Onyx to Host Webinar on May 14, 2026 at 10:00am PT/1:00pm ET to Provide Update on Munro-Croesus Drill Program

Onyx Gold Corp. (TSXV: ONYX,OTC:ONXGF) (OTCQX: ONXGF) ("Onyx" or the "Company") will be hosting an exploration and technical webinar on May 14, 2026 at 10:00am PT 1:00 pm ET to provide an in-depth update on the Company's ongoing and expanded 110,000 m drill program at its 100%-owned Munro-Croesus Project, located 75 km east of Timmins, Ontario.

Onyx President & CEO, Brock Colterjohn, and VP Exploration, Conor McKinley, will review recent drilling results, key geological developments, and emerging exploration trends identified through the program to date. Management will also discuss priority targets and the strategy for the remaining ~50% of the fully funded drill program scheduled to be completed through year-end 2026.

The webinar will include discussion around:

• Expansion drilling at the Argus discovery area
• Emerging structural and geological interpretations across the broader Munro-Croesus Project
• Priority exploration targets along the Pipestone Fault corridor
• Upcoming catalysts, drilling objectives, and expected news flow through 2026

Webinar Details

The Onyx Gold webinar will take place on Thursday, May 14, 2026, at 10:00 am PT/1:00 pm ET. Management will be available to answer questions following the presentation.

Online registration and participation details may be found at the following link:

https://my.demio.com/ref/YE0MQWQjKU2lb7y4

For those unable to attend live, a recording of the webinar will be made available on the Company's website following the broadcast.

About Onyx Gold

Onyx Gold Corp. (TSXV: ONYX,OTC:ONXGF) (OTCQX: ONXGF) is a Canadian exploration company focused on unlocking district-scale gold opportunities in two of the country's most prolific and proven mining jurisdictions — Timmins, Ontario, and Yukon Territory.

In the Timmins Gold Camp, Onyx controls an extensive portfolio anchored by the 109 km² Munro-Croesus Property, host to the historic high-grade Croesus Mine and site of the Company's recent Argus North discovery - one of the most exciting new gold zones emerging in the camp. Complementing Munro-Croesus are two large, early-stage projects - Golden Mile, a 140 km² property situated just 9 km from Discovery Silver's multi-million-ounce Hoyle Pond Mine, and Timmins South, a 187 km² land package strategically positioned around the Shaw Dome structure, offering exceptional discovery potential.

Beyond Ontario, Onyx holds a commanding land position across four properties in Yukon's Selwyn Basin, an area rapidly gaining recognition for new gold discoveries and growing exploration investment. The Company's King Tut Property sits approximately 50 km south of Snowline Gold's Valley discovery and adjacent to Fireweed Metals' MacPass property.

Led by an experienced team with a strong track record of discovery, development, and value creation, Onyx Gold is well-funded and committed to delivering shareholder value through disciplined exploration, strategic growth, and responsible resource development.

On Behalf of Onyx Gold Corp.

"Brock Colterjohn"
President & CEO

Neither 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 release.

Cautionary and Forward-Looking Statements

Forward-looking statements include predictions, projections, and forecasts and are often, but not always, identified by the use of words such as "seek", "anticipate", "believe", "plan", "estimate", "forecast", "expect", "potential", "project", "target", "schedule", "budget" and "intend" and statements that an event or result "may", "will", "should", "could" or "might" occur or be achieved and other similar expressions and includes the negatives thereof. All statements other than statements of historical fact included in this release, including, without limitation, statements regarding the potential significance of the latest results from the Argus North discovery are forward-looking statements that involve various risks and uncertainties. There can be no assurance that such statements will prove to be accurate and actual results and future events could differ materially from those anticipated in such statements. Forward-looking statements are based on a number of material factors and assumptions. Important factors that could cause actual results to differ materially from Company's expectations include actual exploration results, changes in project parameters as plans continue to be refined, results of future resource estimates, future metal prices, availability of capital, and financing on acceptable terms, general economic, market or business conditions, uninsured risks, regulatory changes, defects in title, availability of personnel, materials, and equipment on a timely basis, accidents or equipment breakdowns, delays in receiving government approvals, unanticipated environmental impacts on operations and costs to remedy same, and other exploration or other risks detailed herein and from time to time in the filings made by the Company with securities regulators. Although management of the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements or forward-looking information, there may be other factors that cause results not to be as anticipated, estimated, or intended. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements and forward-looking information. Readers are cautioned that reliance on such information may not be appropriate for other purposes. The Company does not undertake to update any forward-looking statement, forward-looking information or financial outlook that are incorporated by reference herein, except in accordance with applicable securities laws. We seek safe harbor.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/296354