| Montanaro Asset Management Ltd | 162,000 | $31,064 | 3.83% |
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| MOUNTAIN PACIFIC INVESTMENT ADVISERS INC/ID | 287,437 | $55,110 | 3.60% |
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| FENIMORE ASSET MANAGEMENT INC | 754,283 | $144,619 | 3.54% |
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| HARVEY INVESTMENT CO LLC | 89,447 | $17,150 | 2.10% |
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| SNYDER CAPITAL MANAGEMENT L P | 420,178 | $80,561 | 2.05% |
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| SPEECE THORSON CAPITAL GROUP INC | 33,951 | $6,509 | 1.39% |
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| Champlain Investment Partners, LLC | 1,122,850 | $215,284 | 1.12% |
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| DB Fitzpatrick & Co, Inc | 5,448 | $1,045 | 1.04% |
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| Echo Street Capital Management LLC | 702,207 | $134,634 | 0.97% |
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| CONGRESS ASSET MANAGEMENT CO /MA | 587,347 | $112,612 | 0.96% |
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| Robeco Schweiz AG | 266,010 | $51,002 | 0.72% |
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| BROWN ADVISORY INC | 2,559,666 | $503,292 | 0.68% |
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| KENFARB & CO. | 4,295 | $823 | 0.65% |
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| WESTFIELD CAPITAL MANAGEMENT CO LP | 526,620 | $100,969 | 0.65% |
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| GENEVA CAPITAL MANAGEMENT LLC | 158,398 | $30,370 | 0.59% |
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| KING LUTHER CAPITAL MANAGEMENT CORP | 568,750 | $109,046 | 0.53% |
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| MERITAGE PORTFOLIO MANAGEMENT | 40,581 | $7,781 | 0.48% |
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| HAHN CAPITAL MANAGEMENT LLC | 11,220 | $2,151,211 | 0.46% |
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| BARD ASSOCIATES INC | 6,850 | $1,313 | 0.46% |
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| DUPONT CAPITAL MANAGEMENT CORP | 59,012 | $11,314 | 0.46% |
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