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This Amendment does make any other changes to the Original Form 4."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Grant of option to buy shares of Issuer common stock that becomes exercisable in four annual installments beginning February 14, 2027."}],"balance_after":13667,"derivative":{"exercise_price":617.2,"expiration_date":"2036-02-11","underlying":"Common Stock","underlying_shares":13667},"source":{"system":"sec-edgar","filing":"0000874716-26-000046","document":"wk-form4a_1772592318.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/874716/000087471626000046/wk-form4a_1772592318.xml","form_type":"4/A","original_submission_date":"2026-02-17"}},{"id":875539,"issuer":{"id":3057,"kind":"organization","name":"IDEXX LABORATORIES INC /DE","symbol":"IDXX"},"owners":[{"id":33115,"kind":"person","name":"MAZELSKY JONATHAN JAY","position":1,"cik":"0001556270","reported_name":"MAZELSKY JONATHAN JAY","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Incentive Stock Option (right-to-buy)","published_at":"2026-03-02T22:00:21.000Z","date":"2026-02-27","kind":"exercise","planned":false,"acquired":false,"shares":197,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F15","text":"Grant of option to buy shares of Issuer common stock that vested on February 14, 2026."}],"balance_after":0,"derivative":{"exercise_price":505.53,"expiration_date":"2032-02-13","underlying":"Common Stock","underlying_shares":197},"source":{"system":"sec-edgar","filing":"0000874716-26-000043","document":"wk-form4_1772488807.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/874716/000087471626000043/wk-form4_1772488807.xml","form_type":"4"}},{"id":875538,"issuer":{"id":3057,"kind":"organization","name":"IDEXX LABORATORIES INC /DE","symbol":"IDXX"},"owners":[{"id":33115,"kind":"person","name":"MAZELSKY JONATHAN JAY","position":1,"cik":"0001556270","reported_name":"MAZELSKY JONATHAN JAY","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Non-Qualified Stock Option (right-to-buy)","published_at":"2026-03-02T22:00:21.000Z","date":"2026-02-26","kind":"exercise","planned":false,"acquired":false,"shares":23326,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F14","text":"Grant of option to buy shares of Issuer common stock that vested in five annual installments beginning February 14, 2018."}],"balance_after":0,"derivative":{"exercise_price":141.6,"expiration_date":"2027-02-13","underlying":"Common Stock","underlying_shares":23326},"source":{"system":"sec-edgar","filing":"0000874716-26-000043","document":"wk-form4_1772488807.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/874716/000087471626000043/wk-form4_1772488807.xml","form_type":"4"}},{"id":875537,"issuer":{"id":3057,"kind":"organization","name":"IDEXX LABORATORIES INC /DE","symbol":"IDXX"},"owners":[{"id":33115,"kind":"person","name":"MAZELSKY JONATHAN JAY","position":1,"cik":"0001556270","reported_name":"MAZELSKY JONATHAN JAY","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-03-02T22:00:21.000Z","date":"2026-02-27","kind":"exercise","planned":false,"acquired":true,"shares":197,"price":505.53,"value":99589.41,"ownership":{"direct":true},"balance_after":83803.302,"source":{"system":"sec-edgar","filing":"0000874716-26-000043","document":"wk-form4_1772488807.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/874716/000087471626000043/wk-form4_1772488807.xml","form_type":"4"}},{"id":875536,"issuer":{"id":3057,"kind":"organization","name":"IDEXX LABORATORIES INC /DE","symbol":"IDXX"},"owners":[{"id":33115,"kind":"person","name":"MAZELSKY JONATHAN JAY","position":1,"cik":"0001556270","reported_name":"MAZELSKY JONATHAN JAY","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-03-02T22:00:21.000Z","date":"2026-02-26","kind":"sale","planned":false,"acquired":false,"shares":2589,"price":663.0439,"value":1716620.6571,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F13","text":"Represents the weighted average price of the shares sold ranging from a low of $662.72 to a high of $663.505 per share. 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The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price."}],"balance_after":88395.302,"source":{"system":"sec-edgar","filing":"0000874716-26-000043","document":"wk-form4_1772488807.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/874716/000087471626000043/wk-form4_1772488807.xml","form_type":"4"}},{"id":875532,"issuer":{"id":3057,"kind":"organization","name":"IDEXX LABORATORIES INC /DE","symbol":"IDXX"},"owners":[{"id":33115,"kind":"person","name":"MAZELSKY JONATHAN JAY","position":1,"cik":"0001556270","reported_name":"MAZELSKY JONATHAN JAY","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-03-02T22:00:21.000Z","date":"2026-02-26","kind":"sale","planned":false,"acquired":false,"shares":3660,"price":658.9166,"value":2411634.756,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F9","text":"Represents the weighted average price of the shares sold ranging from a low of $658.30 to a high of $659.24 per share. 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