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The deemed disposition of the withheld shares is exempt pursuant to Rule 16b-3(e)."}],"balance_after":87255,"source":{"system":"sec-edgar","filing":"0001026655-25-000033","document":"wk-form4_1747315590.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665525000033/wk-form4_1747315590.xml","form_type":"4"}},{"id":1180640,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":79779,"kind":"person","name":"Zimmer John P","position":1,"cik":"0001591397","reported_name":"Zimmer John P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Treasurer, Secretary, CFO"}}],"security":"Common Stock","published_at":"2025-04-03T19:27:41.000Z","date":"2025-03-10","kind":"tax_withholding","planned":false,"acquired":false,"shares":2818,"price":13.52,"value":38099.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares of restricted stock withheld to satisfy the executive's tax withholding obligation upon vesting of restricted stock. The deemed disposition of the withheld shares is exempt pursuant to Rule 16b-3(e)."},{"field":"shares","element":"transactionShares","label":"F3","text":"This amendment is to correct the quantity for the reported transaction, which was incorrectly stated in the initial form 4 filed on March 14, 2025. The quantity withheld is 2,818 shares instead of 2,548  as initially stated."}],"balance_after":91114,"source":{"system":"sec-edgar","filing":"0001026655-25-000024","document":"wk-form4a_1743708455.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665525000024/wk-form4a_1743708455.xml","form_type":"4/A","original_submission_date":"2025-03-14"}},{"id":1180639,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":79779,"kind":"person","name":"Zimmer John P","position":1,"cik":"0001591397","reported_name":"Zimmer John P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Treasurer, Secretary, CFO"}}],"security":"Common Stock","published_at":"2025-04-03T19:27:41.000Z","date":"2025-03-07","kind":"tax_withholding","planned":false,"acquired":false,"shares":1927,"price":13.63,"value":26265.01,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares of restricted stock withheld to satisfy the executive's tax withholding obligation upon vesting of restricted stock. The deemed disposition of the withheld shares is exempt pursuant to Rule 16b-3(e)."},{"field":"shares","element":"transactionShares","label":"F2","text":"This amendment is to correct the quantity for the reported transaction, which was incorrectly stated in the initial form 4 filed on March 14, 2025. 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These shares were sold in multiple transactions at prices ranging from 17.60 to 17.70, inclusive. The reporting person undertakes to provide to Core Molding Technologies, Inc. or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":95859,"source":{"system":"sec-edgar","filing":"0001026655-24-000139","document":"wk-form4_1732718932.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665524000139/wk-form4_1732718932.xml","form_type":"4"}},{"id":1349917,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":79779,"kind":"person","name":"Zimmer John P","position":1,"cik":"0001591397","reported_name":"Zimmer John P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Treasurer, Secretary, CFO"}}],"security":"Common Stock","published_at":"2024-11-27T14:48:59.000Z","date":"2024-11-26","kind":"sale","planned":false,"acquired":false,"shares":10000,"price":17.7549,"value":177549.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price in Column 4 is a weighted average price. 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The reporting person undertakes to provide to Core Molding Technologies, Inc. or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":97959,"source":{"system":"sec-edgar","filing":"0001026655-24-000139","document":"wk-form4_1732718932.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665524000139/wk-form4_1732718932.xml","form_type":"4"}},{"id":1349916,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":79779,"kind":"person","name":"Zimmer John P","position":1,"cik":"0001591397","reported_name":"Zimmer John P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Treasurer, Secretary, CFO"}}],"security":"Common Stock","published_at":"2024-11-27T14:48:59.000Z","date":"2024-11-25","kind":"sale","planned":false,"acquired":false,"shares":7600,"price":17.7833,"value":135153.08,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 17.76 to 17.7997, inclusive. The reporting person undertakes to provide to Core Molding Technologies, Inc. or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":107959,"source":{"system":"sec-edgar","filing":"0001026655-24-000139","document":"wk-form4_1732718932.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665524000139/wk-form4_1732718932.xml","form_type":"4"}},{"id":1422301,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":79779,"kind":"person","name":"Zimmer John P","position":1,"cik":"0001591397","reported_name":"Zimmer John P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Treasurer, Secretary, CFO"}}],"security":"Common Stock","published_at":"2024-08-27T20:33:10.000Z","date":"2024-08-26","kind":"sale","planned":false,"acquired":false,"shares":13653,"price":18.2976,"value":249817.1328,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 18.0996 to 18.5978, inclusive. The reporting person undertakes to provide to Core Molding Technologies, Inc. or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":115559,"source":{"system":"sec-edgar","filing":"0001026655-24-000111","document":"wk-form4_1724790781.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665524000111/wk-form4_1724790781.xml","form_type":"4"}},{"id":1422300,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":79779,"kind":"person","name":"Zimmer John P","position":1,"cik":"0001591397","reported_name":"Zimmer John P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Treasurer, Secretary, CFO"}}],"security":"Common Stock","published_at":"2024-08-27T20:33:10.000Z","date":"2024-08-23","kind":"sale","planned":false,"acquired":false,"shares":2000,"price":18.641,"value":37282.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is a weighted average price. 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The reporting person undertakes to provide to Core Molding Technologies, Inc. or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":129212,"source":{"system":"sec-edgar","filing":"0001026655-24-000111","document":"wk-form4_1724790781.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665524000111/wk-form4_1724790781.xml","form_type":"4"}},{"id":1424558,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":79779,"kind":"person","name":"Zimmer John P","position":1,"cik":"0001591397","reported_name":"Zimmer John P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Treasurer, Secretary, CFO"}}],"security":"Common Stock","published_at":"2024-08-23T20:16:30.000Z","date":"2024-08-23","kind":"sale","planned":false,"acquired":false,"shares":14681,"price":18.0426,"value":264883.4106,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price in Column 4 is a weighted average price. 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The reporting person undertakes to provide to Core Molding Technologies, Inc. or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":131212,"source":{"system":"sec-edgar","filing":"0001026655-24-000106","document":"wk-form4_1724444184.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665524000106/wk-form4_1724444184.xml","form_type":"4"}},{"id":1424557,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":79779,"kind":"person","name":"Zimmer John P","position":1,"cik":"0001591397","reported_name":"Zimmer John P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Treasurer, Secretary, CFO"}}],"security":"Common Stock","published_at":"2024-08-23T20:16:30.000Z","date":"2024-08-22","kind":"sale","planned":false,"acquired":false,"shares":8022,"price":17.919,"value":143746.218,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price in Column 4 is a weighted average price. 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The reporting person undertakes to provide to Core Molding Technologies, Inc. or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":157628,"source":{"system":"sec-edgar","filing":"0001026655-24-000090","document":"wk-form4_1717107147.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665524000090/wk-form4_1717107147.xml","form_type":"4"}},{"id":1512261,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":79779,"kind":"person","name":"Zimmer John P","position":1,"cik":"0001591397","reported_name":"Zimmer John P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Treasurer, Secretary, CFO"}}],"security":"Common Stock","published_at":"2024-05-17T21:47:25.000Z","date":"2024-05-17","kind":"sale","planned":false,"acquired":false,"shares":8834,"price":20.0144,"value":176807.2096,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is a weighted average price. 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