Exhibit A

AGREEMENT

The undersigned agree that this Schedule 13D Amendment No. 1, dated June 18, 2025, relating to the Common Stock, par value $0.01 per share, of Quanex Building Products Corporation shall be filed on behalf of the undersigned.

June 18, 2025

(Date)

Teleios Capital Partners GmbH

/s/ Igor Kuzniar

Name: Igor Kuzniar

Title: Managing Officer

Teleios Global Opportunities Master Fund, Ltd.

/s/ Carl Speck

Name: Carl Speck

Title: Director

Igor Kuzniar

/s/ Igor Kuzniar