UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

                                                                       Date of Report (Date of earliest event reported)             December 22, 2006

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Citigroup Inc.

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(Exact name of registrant as specified in its charter)

                                  Delaware                                 1-9924                      52-1568099

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                              (State or other                          (Commission                 (IRS Employer

                               jurisdiction of                           File Number)               Identification No.)

                               incorporation)

399 Park Avenue, New York, New York 10043

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(Address of principal executive offices) (Zip Code)

(212) 559-1000

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(Registrant's telephone number, including area code)

    Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of

    the registrant under any of the following provisions:

    [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

    [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

    [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

    [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Citigroup Inc.

Current Report on Form 8-K

 Item 8.01 Other Events.

  Notices filed pursuant to Rule 135c under the Securities Act of 1933 relating to issuances by Citigroup Inc. made

 prior to 2001 pursuant to Regulation S under the Securities Act of 1933.

 Item 9.01 Financial Statements and Exhibits.

 (d) Exhibits.

 Exhibit Number

 99.1             Rule 135c Notice relating to Citigroup’s EUR 1,000,000,000 6.125% notes due October 2010.

99.2             Rule 135c Notice relating to Citigroup’s GBP 400,000,000 6.50% notes due August 2030.

99.3             Rule 135c Notice relating to Citigroup’s GBP 225,000,000 6.25% notes due September 2019.

SIGNATURE

    Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this

   report to be signed on its behalf by the undersigned hereunto duly authorized.

   Dated: December 22, 2006      CITIGROUP INC.

            By:/s/ Michael J. Tarpley

Name:Michael J. Tarpley

Title:Assistant Secretary

EXHIBIT INDEX

Exhibit Number

 99.1 Rule 135c Notice relating to Citigroup’s EUR 1,000,000,000 6.125% notes due October 2010.

 99.2 Rule 135c Notice relating to Citigroup’s GBP 400,000,000 6.50% notes due August 2030.

 99.3 Rule 135c Notice relating to Citigroup’s GBP 225,000,000 6.25% notes due September 2019.