| P2 Capital Partners, LLC | 611,326 | $47,047,649 | 5.16% |
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| Premier Fund Managers Ltd | 741,732 | $56,672 | 2.27% |
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| MAIRS & POWER INC | 2,179,374 | $167,724,625 | 1.62% |
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| S&CO INC | 266,272 | $20,492 | 1.43% |
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| SilverOak Wealth Management LLC | 70,836 | $5,451,539 | 1.31% |
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| DAVIDSON INVESTMENT ADVISORS | 194,828 | $14,993,963 | 0.77% |
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| SILVERCREST ASSET MANAGEMENT GROUP LLC | 1,298,911 | $99,964,193 | 0.69% |
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| BFSG, LLC | 49,408 | $3,802,402 | 0.48% |
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| CHATHAM CAPITAL GROUP, INC. | 33,226 | $2,557,073 | 0.45% |
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| CRAMER ROSENTHAL MCGLYNN LLC | 86,185 | $6,632,798 | 0.39% |
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| CHESAPEAKE CAPITAL CORP /IL/ | 3,800 | $292,448 | 0.38% |
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| Dorsey & Whitney Trust CO LLC | 71,354 | $5,491,403 | 0.38% |
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| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | 1,944,641 | $149,659,595 | 0.36% |
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| GAMCO INVESTORS, INC. ET AL | 401,521 | $30,901,056 | 0.34% |
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| CARDINAL CAPITAL MANAGEMENT LLC /CT | 14,103 | $1,085,367 | 0.30% |
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| Hillsdale Investment Management Inc. | 47,280 | $3,638,669 | 0.29% |
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| GHP Investment Advisors, Inc. | 52,920 | $4,072,686 | 0.20% |
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| INCEPTIONR LLC | 9,078 | $698,643 | 0.20% |
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| GABELLI FUNDS LLC | 318,200 | $24,488,672 | 0.19% |
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| CRAWFORD INVESTMENT COUNSEL INC | 113,642 | $8,745,924 | 0.17% |
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