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These shares were sold in multiple transactions at prices ranging from 24.0 to 24.2, 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":92543,"source":{"system":"sec-edgar","filing":"0001249659-26-000011","document":"wk-form4_1782421361.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965926000011/wk-form4_1782421361.xml","form_type":"4"}},{"id":726896,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-25T21:02:44.000Z","date":"2026-06-23","kind":"sale","planned":false,"acquired":false,"shares":513,"price":24.0178,"value":12321.1314,"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 24.0 to 24.04, 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":93293,"source":{"system":"sec-edgar","filing":"0001249659-26-000011","document":"wk-form4_1782421361.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965926000011/wk-form4_1782421361.xml","form_type":"4"}},{"id":730983,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-22T21:04:40.000Z","date":"2026-06-18","kind":"sale","planned":false,"acquired":false,"shares":12,"price":24,"value":288.0,"ownership":{"direct":true},"balance_after":93806,"source":{"system":"sec-edgar","filing":"0001249659-26-000009","document":"wk-form4_1782162278.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965926000009/wk-form4_1782162278.xml","form_type":"4"}},{"id":730982,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-22T21:04:40.000Z","date":"2026-06-17","kind":"sale","planned":false,"acquired":false,"shares":2495,"price":24.0017,"value":59884.2415,"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 24.0 to 24.03, 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":93818,"source":{"system":"sec-edgar","filing":"0001249659-26-000009","document":"wk-form4_1782162278.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965926000009/wk-form4_1782162278.xml","form_type":"4"}},{"id":734927,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-17T21:02:02.000Z","date":"2026-06-16","kind":"sale","planned":false,"acquired":false,"shares":80,"price":24,"value":1920.0,"ownership":{"direct":true},"balance_after":96313,"source":{"system":"sec-edgar","filing":"0001249659-26-000007","document":"wk-form4_1781730119.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965926000007/wk-form4_1781730119.xml","form_type":"4"}},{"id":734926,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-17T21:02:02.000Z","date":"2026-06-15","kind":"sale","planned":false,"acquired":false,"shares":2000,"price":25.0672,"value":50134.4,"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 24.9 to 25.25, 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":96393,"source":{"system":"sec-edgar","filing":"0001249659-26-000007","document":"wk-form4_1781730119.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965926000007/wk-form4_1781730119.xml","form_type":"4"}},{"id":738338,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-15T20:27:08.000Z","date":"2026-06-12","kind":"sale","planned":false,"acquired":false,"shares":3000,"price":24.7706,"value":74311.8,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"1. 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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":98393,"source":{"system":"sec-edgar","filing":"0001249659-26-000005","document":"wk-form4_1781555225.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965926000005/wk-form4_1781555225.xml","form_type":"4"}},{"id":738337,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-06-15T20:27:08.000Z","date":"2026-06-11","kind":"sale","planned":false,"acquired":false,"shares":900,"price":24.2276,"value":21804.84,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"1. The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 24.1 to 24.355, 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":101393,"source":{"system":"sec-edgar","filing":"0001249659-26-000005","document":"wk-form4_1781555225.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965926000005/wk-form4_1781555225.xml","form_type":"4"}},{"id":844589,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-13T17:37:44.000Z","date":"2026-03-11","kind":"grant","planned":false,"acquired":true,"shares":6128,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":102293,"source":{"system":"sec-edgar","filing":"0001249659-26-000003","document":"wk-form4_1773423461.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965926000003/wk-form4_1773423461.xml","form_type":"4"}},{"id":1054848,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-08-27T18:47:52.000Z","date":"2025-08-26","kind":"sale","planned":false,"acquired":false,"shares":3103,"price":18.6411,"value":57843.3333,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F2","text":"The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 18.50 to 18.84, 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":96165,"source":{"system":"sec-edgar","filing":"0001249659-25-000006","document":"wk-form4_1756320469.