# EDGAR Filing Document

**Accession Number:** 0000842633
**File Stem:** 0001140361-23-014820
**Filing Date:** 2023-3
**Character Count:** 2253
**Document Hash:** ff46a49d193b895a837e754539cdfc4e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-23-014820.hdr.sgml**: 20230330

**ACCESSION NUMBER**: 0001140361-23-014820

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20230330

**DATE AS OF CHANGE**: 20230330

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TRIMAS CORP
- **CENTRAL INDEX KEY:** 0000842633
- **STANDARD INDUSTRIAL CLASSIFICATION:** METAL FORGING & STAMPINGS [3460]
- **IRS NUMBER:** 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:** 23780812

**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

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, DC 20549

### SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No.)

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

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