Institutional investors purchased a net $5.6 million shares of TSRO during the quarter ended December 2012, and now own 38.07% of the total float, a percentage that is typical for companies in the Biotechnology industry.
Mutual fund holders
Largest Quarterly Institutional Transactions
Latest Institutional Activity
WELLINGTON MANAGEMENT CO. LLP Bought 1.9 Million shares of TESARO Inc
FIDELITY MANAGEMENT & RESEARCH C... Bought 759.7 Thousand shares of TESARO Inc
POLAR CAPITAL LLP Bought 394.0 Thousand shares of TESARO Inc