CHARBONE Announces the Signing of a Three-year UHP Oxygen Supply Contract with a Strategic American Customer, Strengthening its Presence in the United States

Brossard, Quebec, April 23, 2026 – CHARBONE CORPORATION (TSXV: CH; OTCQB: CHHYF; FSE: K47) (“CHARBONE” or the “Company”), a North American producer and distributor specializing in clean Ultra High Purity (“UHP”) hydrogen and strategic industrial gases, is pleased to announce the signing of a three (3) year supply contract with an American industrial client for the sale of UHP oxygen.

A structuring contractual commitment in the United States

This long-term contract strengthens the established business relationship with this US-based customer and follows previously announced orders, including an initial delivery of UHP oxygen. The agreement provides for a regular supply of UHP oxygen meeting the highest purity standards, thus supporting the customer’s critical operations in an advanced industrial sector.

Strengthening CHARBONE’s presence in a key market

The signing of this three-year contract marks a significant milestone in CHARBONE’s commercial expansion in the United States, particularly in the strategic “Tech Valley” region of New York State. It demonstrates the confidence placed in CHARBONE as a reliable partner for the supply of UHP industrial gases.

Acceleration of the multi-molecule strategy

This agreement is directly aligned with CHARBONE’s strategy to build an integrated platform of UHP industrial gases, combining hydrogen, oxygen, helium, and other specialty gases. By expanding its offering beyond hydrogen, CHARBONE strengthens its ability to meet the needs of advanced technology, pharmaceutical, and manufacturing industries.

CEO statement

“The signing of this three-year UHP oxygen supply contract with an American customer confirms the strength of our business relationship and our ability to deliver ultra-high purity gases according to the most demanding market standards,” said Dave Gagnon, CHARBONE’s Chief Executive Officer and Chairman of the Board. “This agreement strengthens our presence in the United States and fully validates our multi- molecule development strategy. We are pursuing our goal of becoming a key player in UHP industrial gases in North America.”

Momentum Public Relations Inc. Appointment

CHARBONE has retained the services of Momentum Public Relations Inc. (“Momentum”) for services related to its investor and media relations strategies. These services will be primarily provided by Mr. Maxence Gagné-Godbout, who acts at arm’s length from the Company. Under the agreement, Momentum will receive fees of $10,000 per month. The six-month agreement is valid until May 15, 2026. No other compensation is payable under this engagement. The agreement is subject to regulatory approval.

About CHARBONE CORPORATION

CHARBONE is a vertically integrated industrial gases company focused on developing and operating a network of supply hubs for the production, storage, and distribution of Ultra-High Purity (UHP) strategic industrial gases. The Company serves customers across sectors including semiconductors, artificial intelligence and data centers, advanced pharmaceuticals, and aerospace and defense technologies, where UHP gases are critical for high-precision manufacturing processes and operational performance. CHARBONE is advancing a network of clean UHP hydrogen production facilities across North America and selected international markets. The Company’s modular, decentralized, and demand-driven approach, combined with its integrated storage and distribution platform for all UHP gases, supports scalable growth, enhances operational flexibility, and enables more stable and diversified revenue generation. This model allows CHARBONE to efficiently serve mid-tier industrial gas customers with a reliable supply of UHP gases, including hydrogen, helium, oxygen, and any others that are in high-demand gases that are often difficult to source. The Company is committed to supporting the global transition to a lower-carbon economy by providing accessible, decentralized clean hydrogen and specialty gases, while addressing supply gaps for underserved industrial customers and accelerating the shift towards localized clean energy. CHARBONE is listed on the TSX Venture Exchange (TSXV: CH), the OTC Markets (OTCQB: CHHYF), and the Frankfurt Stock Exchange (FSE: K47).

Forward-Looking Statements

This press release contains statements that constitute “forward-looking information” within the meaning of Canadian securities laws (“forward-looking statements”). These forward-looking statements are often identified by words such as “intends”, “anticipates”, “expects”, “believes”, “plans”, “likely”, or similar words. Forward-looking statements reflect the respective expectations, estimates or projections of Charbone’s management regarding future results or events, based on opinions, assumptions and estimates considered reasonable by management at the date the statements are made. Although Charbone believes that the expectations expressed in the forward-looking statements are reasonable, forward-looking statements involve risks and uncertainties, and undue reliance should not be placed on forward-looking statements, as unknown or unpredictable factors could cause actual results to differ materially from those expressed in the forward-looking statements. Risks and uncertainties related to Charbone’s activities may affect forward-looking statements. These risks, uncertainties and assumptions include, without limitation, those described under “Risk Factors” in the Company’s management discussion and analysis for the period ended September 30, 2025, which can be accessed on SEDAR+ at www.sedarplus.ca; they could cause actual events or results to differ materially from those anticipated in the forward-looking statements. Unless required by applicable securities laws, Charbone does not undertake to update or revise the forward-looking statements.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this press release.