Form 8-K

8-K — TRIMAS CORP

Accession: 0000842633-26-000033

Filed: 2026-05-21

Period: 2026-05-20

CIK: 0000842633

SIC: 3460 (METAL FORGING & STAMPINGS)

Item: Submission of Matters to a Vote of Security Holders

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8-K — trs-20260520.htm (Primary)

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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) May 20, 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, Suite 200, Bloomfield Hills, 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 5.07. Submission of Matters to a Vote of Security Holders.

TriMas Corporation (the "Company") held its 2026 Annual Meeting of Shareholders on May 20, 2026 (the "Annual Meeting").

There were a total of 36,685,359 shares of the Company’s common stock outstanding and entitled to vote at the Annual Meeting, and there were 30,071,708 shares of common stock represented in person or by proxy at the Annual Meeting, which constituted a quorum to conduct business at the Annual Meeting.

The items voted upon at the Annual Meeting and the results of the vote on each proposal were as follows:

Proposal 1. Election of directors for a three-year term:

FOR WITHHELD BROKER NON-VOTES

Holly M. Boehne 25,466,170 2,825,985 1,779,553

Herbert K. Parker 27,625,447 666,708 1,779,553

Proposal 2. Ratification of the appointment of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the year ending December 31, 2026:

FOR AGAINST ABSTAIN

29,966,034 104,188 1,486

Proposal 3. Approval, on a non-binding advisory basis, of the compensation paid to the Company’s Named Executive Officers:

FOR AGAINST ABSTAIN BROKER NON-VOTES

23,049,659 5,199,440 43,056 1,779,553

Based on the votes set forth above, each of the nominees for director were elected as directors and proposals 2 and 3 were approved by the shareholders of the Company.

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

Date: May 21, 2026 By: /s/ Jodi Robin

Name: Jodi Robin

Title: General Counsel and Secretary

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May 20, 2026

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Document Period End Date

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Entity Registrant Name

TRIMAS CORPORATION

Entity Incorporation, State or Country Code

Entity File Number

001-10716

Entity Tax Identification Number

38-2687639

Entity Address, Address Line One

38505 Woodward Avenue,

Entity Address, Address Line Two

Suite 200,

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Bloomfield Hills,

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48304

City Area Code

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