Our Terms of Service and Privacy Policy have changed.

By continuing to use this site, you are agreeing to the new Privacy Policy and Terms of Service.

BATS BZX Real-Time Price
As of 1:10pm ET
 +0.47 / +0.30%
Today’s Change
Today|||52-Week Range
Institutional investors purchased a net $3.8 million shares of TSRO during the quarter ended December 2016 and now own 85.86% of the total shares outstanding. This majority interest is a greater percentage than is typical for companies in the Biotechnology industry and highlights that the smart money sees this stock as an important holding.
Mutual fund holders63.70%
Individual stakeholders32.09%
Other institutional22.16%

Largest Quarterly Institutional

Latest Institutional Activity

12/31/2016T. ROWE PRICE ASSOCIATES, INC.  Bought 1.5 Million shares of TESARO Inc
12/31/2016FRANKLIN ADVISERS, INC.  Bought 534.7 Thousand shares of TESARO Inc
12/31/2016WELLINGTON MANAGEMENT CO. LLP  Bought 508.4 Thousand shares of TESARO Inc

Top 10 Owners of TESARO Inc

Total value ($)Shares
bought / sold
Fidelity Management & Research Co...14.23%7,629,2011,437,112,592+269,027+3.66%
T. Rowe Price Associates, Inc.13.28%7,119,2541,341,053,876+1,534,975+27.49%
Wellington Management Co. LLP6.41%3,439,422647,883,922+508,395+17.35%
Franklin Advisers, Inc.5.67%3,042,049573,030,770+534,711+21.33%
The Vanguard Group, Inc.5.24%2,812,373529,766,702+315,469+12.63%
BlackRock Fund Advisors4.76%2,554,429481,177,791+250,001+10.85%
Oracle Investment Management, Inc...2.33%1,248,086235,101,960+93,764+8.12%
SSgA Funds Management, Inc.1.84%988,072186,123,123-185,353-15.80%
Bellevue Asset Management AG1.82%974,582183,582,01100.00%
Janus Capital Management LLC1.42%763,345143,791,298+53,421+7.52%

Top 10 Mutual Funds Holding TESARO Inc

Mutual fundStakeShares
Total value ($)Shares
bought / sold
T Rowe Price Health Sciences Fund4.16%2,232,300420,498,351+124,655+5.91%
Fidelity OTC Portfolio3.62%1,941,500365,720,355-49,800-2.50%
T Rowe Price New Horizons Fund3.27%1,755,329330,651,324+257,586+17.20%
Fidelity Select Biotechnology Por...2.60%1,393,607262,513,751-84,500-5.72%
BB Biotech AG2.15%1,154,582217,488,611-75,000-6.10%
FTIF SICAV - Biotechnology Discov...2.15%1,153,300217,247,121+110,900+10.64%
Fidelity Contrafund1.58%849,700160,057,989-15,400-1.78%
Vanguard Small Cap Index Fund1.58%848,454159,823,280+13,550+1.62%
Vanguard Total Stock Market Index...1.51%809,807152,543,345+18,249+2.31%
iShares Nasdaq Biotechnology ETF1.33%713,529134,407,458-10,552-1.46%