13G Filing: Partner Fund Management and Medicines Co (MDCO)

CUSIP No. 584688105

13G

Page 8 of 13 Pages

Item 1(a)

Name of Issuer

The Medicines Company

 

Item 1(b)

Address of Issuer’s Principal Executive Offices 8 Sylvan Way, Parsippany, New Jersey 07054

 

Item 2(a)

Name of Person Filing

This Schedule 13G is being jointly filed
by Partner Fund Management, L.P. (“PFM”), Partner Fund Management GP, LLC (“PFM-GP”), Partner Investment
Management, L.P. (“PIM”), Partner Investment Management GP, LLC (“PIM-GP”), Brian D. Grossman (“Grossman”)
and Christopher M. James (“James” and, collectively with PFM, PFM-GP, PIM, PIM-GP and Grossman, the “Reporting
Persons”) with respect to shares of common stock (and options to purchase and/or other securities convertible into common
stock) of the above-named issuer owned by PFM Healthcare Master Fund, L.P., a Cayman Islands limited partnership (“HCM”),
PFM Healthcare Opportunities Master Fund, L.P., a Cayman Islands limited partnership (“HCOPP”), PFM Healthcare Principals
Fund, L.P., a Delaware limited partnership (“HCP”), PFM Healthcare Emerging Growth Master Fund, L.P., a Cayman Islands
limited partnership (“HEGM”), PFM Global Long Alpha Master Fund, L.P., a Cayman Islands limited partnership (“GLAM”),
PFM Diversified Principals Fund, L.P., a Delaware limited partnership (“DP”), PFM Diversified Master Fund, L.P., a
Cayman Islands limited partnership (“DM”), PFM Diversified Institutional Master Fund, L.P., a Cayman Islands limited
partnership (“DI” and, collectively with HCM, HCOPP, HCP, HEGM, GLAM, DP and DM, the “Funds”).

PFM is the investment advisor for HCM, HCOPP, HEGM, GLAM, DM and DI. PIM is the investment advisor for HCP and DP. PFM-GP and PIM-GP are, respectively, the general partners of PFM and PIM. Grossman is the portfolio manager for the health care strategy for the Funds. James is the portfolio manager for the diversified strategy for the Funds. Grossman and James are co-managing members of PFM-GP and PIM-GP.

The filing of this statement shall not be construed as an admission that any of the Reporting Persons is the beneficial owner of any securities covered by the statement other than the securities actually owned by such person (if any).

 

Item 2(b)

Address of Principal Business Office

The address of the principal business
office of each of the Reporting Persons is c/o Partner Fund Management, L.P., 4 Embarcadero Center, Suite 3500, San Francisco,
CA 94111.

Item 2(c)

Citizenship

Each
of PFM and PIM is organized as a limited partnership under the laws of the State of Delaware. Each of PFM-GP and PIM-GP is organized
as a limited liability company under the laws of the State of Delaware. Each of Grossman and James is a U.S. citizen.

Item 2(d)

Title of Class of Securities

Common stock, $0.001
par value