| FMR LLC | 4,524,438 | $410.5m | 0.0% |
| BlackRock, Inc. | 4,323,986 | $392.4m | 0.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2,339,252 | $212.3m | 0.0% |
| DIMENSIONAL FUND ADVISORS LP | 2,185,315 | $198.3m | 0.0% |
| T. Rowe Price Investment Management, Inc. | 2,153,953 | $195.4m | 0.1% |
| AMERICAN CENTURY COMPANIES INC | 2,088,421 | $189.5m | 0.1% |
| Driehaus Capital Management LLC | 1,560,486 | $141.6m | 0.8% |
| GEODE CAPITAL MANAGEMENT, LLC | 1,460,389 | $132.5m | 0.0% |
| Divisadero Street Capital Management, LP | 1,329,817 | $120.7m | 2.7% |
| STATE STREET CORP | 1,264,690 | $114.8m | 0.0% |
| Capital World Investors | 1,157,200 | $105.0m | 0.0% |
| TWO SIGMA INVESTMENTS, LP | 1,013,412 | $92.0m | 0.1% |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 957,500 | $86.9m | 2.6% |
| Jupiter Topco LLC | 949,904 | $86.2m | 0.0% |
| ROYCE & ASSOCIATES LP | 842,317 | $76.4m | 0.6% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 835,692 | $75.8m | 0.0% |
| EMERALD ADVISERS, LLC | 736,784 | $66.9m | 1.6% |
| KING LUTHER CAPITAL MANAGEMENT CORP | 716,925 | $65.1m | 0.3% |
| Invesco Ltd. | 667,929 | $60.6m | 0.0% |
| LORD, ABBETT & CO. LLC | 642,111 | $58.3m | 0.2% |
| IES Holdings, Inc. | 623,527 | $56.6m | 18.2% |
| Thrivent Financial for Lutherans | 607,981 | $55.2m | 0.1% |
| GW&K Investment Management, LLC | 601,544 | $54.6m | 0.4% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 568,484 | $51.6m | 0.0% |
| First Eagle Investment Management, LLC | 548,644 | $49.8m | 0.0% |