| GENEVA CAPITAL MANAGEMENT LLC | 1,144,233 | $113,370,567 | 2.39% |
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| Van Berkom & Associates Inc. | 692,538 | $68,617 | 2.23% |
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| Conestoga Capital Advisors, LLC | 1,130,504 | $112,010,336 | 1.92% |
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| WASATCH ADVISORS LP | 3,065,079 | $303,688,027 | 1.92% |
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| NEUMEIER POMA INVESTMENT COUNSEL LLC | 157,260 | $15,581,321 | 1.52% |
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| NBW CAPITAL LLC | 56,348 | $5,582,960 | 1.37% |
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| Bell Asset Management Ltd | 76,411 | $7,570,802 | 1.25% |
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| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | 3,676,115 | $364,229,474 | 1.04% |
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| Advantage Alpha Capital Partners LP | 48,063 | $4,762,082 | 1.00% |
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| Montanaro Asset Management Ltd | 50,000 | $4,954,000 | 0.87% |
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| Precision Wealth Strategies, LLC | 8,030 | $795,612 | 0.86% |
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| Pier Capital, LLC | 42,075 | $4,168,791 | 0.67% |
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| CHATHAM CAPITAL GROUP, INC. | 29,251 | $2,898,189 | 0.65% |
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| MOODY ALDRICH PARTNERS LLC | 33,871 | $3,355,939 | 0.64% |
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| SHAKER INVESTMENTS LLC/OH | 10,575 | $1,047,771 | 0.58% |
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| VELA Investment Management, LLC | 11,689 | $1,158,146 | 0.51% |
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| Redwood Investments, LLC | 37,225 | $3,688,253 | 0.50% |
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| Mitsubishi UFJ Asset Management (UK) Ltd. | 6,700 | $664 | 0.47% |
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| ArrowMark Colorado Holdings LLC | 343,766 | $34,060,335 | 0.41% |
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| GW&K Investment Management, LLC | 415,158 | $41,133 | 0.41% |
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