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Filing Details

Accession Number:
0000899243-15-004081
Form Type:
4/A
Zero Holdings:
No
Publication Time:
2015-08-26 20:09:32
Reporting Period:
2015-08-17
Filing Date:
2015-08-26
Accepted Time:
2015-08-26 20:09:32
Original Submission Date:
2015-08-19
SEC Url:
Form 4 Filing
Issuer
Cik Name Symbol Sector (SIC) IRS No
1280600 Acceleron Pharma Inc XLRN Biological Products, (No Disgnostic Substances) (2836) 000000000
Insiders
Cik Name Reported Address Insider Title Director Officer Large Shareholder Other
1117003 Terrance Mcguire C/o Polaris Venture Partners
1000 Winter Street
Waltham MA 02451
Yes No No No
Reported Non-Derivative Transactions
Sec. Name Acquisiton - Disposition Date Amount Price Remaning Holdings Equity Swap Involved Form Type Code Nature of Ownership Explanation
Common Stock Disposition 2015-08-17 407,259 $30.25 1,298,153 No 4 S Indirect See Footnotes
Equity Swap Involved Form Type Code Nature of Ownership Explanation
No 4 S Indirect See Footnotes
Footnotes
  1. Represents 400,000 shares sold by Polaris Venture Partners IV, L.P. ("PVP IV") and 7,259 shares sold by Polaris Venture Partners Entrepreneurs' Fund IV, L.P. ("PVPE IV" and, together with PVP IV, the "Funds").
  2. The Reporting Person is a director of the Issuer and managing member of Polaris Venture Management Co. IV, L.L.C. ("PVM IV"), the general partner of each of PVP IV and PVPE IV. The amount of securities beneficially owned as reported in column 5 represents 1,273,175 shares, 22,983 shares, and 1,995 shares that are held directly by PVP IV, PVPE IV and PVM IV, respectively following the transactions reported in this Form 4. PVM IV disclaims beneficial ownership of the Funds' 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 in Footnote 3)
  3. Each of Jonathan A. Flint and the Reporting Person are the managing members of PVM IV and each of them disclaims beneficial ownership of the Funds' and PVM IV's 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.
  4. The initial Form 4 filed on August 19, 2015 by the Reporting Person inadvertently listed the incorrect number of shares beneficially owned following the reported transaction in column 5 and with regard to PMV IV in Footnote 2.