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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1571498	Epizyme Inc.	EPZM	Pharmaceutical Preparations (2834)	261349956

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
318154	Amgen Inc	One Amgen Center Drive Thousand Oaks CA 91320-1799		No	No	Yes	No
1576997	Amgen Ventures Llc	One Amgen Center Drive Thousand Oaks CA 91320-1799		No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2013-06-05	317,460	$0.00	317,460	No	4	C	Direct
Common Stock	Acquisiton	2013-06-05	16,666	$15.00	334,126	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Direct
No	4	P	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series B Preferred Stock	Disposition	2013-06-05	952,381	$0.00	317,460	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Direct

Footnotes

Each share of Series B Preferred Stock automatically converted into 1/3rd of a share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. The shares had no expiration date.
These shares are owned directly by Amgen Ventures LLC, a wholly-owned subsidiary of Amgen Inc. (Amgen), and Amgen has the power to vote, acquire, hold and dispose of all shares. Amgen disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.
Upon the closing of the Issuer's initial public offering on June 5, 2013, the shares held by the reporting persons represent less than 10% beneficial ownership of the outstanding shares of common stock.