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Trend\nInternational Holding AG (\"Trend\") does not have beneficial ownership of the Director Shares, and specifically disclaims beneficial ownership of the Director Shares for purposes of Section 16 of the\nSecurities Exchange Act of 1934, as amended (\"Section 16\"). This report shall not be deemed to be an admission that Trend is the beneficial owner of the Director Shares for purposes of Section 16, or\nfor any other purpose."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"4,170,667 of the securities reported in Table One, Column Five are held directly by Trend. Mr. Sedaghat (and together with Trend, the \"Reporting Persons\") may be deemed to beneficially own such\nreported securities by virtue of the fact that Mr. Sedaghat is the Chairman of the Board of, and controls, Trend. Each of Trend and Mr. Sedaghat disclaims beneficial ownership of such reported securities for purposes of Section 16, except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Reporting Person is the beneficial owner of such reported securities for purposes of Section 16, or for any other purpose."}],"balance_after":4179566,"source":{"system":"sec-edgar","filing":"0001321614-26-000009","document":"wk-form4_1792012298.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2040467/000132161426000009/wk-form4_1792012298.xml","form_type":"4"}},{"id":687445,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":23541,"kind":"person","name":"Tredwell Daniel P","position":1,"cik":"0001399401","reported_name":"Tredwell Daniel P","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-08-14T20:30:40.000Z","date":"2026-08-12","kind":"purchase","planned":false,"acquired":true,"shares":63.692,"price":39.631,"value":2524.177652,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  These shares were purchased in multiple transactions at prices ranging from $39.631 to $39.632 inclusive.  The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4."}],"balance_after":63521.625,"source":{"system":"sec-edgar","filing":"0001399401-26-000008","document":"wk-form4_1786739437.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000139940126000008/wk-form4_1786739437.xml","form_type":"4"}},{"id":708520,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":30202,"kind":"person","name":"SEDAGHAT SHAWN","position":1,"cik":"0001321614","reported_name":"SEDAGHAT SHAWN","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":30203,"kind":"organization","name":"Trend International Holding AG","position":2,"cik":"0002040467","reported_name":"Trend International Holding AG","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-07-16T20:46:50.000Z","date":"2026-07-14","kind":"grant","planned":false,"acquired":true,"shares":615,"price":40.64,"value":24993.6,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"8,248 of the securities reported herein, including the 615 securities subject to the transaction reported herein (the \"Director Shares\"), are directly held by Shawn Sedaghat (\"Mr. Sedaghat\"). Trend\nInternational Holding AG (\"Trend\") does not have beneficial ownership of the Director Shares, and specifically disclaims beneficial ownership of the Director Shares for purposes of Section 16 of the\nSecurities Exchange Act of 1934, as amended (\"Section 16\"). This report shall not be deemed to be an admission that Trend is the beneficial owner of the Director Shares for purposes of Section 16, or\nfor any other purpose."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"4,170,667 of the securities reported in Table One, Column Five are held directly by Trend. Mr. Sedaghat (and together with Trend, the \"Reporting Persons\") may be deemed to beneficially own such\nreported securities by virtue of the fact that Mr. Sedaghat is the Chairman of the Board of, and controls, Trend. Each of Trend and Mr. Sedaghat disclaims beneficial ownership of such reported securities for purposes of Section 16, except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Reporting Person is the beneficial owner of such reported securities for purposes of Section 16, or for any other purpose."}],"balance_after":4178915,"source":{"system":"sec-edgar","filing":"0001321614-26-000007","document":"wk-form4_1784234807.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000132161426000007/wk-form4_1784234807.xml","form_type":"4"}},{"id":722153,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":34267,"kind":"person","name":"Parker Herbert K","position":1,"cik":"0001436496","reported_name":"Parker Herbert K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-07-01T20:34:15.000Z","date":"2026-06-30","kind":"sale","planned":true,"acquired":false,"shares":15000,"price":45.031,"value":675465.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $45.000 to $45.120 inclusive.  The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"These sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 5, 2026."}],"balance_after":57762,"source":{"system":"sec-edgar","filing":"0001436496-26-000006","document":"wk-form4_1782938051.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000143649626000006/wk-form4_1782938051.xml","form_type":"4"}},{"id":727037,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":35505,"kind":"person","name":"Snyder Thomas 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Trend\nInternational Holding AG (\"Trend\") does not have beneficial ownership of the Director Shares, and specifically disclaims beneficial ownership of the Director Shares for purposes of Section 16 of the\nSecurities Exchange Act of 1934, as amended (\"Section 16\"). This report shall not be deemed to be an admission that Trend is the beneficial owner of the Director Shares for purposes of Section 16, or\nfor any other purpose."