Exhibit A

JOINT FILING AGREEMENT

The undersigned agree that this Schedule 13G Amendment No. 3 dated August 14, 2025 relating to the Common Stock, $0.01 par value, of Mammoth Energy Services, Inc. shall be filed on behalf of the undersigned.

VALUEWORKS LIMITED PARTNERS, LP

By: ValueWorks Capital, LLC, its general partner 

By: /s/ Charles Lemonides

Name: Charles Lemonides

Title:   Managing Member

VALUEWORKS CAPITAL, LLC

By: /s/ Charles Lemonides

Name: Charles Lemonides

Title:   Managing Member

VALUEWORKS LLC

By: /s/ Charles Lemonides

Name: Charles Lemonides

Title:   Managing Member

CHARLES LEMONIDES

By: /s/ Charles Lemonides