| 35.91 Data as of May 17 |  +0.03 / +0.08%Today’s Change | 11.05 Today|||52-Week Range 37.80 | +111.86% Year-to-Date |
| Mutual fund holders | 8.96% |
| Individual stakeholders | 57.98% |
| Other institutional | 29.11% |
| 3/31/2013 | WELLINGTON MANAGEMENT CO. LLP Bought 1.9 Million shares of TESARO Inc |
| 3/31/2013 | FIDELITY MANAGEMENT & RESEARCH C... Bought 759.7 Thousand shares of TESARO Inc |
| 3/31/2013 | POLAR CAPITAL LLP Bought 394.0 Thousand shares of TESARO Inc |
| Stockholder | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Wellington Management Co. LLP | 10.17% | 3,311,902 | 91,110,424 | +1,916,182 | +137.29% |
| T. Rowe Price Associates, Inc. | 4.43% | 1,444,991 | 39,751,702 | -3,800 | -0.26% |
| AllianceBernstein LP | 2.34% | 763,510 | 21,004,160 | -36,426 | -4.55% |
| Fidelity Management & Research Co... | 2.33% | 759,700 | 20,899,347 | +759,700 | -- |
| Oracle Investment Management, Inc... | 2.08% | 677,112 | 18,627,351 | +20,300 | +3.09% |
| VHCP Management LLC | 2.02% | 656,813 | 18,068,926 | 0 | 0.00% |
| Adage Capital Management LP | 1.53% | 497,269 | 13,679,870 | +247,380 | +99.00% |
| Deerfield Management Co. LP | 1.39% | 452,105 | 12,437,409 | +189,379 | +72.08% |
| Columbia Management Investment Ad... | 1.39% | 451,687 | 12,425,909 | -8,761 | -1.90% |
| Polar Capital LLP | 1.21% | 394,049 | 10,840,288 | +394,049 | -- |
| Mutual fund | Stake | Shares owned | Total value ($) | Shares bought / sold | Total change |
|---|---|---|---|---|---|
| Polar Capital Funds Plc - Healthc... | 1.05% | 340,943 | 9,379,342 | +12,416 | +3.78% |
| Hartford Healthcare Fund | 1.01% | 330,000 | 9,078,300 | +330,000 | -- |
| Columbia Small Cap Growth Fund I | 0.86% | 281,258 | 7,737,408 | 0 | 0.00% |
| AllianceBernstein Small Cap Growt... | 0.81% | 263,160 | 7,239,532 | +58,270 | +28.44% |
| Prudential Jennison Health Scienc... | 0.67% | 219,505 | 6,038,583 | +219,505 | -- |
| T Rowe Price Health Sciences Fund | 0.62% | 201,100 | 5,532,261 | -648,900 | -76.34% |
| Principal Investors-Small Cap Gro... | 0.46% | 150,612 | 4,143,336 | -20,729 | -12.10% |
| Putnam Global Health Care Fund | 0.35% | 113,246 | 3,115,397 | 0 | 0.00% |
| Vanguard Small Cap Index Fund | 0.28% | 89,546 | 2,463,410 | +89,546 | -- |
| Hartford Small Cap Growth HLS Fun... | 0.27% | 88,510 | 2,434,910 | -1,320 | -1.47% |
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