Exhibit 31.1
CERTIFICATIONS
I, Troy Cox, certify that:
| 1. |   I have reviewed this Amendment No. 1 to Quarterly Report on Form 10-Q of Foundation Medicine, 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: September 18, 2018
|   /s/ Troy Cox  | 
| Troy Cox | 
|   President and Chief Executive Officer (Principal Executive Officer)  |