Exhibit 31.4
CERTIFICATIONS
I, Jean M. Franchi, certify that:
1. I have reviewed this Amendment No. 1 to the Annual Report on Form10-K of Merrimack Pharmaceuticals, Inc.; and
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
| Date: April 30, 2019 | /s/ Jean M. Franchi | |||
| Jean M. Franchi | ||||
| Chief Financial Officer and Treasurer | ||||
| (Principal Financial Officer) |
