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This sale occurred pursuant to a 10b5-1 trading plan adopted on August 19, 2024."}],"balance_after":5575,"source":{"system":"sec-edgar","filing":"0001127602-25-014711","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760225014711/form4.xml","form_type":"4"}},{"id":1145915,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-05-16T20:29:33.000Z","date":"2025-05-15","kind":"sale","planned":true,"acquired":false,"shares":81,"price":137.68,"value":11152.08,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $137.19 to $138.12. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This sale occurred pursuant to a 10b5-1 trading plan adopted on August 19, 2024."}],"balance_after":5599,"source":{"system":"sec-edgar","filing":"0001127602-25-014711","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760225014711/form4.xml","form_type":"4"}},{"id":1145914,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-05-16T20:29:33.000Z","date":"2025-05-15","kind":"sale","planned":true,"acquired":false,"shares":35,"price":136.32,"value":4771.2,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $136.07 to $136.97. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. 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The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This sale occurred pursuant to a 10b5-1 trading plan adopted on August 19, 2024."}],"balance_after":5722,"source":{"system":"sec-edgar","filing":"0001127602-25-014486","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760225014486/form4.xml","form_type":"4"}},{"id":1147887,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-05-15T20:41:58.000Z","date":"2025-05-14","kind":"sale","planned":true,"acquired":false,"shares":14,"price":141.85,"value":1985.9,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $141.80 to $141.90. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This sale occurred pursuant to a 10b5-1 trading plan adopted on August 19, 2024."}],"balance_after":5729,"source":{"system":"sec-edgar","filing":"0001127602-25-014486","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760225014486/form4.xml","form_type":"4"}},{"id":1147886,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-05-15T20:41:58.000Z","date":"2025-05-14","kind":"sale","planned":true,"acquired":false,"shares":21,"price":140.78,"value":2956.38,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $140.52 to $141.20. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This sale occurred pursuant to a 10b5-1 trading plan adopted on August 19, 2024."}],"balance_after":5743,"source":{"system":"sec-edgar","filing":"0001127602-25-014486","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760225014486/form4.xml","form_type":"4"}},{"id":1147885,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2025-05-15T20:41:58.000Z","date":"2025-05-14","kind":"sale","planned":true,"acquired":false,"shares":91,"price":139.95,"value":12735.45,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $139.47 to $140.47. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This sale occurred pursuant to a 10b5-1 trading plan adopted on August 19, 2024."}],"balance_after":5764,"source":{"system":"sec-edgar","filing":"0001127602-25-014486","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760225014486/form4.xml","form_type":"4"}},{"id":1514668,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-05-16T20:35:50.000Z","date":"2024-05-15","kind":"sale","planned":true,"acquired":false,"shares":96,"price":236.78,"value":22730.88,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $236.36 to $237.18. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This sale occurred pursuant to a 10b5-1 trading plan."}],"balance_after":5855,"source":{"system":"sec-edgar","filing":"0001127602-24-015691","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760224015691/form4.xml","form_type":"4"}},{"id":1514667,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2024-05-16T20:35:50.000Z","date":"2024-05-15","kind":"sale","planned":true,"acquired":false,"shares":113,"price":235.61,"value":26623.93,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $235.35 to $236.16. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. 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The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. 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The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":4743,"source":{"system":"sec-edgar","filing":"0001127602-22-014132","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760222014132/form4.xml","form_type":"4"}},{"id":2275066,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2022-05-11T19:52:19.000Z","date":"2022-05-09","kind":"sale","acquired":false,"shares":24,"price":228.62,"value":5486.88,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $228.22 to $228.62. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":4831,"source":{"system":"sec-edgar","filing":"0001127602-22-014132","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760222014132/form4.xml","form_type":"4"}},{"id":2583972,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Stock Options (Right to Buy)","published_at":"2021-09-01T18:29:25.000Z","date":"2021-08-31","kind":"exercise","acquired":false,"shares":2539,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":164.24,"exercise_date":"2021-05-11","expiration_date":"2030-05-11","underlying":"Common Stock","underlying_shares":2539},"source":{"system":"sec-edgar","filing":"0001127602-21-024662","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221024662/form4.xml","form_type":"4"}},{"id":2583971,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-09-01T18:29:25.000Z","date":"2021-08-31","kind":"sale","acquired":false,"shares":983,"price":442.9883,"value":435457.4989,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $442.725 to $443.265. