| SC 13G/A | 2016-02-01 | RIVERBRIDGE PARTNERS LLC | ADVISORY BOARD CO | 2,283,780 | 5.4% | EDGAR |
| SC 13G/A | 2016-01-25 | BlackRock Inc. | ADVISORY BOARD CO | 2,284,393 | 5.5% | EDGAR |
| SC 13G/A | 2015-02-12 | MORGAN STANLEY | ADVISORY BOARD CO | 1,491,040 | 4.1% | EDGAR |
| SC 13G/A | 2015-02-11 | TimesSquare Capital Management, LLC | ADVISORY BOARD CO | 2,392,168 | 6.6% | EDGAR |
| SC 13G/A | 2015-02-10 | PRICE T ROWE ASSOCIATES INC /MD/ | ADVISORY BOARD CO | 4,315,786 | 11.9% | EDGAR |
| SC 13G/A | 2015-02-10 | VANGUARD GROUP INC | ADVISORY BOARD CO | 2,200,419 | 6.1% | EDGAR |
| SC 13G/A | 2015-02-06 | CHS Capital LLC | ADVISORY BOARD CO | 673,364 | 1.6% | EDGAR |
| SC 13G/A | 2015-02-02 | BlackRock Inc. | ADVISORY BOARD CO | 1,991,149 | 5.5% | EDGAR |
| SC 13G | 2015-01-29 | RIVERBRIDGE PARTNERS LLC | ADVISORY BOARD CO | 2,461,368 | 6.8% | EDGAR |
| SC 13G | 2015-01-20 | CHS Capital LLC | ADVISORY BOARD CO | 2,428,364 | 6.3% | EDGAR |
| SC 13G/A | 2014-02-11 | PRICE T ROWE ASSOCIATES INC /MD/ | ADVISORY BOARD CO | 4,679,584 | 12.9% | EDGAR |
| SC 13G/A | 2014-02-11 | MORGAN STANLEY | ADVISORY BOARD CO | 2,658,837 | 7.4% | EDGAR |
| SC 13G/A | 2014-02-10 | VANGUARD GROUP INC | ADVISORY BOARD CO | 2,113,886 | 5.9% | EDGAR |
| SC 13G/A | 2014-02-10 | TimesSquare Capital Management, LLC | ADVISORY BOARD CO | 2,115,653 | 5.9% | EDGAR |
| SC 13G/A | 2014-01-28 | BlackRock Inc. | ADVISORY BOARD CO | 2,000,831 | 5.6% | EDGAR |
| SC 13G/A | 2013-06-10 | ALLIANCEBERNSTEIN L.P. | ADVISORY BOARD CO | 77,908 | 0.2% | EDGAR |
| SC 13G/A | 2013-05-10 | FMR LLC | ADVISORY BOARD CO | 0 | 0.0% | EDGAR |
| SC 13G/A | 2013-02-22 | VANGUARD GROUP INC | ADVISORY BOARD CO | 1,897,583 | 5.4% | EDGAR |
| SC 13G/A | 2013-02-14 | FMR LLC | ADVISORY BOARD CO | 2,025,065 | 5.8% | EDGAR |
| SC 13G/A | 2013-02-13 | MORGAN STANLEY | ADVISORY BOARD CO | 2,177,448 | 6.3% | EDGAR |