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"4,170,667 of the securities reported in Table One, Column Five are held directly by Trend. Mr. Sedaghat (and together with Trend, the \"Reporting Persons\") may be deemed to beneficially own such\nreported securities by virtue of the fact that Mr. Sedaghat is the Chairman of the Board of, and controls, Trend. Each of Trend and Mr. Sedaghat disclaims beneficial ownership of such reported securities\nfor purposes of Section 16, except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Reporting Person is the beneficial owner of\nsuch reported securities for purposes of Section 16, or for any other purpose."}],"balance_after":4178300,"source":{"system":"sec-edgar","filing":"0001321614-26-000005","document":"wk-form4_1776373862.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000132161426000005/wk-form4_1776373862.xml","form_type":"4"}},{"id":831549,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":14490,"kind":"person","name":"Finley Teresa","position":1,"cik":"0001630153","reported_name":"Finley Teresa","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-23T22:16:01.000Z","date":"2026-03-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":6192,"price":34.04,"value":210775.68,"ownership":{"direct":true},"balance_after":75152.301,"source":{"system":"sec-edgar","filing":"0001630153-26-000004","document":"wk-form4_1774304158.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000163015326000004/wk-form4_1774304158.xml","form_type":"4"}},{"id":842887,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":30202,"kind":"person","name":"SEDAGHAT SHAWN","position":1,"cik":"0001321614","reported_name":"SEDAGHAT SHAWN","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":30203,"kind":"organization","name":"Trend International Holding AG","position":2,"cik":"0002040467","reported_name":"Trend International Holding AG","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-03-16T22:57:00.000Z","date":"2026-03-14","kind":"grant","planned":false,"acquired":true,"shares":2853,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"6,993 of the securities reported herein, including the 2,853 securities subject to the transaction reported herein (the \"Director Shares\"), are directly held by Shawn Sedaghat (\"Mr. Sedaghat\"). Trend International Holding AG (\"Trend\") does not have beneficial ownership of the Director Shares, and specifically disclaims beneficial ownership of the Director Shares for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"). This report shall not be deemed to be an admission that Trend is the beneficial owner of the Director Shares for purposes of Section 16, or for any other purpose."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"4,170,667 of the securities reported in Table One, Column Five are held directly by Trend. Mr. Sedaghat (and together with Trend, the \"Reporting Persons\") may be deemed to beneficially own such\nreported securities by virtue of the fact that Mr. Sedaghat is the Chairman of the Board of, and controls, Trend. Each of Trend and Mr. Sedaghat disclaims beneficial ownership of such reported securities for purposes of Section 16, except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Reporting Person is the beneficial owner of such reported securities for purposes of Section 16, or for any other purpose."}],"balance_after":4177660,"source":{"system":"sec-edgar","filing":"0001321614-26-000003","document":"wk-form4_1773701817.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000132161426000003/wk-form4_1773701817.xml","form_type":"4"}},{"id":842888,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":60856,"kind":"person","name":"Swart Paul","position":1,"cik":"0001558931","reported_name":"Swart Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common 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These shares were purchased in multiple transactions at prices ranging from $25.94 to $26.25 inclusive. Mr. Sedaghat undertakes to\nprovide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares\npurchased at each separate price within the ranges set forth in footnote (4) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported herein are directly held by Swan Family Office, LLC (\"Swan Family Office\"). Mr. Sedaghat may be deemed to beneficially own the reported securities by virtue of the fact that Mr. Sedaghat is the Managing Member of Swan Family Office. Each of Swan Family Office and Mr. Sedaghat disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Swan Family Office or Mr. Sedaghat is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Trend (as defined in footnote (5) below) does not have beneficial ownership of these securities, and specifically disclaims beneficial ownership of these securities. This report shall not be deemed to\nbe an admission that Trend is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."}],"balance_after":1883758,"source":{"system":"sec-edgar","filing":"0000842633-25-000094","document":"wk-form4_1748037553.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000094/wk-form4_1748037553.xml","form_type":"4"}},{"id":1136230,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":30202,"kind":"person","name":"SEDAGHAT SHAWN","position":1,"cik":"0001321614","reported_name":"SEDAGHAT SHAWN","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":30203,"kind":"organization","name":"Trend International Holding AG","position":2,"cik":"0002040467","reported_name":"Trend International Holding AG","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-05-23T21:59:19.000Z","date":"2025-05-21","kind":"purchase","planned":false,"acquired":true,"shares":410172,"price":25.4278,"value":10429771.5816,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $25.085 to $25.75 inclusive. Shawn Sedaghat (\"Mr.