X0306 4 2016-03-18 0 0001491576 TESARO, Inc. TSRO 0001270521 KOLLURI KRISHNA KITTU 1954 GREENSPRING DRIVE SUITE 600 TIMONIUM MD 21093 0 0 1 0 Common Stock 2016-03-18 4 P 0 710429 0.00 A 9564684 I See Note 2 Common Stock 2016-03-18 4 P 0 710429 0.00 A 710429 I See Note 3 Common Stock 375 I See Note 4 The shares were acquired upon the closing of a private placement that was publicly disclosed by the Issuer on February 25, 2016. The Reporting Person is a director of NEA 13 GP, LTD, which is the sole general partner of NEA Partners 13, L.P. ("NEA Partners 13"). NEA Partners 13 is the sole general partner of New Enterprise Associates 13, L.P. ("NEA 13"), the direct beneficial owner of the shares. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the shares of the Issuer held by NEA 13 in which the Reporting Person has no pecuniary interest. The Reporting Person is a director of NEA 15 GP, LLC, which is the sole general partner of NEA Partners 15-OF, L.P. ("NEA Partners 15-OF"). NEA Partners 15-OF is the sole general partner of New 15 Opportunity Fund, L.P. ("NEA 15-OF"), the direct beneficial owner of the shares. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the shares of the Issuer held by NEA 15-OF in which the Reporting Person has no pecuniary interest. The shares are held directly by the Kolluri Living Trust dated 11/5/99 (the "Kolluri Trust"). The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the shares of the Issuer held by the Kolluri Trust in which the Reporting Person has no pecuniary interest. /s/ Louis Citron, attorney-in-fact 2016-03-18