Exhibit 31.2
CERTIFICATIONS
I, Kimi Iguchi, certify that:
| 1. | I have reviewed this quarterly report on Form 10-Q/A, Amendment No. 1, of Sage Therapeutics, 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: October 30, 2015 | /s/ Kimi Iguchi | |||
| Kimi Iguchi | ||||
Chief Financial Officer (Principal Financial and Accounting Officer) | ||||
