilute existing shareholders and affect reported profits when grants are expensed, so they influence both ownership percentages and financial results.

Rule 16b-3 plan regulatory

"Stock Incentive Plan, which is a Rule 16b-3 plan."

Payment of exercise price or tax liability financial

"Payment of exercise price or tax liability by delivering or withholding securities"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What transactions did DCO’s CEO Stephen G. Oswald report on this Form 4/A?

Stephen G. Oswald reported exercising options for 15,000 shares, selling 5,766 shares, gifting 3,400 shares, and delivering or withholding 9,234 shares to cover the option exercise price or tax liability in August 2026.

How many Ducommun (DCO) shares did the CEO sell and at what price?

He sold 5,766 shares of Ducommun common stock on August 12, 2026 at a weighted average price of $201.15 per share, with trades executed between $200.15 and $202.08 as disclosed.

What stock options did the Ducommun (DCO) CEO exercise in August 2026?

On August 11, 2026, Oswald exercised options covering 15,000 shares of Ducommun common stock at a conversion or exercise price of $32.90 per share, under the company’s Stock Incentive Plan, expiring May 14, 2028.

How many Ducommun (DCO) shares were used to cover the exercise price or taxes?

To pay the option exercise price or related tax liability, 9,234 shares of Ducommun common stock were delivered or withheld at a reference price of $194.85 per share in a code F transaction.

What gift of Ducommun (DCO) shares did the CEO make, and was any amount corrected?

Oswald made a bona fide gift of 3,400 shares on August 12, 2026. A footnote explains a prior report mistakenly identified this gift as 2,244 shares, which has been corrected to 3,400 shares.

Were the Ducommun (DCO) CEO’s August 2026 trades under a Rule 10b5-1 plan?

The Form 4/A indicates the Rule 10b5-1 checkbox is not checked, and the footnotes do not state that these August 2026 transactions were made pursuant to a Rule 10b5-1 trading plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/13/2026 - 06:31 PM Accepted by SEC EDGAR 08/13/2026 - 06:30 PM Learn about SEC filing dates

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^*

Oswald Stephen G

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/11/2026

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)
08/13/2026

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	08/11/2026		M		15,000	A	$32.9	400,875	D
Common Stock	08/11/2026		F		9,234	D	$194.85	391,641	D
Common Stock	08/12/2026		S		5,766	D	$201.15(1)	385,875	D
Common Stock	08/12/2026		G		3,400(2)	D	$0	382,475	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
Option - Right to Buy(3)	$32.9	08/11/2026		M			15,000	05/14/2021(4)	05/14/2028	Common Stock	15,000	$0	17,500	D

Explanation of Responses:

1. This transaction was executed in multiple trades at prices ranging from $200.15 to $202.08. 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 prices at which the transaction was effectuated.

2. The number of shares gifted on August 12, 2026 was inadvertently identified as 2,244 shares, which has been corrected above.

3. This option represents the right to purchase common stock under Ducommun Incorporated's Stock Incentive Plan, which is a Rule 16b-3 plan.

4. This option vested in one-third increments on each of May 14, 2019, 2020 and 2021.

	Stephen G. Oswald	08/13/2026
	** 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.
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.
* Form 4: SEC 1474 (03-26)