# EDGAR Filing Document

**Accession Number:** 0002040467
**File Stem:** 0000902664-26-002722
**Filing Date:** 2026-6
**Character Count:** 10119
**Document Hash:** e3c65d11f767ddcc337b315c6e8f3ea1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000902664-26-002722.hdr.sgml**: 20260608

**ACCESSION NUMBER**: 0000902664-26-002722

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260608

**DATE AS OF CHANGE**: 20260608

**SUBJECT COMPANY**: 

**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:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-40013
- **FILM NUMBER:** 261074427

**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
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Trend International Holding AG
- **CENTRAL INDEX KEY:** 0002040467

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** V8
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** WIESENSTRASSE 9 ZURICH
- **CITY:** ZURICH
- **PROVINCE COUNTRY:** V8
- **BUSINESS PHONE:** 41 44 268 69 38

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** WIESENSTRASSE 9 ZURICH
- **CITY:** ZURICH
- **PROVINCE COUNTRY:** V8

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 4)**

**TRIMAS CORP**

*(Name of Issuer)*

**Common Stock, par value $0.01 per share**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Trend International Holding AG**<br>Wiesenstrasse 9<br>8008 Zurich V8 0<br>41 44 268 69 38

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**03/02/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Trend International Holding AG** | Name of reporting person<br>**Trend International Holding AG** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**V8** | Citizenship or place of organization<br>**V8** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**4170667.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**4170667.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**4170667.00** | Aggregate amount beneficially owned by each reporting person<br>**4170667.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**11.6%** | Percent of class represented by amount in Row (11)<br>**11.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Shawn Sedaghat** | Name of reporting person<br>**Shawn Sedaghat** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**7633.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**6054425.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**7633.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**6054425.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**6054425.00** | Aggregate amount beneficially owned by each reporting person<br>**6054425.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**16.9%** | Percent of class represented by amount in Row (11)<br>**16.9%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** The 6,062,058 shares of Common Stock include a total of (i) 7,633 shares of Common Stock directly held by Mr. Sedaghat (including 2,853 shares of Common Stock underlying RSUs directly held by Mr. Sedaghat) and (ii) 6,054,425 shares of Common Stock held by Trend and Swan.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $0.01 per share

**(b) Name of Issuer:**
TRIMAS CORP

**(c) Address of Issuer's Principal Executive Offices:**
38505 WOODWARD AVENUE, SUITE 200, BLOOMFIELD HILLS, MI, 48304

This Amendment No. 4 ("Amendment No. 4") amends the statement on Schedule 13D filed by the Reporting Persons on October 15, 2024, with the Securities and Exchange Commission (the "SEC") (as amended, the "Schedule 13D") with respect to the shares of common stock, par value $0.01 per share ("Common Stock") of TriMas Corporation, a Delaware corporation (the "Issuer").  Capitalized terms used herein and not otherwise defined in this Amendment No. 4 have the meanings set forth in the Schedule 13D.  This Amendment No. 4 amends and restates the last paragraph of Items 3 and 5 (a)-(b) and amends and supplements Item 6 as set forth below. This Amendment No. 4 is being filed to reflect a change in beneficial ownership solely as a result of a decrease in the number of outstanding shares of Common Stock as reported in the Issuer's Annual Report for the fiscal year ended December 31, 2025 and Quarterly Report for the quarterly period ended March 31, 2026, and not as a result of an acquisition of shares of Common Stock by the Reporting Persons.

**Item 5. Interest in Securities of the Issuer**

**(a)**
See rows (11) and (13) of the cover pages to the Schedule 13D for the aggregate number of shares of Common Stock and percentage of shares of Common Stock beneficially owned by the Reporting Persons.  The aggregate percentage of shares of Common Stock reported beneficially owned by the Reporting Persons is based upon 35,827,685 shares of Common Stock outstanding as of April 23, 2026, as disclosed in the Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2026, filed by the Issuer with the SEC on April 30, 2026, and assumes the shares of Common Stock underlying the RSUs reported herein are outstanding.

**(b)**
See rows (7) through (10) of the cover pages to the Schedule 13D for the shares of Common Stock as to which the Reporting Persons have the sole or shared power to vote or direct the vote and sole or shared power to dispose or to direct the disposition.

**(c)**
There were no transactions in the shares of Common Stock effected by the Reporting Persons during the last sixty (60) days. In addition, RSUs granted to Mr. Sedaghat for his service on the Board settled into shares of Common Stock on April 14, 2026 and were reported in the Reporting Persons' Form 4 filed on April 16, 2026.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

On March 14, 2026, Mr. Sedaghat received a grant of 2,853 RSUs in consideration for his service on the Board.  These RSUs will vest on March 14, 2027.  In addition, on April 14, 2026, Mr. Sedaghat received a grant of 640 RSUs (which settled into shares of Common Stock on the same day) in consideration for his service on the Board.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Trend International Holding AG

**Signature:** /s/ Shawn Sedaghat

**Name/Title:** Shawn Sedaghat, Chairman of the Board

**Date:** 06/08/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Shawn Sedaghat

**Signature:** /s/ Shawn Sedaghat

**Name/Title:** Shawn Sedaghat, Individually

**Date:** 06/08/2026