FORM 4
[ ] 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, Section 17(a) of the Public
Utility Holding Company Act of 1935 or Section 30(f) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

CADIAN CAPITAL MANAGEMENT, LLC 		2. Issuer Name and Ticker or Trading Symbol

MF Global Holdings Ltd. [ MF ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

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

461 FIFTH AVENUE, 24TH FLOOR 		3. Date of Earliest Transaction (MM/DD/YYYY)

10/27/2011
(Street)

NEW YORK, NY 10017
(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   10/27/2011     S    500000   D $1.41   20342754   I   See Footnote   (1)
Common Stock   10/27/2011     S    166300   D $1.44   20176424   I   See Footnote   (1)
Common Stock   10/27/2011     S    250000   D $1.51   19926424   I   See Footnote   (1)
Common Stock   10/27/2011     S    2000000   D $1.43   17926424   I   See Footnote   (1)
Common Stock   10/27/2011     S    250000   D $1.46   17676424   I   See Footnote   (1)
Common Stock   10/28/2011     S    1798124   D $1.28   15878300   I   See Footnote   (1)
Common Stock   10/28/2011     S    2000000   D $1.31   13878300   I   See Footnote   (1)
Common Stock   10/28/2011     S    750000   D $1.06   13128300   I   See Footnote   (1)

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
3.375% Convertible Senior Notes due 2018   $9.9   10/27/2011     P      2000000       10/1/2011   8/1/2018   Common Stock   202066   $61   3000000   I   See Footnote   (1)

Explanation of Responses:
( 1)  These securities are held in the accounts of several investment partnerships and investment funds (collectively, the "Investment Vehicles") for which Cadian Capital Management LLC ("Cadian") serves as investment manager. Eric Bannasch is the managing member of Cadian. Cadian and Mr. Bannasch may be deemed to beneficially own the securities held by the Investment Vehicles by virtue of Cadian's position as investment manager of the Investment Vehicles and Mr. Bannasch's status as the managing member of Cadian.

Remarks:
(+) Each of the Reporting Person and the joint filer (individually, each a "Reporting Person" and collectively, the "Reporting Persons") disclaims beneficial ownership of the reported securities except to the extent of his or its pecuniary interest therein. The Reporting Persons affirmatively disclaim being a "group" for purposes of Section 16 of the Securities Exchange Act of 1934, as amended.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
CADIAN CAPITAL MANAGEMENT, LLC
461 FIFTH AVENUE
24TH FLOOR
NEW YORK, NY 10017
X

Bannasch Eric
C/O CADIAN CAPITAL MANAGEMENT, LLC
461 FIFTH AVENUE, 24TH FLOOR
NEW YORK, NY 10017
X


Signatures
Cadian Capital Management, LLC(+), By: /s/ Eric Bannasch 10/31/2011
** Signature of Reporting Person Date

/s/ Eric Bannasch(+) 10/31/2011
** 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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