Exhibit 10.18.4

Michael L. Corbat Citigroup Inc. Chief Executive Officer 399 Park Avenue New
York, NY 10022 [exhibitsx1x1.jpg]

 

December 14, 2012

Dr. Robert L. Joss
84 Euclid Avenue
Atherton, CA 94027

Re: Consulting Agreement Renewal

Dear Bob:

This letter sets forth our mutual understanding that the Consulting Agreement
dated April 5, 2010, as amended as of October 28, 2010 and January 1, 2012,
between you and Citigroup Inc. (the “Consulting Agreement”) shall continue in
effect on the same terms and conditions from January 1, 2013 through December
31, 2013 with one additional change. In a modification of paragraph 1 of the
Consulting Agreement, you agree to provide consulting advice to Citi from time
to time on projects as agreed by you and me.

If this arrangement is acceptable to you, please sign and return one copy of
this letter to me.

 

Citigroup Inc.

 

By:  /s/ Michael L. Corbat                                        By:  /s/
Robert L. Joss Michael L. Corbat Dr. Robert L. Joss   Chief Executive Officer

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