CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
 
In connection with the attached Report on Form N-CSRS for Impax Funds Series Trust III (the “Registrant”), each of the undersigned officers hereby certifies, to the best of such officer’s knowledge, that:
 
1.
            
The Form N-CSRS of the Registrant for the period ended June 30, 2026 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
 
2.
            
The information contained in the Form N-CSRS of the Registrant for the period ended June 30, 2026 fairly presents, in all material respects, the financial condition and results of operations of the Registrant.
 
Date:  8/26/26
 
 /s/ Edward Farrington   
      
 
Ed Farrington
President (Principal Executive Officer)
 
 
/s/ Daniel Saltus                       
 
Daniel Saltus
Treasurer (Principal Financial Officer)