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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
1302600	C Edward English	C/O Tesaro, Inc. 1000 Winter Street, Suite 3300 Waltham MA 02451	Vp Finance And Administration	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock, Par Value $.01	Acquisiton	2015-12-10	12,000	$13.31	12,000	No	4	M	Direct
Common Stock, Par Value $.01	Acquisiton	2015-12-10	5,000	$34.58	17,000	No	4	M	Direct
Common Stock, Par Value $.01	Disposition	2015-12-10	50	$49.52	16,950	No	4	S	Direct
Common Stock, Par Value $.01	Disposition	2015-12-10	16,950	$50.19	0	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (right to buy)	Disposition	2015-12-10	12,000	$0.00	12,000	$13.31
Common Stock	Employee Stock Option (right to buy)	Disposition	2015-12-10	5,000	$0.00	5,000	$34.58

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
16,572		2022-09-09	No	4	M	Direct
10,000		2023-08-30	No	4	M	Direct

Footnotes

The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 9, 2015.
The price reported is a weighted average. The shares were sold in multiple transactions at prices ranging from $49.552 to $50.55, inclusive. The reporting person undertakes to provide to TESARO, Inc., any security holder of TESARO, Inc., 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 ranges set forth herein.
A quarter of the options vested on June 11, 2013 and, thereafter, 1/36th of the remaining options vest on each monthly anniversary of such date until fully vested.
A quarter of the options vested on August 30, 2014 and, thereafter, 1/36th of the remaining options vest on each monthly anniversary of such date until fully vested.