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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person *   Celgene Switzerland LLC 2. Date of Event Requiring Statement (Month/Day/Year) 01/26/2017 3. Issuer Name and Ticker or Trading Symbol Jounce Therapeutics, Inc. [JNCE] (Last) (First) (Middle) AON HOUSE, 30 WOODBOURNE AVENUE 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 Original Filed(Month/Day/Year) (Street) PEMBROKE, D0 HM 08 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) 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)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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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 of Derivative Security: 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 B-1 Preferred Stock	  (1)	  (1)	Common Stock	2,831,463	$ (1)	D (2)	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Celgene Switzerland LLC AON HOUSE 30 WOODBOURNE AVENUE PEMBROKE, D0 HM 08	Â	  X	Â	Â
CELGENE CORP /DE/ 86 MORRIS AVENUE SUMMIT, NJ 07901	Â	  X	Â	Â

Signatures

/s/Kevin Mello, Manager, Celgene Switzerland, LLC		01/26/2017
**Signature of Reporting Person		Date
/s/ Peter N. Kellogg, Executive Vice President and Chief Financial Officer, Celgene Corporation		01/26/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Each share of Series B-1 Preferred Stock is convertible into 0.271 share of Common Stock without payment of further consideration and will automatically convert into 0.271 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. The shares have no expiration date.
(2)	These shares are owned directly by Celgene Switzerland LLC, a wholly-owned subsidiary of Celgene Corporation ("Celgene"), and Celgene has the power to vote, acquire, hold and dispose of all shares. Celgene disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

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