Mr. Jean-Philippe Mai reports

DST ANNOUNCES A PARTIAL SETTLEMENT OF FINANCIAL OBLIGATION

Dundee Sustainable Technologies Inc. on May 23, 2025, provided an update on the status of certain loans and convertible debentures held by the corporation that reached their maturity date on May 15, 2025, without repayment. These include $20-million in loans and $5.7-million in a convertible debenture. As of the date of this news release, DST has reached an agreement to settle its outstanding obligation for the portion corresponding to the convertible debenture.

This agreement was completed in accordance with the original terms and conditions, under which Dundee Corp. (DC) acted as guarantor for DST's convertible debenture. As a result of this settlement, DST is now discharged from its financial obligation in relation to the convertible debenture. The corporation remains committed to achieving a comprehensive solution that supports long-term stability.

"We are pleased to have resolved this portion of our financial commitments," said Jean-Philippe Mai, chief executive officer of DST. "This agreement represents meaningful progress toward our goal of restoring financial flexibility and ensuring the sustainability of our business."

DST will provide further updates as additional agreements are finalized.

About Dundee Sustainable Technologies Inc.

The corporation is engaged in the development and commercialization of environment-friendly technologies for the treatment of materials in the mining industry.

We seek Safe Harbor.