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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	Acquisiton	2012-07-03	10,388,144	$0.00	10,388,144	No	4	C	Indirect	See Note 2
Common Stock	Acquisiton	2012-07-03	1,111,111	$13.50	11,499,255	No	4	P	Indirect	See Note 2

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series A Preferred Stock	Disposition	2012-07-03	5,134,285	$0.00	5,134,285	$0.00
Common Stock	Series B Preferred Stock	Disposition	2012-07-03	5,253,859	$0.00	5,253,859	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Indirect
0			No	4	C	Indirect

Footnotes

Effective upon the closing of the Issuer's initial public offering of its common stock, each share of convertible preferred stock automatically converted into one share of common stock. The convertible preferred stock had no expiration date.
The Reporting Person is a director of NEA 13 GP, LTD, the sole general partner of NEA Partners 13, L.P., the sole general partner of New Enterprise Associates 13, L.P. ("NEA 13"), which is the direct beneficial owner of the securities. 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 NEA 13 shares in which the Reporting Person has no pecuniary interest.