| 1 | Montanaro Asset Management Ltd | 46,200 | $13.6B | 3.78% | Share |
| 2 | BlackRock, Inc. | 1,741,761 | $511.0M | 0.01% | Share |
| 3 | VANGUARD GROUP INC | 1,619,407 | $475.3M | 0.01% | Share |
| 4 | Anchor Investment Management, LLC | 1,135 | $333.2M | 0.03% | Share |
| 5 | Capital World Investors | 1,052,480 | $308.0M | 0.04% | Share |
| 6 | WASATCH ADVISORS LP | 666,473 | $195.6M | 1.16% | Share |
| 7 | STATE STREET CORP | 637,650 | $187.0M | 0.01% | Share |
| 8 | Conestoga Capital Advisors, LLC | 633,255 | $185.9M | 3.13% | Share |
| 9 | BlackRock, Inc. | 464,951 | $136.0M | 0.00% | Share |
| 10 | Neuberger Berman Group LLC | 390,260 | $114.0M | 0.08% | Share |
| 11 | FIRST TRUST ADVISORS LP | 382,174 | $112.0M | 0.08% | Share |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 339,566 | $99.0M | 0.01% | Share |
| 13 | KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | 310,014 | $91.0M | 0.24% | Share |
| 14 | MORGAN STANLEY | 293,145 | $86.0M | 0.01% | Share |
| 15 | NORGES BANK | 294,434 | $86.0M | 0.01% | Share |
| 16 | DIMENSIONAL FUND ADVISORS LP | 286,080 | $83.0M | 0.02% | Share |
| 17 | FIRST MANHATTAN CO. LLC. | 273,420 | $80.0M | 0.21% | Share |
| 18 | Capital International Investors | 226,298 | $66.0M | 0.01% | Share |
| 19 | CONGRESS ASSET MANAGEMENT CO | 221,450 | $65.0M | 0.46% | Share |
| 20 | Champlain Investment Partners, LLC | 214,887 | $63.1M | 0.64% | Share |
| 21 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 174,829 | $51.0M | 0.01% | Share |
| 22 | GW&K Investment Management, LLC | 151,461 | $44.5M | 0.38% | Share |
| 23 | Channing Capital Management, LLC | 150,453 | $44.2M | 1.14% | Share |
| 24 | GOLDMAN SACHS GROUP INC | 150,277 | $44.0M | 0.01% | Share |
| 25 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | 810,449 | $42.0M | 0.03% | Share |
| 26 | Allspring Global Investments Holdings, LLC | 140,334 | $41.4M | 0.07% | Share |
| 27 | NORTHERN TRUST CORP | 139,545 | $40.0M | 0.01% | Share |
| 28 | SG Americas Securities, LLC | 135,984 | $39.9M | 0.05% | Share |
| 29 | UBS Group AG | 132,999 | $39.0M | 0.01% | Share |
| 30 | RIVERBRIDGE PARTNERS LLC | 130,412 | $38.3M | 0.72% | Share |
| 31 | PRICE T ROWE ASSOCIATES INC /MD/ | 131,606 | $38.0M | 0.00% | Share |
| 32 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 121,740 | $35.0M | 0.05% | Share |
| 33 | THRIVENT FINANCIAL FOR LUTHERANS | 122,569 | $35.0M | 0.06% | Share |
| 34 | VANGUARD GROUP INC | 114,122 | $33.5M | 0.00% | Share |
| 35 | Select Equity Group, L.P. | 108,194 | $31.8M | 0.14% | Share |
| 36 | FMR LLC | 107,860 | $31.0M | 0.00% | Share |
| 37 | BESSEMER GROUP INC | 98,217 | $28.0M | 0.04% | Share |
| 38 | MORGAN STANLEY | 92,374 | $27.0M | 0.00% | Share |
| 39 | DF DENT & CO INC | 92,332 | $27.0M | 0.39% | Share |
| 40 | Langdon Equity Partners | 82,282 | $26.4M | 13.60% | Share |
| 41 | MORGAN STANLEY | 91,132 | $26.0M | 0.00% | Share |
| 42 | LOOMIS SAYLES & CO L P | 91,334 | $26.0M | 0.03% | Share |
| 43 | COMERICA BANK | 82,106 | $24.1M | 0.10% | Share |
| 44 | KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | 82,096 | $24.1M | 0.06% | Share |
| 45 | Zuckerman Investment Group, LLC | 79,860 | $23.4M | 2.09% | Share |
| 46 | PRINCIPAL FINANCIAL GROUP INC | 78,813 | $23.1M | 0.01% | Share |
| 47 | AMERIPRISE FINANCIAL INC | 79,370 | $23.0M | 0.01% | Share |
| 48 | JANUS HENDERSON GROUP PLC | 78,502 | $23.0M | 0.01% | Share |
| 49 | VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. | 78,280 | $23.0M | 0.22% | Share |
| 50 | NATIXIS ADVISORS, LLC | 69,025 | $20.0M | 0.03% | Share |