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The reporting person undertakes to provide to Unum Therapeutics Inc., any security holder of Unum Therapeutics Inc., 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 this footnote."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-18-052358","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1622229/000120919118052358/doc4.xml","form_type":"4"}},{"id":3807048,"issuer":{"id":3793,"kind":"organization","name":"Cogent Biosciences, Inc.","symbol":"COGT"},"owners":[{"id":151694,"kind":"person","name":"Ettenberg Seth","position":1,"cik":"0001734419","reported_name":"Ettenberg Seth","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Scientific Officer"}}],"security":"Common Stock","published_at":"2018-09-26T22:41:06.000Z","date":"2018-09-25","kind":"exercise","acquired":true,"shares":11485,"price":0.18,"value":2067.3,"ownership":{"direct":true},"balance_after":11485,"source":{"system":"sec-edgar","filing":"0001209191-18-052358","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1622229/000120919118052358/doc4.xml","form_type":"4"}}]}