| BlackRock, Inc. | 8,092,226 | $360.0m | 0.0% |
| STATE STREET CORP | 3,293,975 | $146.6m | 0.0% |
| CONGRESS ASSET MANAGEMENT CO | 2,916,295 | $129.7m | 0.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2,255,728 | $100.4m | 0.0% |
| Conestoga Capital Advisors, LLC | 2,083,832 | $92.7m | 2.0% |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 1,992,855 | $88.7m | 0.3% |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1,639,988 | $73.0m | 0.1% |
| GW&K Investment Management, LLC | 1,550,497 | $69.0m | 0.5% |
| Soleus Capital Management, L.P. | 1,459,152 | $64.9m | 2.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 1,341,244 | $59.7m | 0.0% |
| GENEVA CAPITAL MANAGEMENT LLC | 1,339,123 | $59.6m | 1.4% |
| LOOMIS SAYLES & CO L P | 1,200,239 | $53.4m | 0.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1,060,753 | $47.2m | 0.0% |
| BANK OF AMERICA CORP /DE/ | 1,016,184 | $45.2m | 0.0% |
| DIMENSIONAL FUND ADVISORS LP | 906,200 | $40.3m | 0.0% |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | 896,651 | $39.9m | 0.3% |
| ROYAL BANK OF CANADA | 775,762 | $34.5m | 0.0% |
| Champlain Investment Partners, LLC | 755,828 | $33.6m | 0.9% |
| Aberdeen Group plc | 710,238 | $31.6m | 0.0% |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 664,305 | $29.6m | 0.0% |
| NEXT CENTURY GROWTH INVESTORS LLC | 612,584 | $27.3m | 1.4% |
| NORTHERN TRUST CORP | 597,641 | $26.6m | 0.0% |
| TWO SIGMA INVESTMENTS, LP | 580,982 | $25.8m | 0.0% |
| SG Capital Management LLC | 571,252 | $25.4m | 2.1% |
| TimesSquare Capital Management, LLC | 549,846 | $24.5m | 0.4% |