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OOR.V ·

800 Square Victoria, #3500

Corporate Updates

800 Square Victoria, #3500

Montreal, Québec, H4Z 1E3

Tel: (514) 591-3988

[email protected]

NEWS RELEASE

MAY 21, 2025 TRADING SYMBOL: TSX-V: OOR

OPUS ONE GOLD OBTAINS 3.79 G/T GOLD OVER 6.7 M AT 57 M FROM HOLE NO-

25-03 ON ITS ZONE 1 GOLD DISCOVERY, NOYELL PROJECT

NOT FOR DISTRIBUTION TO U.S NEWSWIRE SERVICES OR FOR

DISSEMINATION IN THE UNITED STATES

Montreal, May 21, 2025, Opus One Gold Corp (TSX-V: OOR) (the “Company” or “Opus

One”) is pleased to announce that drill hole NO-25-03 from the winter drilling program on

its 100% owned Noyell project near the town of Matagami , Abitibi, Québec , Canada,

returned 3.79 g/t Au over 6.7 m from 57.2 to 63.9 m. The mineralized interval represents

a true width of approximately 5.26 m within the Zone 1 structure.

NO-25-03 was drilled in the upper portion of the mineralized structure, a sector that had

seen very limited drilling in the past. Zone 1 was intersected at a vertical depth of 50 m

below surface. This is the shallowest hole drilled to date on the Zone 1 Discovery

indicating that the gold mineralization probably reaches the base of the overburden, which

is approximately 20 m thick in this area.

Drill Hole NO-25-02 was also drilled near surface, approximately 70 m to the east of NO-

25-03. It intersected the Zone 1 structure which was only weakly mineralized returning

1.06 g/t Au over 0.5m (true width of 0.47m) between 174.3 and 174.8 m.

Drill Hole NO-25-04 reached its target at approximately 270 vertical meters, in the western

portion of Zone 1. Zone 1 returned 2.47 g/t Au over 1.0 m (true width of 0.72m) between

297.8 and 298.8 m. Both holes, NO -25-02 and 04, intersected areas of weak gold

mineralization within Zone 1.

Drill hole location and parameters are as follows:

Drill Hole Bearing Dip Start End Length Easting Northing Elevation

NO-25-01 358,22 -60,12 0 225 225 311512,6 5487989 271,1

NO-25-02 4,93 -45,08 0 201 201 311666,3 5487946 273,53

NO-25-03 355,02 -58,02 0 171 171 311614,6 5488035 273,12

NO-25-04 357,98 -71,95 0 375 375 311510,6 5487889 271,52

More assay results are expected soon.

Louis Morin, Opus One CEO commented: Shallow drilling on Noyell’s Zone 1 Discovery

continues to deliver significant gold intervals. This is new information for us. It would

certainly be interesting to build a gold resource so close to surface in such an ideal

environment. As we are located only 25 Km south from the city of Matagami, a mining

friendly community, and only 14 Km from regional road 109, our Noyell project is starting

to reveal a different potential pers pective than initial exploration programs were

presenting. Being located close to infrastructures allows Opus One for low exploration

costs and eventually low development costs.

Opus One Gold Corp. will be at The Mining Investment Event at Centre des Congres

In Quebec City, June 3-5, 2025.

You are welcome to visit us at the MI3 Lounge.

www.themininginvestmentevent.com

Sample preparation, analysis and QAQC program

All samples are described, labelled, cut (diamond saw) and bagged at Technominex ’

facilities in Rouyn-Noranda. Samples are then shipped to AGAT certified Laboratory in

Val D’or for preparation. Sample pulps are then shipped to various AGAT laboratories in

Canada for analysis. Samples are assayed for gold using by Fire Assay (50g), with ICP-

OES Finish. All samples equal or above 10 g/t Au are submitted to ore grade gravimetric

finish.

Opus One’s QAQC program consists of one control sample inserted, at Technominex’

facility, after 9 regular samples. Control samples consist of a certified blank and various

gold grades certified material.

OPUS ONE Resources Inc.

Opus One Resources Inc. is a mining exploration company focused on discovering high

quality gold and base metals deposits within strategically located properties in proven

mining camps, close to existing mines in the Abitibi Greenstone Belt, north- western

Quebec and north-eastern Ontario - one of the most prolific gold mining areas in the world.

Opus One holds assets in the Val-d'Or and Matagami mineral districts.

An independent qualified person, Pierre O’Dowd P.Geo, has verified and approved the

data disclosed, including sampling, analytical, and test data underlying the information or

opinions contained in the written disclosure as required by section 3.1 and 3.2 of NI43-

101.

Forward-Looking Statements

This news release contains statements that may constitute “forward-looking information”

within the meaning of applicable Canadian securities legislation. Forward- looking

information may include, among others, statements regarding the future plans, costs,

objectives or performance of Opus One, or the assumptions underlying any of the

foregoing. In this news release, words such as “may”, “would”, “could”, “will”, “likely”,

“believe”, “expect”, “anticipate”, “intend”, “plan”, “estimate” and similar words and the

negative form thereof are used to identify forward- looking statements. Forward- looking

statements should not be read as guarantees of future performance or results, and will

not necessarily be accurate indications of whether, or the times at or by which, such future

performance will be achieved. No assurance can be given that any events anticipated by

the forward- looking information will transpire or occur, including the anticipated

exploration program on the project, the results of such exploration program, the

development of the project and what benefits Opus One will derive from the proj ect, the

expected demand for lithium. Forward- looking information is based on information

available at the time and/or management’s good-faith belief with respect to future events

and are subject to known or unknown risks, uncertainties, assumptions, and other

unpredictable factors, many of which are beyond Opus One’ control.

These risks, uncertainties and assumptions include, but are not limited to, those

described under “Financial Instruments” and “Risk and Uncertainties in Opus One’ Annual

Report for the fiscal year ended August 31st, 2022, a copy of which is available on SEDAR

at www.sedar.com and could cause actual events or results to differ materially from those

projected in any forward-looking statements. Opus One does not intend, nor does Opus

One undertake any obligation, to update or revise any forward- looking information

contained in this news release to reflect subsequent information, events or circumstances

or otherwise, except if required by applicable laws.

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 the release.

For more information, please contact:

Louis Morin

Chief Executive Officer & Director

Tel.: (514) 591-3988

Michael W. Kinley, CPA, CA

President, Chief Financial Officer & Director

Tel: (902) 826-1579

[email protected]

Visit Opus One’s website: www.OpusOneGold.com