| BlackRock, Inc. | 4,095,371 | $170.0m | 0.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2,034,219 | $84.4m | 0.0% |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | 1,704,006 | $70.7m | 0.2% |
| UBS Group AG | 1,429,090 | $59.3m | 0.0% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1,418,863 | $58.9m | 0.0% |
| STATE STREET CORP | 1,358,225 | $56.4m | 0.0% |
| GOLDMAN SACHS GROUP INC | 1,294,047 | $53.7m | 0.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 1,243,198 | $51.6m | 0.0% |
| FIRST TRUST ADVISORS LP | 1,168,424 | $48.5m | 0.0% |
| OBERWEIS ASSET MANAGEMENT INC/ | 987,500 | $41.0m | 0.8% |
| AWM Investment Company, Inc. | 951,604 | $39.5m | 3.4% |
| BAILLIE GIFFORD & CO | 933,308 | $38.7m | 0.0% |
| EMERALD ADVISERS, LLC | 843,956 | $35.0m | 0.8% |
| Legal & General Group Plc | 756,863 | $31.4m | 0.0% |
| DIMENSIONAL FUND ADVISORS LP | 645,991 | $26.8m | 0.0% |
| MORGAN STANLEY | 635,833 | $26.4m | 0.0% |
| Nuveen, LLC | 628,406 | $26.1m | 0.0% |
| Telemark Asset Management, LLC | 600,000 | $24.9m | 1.8% |
| ROYCE & ASSOCIATES LP | 555,821 | $23.1m | 0.2% |
| EMERALD MUTUAL FUND ADVISERS TRUST | 538,955 | $22.4m | 0.8% |
| NORTHERN TRUST CORP | 433,792 | $18.0m | 0.0% |
| Ranger Investment Management, L.P. | 405,266 | $16.8m | 1.1% |
| Stephens Investment Management Group LLC | 402,762 | $16.7m | 0.2% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 399,125 | $16.6m | 0.0% |
| PANAGORA ASSET MANAGEMENT INC | 375,515 | $15.6m | 0.0% |