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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1491576	Tesaro Inc.	TSRO	Pharmaceutical Preparations (2834)	272249687

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1362942	R Harry Weller	1954 Greenspring Drive Suite 600 Timonium MD 21093		No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2013-06-10	560	$41.45	0	No	4	S	Indirect	See Note 2

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See Note 2

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	9,854,255	Indirect	See Note 3

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.43 to $41.49, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.
The shares are directly held by the Harry Richard Weller Revocable Trust, Harry Richard Weller and Rachel Moore Weller, Trustees dtd November 29, 2007 (the "Harry Weller 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 the shares held by the Harry Weller Trust, except to the extent of his pecuniary interest therein.
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, Limited Partnership ("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.