FORM 4
[ X ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Valence Life Sciences GP II LLC 		2. Issuer Name and Ticker or Trading Symbol

Celator Pharmaceuticals Inc [ CPXX ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
_____ Officer (give title below)      __ X __ Other (specify below)
Member of a 10% Group
(Last)          (First)          (Middle)

C/O VALENCE LIFE SCIENCES LLC, 590 MADISON AVENUE, 21ST FLOOR 		3. Date of Earliest Transaction (MM/DD/YYYY)

7/12/2016
(Street)

NEW YORK, NY 10022
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   7/12/2016     U (5)    1039109   (1) D $30.25   0   I   See Footnote   (2)
Common Stock   7/12/2016     U    143986   (1) D $30.25   0   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
WARRANT   $3.58   7/12/2016     J   (4) (5)       314611      (3) 4/29/2020   COMMON STOCK   314611     (4) 0   I   Footnote   (2)
WARRANT   $3.58   7/12/2016     J   (4)       44740      (3) 4/29/2020   COMMON STOCK   44740     (4) 0   D    

Explanation of Responses:
( 1)  Represents shares of common stock that were tendered to Plex Merger Sub, Inc., a Delaware corporation ("Purchaser") and an indirect wholly owned subsidiary of Jazz Pharmaceuticals plc, a public limited company formed under the laws of Ireland ("Jazz"), pursuant to the Purchaser's offer to purchase all of the outstanding common shares of Celator Pharmaceuticals, Inc. (the "Issuer") at a purchase price of $30.25 per common share, net to the seller in cash, without interest (less any required withholding taxes), upon the terms and subject to the conditions set forth in the Offer to Purchase, dated June 10, 2016 (as amended or supplemented) and in the related Letter of Transmittal (as amended or supplemented, which together with the Offer to Purchase, the "Offer"). Such shares were purchased by Purchaser pursuant to the Offer on July 12, 2016.
( 2)  The reported securities are directly owned by Valence CDK SPV, L.P. ("CDK SPV"). Valence Life Sciences GP II, LLC ("GP II") is the sole general partner of CDK SPV. In his capacity as the sole manager of GP II, Eric Roberts shares voting and investment authority over the securities held by CDK SPV. GP II and Mr. Roberts may be deemed to beneficially own the securities held by CDK SPV. Mr. Roberts and GP II disclaim beneficial ownership of these securities except to the extent of their respective pecuniary interests therein.
( 3)  These warrants are currently exercisable.
( 4)  Pursuant to the Agreement and Plan of Merger dated as of May 27, 2016, among Jazz, Purchaser and the Issuer (as amended or supplemented from time to time) (the "Merger"), these warrants are being assumed by Jazz and represent the right to receive cash from Jazz in an amount equal to the difference between the exercise price per share of the warrants and $30.25, the purchase price per share of Issuer common stock in the Merger, multiplied by the number of underlying shares of common stock.
( 5)  This transaction has also been reported on the Form 4 filed by Scott D. Morenstein.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Valence Life Sciences GP II LLC
C/O VALENCE LIFE SCIENCES LLC
590 MADISON AVENUE, 21ST FLOOR
NEW YORK, NY 10022


Member of a 10% Group
Valence CDK SPV, L.P.
C/O VALENCE LIFE SCIENCES LLC
590 MADISON AVENUE, 21ST FLOOR
NEW YORK, NY 10022


Member of a 10% Group
Roberts Eric W
C/O VALENCE LIFE SCIENCES LLC
590 MADISON AVENUE, 21ST FLOOR
NEW YORK, NY 10022


Member of a 10% Group

Signatures
By: Valence Life Sciences GP II, LLC, By: /s/ Eric W. Roberts, Managing Member 7/12/2016
** Signature of Reporting Person Date

Valence CDK SPV, L.P., By: Valence Life Sciences GP II, LLC, its General Partner, By: /s/ Eric W. Roberts, Managing Member 7/12/2016
** Signature of Reporting Person Date

/s/ Eric W. Roberts 7/12/2016
** 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 4(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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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