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Filing Details

Accession Number:: 0001012975-16-001264
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2016-05-27 18:43:31
Reporting Period:: 2016-05-25

Filing Date:: 2016-05-27
Accepted Time:: 2016-05-27 18:43:31
SEC Url:: Form 4 Filing

Issuer

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

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1222012	Noubar Afeyan	1 Memorial Drive, 7Th Floor Cambridge MA 02142	Yes	No	Yes	No
1255927	Jr M Edwin Kania	1 Memorial Drive, 7Th Floor Cambridge MA 02142	No	No	Yes	No
1503559	Flagship Ventures Fund Iv, L.p.	1 Memorial Drive, 7Th Floor Cambridge MA 02142	No	No	Yes	No
1508051	Flagship Ventures Fund Iv General Partner Llc	1 Memorial Drive, 7Th Floor Cambridge MA 02142	No	No	Yes	No
1508052	Flagship Ventures Fund 2007, L.p.	1 Memorial Drive, 7Th Floor Cambridge MA 02142	No	No	Yes	No
1508053	Flagship Ventures 2007 General Partner Llc	1 Memorial Drive, 7Th Floor Cambridge MA 02142	No	No	Yes	No
1590973	Flagship Ventures Fund Iv-Rx, L.p.	1 Memorial Drive, 7Th Floor Cambridge MA 02142	No	No	Yes	No
1642578	Flagship Venturelabs Iv, Llc	1 Memorial Drive, 7Th Floor Cambridge MA 02142	No	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, $0.001 Par Value	Disposition	2016-05-25	320,562	$27.60	2,734,994	No	4	S	Indirect	See footnote
Common Stock, $0.001 Par Value	Disposition	2016-05-25	80,141	$27.60	1,925,462	No	4	S	Indirect	See footnote
Common Stock, $0.001 Par Value	Disposition	2016-05-25	599,297	$27.60	0	No	4	S	Indirect	See footnote
Common Stock, $0.001 Par Value	Disposition	2016-05-25	800,000	$0.00	8,022,420	No	4	J	Indirect	See footnote
Common Stock, $0.001 Par Value	Disposition	2016-05-25	200,000	$0.00	1,925,462	No	4	J	Indirect	See footnote
Common Stock, $0.001 Par Value	Acquisiton	2016-05-25	33,507	$0.00	33,514	No	4	J	Indirect	See footnote
Common Stock, $0.001 Par Value	Acquisiton	2016-05-25	7	$0.00	33,514	No	4	J	Indirect	See footnote
Common Stock, $0.001 Par Value	Disposition	2016-05-25	33,514	$0.00	0	No	4	J	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See footnote
No	4	S	Indirect	See footnote
No	4	S	Indirect	See footnote
No	4	J	Indirect	See footnote
No	4	J	Indirect	See footnote
No	4	J	Indirect	See footnote
No	4	J	Indirect	See footnote
No	4	J	Indirect	See footnote

Footnotes

Held by Flagship VentureLabs IV LLC ("Flagship VentureLabs"). Flagship Ventures Fund IV, L.P. ("Flagship Fund IV") is a member of Flagship VentureLabs and also serves as its manager. 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. Each of these individuals and entities may be deemed to share voting and investment power with respect to all shares held by Flagship VentureLabs. Each of the filing persons disclaims beneficial ownership of such shares except to the extent of his or its pecuniary interest therein.
Held 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 and Mr. Kania 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 IV-Rx. Each of the filing persons disclaims beneficial ownership of the shares except to the extent of his or its pecuniary interest therein.
Held by Flagship Ventures Fund 2007, L.P. ("Flagship 2007"). Flagship Ventures 2007 General Partner LLC ("Flagship 2007 LLC") is the general partner of Flagship 2007. Dr. Afeyan and Mr. Kania are the managers of Flagship 2007 LLC and each of these managers may be deemed to share voting and investment power with respect to all shares held by Flagship 2007. Each of the filing persons disclaims beneficial ownership of the shares except to the extent of his or its pecuniary interest therein.
Distribution of shares in kind by Flagship Fund IV on a pro rata basis to its partners.
The shares are directly held by Flagship Fund IV. Flagship Fund IV GP is the general partner of Flagship Fund IV. Dr. Afeyan and Mr. Kania 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. Each of the filing persons disclaims beneficial ownership of the shares except to the extent of his or its pecuniary interest therein.
Distribution of shares in kind by Flagship IV-Rx on a pro rata basis to its partners.
The shares are directly held by Flagship IV-Rx. Flagship Fund IV GP is the general partner of Flagship IV-Rx. Dr. Afeyan and Mr. Kania 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-Rx. Each of the filing persons disclaims beneficial ownership of the shares except to the extent of his or its pecuniary interest therein.
Flagship Fund IV GP received shares distributed in kind by Flagship Fund IV on a pro rata basis to its partners.
Flagship Fund IV GP received shares distributed in kind by Flagship IV-Rx on a pro rata basis to its partners.
Distribution of shares in kind by Flagship Fund IV GP on a pro rata basis to its members.
The shares are directly held by Flagship Fund IV GP. As such, each of Dr. Afeyan and Mr. Kania exercises shared voting and investment power over the shares held by Flagship Fund IV GP. Each of the filing persons disclaims beneficial ownership of the shares except to the extent of his or its pecuniary interest therein.