TriMas director buys 63 TriMas shares in open market

TriMas Corp director Daniel P. Tredwell purchased 63.692 shares of common stock on August 12, 2026 in an open-market or private transaction at a weighted average price of $39.631 per share.

Rhea-AI Filing Summary

TriMas Corp director Daniel P. Tredwell purchased 63.692 shares of common stock on August 12, 2026 in an open-market or private transaction at a weighted average price of $39.631 per share. Following this trade, he directly holds 63,521.625 shares, plus 7,500 shares held indirectly by his spouse.

Insider Trade Summary

Net Buyer: 63.692 shares

Net Buy 2 txns

Insider Tredwell Daniel P

Role Director

Bought 63.692 shs ($3K)

Type	Security	Shares	Price	Value
Purchase	Common Stock F1	63.692	$39.631	$3K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 63,521.625 shares (Direct); Common Stock — 7,500 shares (Indirect, By spouse)

Footnotes (1)

1. F1. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $39.631 to $39.632 inclusive. The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4.

Key Figures

Shares purchased: 63.692 shares Purchase price: $39.631 per share Direct holdings after transaction: 63,521.625 shares +2 more

5 metrics

Shares purchased 63.692 shares Common stock purchase on August 12, 2026

Purchase price $39.631 per share Weighted average price for the August 12, 2026 purchase

Direct holdings after transaction 63,521.625 shares Directly owned TriMas common stock following the reported purchase

Indirect holdings (spouse) 7,500 shares Shares held indirectly by spouse as reported in the filing

Net buy shares 63.692 shares Net buy direction across reported non-derivative transactions

Key Terms

weighted average price, indirect, Rule 10b5-1, open market or private transaction

4 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

indirect financial

"total_shares_following_transaction 7500.0000, direct_or_indirect I, nature_of_ownership By spouse"

Rule 10b5-1 regulatory

"The reporting person undertakes to provide ... or the staff of the Securities and Exchange Commission"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

open market or private transaction financial

"transaction_code_description Purchase in open market or private transaction"

FAQ

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

What did TriMas Corp (TRS) director Daniel P. Tredwell report on this Form 4?

Daniel P. Tredwell reported a purchase of 63.692 TriMas common shares on August 12, 2026 at a weighted average price of $39.631 per share, increasing his reported holdings.

How many TriMas Corp (TRS) shares does Daniel P. Tredwell now own after the reported transaction?

After the reported transaction, Daniel P. Tredwell beneficially owns 63,521.625 shares directly and 7,500 shares indirectly through his spouse, as disclosed in the ownership entries.

At what price did Daniel P. Tredwell buy TriMas Corp (TRS) shares on August 12, 2026?

He bought the TriMas shares at a weighted average price of $39.631 per share, with individual trades executed in a narrow range from $39.631 to $39.632 inclusive.

Were the TriMas Corp (TRS) share purchases by Daniel P. Tredwell under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not marked as affirmative, indicating the reported purchase was not designated as made under a Rule 10b5-1 trading plan in this report.

How many TriMas Corp (TRS) shares were bought in this Form 4 transaction?

The Form 4 reports that 63.692 shares of TriMas common stock were purchased in this transaction, with a reported net-buy direction based on the acquired shares.

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

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Available on EDGAR 08/14/2026 - 04:34 PM Accepted by SEC EDGAR 08/14/2026 - 04:30 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^*

Tredwell Daniel P

(Last) (First) (Middle)

263 TRESSER BLVD.

9TH FLOOR

(Street)

STAMFORD CONNECTICUT 06901

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
TRIMAS CORP [ TRS ]

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/12/2026

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	08/12/2026	08/13/2026	P		63.692	A	$39.631(1)	63,521.625	D
Common Stock								7,500	I	By spouse

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. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $39.631 to $39.632 inclusive. The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4.

Remarks:

	/s/ Jodi F. Robin, as attorney-in-fact	08/14/2026
	** 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)