| SC 13G/A | 2016-11-10 | MORGAN STANLEY | ATHENAHEALTH INC | 4,102,913 | 10.3% | EDGAR |
| SC 13G/A | 2016-07-08 | JANUS CAPITAL MANAGEMENT LLC | ATHENAHEALTH INC | 4,104,485 | 10.5% | EDGAR |
| SC 13G/A | 2016-06-10 | WELLINGTON MANAGEMENT GROUP LLP | ATHENAHEALTH INC | 4,420,938 | 11.3% | EDGAR |
| SC 13G/A | 2016-02-16 | GROWTH FUND OF AMERICA | ATHENAHEALTH INC | 2,529,861 | 6.5% | EDGAR |
| SC 13G/A | 2016-02-16 | JANUS CAPITAL MANAGEMENT LLC | ATHENAHEALTH INC | 3,331,131 | 8.6% | EDGAR |
| SC 13G/A | 2016-02-16 | SANDS CAPITAL MANAGEMENT, LLC | ATHENAHEALTH INC | 4,167,503 | 10.7% | EDGAR |
| SC 13G/A | 2016-02-16 | Capital Research Global Investors | ATHENAHEALTH INC | 3,008,523 | 7.7% | EDGAR |
| SC 13G/A | 2016-02-12 | FMR LLC | ATHENAHEALTH INC | 5,824,495 | 15.0% | EDGAR |
| SC 13G | 2016-02-12 | ATHENAHEALTH INC | CASTLIGHT HEALTH, INC. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2016-02-11 | PRICE T ROWE ASSOCIATES INC /MD/ | ATHENAHEALTH INC | 2,549,522 | 6.5% | EDGAR |
| SC 13G/A | 2016-02-11 | MORGAN STANLEY | ATHENAHEALTH INC | 3,812,261 | 9.8% | EDGAR |
| SC 13G/A | 2016-02-11 | WELLINGTON MANAGEMENT GROUP LLP | ATHENAHEALTH INC | 3,306,403 | 8.5% | EDGAR |
| SC 13G/A | 2016-02-10 | VANGUARD GROUP INC | ATHENAHEALTH INC | 2,609,701 | 6.7% | EDGAR |
| SC 13G/A | 2016-02-02 | Artisan Partners Limited Partnership | ATHENAHEALTH INC | 2,642,944 | 6.8% | EDGAR |
| SC 13G | 2015-09-10 | WELLINGTON MANAGEMENT GROUP LLP | ATHENAHEALTH INC | 3,975,540 | 10.3% | EDGAR |
| SC 13G/A | 2015-02-18 | JANUS CAPITAL MANAGEMENT LLC | ATHENAHEALTH INC | 3,084,910 | 8.1% | EDGAR |
| SC 13G/A | 2015-02-13 | PRICE T ROWE ASSOCIATES INC /MD/ | ATHENAHEALTH INC | 1,977,848 | 5.1% | EDGAR |
| SC 13G/A | 2015-02-13 | FMR LLC | ATHENAHEALTH INC | 5,714,132 | 15.0% | EDGAR |
| SC 13G/A | 2015-02-13 | Capital Research Global Investors | ATHENAHEALTH INC | 3,311,823 | 8.7% | EDGAR |
| SC 13G | 2015-02-13 | GROWTH FUND OF AMERICA | ATHENAHEALTH INC | 2,529,861 | 6.6% | EDGAR |