TONIX PHARMACEUTICALS HOLDING CORP. 509 Madison Avenue, Suite 306 New York, New York 10022

Exhibit 10.04

TONIX PHARMACEUTICALS HOLDING CORP.

509 Madison Avenue, Suite 306

New York, New York 10022

March 19, 2014

VIA EMAIL

Leland Gershell

509 Madison Avenue, Suite 306

New York, New York 10022

Dear Mr. Gershell:

This letter shall serve as a mutual agreement to terminate the employment agreement dated April 1, 2012 by and between Tonix Pharmaceuticals Holding Corp. and Leland Gershell, as amended on October 15, 2013 (the “Agreement”). As the Agreement is being terminated in connection with a new employment agreement being entered into between the parties, Leland Gershell waives any rights to, and agrees that no severance payments shall be due to him, pursuant to Section 6 of the Agreement, in connection with this mutual termination of the Agreement.

Accepted to and agreed this

19th day of March, 2014:

/s/ LELAND GERSHELL

Leland Gershell