X0306 4 2013-06-04 0 0001491576 TESARO, Inc. TSRO 0001270521 KOLLURI KRISHNA KITTU 1954 GREENSPRING DRIVE SUITE 600 TIMONIUM MD 21093 0 0 1 0 Common Stock 2013-06-04 4 J 0 1645000 0 D 9854255 I See Note 2 Common Stock 2013-06-04 4 J 0 16450 0 A 16450 I See Note 4 Common Stock 2013-06-04 4 J 0 16450 0 D 0 I See Note 4 Common Stock 2013-06-04 4 J 0 610 0 A 610 I See Note 7 Common Stock 2013-06-04 4 J 0 110 0 A 110 I See Note 9 Common Stock 2013-06-04 4 J 0 110 0 A 110 I See Note 11 New Enterprise Associates 13, Limited Partnership ("NEA 13") made a pro rata distribution for no consideration of an aggregate of 1,645,000 shares of common stock of the Issuer to its general partner and its limited partners on June 4, 2013. 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 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 the shares held by NEA 13, except to the extent of his pecuniary interest therein. NEA Partners 13 received 16,450 shares of common stock of the Issuer in the distribution by NEA 13 on June 4, 2013. The Reporting Person is a director of NEA 13 GP, LTD, which is the sole general partner of NEA Partners 13. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of the shares held by NEA Partners 13, except to the extent of his pecuniary interest therein. NEA Partners 13 made a pro rata distribution for no consideration of an aggregate of 16,450 shares of common stock of the Issuer to its limited partners on June 4, 2013. The Kolluri Living Trust dated 11/5/99 (the "Kolluri Trust") received 610 shares of common stock of the Issuer in the distribution by NEA Partners 13 on June 4, 2013. The shares are held directly by the Kolluri Trust. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the 1934 Act, as amended, of the shares held by the Kolluri Trust, except to the extent of his pecuniary interest therein. The Krishna S. Kolluri and Vanita S. Kolluri, as Trustees of the Ishaan S. Kolluri GST Exempt Trust under the Kolluri 2012 Trust Agreement dated November 16, 2012 (the "Ishaan S. Kolluri Trust") received 110 shares of common stock of the Issuer in the distribution by NEA Partners 13 on June 4, 2013. The shares are held directly by the Ishaan S. Kolluri Trust. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the 1934 Act, as amended, of the shares held by the Ishaan S. Kolluri Trust, except to the extent of his pecuniary interest therein. The Krishna S. Kolluri and Vanita S. Kolluri, as Trustees of the Raina V. Kolluri GST Exempt Trust under the Kolluri 2012 Trust Agreement dated November 16, 2012 (the "Raina V. Kolluri Trust") received 110 shares of common stock of the Issuer in the distribution by NEA Partners 13 on June 4, 2013. The shares are held directly by the Raina V. Kolluri Trust. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the 1934 Act, as amended, of the shares held by the Raina V. Kolluri Trust, except to the extent of his pecuniary interest therein. /s/ Louis Citron, attorney-in-fact 2013-06-05