Exhibit 32.1
 
Certification
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)
 
Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of MabVax Therapeutics Holdings, Inc., does hereby certify, to such officer’s knowledge, that:
 
The Quarterly Report on Form 10-Q of MabVax Therapeutics Holdings, Inc. for the three months ended March 31, 2018, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of MabVax Therapeutics Holdings, Inc.
 
 
 
 
 
Date: October 15, 2018
 
By:
/s/ J. David Hansen
 
 
 
J. David Hansen
 
 
 
Chief Executive Officer (Principal
Executive Officer)
 
 
 
Date: October 15, 2018
 
By:
/s/ Gregory P. Hanson
 
 
 
Gregory P. Hanson
 
 
 
Chief Financial Officer (Principal
Financial and Accounting Officer)
 
A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.