Item 1. Description of Registrants’ Securities to be Registered.
For a description of the securities to be registered hereunder, reference is made to the information under the headings ‘‘Summary Information – Q&A,’’ ‘‘Risk Factors’’ and ‘‘Description of the Certificates’’ on pages 2 through 11, 12 through 19 and 28 through 44, respectively, of the Registrants’ Prospectus and Pricing Supplement, Subject to Completion, dated May 24, 2007 (Registration Nos. 333-135867, 333-135867-07 and 333-135867-11), which information is hereby incorporated herein by reference and made part of this registration statement in its entirety. The description of the Principal-Protected Trust Certificates Linked to the Dow Jones Industrial AverageSM, the Dow Jones EURO STOXX 50 IndexSM, the Nikkei 225 Stock AverageSM and the S&P BRIC 40 Index® Due 2012 (the ‘‘Certificates’’) contained in the final Prospectus and Pricing Supplement to be filed pursuant to Rule 424(b), which will contain the final terms of the Certificates, is deemed to be incorporated herein by reference and made part of this registration statement in its entirety.
Item 2. Exhibits.
99 (A). Prospectus and Pricing Supplement describing the Certificates, Subject to Completion, dated May 24, 2007, incorporated by reference to the Registrants’ filing under Rule 424(b)(2) dated May 25, 2007.
99 (B). Certificate of Trust of Safety First Trust Series 2006-4, incorporated by reference to Exhibit 3(j) to the Registrants’ automatic shelf registration statement on Form S-3 filed on July 19, 2006 (Registration Nos. 333-135867, 333-135867-07 and 333-135867-11) (the ‘‘Registration Statement’’).
99 (C). Form of Amended and Restated Declaration of Trust, incorporated by reference to Exhibit 4(a) to the Registration Statement.
99 (D). Form of the Trust Certificates Guarantee Agreement, incorporated by reference to Exhibit 4(b) to the Registration Statement.
99 (E). Form of Certificate Representing the Certificates (included in Exhibit 99(C)).
2
SIGNATURE
Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, each registrant has duly caused this registration statement or amendment thereto to be signed on its behalf by the undersigned, thereunto duly authorized.
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 |  |  |  |  |  |  |
|  |  | Citigroup Inc. (Registrant) |
|  |  | By: |  |  | /s/ Charles E. Wainhouse |
|  |  | |  |  | Name: Charles E. Wainhouse Title: Assistant Treasurer |
|  |  | Citigroup Funding Inc. (Registrant) |
|  |  | By: |  |  | /s/ Geoffrey S. Richards |
|  |  | |  |  | Name: Geoffrey S. Richards Title: Vice President and Assistant Treasurer |
|  |  | Safety First Trust Series 2007-3 (formerly Safety First Trust Series 2006-4) (Registrant) |
Date: June 21, 2007 |  |  | By: |  |  | /s/ Geoffrey S. Richards |
|  |  | |  |  | Name: Geoffrey S. Richards Title: Regular Trustee |
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3
INDEX TO EXHIBITS
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 |  |  |  |
Exhibit No. |  |  | Exhibit |
99(A). |  |  | Prospectus and Pricing Supplement describing the Certificates, Subject to Completion, dated May 24, 2007, incorporated by reference to the Registrants’ filing under Rule 424(b)(2) dated May 25, 2007. |
99(B). |  |  | Certificate of Trust of Safety First Trust Series 2006-4, incorporated by reference to Exhibit 3(j) to the Registration Statement. |
99(C). |  |  | Form of Amended and Restated Declaration of Trust, incorporated by reference to Exhibit 4(a) to the Registration Statement. |
99(D). |  |  | Form of the Trust Certificates Guarantee Agreement, incorporated by reference to Exhibit 4(b) to the Registration Statement. |
99(E). |  |  | Form of Certificate Representing the Certificates (included in Exhibit 99(C)). |
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4