| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | BLAIR (WILLIAM) & COMPANY, L.L.C. | 1,412,952 | 8.09 | $34,758,619 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,273,177 | 7.29 | $31,320,154 | 30-Sep-09 | | MAIRS & POWER INC | 1,068,607 | 6.11 | $26,287,732 | 30-Sep-09 | | TRIGRAN INVESTMENTS INC | 643,534 | 3.68 | $15,830,936 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 639,803 | 3.66 | $15,739,153 | 30-Sep-09 | | OPPENHEIMER FUNDS, INC. | 517,870 | 2.96 | $12,739,602 | 30-Sep-09 | | Champlain Investment Partners, LLC | 415,530 | 2.38 | $10,222,038 | 30-Sep-09 | | DIMENSIONAL FUND ADVISORS LP | 412,422 | 2.36 | $10,145,581 | 30-Sep-09 | | STATE STREET CORPORATION | 402,792 | 2.30 | $9,908,683 | 30-Sep-09 | | SEGALL BRYANT & HAMILL INVESTMENT COUNSEL | 352,633 | 2.02 | $8,674,771 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | MAIRS & POWER GROWTH FUND INC | 770,000 | 4.41 | $18,942,000 | 30-Sep-09 | | BLAIR (WILLIAM) MUTUAL FUNDS, INC.-SMALL CAP GROWTH FUND | 390,648 | 2.24 | $9,609,940 | 30-Sep-09 | | NEUBERGER & BERMAN GENESIS FUND | 2,032,430 | 11.63 | $49,997,778 | 30-Sep-09 | | ISHARES S&P SMALLCAP 600 INDEX FD | 227,276 | 1.30 | $5,820,538 | 31-Oct-09 | | ISHARES RUSSELL 2000 INDEX FD | 226,294 | 1.29 | $5,566,832 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 180,436 | 1.03 | $4,083,266 | 30-Jun-09 | | DFA U.S. MICRO CAP SERIES | 178,765 | 1.02 | $3,879,200 | 30-Apr-09 | | Primecap Odyssey Growth Fund | 136,200 | .78 | $3,350,520 | 30-Sep-09 | | IShares S&P Small Cap 600 Growth Index Fund | 133,442 | .76 | $3,417,449 | 31-Oct-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 130,369 | .75 | $2,950,250 | 30-Jun-09 |
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Value shown is computed using the security's price on the report date given.
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