| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | HEALTHCOR MANAGEMENT LP | 3,425,000 | 9.74 | $106,380,500 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 2,516,279 | 7.16 | $78,155,625 | 30-Sep-09 | | TIMES SQUARE CAPITAL MANAGEMENT | 2,449,567 | 6.97 | $76,083,551 | 30-Sep-09 | | RS Investment Management Co., LLC | 1,974,616 | 5.62 | $61,331,572 | 30-Sep-09 | | RENAISSANCE TECHNOLOGIES, LLC | 1,867,799 | 5.31 | $58,013,836 | 30-Sep-09 | | Shamrock Capital Advisors, Inc. | 1,695,686 | 4.82 | $52,668,007 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 1,547,900 | 4.40 | $48,077,774 | 30-Sep-09 | | ACADIAN ASSET MANAGEMENT | 1,140,064 | 3.24 | $35,410,387 | 30-Sep-09 | | FRONTIER CAPITAL MANAGEMENT COMPANY INC | 1,133,955 | 3.23 | $35,220,642 | 30-Sep-09 | | Bank of New York Mellon Corporation | 1,033,321 | 2.94 | $32,094,950 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | RS INVESTMENT TRUST-PARTNERS FUND | 1,429,670 | 4.07 | $44,405,550 | 30-Sep-09 | | ISHARES RUSSELL 2000 INDEX FD | 518,718 | 1.48 | $16,111,381 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 493,705 | 1.40 | $16,203,398 | 30-Jun-09 | | ISHARES S&P SMALLCAP 600 INDEX FD | 457,153 | 1.30 | $14,688,325 | 31-Oct-09 | | BLACKROCK FUNDS-SMALL CAP GROWTH EQUITY PORTFOLIO | 400,500 | 1.14 | $13,144,410 | 30-Jun-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 377,092 | 1.07 | $12,376,159 | 30-Jun-09 | | AMERICAN CENTURY SMALL CAP VALUE FUND | 340,000 | .97 | $10,560,400 | 30-Sep-09 | | ISHARES RUSSELL 2000 VALUE INDEX FD | 297,598 | .85 | $9,243,393 | 30-Sep-09 | | Columbia Fds Ser Tr-Columbia Small Cap Value II Fd | 275,000 | .78 | $8,824,750 | 31-Aug-09 | | IShares S&P Small Cap 600 Growth Index Fund | 268,980 | .77 | $8,642,327 | 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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