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This option is subject to accelerated vesting upon termination without cause upon a change of control of the Issuer."}],"balance_after":25000,"derivative":{"exercise_price":12.25,"expiration_date":"2027-01-17","underlying":"Common Stock","underlying_shares":25000},"source":{"system":"sec-edgar","filing":"0000899243-17-001669","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1552451/000089924317001669/doc4.xml","form_type":"4"}},{"id":4569110,"issuer":{"id":145206,"kind":"organization","name":"MyoKardia, Inc.","symbol":"MYOK"},"owners":[{"id":160964,"kind":"person","name":"Chan Steven","position":1,"cik":"0001654907","reported_name":"Chan Steven","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Stock Option (Right to Buy)","published_at":"2016-11-02T17:41:07.000Z","date":"2016-11-01","kind":"grant","acquired":true,"shares":2041,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On June 4, 2015, the Reporting Person was granted an option to purchase 8,163 shares of Common Stock under the issuer's 2012 Equity Incentive Plan, the vesting of which was subject to various conditions (other than the passage of time and continued employment) that were not tied to the market price of the issuer's securities. 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