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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1113481	Medicines Co	MDCO	Pharmaceutical Preparations (2834)	043324394

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1427141	Bernard William O'connor	8 Sylvan Way Parsippany NJ 07054	Svp & Chief Acct. Officer	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	Acquisiton	2015-03-01	4,953	$0.00	31,020	No	4	A	Direct
Common Stock	Disposition	2015-03-02	2,988	$28.78	28,032	No	4	S	Direct
Common Stock	Disposition	2015-03-02	2,019	$28.93	26,013	No	4	F	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (right-to-buy)	Acquisiton	2015-03-01	29,688	$0.00	29,688	$28.77

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
29,688		2025-03-01	No	4	A	Direct

Footnotes

Shares of restricted stock vest in 25% increments on each anniversary of the date of grant, until fully vested.
Sales of common stock were effected pursuant to a Rule 10b5-1 program adopted by the reporting person on March 15, 2013.
Shares of common stock were withheld for payment of taxes in connection with the vesting of 5,349 shares of restricted stock from previously reported grants.
The option vests in forty-eight equal installments beginning April 1, 2015.