-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, KDd2w6aKWUVDaw4wHBjtowTeRzvV0Z33Azhf96L0dEhwun7zfVzHFtqhT0my3kV6 fqg29CLVDN8+HuMdT+Bxcg== 0000950123-10-032698.txt : 20100407 0000950123-10-032698.hdr.sgml : 20100407 20100407100811 ACCESSION NUMBER: 0000950123-10-032698 CONFORMED SUBMISSION TYPE: 13F-HR/A PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20100331 FILED AS OF DATE: 20100407 DATE AS OF CHANGE: 20100407 EFFECTIVENESS DATE: 20100407 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MPM ASSET MANAGEMENT LLC CENTRAL INDEX KEY: 0001263048 IRS NUMBER: 043351032 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR/A SEC ACT: 1934 Act SEC FILE NUMBER: 028-13379 FILM NUMBER: 10735897 BUSINESS ADDRESS: STREET 1: THE JOHN HANCOCK TOWER STREET 2: 200 CLARENDON STREET, 54TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 BUSINESS PHONE: 6174259200 MAIL ADDRESS: STREET 1: THE JOHN HANCOCK TOWER STREET 2: 200 CLARENDON STREET, 54TH FLOOR CITY: BOSTON STATE: MA ZIP: 02116 13F-HR/A 1 w78009e13fvhrza.txt FORM 13F-HR/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2010 Check here if Amendment [X]; Amendment Number: 5 This Amendment (Check only one.): [ ] is a restatement. [X] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: MPM Asset Management LLC Address: The John Hancock Tower 200 Clarendon Street 54th Floor Boston, MA 02116 Form 13F File Number: 28-13379 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: Ansbert Gadicke Title: Member Phone: (617) 425-9200 Signature, Place, and Date of Signing: /s/ Ansbert Gadicke Boston, MA April 7, 2010 - ------------------------------------- -------------------- ----------------- [Signature] [City, State] [Date] [X] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) [ ] 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) [ ] 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).) FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: None Form 13F Information Table Entry Total: Eleven (11) Form 13F Information Table Value Total: $157,680 (thousands) List of Other Included Managers: None FORM 13F INFORMATION TABLE
VOTING AUTHORITY TITLE OF VALUE SHARES / SH / PUT / INVESTMENT OTHER ---------------------- NAME OF ISSUER CLASS CUSIP (X$1000) PRN AMT PRN CALL DISCRETION MANAGERS SOLE SHARED NONE - -------------- -------- --------- -------- ---------- ---- ----- ---------- -------- ---------- ------ ---- Affymax, Inc. COM 00826A109 33,750 1,440,469 SH N/A Sole N/A 1,440,469 N/A N/A Aryx Therapeutics, Inc. COM 043387109 4,667 5,364,572 SH N/A Sole N/A 5,364,572 N/A N/A AVEO Pharmaceuticals, Inc. COM 053588109 19,881 2,208,961 SH N/A Sole N/A 2,208,961 N/A N/A CombinatoRx, Inc. COM 20010A103 17,324 14,557,646 SH N/A Sole N/A 14,557,646 N/A N/A Cornerstone Therapeutics, Inc. COM 21924P103 829 130,496 SH N/A Sole N/A 130,496 N/A N/A EnteroMedics, Inc. COM 29365M109 2,953 5,790,841 SH N/A Sole N/A 5,790,841 N/A N/A Idenix Pharmaceuticals, Inc. COM 45166R204 9,367 3,321,534 SH N/A Sole N/A 3,321,534 N/A N/A PharmAthene, Inc. COM 71714G102 5,060 3,489,443 SH N/A Sole N/A 3,489,443 N/A N/A Poniard Pharmaceuticals, Inc. COM 732449301 7,318 6,363,249 SH N/A Sole N/A 6,363,249 N/A N/A SenoRx, Inc. COM 81724W104 16,414 2,242,379 SH N/A Sole N/A 2,242,379 N/A N/A Somaxon Pharmaceuticals, Inc. COM 834453102 40,118 4,632,562 SH N/A Sole N/A 4,632,562 N/A N/A
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