{"transactions":[{"id":2935812,"issuer":{"id":5564,"kind":"organization","name":"908 Devices Inc.","symbol":"MASS"},"owners":[{"id":144491,"kind":"person","name":"Ramsey John Michael","position":1,"cik":"0001836529","reported_name":"Ramsey John Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Stock Option (option to buy)","published_at":"2020-12-22T00:02:43.000Z","date":"2020-12-17","kind":"grant","acquired":true,"shares":14410,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following December 17, 2020, subject to the reporting person's continued service through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The shares underlying the option become vested and exercisable in substantially equal monthly installments over the 36 months following December 17, 2020, subject to the reporting person's continued service through the applicable vesting date."}],"balance_after":14410,"derivative":{"exercise_price":20,"underlying":"Common Stock, par value $0.001","underlying_shares":14410},"source":{"system":"sec-edgar","filing":"0001104659-20-138180","document":"tm2039029-3_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1555279/000110465920138180/tm2039029-3_4seq1.xml","form_type":"4"}}]}