Sanofi — Director's Dealing 2015

Nov 5, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MyoKardia Inc (MYOK)
CIK: 0001552451
Period of Report: 2015-11-03

Reporting Person: Sanofi (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-11-03	Common stock Par value per share $ 0.0001	C	2318899	—	Acquired	2318899	Indirect
2015-11-03	Common stock Par value per share $ 0.0001	P	900000	$10	Acquired	3218899	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-11-03	Series A-1 redeemable convertible preferred stock	$0	C	6666667	Disposed		Common stocks (1814059)	Indirect
2015-11-03	Series B redeemable convertible preferred stock	$0	C	1855288	Disposed		Common stocks (504840)	Indirect

Footnotes

F1: Conversion upon Initial Public Offering