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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1. Name and Address of Reporting Person * DRUSKIN ROBERT   2. Issuer Name and Ticker or Trading Symbol CITIGROUP INC [C] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President & CEO, CIB (Last) (First) (Middle) C/O CITIGROUP INC. CORPORATE LAW DEPT., 425 PARK AVENUE, 2ND FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 05/01/2006 (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 05/01/2006   M   18,584 A $ 41.4452 1,111,754.7 D   Common Stock 05/01/2006   F   15,420 D $ 49.95 1,096,334.7 D   Common Stock 05/01/2006   F   1,467 D $ 49.95 1,094,867.7 D   Common Stock               6,521.8 I By 401(k) Plan Common Stock               25,000 I By GRAT

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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)

$ 41.4452

05/01/2006

M

18,584

07/18/2005

04/18/2010

Common Stock

18,584

$ 0

0

D

Employee Stock Options (Right to Buy)

$ 49.95

05/01/2006

A

16,806

11/01/2006

04/18/2010

Common Stock

16,806

$ 0

16,806

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
DRUSKIN ROBERT C/O CITIGROUP INC. CORPORATE LAW DEPT. 425 PARK AVENUE, 2ND FLOOR NEW YORK, NY 10043			President & CEO, CIB

Signatures

Robert Druskin by Glenn S. Gray, Attorney-in-Fact		05/03/2006
**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 715,356 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.

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