TRIMAS CORP — Earnings Release 2026

Apr 30, 2026

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

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) April 30, 2026

TRIMAS CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	001-10716	38-2687639
(State or other jurisdiction	(Commission	(IRS Employer
of incorporation)	File Number)	Identification No.)

38505 Woodward Avenue,	48304
Michigan
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code ( 248 ) 631-5450

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading symbol(s)	Name of exchange on which registered
Common stock, $0.01 par value	TRS	The NASDAQ Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Operations and Financial Condition.

TriMas Corporation (the “Company”) issued a press release on April 30, 2026, reporting its financial results for the first quarter ending March 31, 2026. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The press release is also available on the Corporation's website at www.trimas.com .

The information presented in Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities under that Section and shall not be deemed to be incorporated by reference into any filing of the Company under the Securities Act of 1933 (the "Securities Act") or the Exchange Act.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits. The following exhibits are furnished herewith:

Exhibit No.	Description
99.1	Press Release, dated April 30 , 202 6 , reporting financial results for the quarter ended Ma r ch 3 1 , 202 6 .
104	Cover Page Interactive File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

TRIMAS CORPORATION — By:	/s/ Paul A. Swart
Name:	Paul A. Swart
Title:	Chief Financial Officer