| BlackRock, Inc. | 3,896,222 | $317.6m | 0.0% |
| DISCIPLINED GROWTH INVESTORS INC /MN | 2,380,514 | $194.0m | 3.3% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1,599,765 | $130.4m | 0.0% |
| DIMENSIONAL FUND ADVISORS LP | 1,152,305 | $93.9m | 0.0% |
| STATE STREET CORP | 1,138,462 | $92.8m | 0.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1,054,623 | $86.0m | 0.0% |
| AMERICAN CAPITAL MANAGEMENT INC | 619,845 | $50.5m | 2.3% |
| GEODE CAPITAL MANAGEMENT, LLC | 614,028 | $50.1m | 0.0% |
| RENAISSANCE TECHNOLOGIES LLC | 469,251 | $38.2m | 0.1% |
| PRUDENTIAL FINANCIAL INC | 457,810 | $37.3m | 0.0% |
| FMR LLC | 442,659 | $36.1m | 0.0% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 440,816 | $35.9m | 0.0% |
| Nuveen, LLC | 420,059 | $34.2m | 0.0% |
| GOLDMAN SACHS GROUP INC | 403,179 | $32.9m | 0.0% |
| Driehaus Capital Management LLC | 370,151 | $30.2m | 0.2% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 354,188 | $28.9m | 0.0% |
| MORGAN STANLEY | 314,778 | $25.7m | 0.0% |
| S SQUARED TECHNOLOGY, LLC | 288,120 | $23.5m | 7.3% |
| NORTHERN TRUST CORP | 284,562 | $23.2m | 0.0% |
| FIRST TRUST ADVISORS LP | 224,792 | $18.3m | 0.0% |
| JPMORGAN CHASE & CO | 224,717 | $17.9m | 0.0% |
| D. E. Shaw & Co., Inc. | 211,366 | $17.2m | 0.0% |
| NORDEA INVESTMENT MANAGEMENT AB | 203,883 | $16.5m | 0.0% |
| Hillsdale Investment Management Inc. | 191,594 | $15.6m | 0.4% |
| JUPITER ASSET MANAGEMENT LTD | 188,539 | $15.4m | 0.1% |