Filing Details

Accession Number:
0001179110-12-006526
Form Type:
4
Zero Holdings:
No
Publication Time:
2012-04-05 13:00:00
Reporting Period:
2012-04-03
Filing Date:
2012-04-05
Accepted Time:
2012-04-05 16:20:14
SEC Url:
Form 4 Filing
Issuer
Cik Name Symbol Sector (SIC) IRS No
1274792 Merrimack Pharmaceuticals Inc MACK Pharmaceutical Preparations (2834) 000000000
Insiders
Cik Name Reported Address Insider Title Director Officer Large Shareholder Other
1213100 Phd M Walter Lovenberg C/O Merrimack Pharmaceuticals, Inc.
One Kendall Square, Suite B7201
Cambridge MA 02139
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 2012-04-03 1,428 $7.00 71,428 No 4 P Direct
Common Stock Acquisiton 2012-04-03 7,143 $0.00 78,571 No 4 C Direct
Equity Swap Involved Form Type Code Nature of Ownership Explanation
No 4 P Direct
No 4 C Direct
Reported Derivative Transactions
Sec. Name Sec. Type Acquisiton - Disposition Date Amount Price Amount - 2 Price - 2
Common Stock Series D Convertible Preferred Stock Disposition 2012-04-03 7,143 $0.00 7,143 $0.00
Remaning Holdings Exercise Date Expiration Date Equity Swap Involved Transaction Form Type Transaction Code Nature of Ownership
0 No 4 C Direct
Footnotes
  1. Each share of Series D Convertible Preferred Stock automatically converted into one share of Common Stock upon the closing of the issuer's initial public offering and had no expiration date.