# EDGAR Filing Document

**Accession Number:** 0000842633
**File Stem:** 0001140361-26-012332
**Filing Date:** 2026-3
**Character Count:** 2271
**Document Hash:** 911ac40384b8aebb9dd9a35d042ef072
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-012332.hdr.sgml**: 20260331

**ACCESSION NUMBER**: 0001140361-26-012332

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260331

**DATE AS OF CHANGE**: 20260331

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TRIMAS CORP
- **CENTRAL INDEX KEY:** 0000842633
- **STANDARD INDUSTRIAL CLASSIFICATION:** METAL FORGING & STAMPINGS [3460]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 382687639
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-10716
- **FILM NUMBER:** 26821875

**BUSINESS ADDRESS:**
- **STREET 1:** 38505 WOODWARD AVENUE
- **STREET 2:** SUITE 200
- **CITY:** BLOOMFIELD HILLS
- **STATE:** MI
- **ZIP:** 48304
- **BUSINESS PHONE:** 2486315400

**MAIL ADDRESS:**
- **STREET 1:** 38505 WOODWARD AVENUE
- **STREET 2:** SUITE 200
- **CITY:** BLOOMFIELD HILLS
- **STATE:** MI
- **ZIP:** 48304

#### UNITED STATES<br>

#### SECURITIES AND EXCHANGE COMMISSION<br>

#### Washington, DC 20549

#### SCHEDULE 14A

#### (RULE 14a-101)<br>

#### INFORMATION REQUIRED IN PROXY STATEMENT <br>

#### SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of<br>

the Securities Exchange Act of 1934 (Amendment No.)<br>

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement 

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) 

 ☐ Definitive Proxy Statement 

☒ Definitive Additional Materials 

☐ Soliciting Material under §240.14a-12

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| |
|:---|
| **TriMas Corporation**  |
| (Name of Registrant as Specified in its Charter)  |
| (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant) |

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| | |
|:---|:---|
| Payment of Filing Fee (Check all boxes that apply):  | Payment of Filing Fee (Check all boxes that apply):  |
| ☒  | No fee required  |
| ☐ | Fee paid previously with preliminary materials  |
| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

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