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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
1528617	R Timothy Pearson	C/O Tesaro, Inc. 1000 Winter Street Waltham MA 02451	Exec. Vp, Cfo	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	Explanation
Common Stock	Acquisiton	2017-03-01	4,375	$0.00	4,375	No	4	M	Direct
Common Stock	Disposition	2017-03-02	1,447	$177.61	2,928	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Restricted Stock Units	Disposition	2017-03-01	4,375	$0.00	4,375	$0.00
Common Stock	Restricted Stock Units	Acquisiton	2017-03-01	5,930	$0.00	5,930	$0.00
Common Stock	Employee Stock Option (right to buy)	Acquisiton	2017-03-01	10,782	$0.00	10,782	$178.95

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
13,125		No	4	M	Direct
5,930		No	4	A	Direct
10,782	2027-03-01	No	4	A	Direct

Footnotes

This sale was effected pursuant to the terms of a 10b5-1 plan adopted by the reporting person and was made in order to pay the tax liability arising from the vesting of restricted stock units.
Each restricted stock unit represents a contingent right to receive one share of TESARO common stock.
The restricted stock units were granted on March 1, 2016 and vest in four equal annual installments beginning on March 1, 2017.
The restricted stock units vest in four equal annual installments beginning on March 1, 2018.
The option vests in 48 equal monthly installments beginning on April 1, 2017.