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SOI.V ·

Sirios Extends the Gold Zone over 400 metres in the Metasediments East of the Cheechoo Gold Deposit

Drill Results

TSX-V: SOI

OTCQB: SIREF

December 12, 2023

Sirios Extends the Gold Zone over 400 metres in the Metasediments East of the

Cheechoo Gold Deposit

Montreal, QC – Management of Sirios Resources Inc. (TSX-V: SOI; OTCQB: SIREF) are pleased to

announce the results of 7 diamond drill holes that were completed as part of a drilling program aimed

at expanding the recently discovered mineralized zone in the metasediments (ref.: Press release

11/08/2022), located 300 meters east of the Cheechoo deposit . The Cheechoo deposit currently contains

indicated resources of 1.4 Moz Au as well as inferred resources of 500,000 ounces of gold (BBA, MRE

Update for the Cheechoo Project , 07/20/2022). The Cheechoo gold property, 100% owned by Sirios, is

located less than 10 km from Newmont's Éléonore gold mine in Eeyou Istchee Baie-James, Quebec.

Highlights:

• The 7 follow -up drill holes, completed in November 2023, all intersected the targeted

mineralized zone (Table 1) with multiple significant gold assays near surface , thus

demonstrating the strong continuity of this zone.

• 3.2 g/t Au over 9.0 metres (hole #301) was intersected 50 metres below the trench, which had

previously returned 2.7 g/t Au over 11.0 metres at surface(Trench 2022-B).

• These results define a mineralized zone with a northwest -southeast orientation, extending over

400 metres in length and with an average width of 10 metres (Figure 1). This zone, present at

the surface, has been traced to a depth of 100 metres and remains open in all directions.

• The 7 holes intersected the zone outside the conceptual pit limits of the 2022 Mineral Resource

Estimate (MRE).

• The Cheechoo metasediment mineralized zone is a new gold zone that was discovered at surface

in trenches during the summer of 2022. This zone shares geological characteristics similar to

those of the neighboring Éléonore mine, including gold mineralization associated with pyrrhotite

and arsenopyrite in meta -greywackes near the boundary between the La Grande and Opinaca

geological sub-provinces.

TABLE 1 : SIGNIFICANT RESULTS

Drill Hole

CH23- From (m) To (m) Au (g/t) Length* (m) Inside/Outside of MRE

Conceptual Pit

269E 121.0 132.5 0.85 11.5 Outside

298

11.0 15.5 0.64 4.5 Outside

27.0 39.5 1.45 12.5 Outside

81.5 86.7 0.59 5.2 Outside

299 52.0 56.0 1.19 4.0 Outside

61.0 90.5 0.67 29.5 Outside

301

29.0 49.5 0.74 20.5 Outside

56.5 65.5 3.18 9.0 Outside

Incl. 56.5 57.5 16.71 1.0 Outside

302 94.0 101.3 0.81 7.3 Outside

91.5 114.0 0.97 22.5 Outside

303 121.0 128.5 1.38 7.5 Outside

135.5 140.1 0.69 4.6 Outside

304 20.5 27.5 0.54 7.0 Outside

38.5 63.0 0.66 24.5 Outside

* Length along drill hole. Not necessarily equal to true width.

Intervals greater than 0.35 g/t Au with a maximum of 3 consecutive metres of waste material.

Table of drill holes coordinates is available at: www.sirios.com/bd-coordinates-drilled-20231212

Figure 1: Location of drill holes completed in November 2023 in the metasediments area.

Dominique Doucet, President and CEO of Sirios, stated: “We are very pleased with the results obtained

during this drilling program. The fact that all the drilling targeting gold zone has intersected significant

gold mineralization represents a remarkable exploration success. In addition , the expansion of this

continuous zone in the metasediments shows the potential for resource growth of the Cheechoo deposit

beyond the tonalite intrusion. More particularly, this new gold corridor makes it possible to generate very

interesting exploration targets towards the northwest, over several hundred metres, or even kilometres.”