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":4855,"source":{"system":"sec-edgar","filing":"0001127602-21-024662","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221024662/form4.xml","form_type":"4"}},{"id":2583970,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-09-01T18:29:25.000Z","date":"2021-08-31","kind":"sale","acquired":false,"shares":1556,"price":442.1592,"value":687999.7152,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $441.67 to $442.65. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":5838,"source":{"system":"sec-edgar","filing":"0001127602-21-024662","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221024662/form4.xml","form_type":"4"}},{"id":2583969,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-09-01T18:29:25.000Z","date":"2021-08-31","kind":"exercise","acquired":true,"shares":2539,"price":164.24,"value":417005.36,"ownership":{"direct":true},"balance_after":7394,"source":{"system":"sec-edgar","filing":"0001127602-21-024662","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221024662/form4.xml","form_type":"4"}},{"id":2583968,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-09-01T18:29:25.000Z","date":"2021-08-09","kind":"gift","acquired":false,"shares":500,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":4855,"source":{"system":"sec-edgar","filing":"0001127602-21-024662","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221024662/form4.xml","form_type":"4"}},{"id":2716914,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-05-12T20:45:24.000Z","date":"2021-05-11","kind":"sale","acquired":false,"shares":1,"price":323.29,"value":323.29,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."}],"balance_after":5355,"source":{"system":"sec-edgar","filing":"0001127602-21-016416","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221016416/form4.xml","form_type":"4"}},{"id":2716913,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-05-12T20:45:24.000Z","date":"2021-05-11","kind":"sale","acquired":false,"shares":110,"price":321.0557,"value":35316.127,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $320.79 to $321.46. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":5356,"source":{"system":"sec-edgar","filing":"0001127602-21-016416","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221016416/form4.xml","form_type":"4"}},{"id":2716912,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-05-12T20:45:24.000Z","date":"2021-05-11","kind":"sale","acquired":false,"shares":174,"price":320.1908,"value":55713.1992,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $319.76 to $320.685. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":5466,"source":{"system":"sec-edgar","filing":"0001127602-21-016416","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221016416/form4.xml","form_type":"4"}},{"id":2716911,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-05-12T20:45:24.000Z","date":"2021-05-11","kind":"sale","acquired":false,"shares":56,"price":319.4243,"value":17887.7608,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $319.23 to $319.695. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":5640,"source":{"system":"sec-edgar","filing":"0001127602-21-016416","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221016416/form4.xml","form_type":"4"}},{"id":2716910,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-05-12T20:45:24.000Z","date":"2021-05-11","kind":"sale","acquired":false,"shares":30,"price":316.745,"value":9502.35,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."}],"balance_after":5696,"source":{"system":"sec-edgar","filing":"0001127602-21-016416","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221016416/form4.xml","form_type":"4"}},{"id":2721344,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Stock Options (Right to Buy)","published_at":"2021-05-10T21:33:22.000Z","date":"2021-05-07","kind":"grant","acquired":true,"shares":1151,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"The Stock Options become exercisable upon the earlier of 5/7/2022 or the business day prior to the Company's next annual meeting of shareholders."}],"balance_after":1151,"derivative":{"exercise_price":342.55,"exercise_date":"2022-05-07","expiration_date":"2031-05-07","underlying":"Common Stock","underlying_shares":1151},"source":{"system":"sec-edgar","filing":"0001127602-21-016111","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221016111/form4.xml","form_type":"4"}},{"id":2721343,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-05-10T21:33:22.000Z","date":"2021-05-07","kind":"grant","acquired":true,"shares":355,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The unvested restricted stock units vest upon the earlier of 5/7/2022 or the business day prior to the Company's next annual meeting of shareholders."}],"balance_after":5726,"source":{"system":"sec-edgar","filing":"0001127602-21-016111","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221016111/form4.xml","form_type":"4"}},{"id":2723564,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-05-07T17:23:09.000Z","date":"2021-05-06","kind":"sale","acquired":false,"shares":600,"price":338.9767,"value":203386.02,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $338.71 to $339.15. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":5371,"source":{"system":"sec-edgar","filing":"0001127602-21-015816","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221015816/form4.xml","form_type":"4"}},{"id":2723563,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-05-07T17:23:09.000Z","date":"2021-05-06","kind":"sale","acquired":false,"shares":288,"price":338.0635,"value":97362.288,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $338.05 to $338.16. