Exhibit A

JOINT FILING AGREEMENT

The undersigned agree that this Schedule 13G dated December 1, 2025 relating to the Common Stock, par value $0.01 per share, of Chord Energy Corporation shall be filed on behalf of the undersigned.

KEY GROUP LONG TERM INVESTMENTS LP

By: /s/ Sunil Jagwani

Name: Sunil Jagwani

Title:   General Partner

SUNIL JAGWANI

By: /s/ Sunil Jagwani