| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | WADDELL & REED FINANCIAL INC. | 1,918,850 | 9.47 | $32,927,466 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,541,415 | 7.61 | $26,450,681 | 30-Sep-09 | | BARES CAPITAL MANAGEMENT INC | 1,426,884 | 7.05 | $24,485,329 | 30-Sep-09 | | MAIRS & POWER INC | 1,125,305 | 5.56 | $19,310,233 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 889,832 | 4.39 | $15,269,517 | 30-Sep-09 | | RIVERBRIDGE PARTNERS LLC | 885,459 | 4.37 | $15,194,476 | 30-Sep-09 | | COLUMBIA WANGER ASSET MANAGEMENT, L.P. | 833,000 | 4.11 | $14,294,280 | 30-Sep-09 | | LORD ABBETT & CO | 798,446 | 3.94 | $13,701,333 | 30-Sep-09 | | MACKENZIE FINANCIAL CORPORATION | 755,263 | 3.73 | $12,960,313 | 30-Sep-09 | | EATON VANCE MANAGEMENT | 716,410 | 3.54 | $12,293,595 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | WADDELL & REED ADVISORS FDS-SMALL CAP FUND | 1,119,938 | 5.53 | $12,218,523 | 30-Jun-09 | | COLUMBIA ACORN FD | 944,100 | 4.66 | $10,300,131 | 30-Jun-09 | | MAIRS & POWER GROWTH FUND INC | 750,000 | 3.70 | $12,870,000 | 30-Sep-09 | | IVY SMALL CAP GROWTH FUND | 612,275 | 3.02 | $6,679,920 | 30-Jun-09 | | LORD ABBETT SMALL CAP BLEND FUND | 463,453 | 2.29 | $7,313,288 | 31-Jul-09 | | VANGUARD EXPLORER FUND, INC. | 398,700 | 1.97 | $6,291,486 | 31-Jul-09 | | FIDELITY SELECT PORTFOLIOS - TECHNOLOGY | 308,100 | 1.52 | $5,286,996 | 30-Sep-09 | | ISHARES RUSSELL 2000 INDEX FD | 297,063 | 1.47 | $5,097,601 | 30-Sep-09 | | Primecap Odyssey Aggressive Growth Fund | 262,400 | 1.30 | $4,502,784 | 30-Sep-09 | | ISHARES S&P SMALLCAP 600 INDEX FD | 262,314 | 1.30 | $4,139,314 | 31-Oct-09 |
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Value shown is computed using the security's price on the report date given.
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1.48% Nasdaq 
Major Holders
