Sec Form 4 Filing - THOMSON TODD S @ CITIGROUP INC - 2006-12-19

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 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 THOMSON TODD S 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) Chair/CEO Global Wealth Mgt. (Last) (First) (Middle) C/O CITIGROUP INC. CORPORATE LAW DEPT., 425 PARK AVENUE, 2ND FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 12/19/2006 (Street) NEW YORK, NY10043 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 12/19/2006 M 20,195 A $ 45.44 500,867.9 D Common Stock 12/19/2006 F 16,552 D $ 55.44 484,315.9 D Common Stock 12/19/2006 F 1,596 D $ 55.44 482,719.9 D Common Stock 12/19/2006 M 28,131 A $ 45.73 510,850.9 D Common Stock 12/19/2006 F 23,204 D $ 55.44 487,646.9 D Common Stock 12/19/2006 F 2,159 D $ 55.44 485,487.9 D Common Stock 12/19/2006 M 2,532 A $ 45.73 488,019.9 D Common Stock 12/19/2006 F 2,088 D $ 55.44 485,931.9 D Common Stock 12/19/2006 F 195 D $ 55.44 485,736.9 D Common Stock 12/19/2006 M 28,460 A $ 45.73 514,196.9 D Common Stock 12/19/2006 F 23,475 D $ 55.44 490,721.9 D Common Stock 12/19/2006 F 2,184 D $ 55.44 488,537.9 D Common Stock 12/19/2006 M 9,184 A $ 45.73 497,721.9 D Common Stock 12/19/2006 F 7,575 D $ 55.44 490,146.9 D Common Stock 12/19/2006 F 706 D $ 55.44 489,440.9 D Common Stock 1,937.8 I By 401(k)

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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) $ 45.44 12/19/2006 M 20,195 01/30/2004 07/22/2008 Common Stock 20,195 $ 0 0 D Employee Stock Options (Right to Buy) $ 45.73 12/19/2006 M 28,131 01/28/2004 07/22/2008 Common Stock 28,131 $ 0 0 D Employee Stock Options (Right to Buy) $ 45.73 12/19/2006 M 2,532 01/28/2004 11/02/2008 Common Stock 2,532 $ 0 0 D Employee Stock Options (Right to Buy) $ 45.73 12/19/2006 M 28,460 01/28/2004 11/02/2008 Com mon Stock 28,460 $ 0 0 D Employee Stock Options (Right to Buy) $ 45.73 12/19/2006 M 9,184 01/28/2004 11/02/2008 Common Stock 9,184 $ 0 0 D Employee Stock Options (Right to Buy) $ 55.44 12/19/2006 A 18,148 06/19/2007 07/22/2008 Common Stock 18,148 $ 0 18,148 D Employee Stock Options (Right to Buy) $ 55.44 12/19/2006 A 2,283 06/19/2007 11/02/2008 Common Stock 2,283 $ 0 2,283 D Employee Stock Options (Right to Buy) $ 55.44 12/19/2006 A 25,659 06/19/2007 11/02/2008 Common Stock 25,659 $ 0 25,659 D Employee Stock Options (Right to Buy) $ 55.44 12/19/2006 A 8,281 06/19/2007 11/02/2008 Common Stock 8,281 $ 0 8,281 D Employee Stock Options (Right to Buy) $ 55.44 12/19/2006 A 25,363 06/19/2007 07/22/2008 Common Stock 25,363 $ 0 25,363 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other THOMSON TODD S C/O CITIGROUP INC. CORPORATE LAW DEPT. 425 PARK AVENUE, 2ND FLOOR NEW YORK, NY10043 Chair/CEO Global Wealth Mgt. Signatures Todd S. Thomson by Shelley J. Dropkin, Attorney-in-Fact 12/21/2006 Signature of Reporting Person Date

Explanation of Responses:

Remarks: In total (including the employee stock options reported in Table II, above), the Reporting Person directly beneficially owns 665,784 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.

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).

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