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Filing Details

Accession Number:: 0000899243-19-017640
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2019-06-20 16:17:26
Reporting Period:: 2019-06-18

Accepted Time:: 2019-06-20 16:17:26
SEC Url:: Form 4 Filing

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
1222012	Noubar Afeyan	55 Cambridge Parkway Cambridge MA 02142		Yes	No	Yes	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2019-06-18	4,444,444	$2.25	4,444,444	No	4	P	Indirect	See Footnote
Common Stock	Acquisiton	2019-06-18	4,444,444	$2.25	4,444,444	No	4	P	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See Footnote
No	4	P	Indirect	See Footnote

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	8,022,420	Indirect	See Footnote
Common Stock	1,925,462	Indirect	See Footnote
Common Stock	2,734,994	Indirect	See Footnote
Common Stock	15,141	Direct

Footnotes

On June 18, 2019, Flagship Pioneering Fund VI, L.P. ("Flagship Fund VI") acquired 4,444,444 shares pursuant to an underwritten public offering of common stock by the issuer (the "Offering").
The shares are held by Flagship Fund VI. Flagship Pioneering Fund VI General Partner LLC ("Fund VI GP") is the general partner of Flagship Fund VI. Flagship Pioneering, Inc. ("Flagship Pioneering") is the manager of Fund VI GP. Noubar B. Afeyan Ph.D. is the CEO and sole shareholder of Flagship Pioneering and may be deemed to have sole voting and investment power with respect to all shares held by Flagship Fund VI. Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.
On June 18, 2019, Nutritional Health LTP Fund, L.P. ("Nutritional LTP") acquired 4,444,444 shares pursuant to the Offering.
The shares are held by Nutritional LTP. Nutritional Health LTP Fund General Partner LLC ("Nutritional LTP GP") is the general partner of Nutritional LTP. Noubar B. Afeyan Ph.D. is the sole member and manager of Nutritional LTP GP and may be deemed to have sole voting and investment power with respect to all shares held by Nutritional LTP. Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.
The shares are held directly by Flagship Ventures Fund IV, L.P. ("Flagship Fund IV"). Flagship Ventures Fund IV General Partner LLC ("Flagship Fund IV GP") is the general partner of Flagship Fund IV. Noubar B. Afeyan, Ph.D. and Edwin M. Kania, Jr. are the managers of Flagship Fund IV GP and each of these managers may be deemed to share voting and investment power with respect to all shares held by Flagship Fund IV. While Mr. Kania is retired from Flagship Pioneering, Inc., he continues to serve as a manager of Flagship Fund IV GP. Dr. Afeyan disclaims beneficial ownership of the shares except to the extent of his or its pecuniary interest therein.
The shares are held directly by Flagship Ventures Fund IV-Rx, L.P. ("Flagship IV-Rx"). Flagship Fund IV GP is the general partner of Flagship IV-Rx. Dr. Afeyan disclaims beneficial ownership of the shares except to the extent of his or its pecuniary interest therein.
The shares are held directly by Flagship VentureLabs IV LLC ("VentureLabs IV"). Flagship Fund IV is a member of VentureLabs IV and also serves as its manager. Dr. Afeyan disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.