| 4.19 Data as of May 23 |  +0.04 / +0.96%Today’s Change | 3.21 Today|||52-Week Range 11.30 | -13.61% Year-to-Date |
| Other institutional | 45.36% |
| Individual stakeholders | 35.51% |
| Mutual fund holders | 27.47% |
| 3/31/2013 | THE BAUPOST GROUP LLC Bought 5.3 Million shares of Idenix Pharmaceuticals In... |
| 3/31/2013 | CAMBER CAPITAL MANAGEMENT LLC Bought 1.1 Million shares of Idenix Pharmaceuticals In... |
| 3/31/2013 | RENAISSANCE TECHNOLOGIES LLC Bought 575.9 Thousand shares of Idenix Pharmaceuticals In... |
| Stockholder | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| The Baupost Group LLC | 19.44% | 26,042,000 | 96,355,400 | +5,337,300 | +25.78% |
| Brookside Capital LLC | 9.45% | 12,664,950 | 46,860,315 | 0 | 0.00% |
| T. Rowe Price Associates, Inc. | 8.73% | 11,698,252 | 43,283,532 | -60,686 | -0.52% |
| BlackRock Fund Advisors | 4.42% | 5,915,482 | 21,887,283 | +432,938 | +7.90% |
| The Vanguard Group, Inc. | 4.14% | 5,550,534 | 20,536,976 | +238,634 | +4.49% |
| SSgA Funds Management, Inc. | 2.42% | 3,238,436 | 11,982,213 | -312,043 | -8.79% |
| Camber Capital Management LLC | 2.05% | 2,750,000 | 10,175,000 | +1,050,000 | +61.76% |
| Fred Alger Management, Inc. | 1.71% | 2,290,924 | 8,476,419 | +90,637 | +4.12% |
| Columbia Management Investment Ad... | 1.45% | 1,936,385 | 7,164,625 | -96,570 | -4.75% |
| Westfield Capital Management Co. ... | 1.43% | 1,916,564 | 7,091,287 | -101,300 | -5.02% |
| Mutual fund | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| T Rowe Price Health Sciences Fund | 2.99% | 4,000,000 | 14,800,000 | +1,050,000 | +35.59% |
| T Rowe Price New Horizons Fund | 2.54% | 3,400,000 | 12,580,000 | +1,000,000 | +41.67% |
| SPDR S&P Biotech ETF | 1.32% | 1,767,218 | 6,538,707 | +45,025 | +2.61% |
| Vanguard Small Cap Index Fund | 1.21% | 1,624,800 | 6,011,760 | +42,430 | +2.68% |
| T Rowe Price Small Cap Stock Fund | 1.12% | 1,499,900 | 5,549,630 | -2,000 | -0.13% |
| Janus Global Life Sciences Fund | 1.12% | 1,498,030 | 5,542,711 | -140,302 | -8.56% |
| iShares Russell 2000 Index Fund | 1.07% | 1,430,286 | 5,292,058 | -17,490 | -1.21% |
| Vanguard Total Stock Market Index... | 0.96% | 1,280,090 | 4,736,333 | +40,200 | +3.24% |
| BB Biotech AG | 0.93% | 1,250,000 | 4,625,000 | 0 | 0.00% |
| Columbia Small Cap Growth Fund I | 0.87% | 1,168,507 | 4,323,476 | 0 | 0.00% |
.
