| 56.03 Data as of May 23 |  -0.08 / -0.14%Today’s Change | 36.73 Today|||52-Week Range 56.54 | +33.25% Year-to-Date |
| Mutual fund holders | 65.46% |
| Other institutional | 47.49% |
| Individual stakeholders | 1.21% |
| 3/31/2013 | POINTSTATE CAPITAL LP Bought 975.9 Thousand shares of Cubist Pharmaceuticals In... |
| 3/31/2013 | S.A.C. CAPITAL ADVISORS LP Bought 949.5 Thousand shares of Cubist Pharmaceuticals In... |
| 3/31/2013 | HEALTHCOR MANAGEMENT LP Bought 600.0 Thousand shares of Cubist Pharmaceuticals In... |
| Stockholder | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Wellington Management Co. LLP | 9.68% | 6,313,066 | 289,895,991 | -635,135 | -9.14% |
| BlackRock Fund Advisors | 8.52% | 5,552,489 | 254,970,295 | +407,101 | +7.91% |
| T. Rowe Price Associates, Inc. | 6.70% | 4,368,900 | 200,619,888 | +32,100 | +0.74% |
| The Vanguard Group, Inc. | 6.54% | 4,265,535 | 195,873,367 | +56,183 | +1.33% |
| Federated Investment Management C... | 3.48% | 2,270,800 | 104,275,136 | -672,950 | -22.86% |
| Putnam Investment Management LLC | 3.48% | 2,265,907 | 104,050,449 | +31,802 | +1.42% |
| SSgA Funds Management, Inc. | 2.83% | 1,847,110 | 84,819,291 | +16,161 | +0.88% |
| BlackRock Advisors LLC | 2.66% | 1,733,328 | 79,594,422 | -752,956 | -30.28% |
| Wells Capital Management, Inc. | 2.65% | 1,728,389 | 79,367,623 | +25,338 | +1.49% |
| Eagle Asset Management, Inc. | 2.49% | 1,625,196 | 74,629,000 | -82,006 | -4.80% |
| Mutual fund | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Federated Kaufmann Fund | 3.10% | 2,020,000 | 92,758,400 | 0 | 0.00% |
| Vanguard Health Care Fund | 2.03% | 1,323,142 | 60,758,681 | 0 | 0.00% |
| iShares Core S&P Small Cap ETF | 1.74% | 1,131,626 | 51,964,266 | +24,800 | +2.24% |
| Vanguard Small Cap Index Fund | 1.63% | 1,060,990 | 48,720,661 | +36,640 | +3.58% |
| T Rowe Price Health Sciences Fund | 1.57% | 1,025,000 | 47,068,000 | 0 | 0.00% |
| iShares Russell 2000 Index Fund | 1.53% | 1,000,378 | 45,937,358 | -14,250 | -1.40% |
| T Rowe Price Mid Cap Growth Fund | 1.53% | 1,000,000 | 45,920,000 | 0 | 0.00% |
| Putnam Capital Spectrum Fund | 1.43% | 931,870 | 42,791,470 | 0 | 0.00% |
| Vanguard Total Stock Market Index... | 1.31% | 850,670 | 39,062,766 | +43,001 | +5.32% |
| T Rowe Price Small Cap Stock Fund | 1.27% | 828,400 | 38,040,128 | -1,000 | -0.12% |
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