Filed pursuant to Rule 424(b)(2)
Registration Nos. 333-132370 and 333-132370-01
CALCULATION OF REGISTRATION FEE
                 
    Aggregate   Amount of
Class of securities offered   offering price   registration fee
Medium-Term Senior Notes, Series D
  $ 750,000,000.00     $ 29,475.00 (1)
 
(1)   The filing fee of $29,475.00 is calculated in accordance with Rule 457(r) of the Securities Act of 1933. The registration fee of $29,475.00 due for this offering is offset against the $135,580.30 remaining of the fees most recently paid on January 26, 2009, of which $106,105.30 remains available for future registration fees. No additional registration fee has been paid with respect to this offering.
Pricing Supplement No. MTNDD369 — Dated January 30, 2009
(To Prospectus Supplement Dated April 13, 2006 and
Prospectus Dated March 10, 2006)
CITIGROUP FUNDING INC.
FDIC-Guaranteed Medium-Term Senior Notes, Series D
Payments Due from Citigroup Funding Inc.
Fully and Unconditionally Guaranteed by Citigroup Inc.
This debt is guaranteed under the Federal Deposit Insurance Corporation’s Temporary Liquidity Guarantee Program and is backed by the full faith and credit of the United States. The details of the FDIC guarantee are provided in the FDIC’s regulations, 12 C.F.R. Part 370, and at the FDIC’s website, www.fdic.gov/tlgp. The expiration date of the FDIC’s guarantee is the earlier of the maturity date of the debt or June 30, 2012.
Description of Notes:
     
Principal Amount or Face Amount:
 
$750,000,000. Upon settlement, the Notes will form part of the same series as, and will be fungible with, Citigroup Funding Inc.’s outstanding FDIC-Guaranteed Medium Term Notes due 2010 issued on January 30, 2009, and the aggregate principal amount of this series of Notes will be $3,000,000,000.
 
   
Issue Price:
  100.0678%    
 
   
Proceeds to Company on original issuance:
  $749,703,747.92 (including accrued interest but before expenses)
 
   
Commission:
  $937,500    
 
   
Agents’ commitment on original issuance:
   
 
   
      Citigroup Global Markets Inc.
  $735,000,000    
      Deutsche Bank Securities Inc.
  $    7,500,000    
      Greenwich Capital Markets, Inc.
  $    7,500,000    
 
   
Citigroup Global Markets Inc.’s capacity on original issuance: If as Principal
  As Principal   
 
   
   o The Registered Notes are being offered at varying prices related to prevailing market prices at the time of resale.
 
   
   þ The Registered Notes are being offered at a fixed initial public offering price 100% of Principal Amount or Face Amount.

PS-1

 

     
Form of Note:
  Global
 
   
Original Issue Date:
  February 4, 2009
 
   
Stated Maturity:
  July 30, 2010
 
   
Specified Currency:
  N/A
(If other than U.S. Dollars)
   
 
   
Authorized Denominations:
(If other than as set forth
in the Prospectus Supplement)
  Minimum USD 1,000 and minimum increments of USD 1,000 thereafter
 
   
Interest Payment Dates:
  Quarterly on the 30 th of each January, April, July, and October thereafter until maturity, with adjustment for period end dates on a modified following New York Business Day Convention
 
   
First Interest Payment Date:
  April 30, 2009
 
   
Accrue to Pay:
  Yes
 
   
Indexed Principal Note:
  N/A
 
   
Type of Interest on Note:
  Floating
 
   
Interest Rate (Fixed Rate Notes):
  N/A
 
   
Base Rate (Floating Rate Notes):
  LIBOR
 
   
Calculation Agent:
  Citibank, N.A.
 
   
Computation of Interest:
   
(If other than as set forth
in the Prospectus Supplement):
  N/A
 
   
Interest Reset Dates:
  Quarterly on each Interest Payment Date
 
   
Rate Determination Dates:
(If other than as set forth
in the Prospectus Supplement):
  The second London business day prior to each Interest Reset Date
 
   
Index:
  Three-month USD-BBA-LIBOR Reuters LIBOR01

PS-2