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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1609809	Seres Therapeutics Inc.	MCRB	Pharmaceutical Preparations (2834)	274326290

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1829360	S. David Ege	C/O Seres Therapeutics, Inc. 200 Sidney Street Cambridge MA 02139	See Remarks	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	Explanation
Common Stock	Acquisiton	2022-10-27	20,000	$0.00	51,746	No	4	A	Direct
Common Stock	Disposition	2022-10-31	5,012	$7.93	46,734	No	4	S	Direct

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

Footnotes

On May 3, 2021, the reporting person was granted an award of 40,000 restricted stock units, which vest in the form of shares of the Issuer's common stock in two equal installments upon the satisfaction of certain performance criteria. On October 27, 2022, the Issuer's Board of Directors determined that the performance criteria for the first installment were met, resulting in the vesting and settlement of the award as to 20,000 shares.
The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 instruction solely with the intent to cover taxes in connection with the vesting of the restricted stock units.