Form Type: 4

SEC EDGAR Link
Accession Number:0000899243-22-021331
Date:2022-06-06
Issuer: MERRIMACK PHARMACEUTICALS INC (MACK)
Original Submission Date:

Reporting Person:

NIELSEN ULRIK B.
C/O MERRIMACK PHARMACEUTICALS, INC.
ONE BROADWAY 14TH FLOOR CAMBRIDGE, MA 02142

Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
Title of SecurityTransaction Date2a. Deemed Execution Date Transaction CodeSharesAcquired or DisposedPrice per share 5. Amount of Securities Beneficially Owned Following Reported Transaction 6. Ownership Form Direct or IndirectNature of Indirect Ownership
Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, convertible securities
Title of Derivative Security Conversion or Exercise Price of Derivative Security Transaction Date Deemed Execution Date Transaction Code Number of Derivative Securities Acquired (A) or Disposed of (D) Date ExercisableExpiration Date Title and Amount of Securities Underlying Derivative Security Price of Derivative Security Number of derivative Securities Beneficially Owned Following Reported Transaction(s) Ownership Form: Direct (D) or Indirect (I) Nature of Indirect Beneficial Ownership
STOCK OPTION (RIGHT TO BUY) 5.2 2022-06-06 deemed execution date A 7,000 (a) 2032-06-05 common stock 7,000 $5.20 21,000 direct
Footnotes
IDfootnote
f1 this option vests as to 1/4th of the total number of shares on 7/1/22 and an additional 1/4th of the total number of shares at the end of each successive three month period thereafter until 4/1/23.

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