| TOP INSTITUTIONAL HOLDERS |
| Holder | Shares | % Out | Value* | Reported | | Aletheia Research & Management, Inc. | 4,261,556 | 5.24 | $119,579,261 | 30-Sep-09 | | PRICE (T.ROWE) ASSOCIATES INC | 3,644,710 | 4.48 | $102,270,562 | 30-Sep-09 | | VANGUARD GROUP, INC. (THE) | 3,603,578 | 4.43 | $101,116,398 | 30-Sep-09 | | Barclays Global Investors UK Holdings Ltd | 2,913,452 | 3.58 | $81,751,463 | 30-Sep-09 | | OSTERWEIS CAPITAL MANAGEMENT, INC. | 2,596,272 | 3.19 | $72,851,392 | 30-Sep-09 | | ValueAct Holdings, L.P. | 17,775,903 | 21.85 | $498,791,838 | 30-Sep-09 | | Clearbridge Advisors, LLC | 2,356,913 | 2.90 | $66,134,978 | 30-Sep-09 | | Invesco Ltd. | 1,963,585 | 2.41 | $55,098,195 | 30-Sep-09 | | IRIDIAN ASSET MANAGEMENT LLC | 10,598,744 | 13.03 | $297,400,756 | 30-Sep-09 | | HEALTHCOR MANAGEMENT LP | 10,000,000 | 12.29 | $280,600,000 | 30-Sep-09 |
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| Holder | Shares | % Out | Value* | Reported | | PRICE (T.ROWE) MID CAP GROWTH FUND | 2,550,000 | 3.14 | $71,553,000 | 30-Sep-09 | | FIDELITY CONTRAFUND INC | 2,019,474 | 2.48 | $59,372,535 | 31-Oct-09 | | FIRST EAGLE FUND OF AMERICA, INC. | 1,706,950 | 2.10 | $44,039,310 | 31-Jul-09 | | Legg Mason Partners Aggressive Growth Fd | 1,182,691 | 1.45 | $33,186,309 | 30-Sep-09 | | VANGUARD SMALL-CAP INDEX FUND | 944,609 | 1.16 | $24,295,343 | 30-Jun-09 | | VANGUARD TOTAL STOCK MARKET INDEX FUND | 717,570 | .88 | $18,455,900 | 30-Jun-09 | | VANGUARD SMALL-CAP GROWTH INDEX FUND | 597,507 | .73 | $15,367,880 | 30-Jun-09 | | PROFESSIONALLY MANAGED PORTF-OSTERWEIS FUND | 576,445 | .71 | $16,175,046 | 30-Sep-09 | | PRINCIPAL MID CAP BLEND FD | 570,937 | .70 | $16,020,492 | 30-Sep-09 | | VANGUARD EXTENDED MARKET INDEX FUND | 499,917 | .61 | $12,857,865 | 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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