Opus One Gold Obtains 4.10 G/T Gold Over 7.1 M From Hole No-25-13, At 550 Vertical Meters On Its Zone 1 Gold Discovery, Noyell Project

/EIN News/ -- NOT FOR DISTRIBUTION TO U.S NEWSWIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES

MONTREAL, June 10, 2025 (GLOBE NEWSWIRE) --  Opus One Gold Corp (TSX-V: OOR) (the “Company” or “Opus One”) is pleased to announce that drill hole NO-25-13 from the winter drilling program on its 100% owned Noyell project near the town of Matagami, Abitibi, Québec, Canada, returned 4.10g/t Au over 7.1 m from 572.8 to 579.9 m. The mineralized interval represents a true width of approximately 5.5 m within the Zone 1 structure.

This is the deepest interval on Zone 1 so far indicating that the mineralization is open at depth. This hole was drilled in the eastern portion of Zone 1, approximately 125m to the east of the previously announced hole NO-25-05. The mineralized zone is strong and appears to represent an important vector of high grade within Zone 1.

Hole NO-25-10a was drilled closer to surface to test the western extension of Zone 1. It returned a marginal value of 1.54 g/t Au over 2.2 m (true width of 1.54m) from 160.3 to 162.5 m. It also retuned an interval of 2.63 g/t Au over 3.2 m (true width of 2.29 m) from 175.2 to 178.4 m.

Hole NO-25-11 was drilled 100 m above and to the west of the previous one to test the same possible extension of Zone 1. It also returned a marginal value of 1.56 g/t Au over 1.8 m from 111.8 to 113.6 m (true width of 1.5 m).

Hole NO-25-12 is an in-fill drill hole located nearly 200 m to the east of NO-25-10a. It returned 2.24 g/t Au over 6.6 m (true width of 5.5 m) from 188.1 to 194.7m, at a vertical depth of approximately 175m. Although the grade is not exceptional, the mineralized zone appears very strong.

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

2025 WINTER DRILLING RESULTS TO DATE

More assay results are expected soon.

Louis Morin, Opus One CEO commented: Hole NO-25-13, the deepest drilled on the property to date, opens new horizons for Zone 1. It clearly indicates that the mineralization is open at depth and continuous from surface down to the 550 m level. It also appears to indicate a vector for the mineralization of Zone 1 which might be raking steeply to the east.

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) 826-1579

info@OpusOneGold.com

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

Photos accompanying this announcement are available at

https://www.globenewswire.com/NewsRoom/AttachmentNg/8b4074dc-6ee6-488c-a40b-b92522a847bb

https://www.globenewswire.com/NewsRoom/AttachmentNg/bf6c00e9-4c64-4a1a-b074-ad738eedb9ce

https://www.globenewswire.com/NewsRoom/AttachmentNg/3f5add12-e841-492b-ba16-2484aee4242d

https://www.globenewswire.com/NewsRoom/AttachmentNg/8c034fd7-4e57-4212-9070-fefc14e2a6a9

https://www.globenewswire.com/NewsRoom/AttachmentNg/a9a321ab-efea-489f-80a2-b48aee5c2f00

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

Figure 1

Figure 1

Figure 2

Figure 2

Figure 3

Figure 3