Page 8 of 13 – SEC Filing
CUSIP No. 09627Y109 13G Page 8 of 13 Pages
Item 1(a) Name of Issuer Blueprint Medicines Corporation Item 1(b) Address of Issuer’s Principal Executive Offices 38 Sidney Street, Suite 200, Cambridge, Massachusetts 02139 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 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”), and PFM Oncology Opportunities Master Fund, L.P., a Cayman Islands limited partnership (“ONCOPP” and, collectively with HCM, HCOPP, HCP and HEGM, the “Funds”). PFM is the investment advisor for HCM, HCOPP, HEGM and ONCOPP. PIM is the investment advisor for HCP. 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 chief investment officer for PIM and PFM and member manager 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 Item 2(e) CUSIP Number 09627Y109
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| CUSIP No. 09627Y109 | 13G | Page 8 of 13 Pages |
| Item 1(a) | Name of Issuer |
| Blueprint Medicines Corporation | |
| Item 1(b) | Address of Issuer’s Principal Executive Offices |
| 38 Sidney Street, Suite 200, Cambridge, Massachusetts 02139 | |
| 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 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”), and PFM Oncology Opportunities Master Fund, L.P., a Cayman Islands limited partnership (“ONCOPP” and, collectively with HCM, HCOPP, HCP and HEGM, the “Funds”). | |
| PFM is the investment advisor for HCM, HCOPP, HEGM and ONCOPP. PIM is the investment advisor for HCP. 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 chief investment officer for PIM and PFM and member manager 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 | |
| Item 2(e) | CUSIP Number |
| 09627Y109 |
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