| CUSIP No.81750R102 | 13G | Page 16 of 17 |
EXHIBIT 1
AGREEMENT
Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of shares of Common Stock of Seres Therapeutics Inc.
EXECUTED this 16th day of February, 2016.
FLAGSHIP VENTURES 2007 FUND, L.P.
| By: | Flagship Ventures 2007 General Partner LLC | |||
General Partner | ||||
| By: | /s/ Noubar B. Afeyan, Ph.D. | |||
| Noubar B. Afeyan, Ph.D. | ||||
| Manager | ||||
| FLAGSHIP VENTURES 2007 GENERAL PARTNER LLC | ||||
| By: | /s/ Noubar B. Afeyan, Ph.D. | |||
| Noubar B. Afeyan, Ph.D. | ||||
| Manager | ||||
| FLAGSHIP VENTURES FUND IV, L.P. | ||||
| By: | Flagship Ventures Fund IV General Partner LLC General Partner | |||
| By: | /s/ Noubar B. Afeyan, Ph.D. | |||
| Noubar B. Afeyan, Ph.D. | ||||
| Manager | ||||
| FLAGSHIP VENTURES FUND IV-Rx, L.P. | ||||
| By: | Flagship Ventures Fund IV General Partner LLC General Partner | |||
| By: | /s/ Noubar B. Afeyan, Ph.D. | |||
| Noubar B. Afeyan, Ph.D. | ||||
| Manager | ||||
| CUSIP No.81750R102 | 13G | Page17 of 17 |
FLAGSHIP VENTURELABS IV, LLC
| By: | Flagship Ventures Fund IV, L.P. | |||
Manager | ||||
| By: | Flagship Ventures Fund IV General Partner LLC | |||
| General Partner | ||||
| By: /s/ Noubar B. Afeyan, Ph.D. | ||||
| Noubar B. Afeyan, Ph.D. | ||||
| Manager | ||||
| FLAGSHIP VENTURES FUND IV GENERAL PARTNER LLC | ||||
| By: | /s/ Noubar B. Afeyan, Ph.D. | |||
| Noubar B. Afeyan, Ph.D. | ||||
| Manager | ||||
/s/ Noubar B. Afeyan, Ph.D. | ||||
| Noubar B. Afeyan, Ph.D. | ||||
/s/ Edwin M. Kania, Jr. | ||||
| Edwin M. Kania, Jr. | ||||