\nSedaghat\") undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the\nnumber of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported herein are directly held by Swan Family Office, LLC (\"Swan Family Office\"). Mr. Sedaghat may be deemed to beneficially own the reported securities by virtue of the fact that Mr. Sedaghat is the Managing Member of Swan Family Office. Each of Swan Family Office and Mr. Sedaghat disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Swan Family Office or Mr. Sedaghat is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Trend (as defined in footnote (5) below) does not have beneficial ownership of these securities, and specifically disclaims beneficial ownership of these securities. This report shall not be deemed to\nbe an admission that Trend is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."}],"balance_after":1810821,"source":{"system":"sec-edgar","filing":"0000842633-25-000094","document":"wk-form4_1748037553.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000094/wk-form4_1748037553.xml","form_type":"4"}},{"id":1139636,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":30202,"kind":"person","name":"SEDAGHAT SHAWN","position":1,"cik":"0001321614","reported_name":"SEDAGHAT SHAWN","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":30203,"kind":"organization","name":"Trend International Holding AG","position":2,"cik":"0002040467","reported_name":"Trend International Holding AG","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-05-21T21:47:23.000Z","date":"2025-05-20","kind":"purchase","planned":false,"acquired":true,"shares":104957,"price":25.6983,"value":2697216.4731,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $25.405 to $25.80 inclusive. Mr. Sedaghat undertakes to\nprovide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares\npurchased at each separate price within the ranges set forth in footnote (5) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported herein are directly held by Swan Family Office, LLC (\"Swan Family Office\"). Mr. Sedaghat may be deemed to beneficially own the reported securities by virtue of the fact\nthat Mr. Sedaghat is the Managing Member of Swan Family Office. Each of Swan Family Office and Mr. Sedaghat disclaims beneficial ownership of the securities to which this filing relates for purposes\nof Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission\nthat either Swan Family Office or Mr. Sedaghat is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Trend (as defined in footnote (6) below) does not have beneficial ownership of these securities, and specifically disclaims beneficial ownership of these securities. This report shall not be deemed to\nbe an admission that Trend is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."}],"balance_after":1400649,"source":{"system":"sec-edgar","filing":"0000842633-25-000092","document":"wk-form4_1747864036.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000092/wk-form4_1747864036.xml","form_type":"4"}},{"id":1139635,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":30202,"kind":"person","name":"SEDAGHAT SHAWN","position":1,"cik":"0001321614","reported_name":"SEDAGHAT SHAWN","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":30203,"kind":"organization","name":"Trend International Holding AG","position":2,"cik":"0002040467","reported_name":"Trend International Holding AG","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-05-21T21:47:23.000Z","date":"2025-05-19","kind":"purchase","planned":false,"acquired":true,"shares":73577,"price":25.7272,"value":1892930.1944,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $25.66 to $25.80 inclusive. Mr. Sedaghat undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (4) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported herein are directly held by Swan Family Office, LLC (\"Swan Family Office\"). Mr. Sedaghat may be deemed to beneficially own the reported securities by virtue of the fact\nthat Mr. Sedaghat is the Managing Member of Swan Family Office. Each of Swan Family Office and Mr. Sedaghat disclaims beneficial ownership of the securities to which this filing relates for purposes\nof Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission\nthat either Swan Family Office or Mr. Sedaghat is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Trend (as defined in footnote (6) below) does not have beneficial ownership of these securities, and specifically disclaims beneficial ownership of these securities. This report shall not be deemed to\nbe an admission that Trend is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."}],"balance_after":1295692,"source":{"system":"sec-edgar","filing":"0000842633-25-000092","document":"wk-form4_1747864036.