Marban Alliance - Community Meeting Update

• the state of progress of the two projects, Marban Alliance and Horizon;
• work planned in the coming weeks;
• Marban Alliance environmental and social assessment processes;
• the Corporation's responsible exploration program;
• relations with host communities; and
• job opportunities.

Marban Alliance: A Website Dedicated to The Community

Neighbourhood residents had the opportunity to consult the new tools available to them for information and communication with O3 Mining's representatives. Marban Alliance launched an informative website dedicated to communities and stakeholders, bringing together a wide range of information, including:

• a calendar of upcoming field work;
• a project schedule;
• various stages of the environmental and social assessment processes;
• a section devoted to environmental baseline studies; and more.

The community website is: www.marban-alliance.com

Community Contributions Program Unveiled

O3 Mining unveiled its Community Contributions Program, which details the areas of focus for supporting the social and economic development in the region. The Corporation's new Request Resolution and Reporting Policy was also presented. These two mechanisms are available to host communities to promote better cohabitation between the neighbourhood and O3 Mining.

New Consultation Activities - Fall 2023

A schedule for the participatory process was proposed. To this end, the Corporation is planning three meetings in the fall of 2023: a look back at the work done over the summer, a workshop on the potential deviation of the Keriens waterway, and the maintenance of the value of neighbouring homes. As the Marban Alliance project evolves in line with optimization studies, public input and environmental assessments, information will be updated regularly on the Marban Alliance website.

For O3 Mining, communication is essential to building a relationship of trust not only with local residents, but also with all stakeholders and neighbouring communities. The Corporation hopes that these new tools and its proposed participatory approach will encourage dialogue and transparency.

Myrzah Bello, Vice President, Sustainable Development and Human Resources, explains, "We firmly believe that the Marban Alliance project can be integrated into the region in a positive way, by working together with the host communities. Our approach to the information and discussion meeting received a favorable reception from the neighbourhood, the time allocated to personalized exchanges was particularly appreciated. We are considering repeating the experience by fall this year."

O3 Mining Inc. is a gold explorer and mine developer on the road to produce from its highly prospective gold camps in Québec, Canada. O3 Mining benefits from the support and expertise of a team of industry leaders as it grows towards becoming a gold producer with several multi-million-ounce deposits in Québec.

O3 Mining is well-capitalized and owns a 100% interest in all its properties (62,000 hectares) in Québec. O3 Mining trades on the TSX Venture Exchange (TSXV: OIII) and OTC Markets (OTCQX: OIIIF). The Corporation is focused on delivering superior returns to its shareholders and long-term benefits to its stakeholders. Further information can be found on our website at https://o3mining.com.

Cautionary Note Regarding Forward-Looking Information

This news release contains "forward-looking information" within the meaning of the applicable Canadian securities legislation that is based on expectations, estimates, projections, and interpretations as at the date of this news release. In this news release, such forward-looking information includes, but is not limited to, the following statements: expected annual production at the Marban Alliance project; life of mine at the Marban Alliance project; the Corporation's social license to operate; the timing and ability for the Corporation to complete a feasibility study for the Marban Alliance project, if at all; the timing for, and results of, the Corporation's optimization studies; and expected work, including field data collections. Any statement that involves discussions with respect to predictions, expectations, interpretations, beliefs, plans, projections, objectives, assumptions, future events or performance (often but not always using phrases such as "expects", or "does not expect", "is expected", "interpreted", "management's view", "anticipates" or "does not anticipate", "plans", "budget", "scheduled", "forecasts", "estimates", "believes" or "intends" or variations of such words and phrases or stating that certain actions, events or results "may" or "could", "would", "might" or "will" be taken to occur or be achieved) are not statements of historical fact and may be "forward-looking information" and are intended to identify forward-looking information. Except for statements of historical fact relating to the Corporation, certain information contained herein constitutes forward-looking statements. Forward-looking information is based on estimates of management of the Corporation, at the time it was made, involves known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the companies to be materially different from any future results, performance or achievements expressed or implied by such forward-looking information. Such factors include, among others, risks relating to the ability of exploration activities (including drilling) to accurately predict mineralization; errors in management's modelling; the ability of any material to be mined in a matter that is economic; the Corporation's ability to obtain any necessary permits, consents or authorizations required for its planned activities; the Corporation's ability to raise the necessary capital or to be fully able to implement its business strategies; and the price of gold. Although the forward-looking information contained in this news release is based upon what management believes, or believed at the time, to be reasonable assumptions, the parties cannot assure shareholders and prospective purchasers of securities that actual results will be consistent with such forward-looking information, as there may be other factors that cause results not to be as anticipated, estimated or intended, and neither the Corporation nor any other person assumes responsibility for the accuracy and completeness of any such forward-looking information. The Corporation believes that this forward-looking information is based on reasonable assumptions, but no assurance can be given that these expectations will prove to be correct and such forward-looking statements included in this news release should not be unduly relied upon. The Corporation does not undertake, and assumes no obligation, to update or revise any such forward-looking statements or forward-looking information contained herein to reflect new events or circumstances, except as may be required by law. These statements speak only as of the date of this news release.

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 news release. No stock exchange, securities commission or other regulatory authority has approved or disapproved the information contained herein.

SOURCE O3 Mining Inc.



Contact
For further information on O3 Mining, please contact: José Vzquerra | CEO, President & Director, info@o3mining.com; Alex Rodriguez | Vice President, Corporate Development, arodriguez@o3mining.com, Telephone: +1 (647) 391-7724, Toll Free: +1 (833) 979-3516