Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
  CELGENE CORP /DE/
2. Date of Event Requiring Statement (Month/Day/Year)
03/05/2018
3. Issuer Name and Ticker or Trading Symbol
Juno Therapeutics, Inc. [JUNO]
(Last)
(First)
(Middle)
86 MORRIS 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)

SUMMIT, NJ 07901
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)
Common Stock 11,109,160
I
See Footnote (1)
Common Stock 88,118,707
I
See Footnote (2)

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

Reporting Owners

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

Signatures

/s/ Peter N. Kellogg, Executive Vice President and Chief Financial Officer, Celgene Corporation 03/06/2018
**Signature of Reporting Person Date

/s/ Kevin Mello, Manager, Celgene Switzerland, LLC 03/06/2018
**Signature of Reporting Person Date

/s/ Peter N. Kellogg, Chief Financial Officer, Blue Magpie Corporation 03/06/2018
**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) These shares are owned directly by Celgene Switzerland LLC, a wholly-owned subsidiary of Celgene Corporation ("Celgene").
(2) These shares are owned directly by Blue Magpie Corporation, a wholly-owned subsidiary of Celgene.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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