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965925000006/wk-form4_1756320469.xml","form_type":"4"}},{"id":1054847,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-08-27T18:47:52.000Z","date":"2025-08-25","kind":"sale","planned":false,"acquired":false,"shares":6897,"price":18.8853,"value":130251.9141,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from 18.735 to 19.47, 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":99268,"source":{"system":"sec-edgar","filing":"0001249659-25-000006","document":"wk-form4_1756320469.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000124965925000006/wk-form4_1756320469.xml","form_type":"4"}},{"id":1206395,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-03-14T21:23:59.000Z","date":"2025-03-11","kind":"grant","planned":false,"acquired":true,"shares":9020,"price":12.81,"value":115546.2,"ownership":{"direct":true},"balance_after":106165,"source":{"system":"sec-edgar","filing":"0001026655-25-000013","document":"wk-form4_1741987433.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665525000013/wk-form4_1741987433.xml","form_type":"4"}},{"id":1587681,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-03-08T18:10:52.000Z","date":"2024-03-07","kind":"grant","planned":false,"acquired":true,"shares":6022,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":97145,"source":{"system":"sec-edgar","filing":"0001026655-24-000013","document":"wk-form4_1709921443.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665524000013/wk-form4_1709921443.xml","form_type":"4"}},{"id":1807632,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-08-15T20:24:35.000Z","date":"2023-08-11","kind":"sale","planned":false,"acquired":false,"shares":15000,"price":26.8,"value":402000.0,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The date in Column 2 is the earliest transaction date. These shares were purchased over multiple days, 8/11/2023 and 8/14/2023, inclusive. The reporting person undertakes to provide to Core Molding Technologies, Inc. or the staff of the Securities Exchange Commission, upon request."},{"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 25.79 to 27.52, 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":91123,"source":{"system":"sec-edgar","filing":"0001026655-23-000146","document":"wk-form4_1692131062.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665523000146/wk-form4_1692131062.xml","form_type":"4"}},{"id":1877031,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-05-26T12:24:08.000Z","date":"2023-05-15","kind":"sale","planned":true,"acquired":false,"shares":21643,"price":19.49,"value":421822.07,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The date in Column 2 is the earliest transaction date. These shares were purchased over multiple days, 05/15/2023 and 05/16/2023, inclusive. The reporting person undertakes to provide to Core Molding Technologies, Inc. or the staff of the Securities Exchange Commission, upon request."},{"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 May 16, 2023. The quantity sold is 21,643 shares instead of 21,463 as initially stated."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from 18.75 to 20.30, 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 purchased at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":105943,"source":{"system":"sec-edgar","filing":"0001026655-23-000108","document":"wk-form4a_1685103837.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665523000108/wk-form4a_1685103837.xml","form_type":"4/A","original_submission_date":"2023-05-16"}},{"id":1892134,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2023-05-16T20:59:56.000Z","date":"2023-05-15","kind":"sale","planned":false,"acquired":false,"shares":21463,"price":19.49,"value":418313.87,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"The date in Column 2 is the earliest transaction date. These shares were purchased over multiple days, 5/15/2023  and 5/16/2023, inclusive. The reporting person undertakes to provide to Core Molding Technologies, Inc. or the staff of the Securities Exchange Commission, upon request."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from 18.75 to 20.30, 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 purchased at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":106123,"source":{"system":"sec-edgar","filing":"0001026655-23-000081","document":"wk-form4_1684270785.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1026655/000102665523000081/wk-form4_1684270785.xml","form_type":"4"}},{"id":1895555,"issuer":{"id":6229,"kind":"organization","name":"CORE MOLDING TECHNOLOGIES INC"},"owners":[{"id":35473,"kind":"person","name":"CELLITTI THOMAS R","position":1,"cik":"0001249659","reported_name":"CELLITTI THOMAS R","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Appreciation Right","published_at":"2023-05-12T14:41:15.000Z","date":"2023-05-11","kind":"exercise","planned":true,"acquired":false,"shares":6722,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Granted as Stock Appreciation Rights (SARs) under the 2006 Long-Term Equity Incentive Plan. 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