| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | FMR LLC | 3,245,579 | 9.48 | $129,076,676 | 30-Sep-09 | | EARNEST PARTNERS LLC | 2,489,079 | 7.27 | $98,990,671 | 30-Sep-09 | | MAIRS & POWER INC | 2,442,971 | 7.14 | $97,156,956 | 30-Sep-09 | | GOLDMAN SACHS GROUP INC | 2,066,240 | 6.04 | $82,174,364 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 1,914,032 | 5.59 | $76,121,052 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 1,658,615 | 4.85 | $65,963,118 | 30-Sep-09 | | Pictet Asset Management Ltd | 1,407,400 | 4.11 | $55,972,298 | 30-Sep-09 | | COLUMBIA WANGER ASSET MANAGEMENT, L.P. | 1,164,300 | 3.40 | $46,304,211 | 30-Sep-09 | | FISHER INVESTMENTS, INC. | 1,000,786 | 2.92 | $39,801,259 | 30-Sep-09 | | STATE STREET CORPORATION | 672,079 | 1.96 | $26,728,581 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | MAIRS & POWER GROWTH FUND INC | 1,880,000 | 5.49 | $74,767,600 | 30-Sep-09 | | COLUMBIA ACORN FD | 1,350,000 | 3.94 | $40,365,000 | 30-Jun-09 | | NEUBERGER & BERMAN GENESIS FUND | 1,296,994 | 3.79 | $51,581,451 | 30-Sep-09 | | FIDELITY BLUE CHIP GROWTH FUND | 737,400 | 2.15 | $29,326,398 | 30-Sep-09 | | Fidelity Growth Strategies Fund | 503,500 | 1.47 | $20,024,195 | 30-Sep-09 | | FIDELITY MID-CAP STOCK FUND | 500,000 | 1.46 | $19,885,000 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 443,863 | 1.30 | $13,271,503 | 30-Jun-09 | | ISHARES S&P SMALLCAP 600 INDEX FD | 443,859 | 1.30 | $16,431,660 | 31-Oct-09 | | FIDELITY FUND | 421,400 | 1.23 | $16,759,078 | 30-Sep-09 | | VARIABLE INSURANCE PRODUCTS FD II-CONTRAFUND PORTFOLIO | 406,467 | 1.19 | $16,165,192 | 30-Sep-09 |
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Value shown is computed using the security's price on the report date given.
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