Analytical quality control

The complete drilling campaign included nine holes for a total of 1,108 metres. All the drill core was

described and sampled by Sirios staff at the Cheechoo exploration camp. The core was split into two

halves, one sent to a certified commercial laboratory for analysis, and the other retained for future

reference. Following a strict analytical quality assurance and control program, blanks and certified

reference materials were integrated into the sampling sequence. A total of 627 samples were assayed for

gold, on approximately 500g of crushed material, with the Photon Assay TM method (PAAU02) at the

MSALABS laboratory located in Val-d'Or. Samples with the presence of visible gold were analyzed until

extinction with the Photon AssayTM method. Five samples with a background levels too high in U/Th to be

analyzed by Photon AssayTM were sent to the MSALABS laboratory in Langley, Ontario to be analyzed by

fire assay with atomic absorption finish. Whole rock geochemical analysis was also carried out by ICP -

MS and ICP-EOS on all samples.

The scientific and technical content of this press release has been reviewed and approved by Dominique

Doucet, P.Eng., President and CEO of Sirios Resources Inc. and Jordi Turcotte, P.Geo, qualified persons

under National Instrument 43-101.

About the Cheechoo Property

The Cheechoo gold property, 100% owned by Sirios, is located in Eeyou Istchee James Bay in Quebec,

200 km east of Wemindji and less than 10 km from the Newmont’s Eleonore gold mine. The project's

latest resource update delineated, for an open pit model, indicated resources of 1.4 million ounces of

gold contained in 46.3 million tonnes at an average grade of 0.94 g/t Au, as well as inferred resources of

500,000 ounces of gold contained in 21.1 million tonnes at a grade of 0.73 g/t Au (ref.: 12/06/2022 Press

Release).

About Sirios

Sirios Resources is a Canadian mining exploration company focused on developing its portfolio of high-

potential gold and lithium properties in the Eeyou Istchee James Bay region of Quebec.

Cautionary note regarding forward-looking information

This news release contains “forward -looking information” within the meaning of applicable Canadian

securities legislation based on expectations, estimates and projections as at the date of this news release.

Forward-looking information involves risks, unce rtainties and other factors that could cause actual

events, results, performance, prospects and opportunities to differ materially from those expressed or

implied by such forward-looking information. Factors that could cause actual results to differ materially

from such forward-looking information include, but are not limited to, capital and operating costs varying

significantly from estimates; the preliminary nature of metallurgical test results; delays in obtaining or

failures to obtain required governmental, environmental or other project approvals; uncertainties relating

to the availability and costs of financing needed in the future; changes in equity markets; inflation;

fluctuations in commodity prices; delays in the development of projects; the other risks involved in the

mineral exploration and development industry; and those risks set out in the Company’s public

documents filed on SEDAR at www.sedar.com. Although the Company believes that the assumptions

and factors used in preparing the forward looking information in this news release are reasonable, undue

reliance should not be placed on such information, which only applies as of the date of this news release,

and no assurance can be given that such events will occur in the disclosed time frames or at all. The

Company disclaims any intention or obligation to update or revise any forward - looking information,

whether as a result of new information, future events or otherwise, other than as required by law.

The estimate of Inferred Mineral Resources mentioned in this press release conform to National

Instrument 43-101 standards and was prepared by Pierre -Luc Richard, P. Geo., independent qualified

person, as defined by NI 43 -101 guidelines. The effective date of the estimate is July 20, 2022. The

above-mentioned mineral resources are not mineral reserves as they do not have demonstrated economic

viability. The quantity and grade of the reported Inferred Mineral Resources are conceptual in nature and

are estimated based on limited geological evidence and sampling. Geological evidence is sufficient to

imply but not verify geological and grade or quality continuity.

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 this release.

-30-

Contact:

Dominique Doucet, P.Eng., President and Chief Executive Officer

450-482-0603

[email protected]

Website: www.sirios.com