SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Nestle Health Science US Holdings, Inc. (Last) (First) (Middle) C/O NESTLE USA, INC. 383 MAIN AVE., 5TH FLOOR (Street) NORWALK CT 06851 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 06/25/2015	3. Issuer Name and Ticker or Trading Symbol Seres Therapeutics, Inc. [ MCRB ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	1,944,444	I	See Footnote(1)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series D Convertible Preferred Stock	(2)	(2)	Common Stock	3,611,111	(2)	I	See Footnote(1)

1. Name and Address of Reporting Person* Nestle Health Science US Holdings, Inc. (Last) (First) (Middle) C/O NESTLE USA, INC. 383 MAIN AVE., 5TH FLOOR (Street) NORWALK CT 06851 (City) (State) (Zip)

1. Name and Address of Reporting Person* NESTLE SA (Last) (First) (Middle) AVE NESTLE 55, CH-1800 (Street) VEVEY V8 (City) (State) (Zip)

1. Name and Address of Reporting Person* NIMCO US, Inc. (Last) (First) (Middle) 383 MAIN AVE., 5TH FLOOR (Street) NORWALK CT 06851 (City) (State) (Zip)

Explanation of Responses:

1. Held by Nestle Health Science US Holdings, Inc. Nestle Health Science US Holdings, Inc. is a wholly owned subsidiary of NIMCO US, Inc., which is a wholly owned subsidiary of Nestle S.A., a publically traded company. Each of these entities may be deemed to share voting and investment power with respect to all shares held by Nestle Health Science US Holdings, Inc. Each of the filing persons disclaims beneficial ownership of such shares except to the extent of its pecuniary interest therein.

2. Each class of Series D Convertible Preferred Stock is convertible into Common Stock on a one-for-one basis and has no expiration date. Each share of Series D Convertible Preferred Stock will convert into Common Stock upon the listing of the issuer's securities on The NASDAQ Global Select Market.

Remarks:

	NESTLE HEALTH SCIENCE US HOLDINGS, INC., By: /s/ James Pepin, Name: James Pepin, Title: President	06/25/2015
	NIMCO US, INC., By: /s/ Yun Au, Name: Yun Au, Title: Chief Legal Officer	06/25/2015
	NESTLE S.A., By: /s/ David P. Frick, Name: David P. Frick, Title: Secretary to the Board of Directors	06/25/2015
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
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