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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1096738	Epocrates Inc	EPOC	Services-Computer Processing & Data Preparation (7374)	943326769

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1190472	A Mark Wan	C/O Three Arch Partners 3200 Alpine Road Portola Valley CA 94028		Yes	No	No	Yes

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	2011-02-07	1,018,165	$0.00	1,018,165	No	4	C	Indirect	See Footnote
Common Stock	Acquisiton	2011-02-07	348,001	$0.00	1,366,166	No	4	C	Indirect	See Footnote
Common Stock	Acquisiton	2011-02-07	581,279	$0.00	1,947,445	No	4	C	Indirect	See Footnote
Common Stock	Disposition	2011-02-07	292,116	$16.00	1,655,329	No	4	S	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	See Footnote
No	4	C	Indirect	See Footnote
No	4	C	Indirect	See Footnote
No	4	S	Indirect	See Footnote

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series A Convertible Preferred Stock	Disposition	2011-02-07	1,295,376	$0.00	1,018,165	$0.00
Common Stock	Series B Convertible Preferred Stock	Disposition	2011-02-07	383,205	$0.00	348,001	$0.00
Common Stock	Series C Convertible Preferred Stock	Disposition	2011-02-07	739,541	$0.00	581,279	$0.00

Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect

Footnotes

The shares are held by Three Arch Partners II, L.P. ("Three Arch"). Three Arch Management II, L.L.C. ("TAM II") is the general partner of Three Arch and thereby has sole voting and investment control over the shares owned by the Three Arch. Reporting Person and Wilfred E. Jaeger are managing members of TAM II and have shared voting and investment control over the shares owned by Three Arch. Reporting Person disclaims beneficial ownership of the shares held by Three Arch except to the extent of his pecuniary interest therein.
Each of the shares of the Issuer's Series A Convertible Preferred Stock and Series C Convertible Preferred Stock automatically converted into 0.786 shares of the Issuer's Common Stock immediately prior to the closing of the Issuer's initial public offering and have no expiration date.
Each of the shares of the Issuer's Series B Convertible Preferred Stock automatically converted into 0.90813437 shares of the Issuer's Common Stock immediately prior to the closing of the Issuer's initial public offering and has no expiration date.