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000092/wk-form4_1747864036.xml","form_type":"4"}},{"id":1139634,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":30202,"kind":"person","name":"SEDAGHAT SHAWN","position":1,"cik":"0001321614","reported_name":"SEDAGHAT SHAWN","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":30203,"kind":"organization","name":"Trend International Holding AG","position":2,"cik":"0002040467","reported_name":"Trend International Holding AG","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-05-21T21:47:23.000Z","date":"2025-05-19","kind":"purchase","planned":false,"acquired":true,"shares":180823,"price":25.2528,"value":4566287.0544,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $24.665 to $25.65 inclusive. Shawn Sedaghat (\"Mr. Sedaghat\") undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported herein are directly held by Swan Family Office, LLC (\"Swan Family Office\"). Mr. Sedaghat may be deemed to beneficially own the reported securities by virtue of the fact\nthat Mr. Sedaghat is the Managing Member of Swan Family Office. Each of Swan Family Office and Mr. Sedaghat disclaims beneficial ownership of the securities to which this filing relates for purposes\nof Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission\nthat either Swan Family Office or Mr. Sedaghat is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Trend (as defined in footnote (6) below) does not have beneficial ownership of these securities, and specifically disclaims beneficial ownership of these securities. This report shall not be deemed to\nbe an admission that Trend is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."}],"balance_after":1222115,"source":{"system":"sec-edgar","filing":"0000842633-25-000092","document":"wk-form4_1747864036.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000092/wk-form4_1747864036.xml","form_type":"4"}},{"id":1139633,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":60854,"kind":"person","name":"Fielkow Jeffrey A","position":1,"cik":"0001968494","reported_name":"Fielkow Jeffrey A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-05-21T21:35:37.000Z","date":"2025-05-19","kind":"purchase","planned":false,"acquired":true,"shares":500,"price":24.98,"value":12490.0,"ownership":{"direct":true},"balance_after":15653,"source":{"system":"sec-edgar","filing":"0000842633-25-000088","document":"wk-form4_1747863329.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000088/wk-form4_1747863329.xml","form_type":"4"}},{"id":1150055,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":23541,"kind":"person","name":"Tredwell Daniel P","position":1,"cik":"0001399401","reported_name":"Tredwell Daniel P","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-05-14T20:47:41.000Z","date":"2025-05-12","kind":"purchase","planned":false,"acquired":true,"shares":94.848,"price":24.717,"value":2344.358016,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  These shares were purchased in multiple transactions at prices ranging from $24.716 to $24.717 inclusive.  The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4."}],"balance_after":60343.068,"source":{"system":"sec-edgar","filing":"0000842633-25-000084","document":"wk-form4_1747255654.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000084/wk-form4_1747255654.xml","form_type":"4"}},{"id":1161806,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":30202,"kind":"person","name":"SEDAGHAT SHAWN","position":1,"cik":"0001321614","reported_name":"SEDAGHAT SHAWN","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":30203,"kind":"organization","name":"Trend International Holding AG","position":2,"cik":"0002040467","reported_name":"Trend International Holding AG","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-05-02T21:29:01.000Z","date":"2025-05-01","kind":"purchase","planned":false,"acquired":true,"shares":16930,"price":23.987,"value":406099.91,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $23.885 to $24.00 inclusive. Mr. Sedaghat undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (4) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported herein are directly held by Swan Family Office, LLC (\"Swan Family Office\"). Mr. Sedaghat may be deemed to beneficially own the reported securities by virtue of the fact that Mr. Sedaghat is the Managing Member of Swan Family Office. Each of Swan Family Office and Mr. Sedaghat disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Swan Family Office or Mr. Sedaghat is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Trend (as defined in footnote (5) below) does not have beneficial ownership of these securities, and specifically disclaims beneficial ownership of these securities. This report shall not be deemed to be an admission that Trend is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."}],"balance_after":1041292,"source":{"system":"sec-edgar","filing":"0000842633-25-000082","document":"wk-form4_1746221335.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000082/wk-form4_1746221335.xml","form_type":"4"}},{"id":1161805,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":30202,"kind":"person","name":"SEDAGHAT SHAWN","position":1,"cik":"0001321614","reported_name":"SEDAGHAT SHAWN","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":30203,"kind":"organization","name":"Trend International Holding AG","position":2,"cik":"0002040467","reported_name":"Trend International Holding AG","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-05-02T21:29:01.000Z","date":"2025-04-30","kind":"purchase","planned":false,"acquired":true,"shares":123388,"price":23.829,"value":2940212.652,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $23.3125 to $24.00 inclusive. Shawn Sedaghat (\"Mr. Sedaghat\") undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities reported herein are directly held by Swan Family Office, LLC (\"Swan Family Office\"). Mr. Sedaghat may be deemed to beneficially own the reported securities by virtue of the fact that Mr. Sedaghat is the Managing Member of Swan Family Office. Each of Swan Family Office and Mr. Sedaghat disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Swan Family Office or Mr. Sedaghat is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Trend (as defined in footnote (5) below) does not have beneficial ownership of these securities, and specifically disclaims beneficial ownership of these securities. This report shall not be deemed to be an admission that Trend is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."