Mr. Cesar Gonzalez reports

BONTERRA ANNOUNCES MAILING OF RIGHTS OFFERING MATERIALS

Bonterra Resources Inc. has completed the mail-out of the materials for its previously announced rights offering to eligible shareholders. A copy of the documents is also available for download from the company's profile on SEDAR+.

The company is offering rights to eligible holders of its common shares as of the record date of Aug. 6, 2026, on the basis of four-fifths (0.8) of a right for each one common share held. Each whole right will entitle the holder to subscribe for one share upon payment of a subscription price of 12 cents per share. The rights offering will expire at 12 p.m. Eastern Time on Aug. 27, 2026, after which time unexercised rights will be void and of no value. The rights are listed and posted for trading on the TSX Venture Exchange under the symbol BTR.RT on a when-issued basis and will expire at the expiry time.

The rights are offered to shareholders resident in (i) all provinces and territories of Canada, and (ii) in all jurisdictions outside Canada and the United States excluding any jurisdiction that does not provide a prospectus exemption substantially similar to the exemption provided in Canada or that otherwise requires obtaining any approvals of a regulatory authority in such jurisdiction or the filing of any document by the company in such jurisdiction in connection with the rights offering. Accordingly, and subject to the detailed provisions of the rights offering circular dated July 28, 2026, rights DRS certificates and subscription forms have not been mailed to shareholders resident outside of the eligible jurisdictions, unless such shareholders are able to establish to the satisfaction of the company, on or before Aug. 17, 2026, that they are eligible to participate in the rights offering. The company requests any ineligible shareholder interested in exercising their rights to contact the rights agent, Odyssey Trust Company, or the company at their earliest convenience. Shareholders who fully exercise their rights will be entitled to subscribe pro rata for additional shares not otherwise purchased, if any, as a result of unexercised rights prior to the expiry time, subject to certain limitations set out in the circular.

Registered shareholders who wish to exercise their rights must forward the completed subscription form, together with the applicable funds, to Odyssey Trust Company on or before the expiry time. Shareholders who own their shares through an intermediary, such as a bank, trust company, securities dealer or broker, will receive materials and instructions from their intermediary. Rights delivered to brokers, dealers or other intermediaries may not be delivered by those intermediaries to beneficial shareholders who are residents in a jurisdiction outside of Canada or in Quebec.

For more information about the rights offering, please see the company's news release dated July 28, 2026. The rights offering is subject to regulatory approval, including the approval of the TSX-V. The company has obtained conditional approval from the TSX-V.

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