X0306 4 2014-03-01 0 0001131096 ATHENAHEALTH INC ATHN 0001204310 KAHANE STEPHEN N 311 ARSENAL STREET WATERTOWN MA 02472 0 1 0 0 President, Enterprise Services Common Stock 2014-03-01 4 F 0 182 193.87 D 90695 D Common Stock 2014-03-01 4 F 0 8898 193.87 D 81797 D Common Stock 2014-03-01 4 F 0 7756 193.87 D 74041 D Common Stock 2014-03-01 4 F 0 1473 193.87 D 72568 D Common Stock 2014-03-01 4 F 0 915 193.87 D 71653 D These shares were withheld to satisfy tax withholding obligations incurred upon the vesting of restricted stock units awarded to the Reporting Person on March 1, 2011. This transaction is considered an exempt sale pursuant to Rule 16b-3(e) promulgated under the Securities Exchange Act of 1934. These shares were withheld to satisfy tax withholding obligations incurred upon the vesting of restricted stock units awarded to the Reporting Person on March 1, 2012. This transaction is considered an exempt sale pursuant to Rule 16b-3(e) promulgated under the Securities Exchange Act of 1934. These shares were withheld to satisfy tax withholding obligations incurred upon the vesting of restricted stock units awarded to the Reporting Person on March 1, 2013. This transaction is considered an exempt sale pursuant to Rule 16b-3(e) promulgated under the Securities Exchange Act of 1934. /s/ Daniel H. Orenstein Attorney-in-Fact 2014-03-04