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HIGHLIGHTS

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5 shallow exploratory drill holes were completed on the West Zone of the Noyell property.

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This old gold showing area was never drill tested by Opus One before.

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All drill holes intersected the main target over a strike length of 800 m.

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All drill holes returned significant gold results above the 300 m level.

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This represents the probable continuity of the gold mineralization on the neighboring property to the west.

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The West Zone will become another area where definition drilling should be performed during the next phase of work.

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MONTREAL, Sept. 02, 2026 (GLOBE NEWSWIRE) — Opus One Gold Corp (TSX-V: OOR) (the “Company” or “Opus One”) is pleased to release more assay results from the 2026 drilling program on its 100% owned Noyell property located in the northern portion of the Abitibi greenstone belt near the town of Matagami, Quebec, Canada.

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Opus One finally received all assay results from the drilling completed over an 800 m strike length in the western portion of its Noyell property. This old gold showing area was never drill tested by Opus One before. A total of 5 shallow exploratory drill holes (1,467 m) were completed over the sector to test for potential economic gold mineralization. As it was a preliminary drill program, the goal was not to carry out definition drilling but to get a better understanding of the gold environment which is quite different from what we observe at Zone 1 (center of the property) even though, the gold mineralization appears to be found along the same favorable structure

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DRILL HOLE COORDINATES

Article contentHole NumberEastingNorthingBearingDipLength (m)NO-26-09309150,005488350,00358-63372NO-26-16308950,005488500,00359-55150NO-26-17308800,005488580,00359-62207NO-26-20308750,005488400,00358-68330NO-26-22308400,005488450,00358-71408      Article content

ASSAY RESULTS

Article contentDDHZoneFromToLength (m)True WidthAu (g/t)NO-26-09Zone 1 Ouest240,42249,328,96,851,03NO-26-09Zone 2 Ouest268,06269,251,190,923,48NO-26-16Zone 1 Ouest110,17120,5810,418,730,50NO-26-17Zone 1 Ouest75,2979,253,963,071,11NO-26-20Zone 1 Ouest271,18279,478,296,431,34NO-26-22Zone 1 Ouest295,13304,29,076,621,18NO-26-22Zone 2 Ouest325,14330,275,133,770,71       Article content

DRILL HOLE LOCATION MAP – ZONE WEST

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Geologically speaking, Zone West is underlain by alternating bands of sheared sediments and volcanics dipping to the south at -55°. The gold mineralization is observed in a possible mylonitic zone within fractured intermediate volcanics. A fair amount of sulphides (5 – 15% mostly pyrrhotite with minor pyrite and arsenopyrite) is observed within the altered package (chlorite, graphite, silica, ankerite). This environment differs significantly from Zone 1 (central area) which consists of a quartz, ankerite and semi massive sulphide stockwork within an altered but not sheared sedimentary package. The dip is also steeper (-67°S).