TRS · Annual Report (Form 10-K) · Filed March 2, 2026

Trimas Corp — 10-K exhibit

trs-123125xexh211.htm

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Exhibit 21.1

TriMas Corporation Subsidiary List

In accordance with Item 601(b)(21)(ii) of Regulation S-K, the following list of subsidiaries of TriMas Corporation excludes certain subsidiaries that, considered in the aggregate as a single subsidiary, did not constitute a significant subsidiary (as defined in Rule 1-02(w) of Regulation S-X) at December 31, 2025.


Subsidiary name						Jurisdiction of incorporation or organization
Aarts Packaging B.V.						Netherlands
Affaba & Ferrari S.r.L						Italy
Allfast Fastening Systems, LLC						California
Boost Holdco Company						Delaware
Haining Rieke Packaging Systems Co., Ltd.						China
Intertech Medical, LLC						Colorado
Intertech Plastics, LLC						Colorado
Mac Fasteners, Inc.						Kansas
Martinic Engineering, Inc.						California
Monogram Aerospace Fasteners, Inc.						Delaware
Norris Cylinder Company						Delaware
Omega Plastics, Inc.						Michigan
Plastic S.r.L.						Italy
Rapak, LLC						Delaware
Rieke de Mexico Manufacturing, S. de R.L. de C.V.						Mexico
Rieke Germany Holdings GmbH						Germany
Rieke LLC						Indiana
Rieke Packaging India Private Limited						India
Rieke Packaging Systems Limited						United Kingdom
RSA Engineered Products, LLC						Delaware
Taplast S.r.L.						Italy
Taplast SK, s.r.o.						Slovakia
TFI Aerospace ULC						Alberta
TriMas Aerospace Germany GmbH						Germany
TriMas Company LLC						Delaware
TriMas Corporation Limited						United Kingdom
TriMas Packaging Brasil Ltda.						Brazil

Certain companies may also use trade names or other assumed names in the conduct of their business.

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