| SANTA MONICA PARTNERS LP | 203,004 | $25,181 | 19.44% |
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| Montanaro Asset Management Ltd | 188,000 | $23,319,520 | 4.10% |
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| Conestoga Capital Advisors, LLC | 1,076,327 | $133,507,648 | 2.29% |
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| GENEVA CAPITAL MANAGEMENT LLC | 763,326 | $94,682,937 | 2.00% |
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| Tributary Capital Management, LLC | 139,116 | $17,255,949 | 1.63% |
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| WASATCH ADVISORS LP | 1,976,930 | $245,218,397 | 1.55% |
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| Cutter & CO Brokerage, Inc. | 41,853 | $5,191,409 | 1.52% |
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| Laurus Investment Counsel Inc. | 19,990 | $3,342,174 | 1.40% |
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| IQ EQ FUND MANAGEMENT (IRELAND) Ltd | 37,950 | $4,707,318 | 0.97% |
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| MOODY ALDRICH PARTNERS LLC | 36,613 | $4,541,477 | 0.86% |
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| ICW Investment Advisors LLC | 12,161 | $1,508,434 | 0.81% |
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| Kensington Investment Counsel, LLC | 10,054 | $1,247,098 | 0.77% |
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| APG Asset Management N.V. | 2,684,002 | $332,923,608 | 0.68% |
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| Stephens Investment Management Group LLC | 333,659 | $41,387,062 | 0.68% |
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| MARTIN & CO INC /TN/ | 19,246 | $2,387,305 | 0.63% |
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| Bath Savings Trust Co | 38,449 | $4,769,214 | 0.59% |
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| Cardinal Capital Management | 19,460 | $2,413,819 | 0.49% |
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| SEGALL BRYANT & HAMILL, LLC | 292,416 | $36,271,281 | 0.42% |
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| GW&K Investment Management, LLC | 324,914 | $40,302 | 0.40% |
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| SALEM INVESTMENT COUNSELORS INC | 84,845 | $10,524,174 | 0.40% |
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