| BlackRock, Inc. | 2,466,624 | $686.5m | 0.0% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 888,596 | $247.3m | 0.0% |
| Capital World Investors | 746,545 | $207.8m | 0.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 736,304 | $204.9m | 0.0% |
| WASATCH ADVISORS LP | 693,036 | $192.9m | 1.3% |
| STATE STREET CORP | 674,775 | $187.6m | 0.0% |
| MORGAN STANLEY | 573,678 | $159.7m | 0.0% |
| Conestoga Capital Advisors, LLC | 471,727 | $131.3m | 2.9% |
| GEODE CAPITAL MANAGEMENT, LLC | 411,565 | $114.6m | 0.0% |
| NEUBERGER BERMAN GROUP LLC | 369,466 | $102.8m | 0.1% |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | 348,300 | $96.9m | 0.3% |
| DIMENSIONAL FUND ADVISORS LP | 317,165 | $88.3m | 0.0% |
| CONGRESS ASSET MANAGEMENT CO | 300,506 | $83.6m | 0.5% |
| Channing Capital Management, LLC | 299,374 | $83.3m | 1.9% |
| FIRST MANHATTAN CO. LLC. | 270,170 | $75.2m | 0.2% |
| FIRST TRUST ADVISORS LP | 266,240 | $74.1m | 0.0% |
| T. Rowe Price Investment Management, Inc. | 233,959 | $65.1m | 0.0% |
| NORTHERN TRUST CORP | 205,664 | $57.2m | 0.0% |
| GOLDMAN SACHS GROUP INC | 201,907 | $56.2m | 0.0% |
| CI INVESTMENTS INC. | 200,343 | $55.8m | 0.2% |
| GW&K Investment Management, LLC | 191,870 | $53.4m | 0.4% |
| Thrivent Financial for Lutherans | 181,277 | $50.5m | 0.1% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 180,593 | $50.3m | 0.0% |
| Select Equity Group, L.P. | 171,599 | $47.8m | 0.2% |
| Capital International Investors | 164,743 | $45.8m | 0.0% |