TriMas (TRS) holder Sedaghat reports 16.9% beneficial stake

Rhea-AI Filing Summary

Trend International Holding and Shawn Sedaghat filed Amendment No. 4 to their Schedule 13D on TriMas Corporation. The amendment updates their reported beneficial ownership percentages after TriMas disclosed 35,827,685 shares of common stock outstanding as of April 23, 2026.

Trend reports beneficial ownership of 4,170,667 shares, or 11.6% of TriMas common stock, all with shared voting and dispositive power. Sedaghat reports beneficial ownership of 6,054,425 shares, or 16.9% of the class, largely held through entities including Trend and Swan, plus 7,633 shares held directly.

The filing explains that the change in reported ownership is due solely to the decrease in TriMas’s outstanding shares, not new share purchases. It also notes Sedaghat’s board compensation in the form of restricted stock units, including a 2,853 RSU grant on March 14, 2026 and a 640 RSU grant on April 14, 2026, both in consideration for his board service.

Key Figures

Trend beneficial ownership: 4,170,667 shares (11.6%) Sedaghat beneficial ownership: 6,054,425 shares (16.9%) Shares outstanding: 35,827,685 shares +3 more

6 metrics

Trend beneficial ownership 4,170,667 shares (11.6%) TriMas common stock beneficially owned by Trend International Holding

Sedaghat beneficial ownership 6,054,425 shares (16.9%) TriMas common stock beneficially owned by Shawn Sedaghat

Shares outstanding 35,827,685 shares TriMas common stock outstanding as of April 23, 2026

Sedaghat direct holdings 7,633 shares TriMas shares directly held by Sedaghat, including RSUs

RSU grant March 14, 2026 2,853 RSUs Granted to Sedaghat for board service; vest on March 14, 2027

RSU grant April 14, 2026 640 RSUs Granted and settled into shares the same day for board service

Key Terms

beneficially owned, Schedule 13D, restricted stock units, shared voting power, +2 more

6 terms

beneficially owned financial

"for the aggregate number of shares of Common Stock and percentage of shares of Common Stock beneficially owned by the Reporting Persons"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Schedule 13D regulatory

"This Amendment No. 4 ("Amendment No. 4") amends the statement on filed by the Reporting Persons ... with respect to the shares of common stock"

A Schedule 13D is a legal document that investors file with regulators when they buy a large enough stake in a company to potentially influence its management or decisions. It provides details about the investor’s intention, ownership stake, and plans, helping other investors understand who is gaining control and what their motives might be.

restricted stock units financial

"the 2,853 shares of Common Stock underlying restricted stock units ("RSUs") reported herein are directly held by Mr. Sedaghat"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

shared voting power financial

"Number of Shares Beneficially Owned by Each Reporting Person With: | 7 | Sole Voting Power 0.00 8 | Shared Voting Power 4,170,667.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"9 | Sole Dispositive Power 0.00 10 | Shared Dispositive Power 4,170,667.00"

RSUs financial

"On March 14, 2026, Mr. Sedaghat received a grant of 2,853 RSUs in consideration for his service on the Board."

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

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Available on EDGAR 06/08/2026 - 09:45 PM Accepted by SEC EDGAR 06/08/2026 - 09:45 PM Learn about SEC filing dates

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)

896215209

(CUSIP Number)

Trend International Holding AG
Wiesenstrasse 9,
8008 Zurich, V8, 0
41 44 268 69 38

Ele Klein
McDermott Will & Schulte LLP, 919 Third Avenue
New York, NY, 10022
212-756-2000

(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)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 896215209

1

Name of reporting person

Trend International Holding AG

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

WC

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

SWITZERLAND

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 4,170,667.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 4,170,667.00

11

Aggregate amount beneficially owned by each reporting person

4,170,667.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

11.6 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP Number(s): 896215209

1

Name of reporting person

Shawn Sedaghat

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

AF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 7,633.00
8	Shared Voting Power 6,054,425.00
9	Sole Dispositive Power 7,633.00
10	Shared Dispositive Power 6,054,425.00

11

Aggregate amount beneficially owned by each reporting person

6,054,425.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

16.9 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of 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.

SCHEDULE 13D

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, MICHIGAN , 48304.
Item 1 Comment: 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 3.	Source and Amount of Funds or Other Consideration
	As further explained in Item 6, the 2,853 shares of Common Stock underlying restricted stock units ("RSUs") reported herein are directly held by Mr. Sedaghat and were issued in consideration for his service on the Board.
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.

Trend International Holding AG

Signature:	/s/ Shawn Sedaghat
Name/Title:	Shawn Sedaghat, Chairman of the Board
Date:	06/08/2026

Shawn Sedaghat

Signature:	/s/ Shawn Sedaghat
Name/Title:	Shawn Sedaghat, Individually
Date:	06/08/2026

FAQ

What ownership stake in TriMas (TRS) does Trend International Holding report?

Trend International Holding reports beneficial ownership of 4,170,667 TriMas common shares, representing 11.6% of the outstanding class. All of these shares carry shared voting and shared dispositive power, reflecting Trend’s role as a significant institutional holder.

How many TriMas (TRS) shares does Shawn Sedaghat beneficially own?

Shawn Sedaghat reports beneficial ownership of 6,054,425 TriMas common shares, equal to 16.9% of the class. This includes 7,633 shares held directly, with 2,853 underlying RSUs, and the balance held through entities including Trend and Swan.

Why did Trend International and Sedaghat file Amendment No. 4 on TriMas (TRS)?

They filed Amendment No. 4 to update their Schedule 13D ownership percentages after a decrease in TriMas’s shares outstanding. The filing states the change reflects the new 35,827,685-share count, not additional share acquisitions by the reporting persons.

Did Trend International Holding or Shawn Sedaghat buy or sell TriMas (TRS) shares recently?

The filing states no transactions in TriMas common stock were effected by the reporting persons during the last sixty days. It notes only routine equity compensation events, including RSUs granted and settled for Sedaghat’s service on the TriMas board.

What RSU grants related to TriMas (TRS) did Shawn Sedaghat receive?

Sedaghat received 2,853 restricted stock units on March 14, 2026, vesting March 14, 2027, and 640 RSUs on April 14, 2026, which settled into shares the same day. Both grants were compensation for his service on the TriMas board.

What TriMas (TRS) share count underlies the reported ownership percentages?

The reported percentages are based on 35,827,685 TriMas common shares outstanding as of April 23, 2026. This figure comes from TriMas’s Form 10-Q for the quarter ended March 31, 2026 and assumes Sedaghat’s RSU shares are outstanding.