EXHIBIT 31.2
CERTIFICATION
I, Michael P. Mason, certify that:
| 1) | I have reviewed this Amendment No. 1 to Quarterly Report on Form 10-Q/A of Alnylam 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: July 26, 2013 | /s/ Michael P. Mason | |||||
| Michael P. Mason | ||||||
| Vice President of Finance and Treasurer |
