| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | BAMCO INC. | 7,073,385 | 9.96 | $391,299,658 | 30-Sep-09 | | FMR LLC | 3,314,296 | 4.67 | $183,346,854 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 3,146,094 | 4.43 | $174,041,920 | 30-Sep-09 | | BLAIR (WILLIAM) & COMPANY, L.L.C. | 2,900,373 | 4.08 | $160,448,634 | 30-Sep-09 | | Capital World Investors | 2,400,000 | 3.38 | $132,768,000 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 2,397,010 | 3.37 | $132,602,593 | 30-Sep-09 | | UBS GLOBAL ASSET MANAGEMENT (AMERICAS) INC | 2,173,262 | 3.06 | $120,224,853 | 30-Sep-09 | | STATE STREET CORPORATION | 1,949,624 | 2.74 | $107,853,199 | 30-Sep-09 | | WESTPORT ASSET MANAGEMENT INC. | 1,514,196 | 2.13 | $83,765,322 | 30-Sep-09 | | KALMAR INVESTMENTS INC. | 1,424,747 | 2.01 | $78,817,004 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | BARON GROWTH FUND | 3,650,000 | 5.14 | $182,646,000 | 30-Jun-09 | | FIDELITY ADVISOR MID CAP FUND | 1,936,675 | 2.73 | $107,136,861 | 30-Sep-09 | | BARON ASSET FUND | 1,450,000 | 2.04 | $72,558,000 | 30-Jun-09 | | WESTPORT SELECT CAP FUND | 1,275,000 | 1.80 | $70,533,000 | 30-Sep-09 | | SMALLCAP WORLD FUND | 900,000 | 1.27 | $45,036,000 | 30-Jun-09 | | BARON PARTNERS FUND | 850,000 | 1.20 | $47,022,000 | 30-Sep-09 | | VANGUARD EXPLORER FUND, INC. | 766,336 | 1.08 | $38,117,552 | 31-Jul-09 | | VANGUARD MID-CAP INDEX FUND | 679,426 | .96 | $33,998,477 | 30-Jun-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 598,556 | .84 | $29,951,742 | 30-Jun-09 | | BRANDYWINE FUND, INC. | 593,700 | .84 | $32,843,484 | 30-Sep-09 |
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*
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Value shown is computed using the security's price on the report date given.
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