Tantalus to Report Second Quarter 2026 Financial Results on August 5, 2026

Tantalus Systems (TSX: GRID) (OTCQX: TGMPF) ("Tantalus" or the "Company"), a technology company dedicated to helping utilities modernize their distribution grids by harnessing the power of data, is pleased to announce that the Company will release its financial results for the quarter ended June 30, 2026, after the market closes on Wednesday, August 5, 2026.

The Company will hold a conference call and webcast to discuss the financial results on Thursday, August 6, 2026, at 10:00 am Eastern Time.

Conference Call Participant Dial In (Toll Free): 1-844-854-4410 Participant International Dial In: 1-412-317-5791 Participants, please ask to be joined into the Tantalus Systems call.

Webcast URL: https://event.choruscall.com/mediaframe/webcast.html?webcastid=tHvGHj5p .

A conference call and webcast replay will be available until August 13, 2026.

USA/Canada Toll Free: 1-855-669-9658 International Toll: 1-412-317-0088 Replay Access Code: 8840340

About Tantalus Systems Holding Inc. (TSX: GRID) (OTCQX: TGMPF) Tantalus is a technology company dedicated to helping utilities modernize their distribution grids by harnessing the power of data across all their devices and systems deployed throughout the entire distribution grid. We offer a grid modernization platform across multiple levels: intelligent connected devices, communications networks, data management, enterprise applications and analytics. Our solutions provide utilities with the flexibility they need to get the most value from existing infrastructure investments while leveraging advanced capabilities to plan for future requirements. All our technology is grounded in a data-centric approach that is designed to help utilities find the most cost-effective path to grid modernization with the least risk. Ultimately, we deliver Unified Intelligence to utilities of all kinds, so they can leverage data and insights across their entire grid, no matter what devices, systems or vendors they choose to work with. Learn more at http://www.tantalus.com/ .

Forward-Looking Statements This news release includes information, statements, beliefs and opinions which are forward-looking, and which reflect current estimates, expectations and projections about future events, and other statements that contain words such as "believe," "expect," "project," "should," "seek," "anticipate," "will," "intend," "positioned," "risk," "plan," "may," "estimate" or, in each case, their negative and words of similar meaning. By its nature, forward-looking information involves a number of risks, uncertainties and assumptions that could cause actual results or events to differ materially from those expressed or implied by the forward-looking information. These risks, uncertainties and assumptions could adversely affect the outcome and financial effects of the plans and events described herein. Readers should not place undue reliance on forward-looking information, which is based on the information available as of the date of this news release and Tantalus disclaims any intention or obligation to update or revise any forward-looking information contained in this new release, whether as a result of new information, future events or otherwise, unless required by applicable law. The forward-looking information included in this news release is expressly qualified in its entirety by this cautionary statement.