}],"balance_after":1024362,"source":{"system":"sec-edgar","filing":"0000842633-25-000082","document":"wk-form4_1746221335.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000082/wk-form4_1746221335.xml","form_type":"4"}},{"id":1194121,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":14490,"kind":"person","name":"Finley Teresa","position":1,"cik":"0001630153","reported_name":"Finley Teresa","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CFO"}}],"security":"Common Stock","published_at":"2025-03-24T22:36:30.000Z","date":"2025-03-20","kind":"grant","planned":false,"acquired":true,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":78491.301,"source":{"system":"sec-edgar","filing":"0000842633-25-000071","document":"wk-form4_1742855784.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000071/wk-form4_1742855784.xml","form_type":"4"}},{"id":1202319,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":30202,"kind":"person","name":"SEDAGHAT SHAWN","position":1,"cik":"0001321614","reported_name":"SEDAGHAT SHAWN","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}},{"id":30203,"kind":"organization","name":"Trend International Holding AG","position":2,"cik":"0002040467","reported_name":"Trend International Holding AG","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2025-03-18T20:26:19.000Z","date":"2025-03-14","kind":"grant","planned":false,"acquired":true,"shares":4140,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"The 4,140 securities subject to the transaction reported herein (the \"Director Shares\") are directly held by Shawn Sedaghat (\"Mr. Sedaghat\"). Trend International Holding AG (\"Trend\") does not have beneficial ownership of the Director Shares, and specifically disclaims beneficial ownership of the Director Shares for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"). This report shall not be deemed to be an admission that Trend is the beneficial owner of the Director Shares for purposes of Section 16, or for any other purpose."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"4,170,667 of the securities reported in Table One, Column Five are held directly by Trend. Mr. Sedaghat (and together with Trend, the \"Reporting Persons\") may be deemed to beneficially own such reported securities by virtue of the fact that Mr. Sedaghat is the Chairman of the Board of, and controls, Trend. Each of Trend and Mr. Sedaghat disclaims beneficial ownership of such reported securities for purposes of Section 16, except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Reporting Person is the beneficial owner of such reported securities for purposes of Section 16, or for any other purpose."}],"balance_after":4174807,"source":{"system":"sec-edgar","filing":"0000842633-25-000067","document":"wk-form4_1742329571.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000067/wk-form4_1742329571.xml","form_type":"4"}},{"id":1202318,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":60854,"kind":"person","name":"Fielkow Jeffrey A","position":1,"cik":"0001968494","reported_name":"Fielkow Jeffrey A","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-03-18T20:23:19.000Z","date":"2025-03-14","kind":"grant","planned":false,"acquired":true,"shares":4140,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":15153,"source":{"system":"sec-edgar","filing":"0000842633-25-000065","document":"wk-form4_1742329390.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000065/wk-form4_1742329390.xml","form_type":"4"}},{"id":1202317,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":81862,"kind":"person","name":"GREENE JEFFREY M","position":1,"cik":"0001761809","reported_name":"GREENE JEFFREY M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-03-18T20:22:17.000Z","date":"2025-03-14","kind":"grant","planned":false,"acquired":true,"shares":4140,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":20628,"source":{"system":"sec-edgar","filing":"0000842633-25-000063","document":"wk-form4_1742329330.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263325000063/wk-form4_1742329330.xml","form_type":"4"}},{"id":1202316,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":34267,"kind":"person","name":"Parker Herbert K","position":1,"cik":"0001436496","reported_name":"Parker Herbert K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common 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Each of Swan Family Office and Mr. Sedaghat disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed to be an admission that either Swan Family Office or Mr. Sedaghat is the beneficial owner of such securities for purposes of Section 16, or for any other purpose."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Trend (as defined in footnote (5) below) does not have beneficial ownership of these securities, and specifically disclaims beneficial ownership of these securities. 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The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4."}],"balance_after":31923,"source":{"system":"sec-edgar","filing":"0000842633-24-000064","document":"wk-form4_1716497590.