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":5971,"source":{"system":"sec-edgar","filing":"0001127602-21-015816","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221015816/form4.xml","form_type":"4"}},{"id":2723562,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-05-07T17:23:09.000Z","date":"2021-05-06","kind":"sale","acquired":false,"shares":910,"price":336.8376,"value":306522.216,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $336.55 to $337.15. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":6259,"source":{"system":"sec-edgar","filing":"0001127602-21-015816","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221015816/form4.xml","form_type":"4"}},{"id":2723561,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-05-07T17:23:09.000Z","date":"2021-05-06","kind":"sale","acquired":false,"shares":1572,"price":336.0625,"value":528290.25,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $335.54 to $336.50. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":7169,"source":{"system":"sec-edgar","filing":"0001127602-21-015816","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221015816/form4.xml","form_type":"4"}},{"id":2886410,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2021-02-02T16:57:24.000Z","date":"2020-11-23","kind":"gift","acquired":false,"shares":700,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":8741,"source":{"system":"sec-edgar","filing":"0001127602-21-003437","document":"form5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760221003437/form5.xml","form_type":"5"}},{"id":3031607,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2020-09-15T21:47:02.000Z","date":"2020-09-14","kind":"sale","acquired":false,"shares":70,"price":220.7789,"value":15454.523,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $220.725 to $220.79. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":9441,"source":{"system":"sec-edgar","filing":"0001127602-20-025127","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760220025127/form4.xml","form_type":"4"}},{"id":3031606,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2020-09-15T21:47:02.000Z","date":"2020-09-14","kind":"sale","acquired":false,"shares":1288,"price":220.1503,"value":283553.5864,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $219.72 to $220.61. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":9511,"source":{"system":"sec-edgar","filing":"0001127602-20-025127","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760220025127/form4.xml","form_type":"4"}},{"id":3031605,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2020-09-15T21:47:02.000Z","date":"2020-09-14","kind":"sale","acquired":false,"shares":585,"price":219.2743,"value":128275.4655,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $218.63 to $219.61. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":10799,"source":{"system":"sec-edgar","filing":"0001127602-20-025127","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760220025127/form4.xml","form_type":"4"}},{"id":3031604,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2020-09-15T21:47:02.000Z","date":"2020-08-07","kind":"gift","acquired":false,"shares":500,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":11384,"source":{"system":"sec-edgar","filing":"0001127602-20-025127","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760220025127/form4.xml","form_type":"4"}},{"id":3135571,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2020-05-26T18:37:19.000Z","date":"2020-05-22","kind":"sale","acquired":false,"shares":83,"price":174.75,"value":14504.25,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."}],"balance_after":11884,"source":{"system":"sec-edgar","filing":"0001127602-20-017883","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760220017883/form4.xml","form_type":"4"}},{"id":3135570,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2020-05-26T18:37:19.000Z","date":"2020-05-22","kind":"sale","acquired":false,"shares":255,"price":173.874,"value":44337.87,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $173.575 to $174.43. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":11967,"source":{"system":"sec-edgar","filing":"0001127602-20-017883","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760220017883/form4.xml","form_type":"4"}},{"id":3135569,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Common Stock","published_at":"2020-05-26T18:37:19.000Z","date":"2020-05-22","kind":"sale","acquired":false,"shares":603,"price":173.0117,"value":104326.0551,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This sale occurred pursuant to a 10b5-1 Trading Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $172.46 to $173.40. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":12222,"source":{"system":"sec-edgar","filing":"0001127602-20-017883","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1100682/000112760220017883/form4.xml","form_type":"4"}},{"id":3153398,"issuer":{"id":3398,"kind":"organization","name":"CHARLES RIVER LABORATORIES INTERNATIONAL, INC.","symbol":"CRL"},"owners":[{"id":79702,"kind":"person","name":"MASSARO GEORGE","position":1,"cik":"0001221496","reported_name":"MASSARO GEORGE","relationship":{"director":true}}],"security":"Stock Options (Right to 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These shares were sold in multiple transactions at prices ranging from $49.91 to $50.13. The undersigned undertakes to provide Huron Consulting Group Inc. 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These shares were sold in multiple transactions at prices ranging from $46.93 to $47.56. The undersigned undertakes to provide Huron Consulting Group Inc. (\"Huron\"), any security holder of Huron 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 (2) to this Form 4."}],"balance_after":19121,"source":{"system":"sec-edgar","filing":"0001567619-19-008293","document":"doc1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1289848/000156761919008293/doc1.xml","form_type":"4"}}],"next_cursor":"2019-04-03T18:08:33.000000Z,3564318"}