SEC Form 4 · accession 0000899243-15-007644

MyoKardia Inc · MYOK

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Kevin P Starr

Director · 10% Owner

Period of report

Nov 3, 2015

Accepted (ET)

Nov 5, 2015 · 4:30 pm EST

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001552451

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2,F3	Nov 3, 2015	C	8,843,537	—	A	9,387,754	I	By Third Rock Ventures II, L.P.
Common Stock^F1,F2,F4	Nov 3, 2015	C	1,496,598	—	A	1,496,598	I	By Third Rock Ventures III, L.P.

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Series A Preferred Stock^F3,F1	—	Nov 3, 2015	C	32,500,000	D	—	—	Common Stock	8,843,537	0	I
Series A Preferred Stock^F4,F1	—	Nov 3, 2015	C	5,500,000	D	—	—	Common Stock	1,496,598	0	I

Explanation of responses

F1The shares of Issuer's Series A Preferred Stock beneficially owned by the Reporting Person converted into Common Stock on a 1-for-3.675 basis immediately prior to the closing of the Issuer's initial public offering and has no expiration date.
F2Reflects the conversion of the Issuer's Preferred Stock into Common Stock on a 1-for-3.675 basis, which became effective immediately prior to the closing of the Issuer's initial public offering.
F3The shares are directly held by Third Rock Ventures II, L.P. ("TRV"). The general partner of TRV is Third Rock Ventures GP II, L.P. ("TRV GP"). The general partner of TRV GP is TRV GP II, LLC ("TRV GP LLC"). The individual managers of TRV GP LLC are Mark Levin ("Levin"), Kevin Starr ("Starr") and Dr. Robert Tepper ("Tepper") and, as such, each of TRV GP, TRV GP LLC, Levin, Starr and Tepper exercises shared voting and investment power over the shares held of record by TRV. Each of the Reporting Persons disclaims beneficial ownership of the shares except to the extent of their pecuniary interest therein, if any.
F4The shares are directly held by Third Rock Ventures III, L.P. ("TRV"). The general partner of TRV is Third Rock Ventures GP III, L.P. ("TRV GP"). The general partner of TRV GP is TRV GP III, LLC ("TRV GP LLC"). The individual managers of TRV GP LLC are Mark Levin ("Levin"), Kevin Starr ("Starr") and Dr. Robert Tepper ("Tepper") and, as such, each of TRV GP, TRV GP LLC, Levin, Starr and Tepper exercises shared voting and investment power over the shares held of record by TRV. Each of the Reporting Persons disclaims beneficial ownership of the shares except to the extent of their pecuniary interest therein, if any.