Opus One Gold Obtains 8.96 g/t Gold Over 5.2 m From 165 to 170.2 m Followed By 2.91 g/t Au Over 9.9 m From 179.2 to 189.1m From Hole No-25-14, at 200 Vertical Meters on Its Zone 1 Gold Discovery, Noyell Project and Appoints a New Director

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/EIN News/ -- MONTREAL, June 16, 2025 (GLOBE NEWSWIRE) -- Opus One Gold Corp (TSX-V: OOR) (the “Company” or “Opus One”) is pleased to announce that drill hole NO-25-14 from the winter drilling program on its 100% owned Noyell project near the town of Matagami, Abitibi, Québec, Canada, returned 8.96g/t Au over 5.2 m from 165 to 170.2 m. The mineralized interval represents a true width of approximately 4.2 m within the Zone 1 structure. This hole returned a second interval grading 2.91 g/t Au over 9.9 m (true width of 8 m) from 179.2 to 189.1 m. These intervals represent the core of the near surface high grade portion of Zone 1.

Hole NO-25-15a (hole NO-25-15 was abandoned due to technical difficulties), was drilled to test the depth extension of Zone 1 at a vertical depth of 525 m some 100 m to the west of NO-25-08a (previously reported). This hole returned 1.73 g/t Au over 3.0 m from 536 to 539 m (true width of 2.4 m). Although this interval appears to be low grade, Zone 1 is still strong and continues at depth.

Hole NO-25-16 was drilled 100 m to the west of the previous one. It returned 1.61 g/t Au over 2 m from 511 to 513 m. Zone 1 is clearly present and extends at depth in that sector as well.

2025 Drill hole location and parameters to date are as follows:

2025 WINTER DRILLING RESULTS TO DATE

More assay results are expected soon.

We are pleased to welcome the Honorable Christian Paradis, who joins Opus One's Board of Directors as an independent director. His extensive experience as Minister of Natural Resources at the federal government and as a businessman will provide a strategic asset for the company's future

Louis Morin, Opus One CEO commented: Hole NO-25-14, returned spectacular intervals in the near surface portion of Zone 1. These results are significant for the future of the project. Holes NO-25-15a and 16 are important as well. Both holes intersected Zone 1 at a depth of at least 500 m vertically. If we take into consideration the results from Hole BO-25-13 (published recently), Zone 1 extends from surface down to the 550 m meter level and possibly beyond and it still delivers spectacular results. It is with pleasure we are joining Mr. Christian Paradis to our board. He has extensive knowledge about the mining industry, and he demonstrated enthusiasm about joining our board when he found out about our Noyell flagship gold project.

Sample preparation, analysis and QAQC program

All core recovered is NQ size. 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 project, 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 31^st, 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) 402-0388
info@OpusOneGold.com

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

Photos accompanying this announcement are available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/44550029-bff6-4981-b2fb-75194843ecce

https://www.globenewswire.com/NewsRoom/AttachmentNg/2b7c2ba3-672f-4094-9b3c-5ae8a87ad511

https://www.globenewswire.com/NewsRoom/AttachmentNg/2c1aecd3-e9db-4281-9737-36e6bb98f97f

https://www.globenewswire.com/NewsRoom/AttachmentNg/96688807-8225-4440-a7d2-25a144b1dd16

https://www.globenewswire.com/NewsRoom/AttachmentNg/319b17a4-2656-46fb-bb48-e3fefcab72eb

2025 Drill hole location and parameters to date

2025 Drill hole location and parameters to date

2025 WINTER DRILLING RESULTS TO DATE

2025 WINTER DRILLING RESULTS TO DATE

Projects Location

Sedimentary and Greenstone Belts

Project Noyell

Geology

Longitudinal Section - Metal Factor

Noyell Project - Zone 1