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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
1277478	Glenn Sblendorio	8 Sylvan Way Parsippany NJ 07054	President & Cfo	Yes	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	Disposition	2012-08-10	8,989	$25.09	96,877	No	4	S	Direct
Common Stock	Acquisiton	2012-08-10	25,000	$17.45	121,877	No	4	M	Direct
Common Stock	Disposition	2012-08-10	25,000	$25.15	96,877	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
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	Option(right to buy)	Disposition	2012-08-10	25,000	$0.00	25,000	$17.45

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
65,000		2021-02-18	No	4	M	Direct

Footnotes

The range of prices for the transactions reported on this line is between $25.01 and $25.21 per share. The price reported above reflects the weighted average sales price. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
The range of prices for the transactions reported on this line is between $25.10 and $25.23 per share. The price reported above reflects the weighted average sales price. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares sold at each separate price.
As of 8/10/2012, the original grant (90,000 shares granted on 2/18/2011) was vested with respect to 31,875 of the shares covered thereby and the remaining 58,125 shares covered by this option vest in equal monthly installments ending on 2/18/2015. After the exercise of the options reported hereby, as of 8/10/2012, 6,875 of the shares covered by the option were vested but not exercised.