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During the Trading Day
51.48 -1.88 / -3.52%
As of 3:59pm ET
Day’s Change
During After-Hours   Switch to standard view »
51.75 +0.27 / +0.52%
Volume: 31.0K
Institutional investors purchased a net $169.4 thousand shares of TSRO during the quarter ended June 2015, and now own 81.93% of the total float, a percentage that is typical for companies in the Biotechnology industry.
Mutual fund holders51.23%
Individual stakeholders36.16%
Other institutional30.71%

Largest Quarterly Institutional

Latest Institutional Activity

6/30/2015FIDELITY MANAGEMENT & RESEARCH C...  Bought 516.6 Thousand shares of TESARO Inc
6/30/2015PUTNAM INVESTMENT MANAGEMENT LLC  Bought 276.0 Thousand shares of TESARO Inc
6/30/2015BLACKROCK ADVISORS LLC  Bought 271.0 Thousand shares of TESARO Inc

Top 10 Owners of TESARO Inc

Total value ($)Shares
bought / sold
Fidelity Management & Research Co...13.94%5,576,252323,422,616+516,647+10.21%
T. Rowe Price Associates, Inc.9.02%3,606,542209,179,436+68,018+1.92%
Wellington Management Co. LLP8.47%3,388,225196,517,050-876,479-20.55%
OrbiMed Advisors LLC5.18%2,071,480120,145,840+13,780+0.67%
The Vanguard Group, Inc.4.17%1,666,25996,643,022+83,794+5.30%
BlackRock Fund Advisors3.60%1,438,20483,415,832+30,051+2.13%
AllianceBernstein LP2.48%993,31757,612,386-117,634-10.59%
Point72 Asset Management LP2.34%934,50054,201,000+119,600+14.68%
Bellevue Asset Management AG2.29%914,88253,063,156+50,000+5.78%
Perceptive Advisors LLC2.09%835,35948,450,822-143,000-14.62%

Top 10 Mutual Funds Holding TESARO Inc

Mutual fundStakeShares
Total value ($)Shares
bought / sold
Fidelity Select Biotechnology Por...5.37%2,149,849124,691,24200.00%
T Rowe Price Health Sciences Fund3.60%1,439,93783,516,346+308,099+27.22%
Fidelity Select Health Care Portf...2.35%940,00054,520,00000.00%
BB Biotech AG2.14%854,58249,565,756+150,000+21.29%
T Rowe Price New Horizons Fund1.96%784,24145,485,978+303,560+63.15%
SPDR S&P Biotech ETF1.25%501,62329,094,134+34,272+7.33%
Vanguard Small Cap Index Fund1.24%495,85828,759,764+3,447+0.70%
Fidelity OTC Portfolio1.16%465,80027,016,40000.00%
Lord Abbett Developing Growth Fun...1.15%459,46926,649,202+459,469--
Vanguard Total Stock Market Index...1.13%452,75526,259,79000.00%