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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1609809	Seres Therapeutics Inc.	MCRB	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1233684	N David Cook	C/O Seres Therapeutics, Inc. 215 First Street Cambridge MA 02142	Chief Scientific Officer & Evp	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2016-04-01	46,650	$25.74	183,023	No	4	S	Direct
Common Stock	Disposition	2016-04-01	6,350	$26.90	176,673	No	4	S	Direct
Common Stock	Disposition	2016-04-04	8,000	$28.00	168,673	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct

Footnotes

The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.
The price reported is a weighted average price. These shares were sold in multiple transactions at per share prices ranging from $25.27 to $26.21. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
The price reported is a weighted average price. These shares were sold in multiple transactions at per share prices ranging from $26.32 to $27.15. The Reporting Person undertakes to provide upon request to the SEC staff, the Issuer, or any stockholder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.