Exhibit A

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) of the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a Statement on Schedule 13G (including any and all amendments thereto) with respect to the Ordinary Shares of Plum Acquisition Corp. IV, and further agree that this Joint Filing Agreement shall be included as an Exhibit to such joint filing. In evidence thereof, the undersigned, being duly authorized, hereby execute this Joint Filing Agreement as of August 14, 2025.

Dated:  August 14, 2025
WESTCHESTER CAPITAL MANAGEMENT, LLC
 

By:
 /s/ CaSaundra Wu

 
Name: 
CaSaundra Wu
    Title:   
Chief Compliance Officer
 


VIRTUS INVESTMENT ADVISERS, LLC
 

By:
 /s/ Chetram Persaud

 
Name: 
Chetram Persaud
    Title:   
Chief Compliance Officer




THE MERGER FUND
 

By:
 /s/ Daphne Chisolm

 
Name:
 Daphne Chisolm
    Title:
 Vice President, Counsel and Assistant Secretary