| P2 Capital Partners, LLC | 286,211 | $46,781,188 | 6.12% |
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| Sandhill Capital Partners LLC | 256,684 | $41,954,940 | 3.92% |
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| Jackson Square Partners, LLC | 644,708 | $105,377,523 | 3.52% |
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| Pembroke Management, LTD | 143,876 | $23,516,532 | 3.21% |
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| Conestoga Capital Advisors, LLC | 1,097,874 | $179,447,505 | 3.08% |
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| McCollum Christoferson Group LLC | 60,783 | $9,934,981 | 3.05% |
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| Aperture Investors, LLC | 91,602 | $14,972,347 | 2.38% |
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| Premier Fund Managers Ltd | 306,678 | $50,330 | 2.37% |
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| Ranger Investment Management | 188,940 | $30,882,243 | 2.05% |
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| CONTRAVISORY INVESTMENT MANAGEMENT, INC. | 40,954 | $6,693,931 | 1.90% |
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| Summit Creek Advisors LLC | 82,648 | $13,508,816 | 1.84% |
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| GENEVA CAPITAL MANAGEMENT LLC | 511,899 | $83,669,948 | 1.76% |
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| Bridge City Capital, LLC | 19,897 | $3,252,165 | 1.64% |
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| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | 3,384,825 | $553,249,646 | 1.58% |
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| DF DENT & CO INC | 629,009 | $102,811,495 | 1.51% |
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| Lisanti Capital Growth, LLC | 51,630 | $8,438,924 | 1.33% |
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| Stephens Investment Management Group LLC | 458,735 | $74,980,236 | 1.23% |
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| Cynosure Group, LLC | 24,222 | $3,959,086 | 1.22% |
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| Advantage Alpha Capital Partners LP | 34,602 | $5,655,697 | 1.19% |
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| Pier Capital, LLC | 33,851 | $5,532,946 | 0.89% |
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