Ownership Submission
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

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 *
RUBIN ROBERT E
  2. Issuer Name and Ticker or Trading Symbol
CITIGROUP INC [C]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Office of the Chairman
(Last)
(First)
(Middle)
C/O CITIGROUP INC. CORPORATE LAW DEPT., 425 PARK AVENUE, 2ND FLOOR
3. Date of Earliest Transaction (Month/Day/Year)
06/19/2006
(Street)

NEW YORK, NY 10043
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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 06/19/2006   M   234,353 A $ 33.4447 841,813.9 D  
Common Stock 06/19/2006   F   162,073 D $ 48.36 679,740.9 D  
Common Stock 06/19/2006   F   34,551 D $ 48.36 645,189.9 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction 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
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(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
Employee Stock Options (Right to Buy) $ 33.4447 06/19/2006   M     234,353 10/26/2004 10/26/2009 Common Stock 234,353 $ 0 1,717,213 D  
Employee Stock Options (Right to Buy) $ 48.36 06/19/2006   A   196,624   12/19/2006 10/26/2009 Common Stock 196,624 $ 0 196,624 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
RUBIN ROBERT E
C/O CITIGROUP INC. CORPORATE LAW DEPT.
425 PARK AVENUE, 2ND FLOOR
NEW YORK, NY 10043
  X     Office of the Chairman  

Signatures

 Robert E. Rubin by Glenn S. Gray, Attorney-in-Fact   06/21/2006
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
 
Remarks:
In total (including the employee stock options reported in Table II, above), the Reporting Person directly beneficially owns

4,641,283 employee stock options representing rights to purchase an equivalent number of shares of common stock, which have

various exercise prices, exercise dates and expiration dates.

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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