| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | BAMCO INC. | 7,145,910 | 5.05 | $132,485,171 | 30-Sep-09 | | MUNDER CAPITAL MANAGEMENT, INC. | 6,439,271 | 4.55 | $119,384,084 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 5,670,987 | 4.01 | $105,140,098 | 30-Sep-09 | | ARTISAN PARTNERS LIMITED PARTNERSHIP | 4,966,800 | 3.51 | $92,084,472 | 30-Sep-09 | | WADDELL & REED FINANCIAL INC. | 4,593,841 | 3.25 | $85,169,812 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 4,280,130 | 3.03 | $79,353,610 | 30-Sep-09 | | Calamos Advisors LLC | 3,359,711 | 2.38 | $62,289,041 | 30-Sep-09 | | STATE STREET CORPORATION | 2,751,801 | 1.95 | $51,018,390 | 30-Sep-09 | | KALMAR INVESTMENTS INC. | 2,739,932 | 1.94 | $50,798,339 | 30-Sep-09 | | PRICE (T.ROWE) ASSOCIATES INC | 2,692,107 | 1.90 | $49,911,663 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | BARON GROWTH FUND | 5,450,010 | 3.85 | $89,652,664 | 30-Jun-09 | | Munder Mid-Cap Core Growth Fund | 4,130,700 | 2.92 | $67,950,015 | 30-Jun-09 | | CALAMOS GROWTH FUND | 2,150,000 | 1.52 | $39,861,000 | 30-Sep-09 | | ARTISAN MID-CAP FUND | 1,785,901 | 1.26 | $29,378,071 | 30-Jun-09 | | PRICE (T.ROWE) NEW HORIZONS FUND | 1,700,800 | 1.20 | $31,532,832 | 30-Sep-09 | | VANGUARD MID-CAP INDEX FUND | 1,326,144 | .94 | $21,815,068 | 30-Jun-09 | | SENTINEL SMALL COMPANY FUND | 1,310,000 | .93 | $24,287,400 | 30-Sep-09 | | VANGUARD MORGAN GROWTH FUND | 1,199,555 | .85 | $19,732,679 | 30-Jun-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 1,166,811 | .83 | $19,194,040 | 30-Jun-09 | | VANGUARD EXPLORER FUND, INC. | 1,120,110 | .79 | $20,094,773 | 31-Jul-09 |
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Value shown is computed using the security's price on the report date given.
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