Exhibit 31.4
CERTIFICATIONS
I, Yasir B. Al-Wakeel, BM BCh, 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: May 1, 2017 | /s/ Yasir B. Al-Wakeel, BM BCh | |
| Yasir B. Al-Wakeel, BM BCh | ||
| Chief Financial Officer and Head of Corporate Development | ||
| (Principal Financial Officer) |
