X0306 4 2013-03-12 1 0001096738 EPOCRATES INC EPOC 0001233415 GREENFIELD GARY G 1100 PARK PLACE SUITE 300 SAN MATEO CA 94403 1 0 0 0 Non-Qualified Stock Option (right to buy) 16 2013-03-12 4 D 0 19650 D Common Stock 19650 0 D Non-Qualified Stock Option (right to buy) 8.14 2013-03-12 4 D 0 11790 D Common Stock 11790 0 D The stock options under this award were fully vested prior to the closing of the Merger (as defined below). Pursuant to the Agreement and Plan of Merger among Epocrates, Inc. (the "Issuer"), athenahealth, Inc., and Echo Merger Sub, Inc., a wholly-owned subsidiary of athenahealth, Inc., dated January 7, 2013 (the "Merger Agreement"), each share of the Issuer's common stock was exchanged for $11.75 in cash, without interest and less any applicable withholding taxes (the "Merger"). In connection with the Merger, the vested and/or exercisable portion of each Issuer stock option held by the Reporting Person was converted into the right to receive an amount in cash equal to the product of the number of shares issuable upon the exercise of such option and $11.75 minus the exercise price of such option. The Reporting Person's options, if any, with an exercise price equal to or above $11.75 were canceled in connection with the Merger. 5,895 of the stock options under this award were vested prior to the closing of the Merger. 5,895 of the stock options under this award accelerated and became fully vested as of the closing of the Merger. /s/ Matthew B. Hemington, Attorney-in-Fact for Gary G. Greenfield 2013-03-13