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Filing Details

Accession Number:
0000899243-16-035262
Form Type:
4
Zero Holdings:
No
Publication Time:
2016-12-09 18:22:08
Reporting Period:
2016-12-07
Filing Date:
2016-12-09
Accepted Time:
2016-12-09 18:22:08
SEC Url:
Form 4 Filing
Issuer
Cik Name Symbol Sector (SIC) IRS No
1280600 Acceleron Pharma Inc XLRN () MA
Insiders
Cik Name Reported Address Insider Title Director Officer Large Shareholder Other
1117003 Terrance Mcguire One Marina Park Drive, Suite 1100
Boston MA 02210
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 Acquisiton 2016-12-07 180,518 $5.88 778,671 No 4 X Indirect See Footnote
Common Stock Disposition 2016-12-08 34,285 $30.96 744,386 No 4 S Indirect See Footnote
Common Stock Acquisiton 2016-12-07 3,384 $5.88 747,770 No 4 X Indirect See Footnote
Common Stock Disposition 2016-12-08 643 $30.96 747,127 No 4 S Indirect See Footnote
Equity Swap Involved Form Type Code Nature of Ownership Explanation
No 4 X Indirect See Footnote
No 4 S Indirect See Footnote
No 4 X Indirect See Footnote
No 4 S Indirect See Footnote
Reported Derivative Transactions
Sec. Name Sec. Type Acquisiton - Disposition Date Amount Price Amount - 2 Price - 2
Common Stock Warrant (Right to Buy) Disposition 2016-12-07 180,518 $0.00 180,518 $5.88
Common Stock Warrant (Right to Buy) Disposition 2016-12-07 3,384 $0.00 3,384 $5.88
Remaning Holdings Exercise Date Expiration Date Equity Swap Involved Transaction Form Type Transaction Code Nature of Ownership
0 2010-06-10 2020-06-10 No 4 X Indirect
0 2010-06-10 2020-06-10 No 4 X Indirect
Reported Non-Derivative Holdings
Sec. Name Remaning Holdings Nature of Ownership Explanation
Common Stock 1,624 Direct
Footnotes
  1. Represents 766,574 shares, 10,102 shares, and 1,995 shares directly owned by Polaris Venture Partners IV, L.P. ("PVP IV"), Polaris Venture Partners Entrepreneurs' Fund IV, L.P. ("PVPE IV") and Polaris Venture Management IV, L.L.C. ("PVM IV"), respectively.
  2. The Reporting Person is a managing member of PVM IV, the general partner of each of PVP IV and PVPE IV. The Reporting Person 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.
  3. On December 7, 2016, the PVP IV exercised a warrant to purchase 180,518 share of the Issuer's Common Stock for $5.88 per share. PVP IV paid the exercise price on a cashless basis, resulting in the Issuer withholding 34,285 shares of the Issuer's shares of common stock subject to the warrant to pay the exercise price and issuing PVP IV the remaining 146,233 shares of the Issuer's common stock. The Issuer also paid $17.76 to PVP IV in lieu of a fractional share.
  4. Represents 732,289 shares, 10,102 shares, and 1,995 shares directly owned by PVP IV, PVPE IV and PVM IV, respectively.
  5. Represents 732,289 shares, 13,486 shares, and 1,995 shares directly owned by PVP IV, PVPE IV and PVM IV, respectively.
  6. On December 7, 2016, the PVPE IV exercised a warrant to purchase 3,384 share of the Issuer's Common Stock for $5.88 per share. PVPE IV paid the exercise price on a cashless basis, resulting in the Issuer withholding 643 shares of the Issuer's shares of common stock subject to the warrant to pay the exercise price and issuing PVPE IV the remaining 2,741 shares of the Issuer's common stock. The Issuer also paid $9.36 to PVPE IV in lieu of a fractional share.
  7. Represents 732,289 shares, 12,843 shares, and 1,995 shares directly owned by PVP IV, PVPE IV and PVM IV, respectively.