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263324000064/wk-form4_1716497590.xml","form_type":"4"}},{"id":1516648,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":23541,"kind":"person","name":"Tredwell Daniel P","position":1,"cik":"0001399401","reported_name":"Tredwell Daniel P","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-15T20:45:32.000Z","date":"2024-05-10","kind":"purchase","planned":false,"acquired":true,"shares":80.897,"price":26.796,"value":2167.716012,"ownership":{"direct":true},"balance_after":50841.968,"source":{"system":"sec-edgar","filing":"0000842633-24-000062","document":"wk-form4_1715805914.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263324000062/wk-form4_1715805914.xml","form_type":"4"}},{"id":1523887,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":34267,"kind":"person","name":"Parker Herbert K","position":1,"cik":"0001436496","reported_name":"Parker Herbert K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-08T22:10:15.000Z","date":"2024-05-08","kind":"purchase","planned":false,"acquired":true,"shares":6000,"price":26.2662,"value":157597.2,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  These shares were purchased in multiple transactions at prices ranging from $25.99 to $26.56 inclusive.  The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (2) to this Form 4."}],"balance_after":51157,"source":{"system":"sec-edgar","filing":"0000842633-24-000059","document":"wk-form4_1715206196.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263324000059/wk-form4_1715206196.xml","form_type":"4"}},{"id":1523886,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":34267,"kind":"person","name":"Parker Herbert K","position":1,"cik":"0001436496","reported_name":"Parker Herbert K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-08T22:10:15.000Z","date":"2024-05-07","kind":"purchase","planned":false,"acquired":true,"shares":6000,"price":26.01,"value":156060.0,"ownership":{"direct":true},"balance_after":45157,"source":{"system":"sec-edgar","filing":"0000842633-24-000059","document":"wk-form4_1715206196.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263324000059/wk-form4_1715206196.xml","form_type":"4"}},{"id":1523885,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":34267,"kind":"person","name":"Parker Herbert K","position":1,"cik":"0001436496","reported_name":"Parker Herbert K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-08T22:10:15.000Z","date":"2024-05-06","kind":"purchase","planned":false,"acquired":true,"shares":6100,"price":26.5228,"value":161789.08,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  These shares were purchased in multiple transactions at prices ranging from $26.49 to $26.69 inclusive.  The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4."}],"balance_after":39157,"source":{"system":"sec-edgar","filing":"0000842633-24-000059","document":"wk-form4_1715206196.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263324000059/wk-form4_1715206196.xml","form_type":"4"}},{"id":1529401,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":34267,"kind":"person","name":"Parker Herbert K","position":1,"cik":"0001436496","reported_name":"Parker Herbert K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-03T21:28:59.000Z","date":"2024-05-03","kind":"purchase","planned":false,"acquired":true,"shares":1500,"price":26.3412,"value":39511.8,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  These shares were purchased in multiple transactions at prices ranging from $26.315 to $26.37 inclusive.  The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (3) to this Form 4."}],"balance_after":33057,"source":{"system":"sec-edgar","filing":"0000842633-24-000057","document":"wk-form4_1714771729.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263324000057/wk-form4_1714771729.xml","form_type":"4"}},{"id":1529400,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":34267,"kind":"person","name":"Parker Herbert K","position":1,"cik":"0001436496","reported_name":"Parker Herbert K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-03T21:28:59.000Z","date":"2024-05-02","kind":"purchase","planned":false,"acquired":true,"shares":1500,"price":26.3123,"value":39468.45,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price.  These shares were purchased in multiple transactions at prices ranging from $26.27 to $26.33 inclusive.  The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (2) to this Form 4."}],"balance_after":31557,"source":{"system":"sec-edgar","filing":"0000842633-24-000057","document":"wk-form4_1714771729.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263324000057/wk-form4_1714771729.xml","form_type":"4"}},{"id":1529399,"issuer":{"id":4738,"kind":"organization","name":"TRIMAS CORP","symbol":"TRS"},"owners":[{"id":34267,"kind":"person","name":"Parker Herbert K","position":1,"cik":"0001436496","reported_name":"Parker Herbert K","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-05-03T21:28:59.000Z","date":"2024-05-01","kind":"purchase","planned":false,"acquired":true,"shares":1000,"price":25.9794,"value":25979.4,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  These shares were purchased in multiple transactions at prices ranging from $25.9387 to $26.02 inclusive.  The reporting person undertakes to provide to TriMas Corporation, any security holder of TriMas Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4."}],"balance_after":30057,"source":{"system":"sec-edgar","filing":"0000842633-24-000057","document":"wk-form4_1714771729.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/842633/000084263324000057/wk-form4_1714771729.xml","form_type":"4"}}],"next_cursor":"2024-05-03T21:28:59.000000Z,1529399"}