0001209191-14-031919.txt : 20140507 0001209191-14-031919.hdr.sgml : 20140507 20140507174143 ACCESSION NUMBER: 0001209191-14-031919 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20140505 FILED AS OF DATE: 20140507 DATE AS OF CHANGE: 20140507 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: ACCELERON PHARMA INC CENTRAL INDEX KEY: 0001280600 STANDARD INDUSTRIAL CLASSIFICATION: BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836] IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 128 SYDNEY STREET CITY: CAMBRIDGE STATE: MA ZIP: 02139 BUSINESS PHONE: 617-649-9200 MAIL ADDRESS: STREET 1: 128 SYDNEY STREET CITY: CAMBRIDGE STATE: MA ZIP: 02139 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: POLARIS VENTURE PARTNERS IV LP CENTRAL INDEX KEY: 0001157864 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36065 FILM NUMBER: 14822226 BUSINESS ADDRESS: STREET 1: 1000 WINTER STREET STREET 2: SUITE 3350 CITY: WALTHAM STATE: MA ZIP: 024511215 BUSINESS PHONE: 7812900770 MAIL ADDRESS: STREET 1: 1000 WINTER STREET STREET 2: SUITE 3350 CITY: WALTHAM STATE: MA ZIP: 02451 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: POLARIS VENTURE PARTNERS ENTREPRENEURS FUND IV LP CENTRAL INDEX KEY: 0001170720 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36065 FILM NUMBER: 14822227 BUSINESS ADDRESS: STREET 1: 1000 WINTER STREET STREET 2: SUITE 3350 CITY: WALTHAM STATE: MA ZIP: 02451-1215 BUSINESS PHONE: 7812900770 MAIL ADDRESS: STREET 1: 1000 WINTER STREET STREET 2: SUITE 3350 CITY: WALTHAM STATE: MA ZIP: 02451 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Polaris Venture Management Co IV LLC CENTRAL INDEX KEY: 0001295438 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36065 FILM NUMBER: 14822228 BUSINESS ADDRESS: STREET 1: 1000 WINTER STREET STREET 2: SUITE 3350 CITY: WALTHAM STATE: MA ZIP: 02451 BUSINESS PHONE: 7812900770 MAIL ADDRESS: STREET 1: 1000 WINTER STREET STREET 2: SUITE 3350 CITY: WALTHAM STATE: MA ZIP: 02451 4 1 doc4.xml FORM 4 SUBMISSION X0306 4 2014-05-05 0 0001280600 ACCELERON PHARMA INC XLRN 0001295438 Polaris Venture Management Co IV LLC C/O POLARIS VENTURE PARTNERS 1000 WINTER STREET SUITE 3350 WALTHAM MA 02451 0 0 1 0 0001170720 POLARIS VENTURE PARTNERS ENTREPRENEURS FUND IV LP C/O POLARIS VENTURE PARTNERS 1000 WINTER STREET SUITE 3350 WALTHAM MA 02451 0 0 1 0 0001157864 POLARIS VENTURE PARTNERS IV LP C/O POLARIS VENTURE PARTNERS 1000 WINTER STREET SUITE 3350 WALTHAM MA 02451 0 0 1 0 Common Stock 2014-05-05 4 S 0 313491 42.86 D 2819743 I See footnote Represents 307,893 shares and 5,598 shares that were held directly by Polaris Venture Partners IV, L.P. ("PVP IV") and Polaris Venture Partners Entrepreneurs Fund IV, L.P. ("PVPE IV" and, together with PVP IV, the "Funds"), respectively. Polaris Venture Management Co. IV, L.L.C. ("PVM IV") is the general partner of the Funds. PVM IV disclaims beneficial ownership of these securities and this report shall not be deemed an admission that PVM IV is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of its pecuniary interest, if any, therein. (Continued from footnote 1) Each of Jonathan A. Flint, Terrance G. McGuire and Alan G. Spoon are the managing members of PVM IV. Each of Messrs. Flint, McGuire and Spoon disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their pecuniary interest, if any, therein. Represents 2,769,495 shares and 50,248 shares that are held directly by PVP IV and PVPE IV, respectively. PVM IV disclaims beneficial ownership of these securities and this report shall not be deemed an admission that PVM IV is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of its pecuniary interest, if any, therein. Each of Jonathan A. Flint, Terrance G. McGuire and Alan G. Spoon are the managing members of PVM IV. Each of Messrs. Flint, McGuire and Spoon disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their pecuniary interest, if any, therein. Polaris Venture Management Co. IV, L.L.C., By: /s/ Terrance McGuire 2014-05-06 Polaris Venture Partners IV, L.P., By: /s/ Terrance McGuire 2014-05-06 Polaris Venture Partners Entrepreneurs Fund IV, L.P., By: /s/ Terrance McGuire 2014-05-06