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The price reported above reflects the weighted average sale price. 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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 sold at each separate price within the ranges set forth in this footnote."}],"balance_after":12778,"source":{"system":"sec-edgar","filing":"0001179110-20-008423","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1235010/000117911020008423/edgar.xml","form_type":"4"}},{"id":3076833,"issuer":{"id":146313,"kind":"organization","name":"MOMENTA PHARMACEUTICALS INC","symbol":"MNTA"},"owners":[{"id":34399,"kind":"person","name":"Manning Anthony M.","position":1,"cik":"0001716468","reported_name":"Manning Anthony M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2020-07-23T16:08:33.000Z","date":"2020-07-21","kind":"sale","acquired":false,"shares":194,"price":34.67,"value":6725.98,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person December 14, 2018."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $34.25 to $34.94. 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 sold at each separate price within the ranges set forth in this footnote."}],"balance_after":14523,"source":{"system":"sec-edgar","filing":"0001179110-20-008423","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1235010/000117911020008423/edgar.xml","form_type":"4"}},{"id":3078648,"issuer":{"id":146313,"kind":"organization","name":"MOMENTA PHARMACEUTICALS INC","symbol":"MNTA"},"owners":[{"id":34399,"kind":"person","name":"Manning Anthony M.","position":1,"cik":"0001716468","reported_name":"Manning Anthony M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2020-07-21T16:03:23.000Z","date":"2020-07-20","kind":"exercise","acquired":false,"shares":33125,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."}],"balance_after":52793,"derivative":{"exercise_price":12.76,"exercise_date":"2020-05-11","expiration_date":"2029-02-11","underlying":"Common Stock","underlying_shares":33125},"source":{"system":"sec-edgar","filing":"0001179110-20-008396","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1235010/000117911020008396/edgar.xml","form_type":"4"}},{"id":3078647,"issuer":{"id":146313,"kind":"organization","name":"MOMENTA PHARMACEUTICALS INC","symbol":"MNTA"},"owners":[{"id":34399,"kind":"person","name":"Manning Anthony M.","position":1,"cik":"0001716468","reported_name":"Manning Anthony M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Restricted Stock Units","published_at":"2020-07-21T16:03:23.000Z","date":"2020-07-17","kind":"exercise","acquired":false,"shares":3500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Restricted Stock Units convert into common stock on a one-for-one basis."},{"field":"kind","element":"transactionCoding","label":"F1","text":"Shares received pursuant to settlement of Restricted Stock Units that were granted on October 17, 2018."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Subject to the officer's continued employment with the company, the restricted stock units will vest with respect to 25% of the shares on the first anniversary of the grant date, and the remainder will vest in equal quarterly installments over the subsequent three years."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Subject to the officer's continued employment with the company, the restricted stock units will vest with respect to 25% of the shares on the first anniversary of the grant date, and the remainder will vest in equal quarterly installments over the subsequent three years."}],"balance_after":31500,"derivative":{"underlying":"Common Stock","underlying_shares":3500},"source":{"system":"sec-edgar","filing":"0001179110-20-008396","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1235010/000117911020008396/edgar.xml","form_type":"4"}},{"id":3078646,"issuer":{"id":146313,"kind":"organization","name":"MOMENTA PHARMACEUTICALS INC","symbol":"MNTA"},"owners":[{"id":34399,"kind":"person","name":"Manning Anthony M.","position":1,"cik":"0001716468","reported_name":"Manning Anthony M.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2020-07-21T16:03:23.000Z","date":"2020-07-20","kind":"sale","acquired":false,"shares":49538,"price":33.91,"value":1679833.58,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $33.22 to $34.28. 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