Sirios plans exploration for Quebec gold projects

Mr. Jean-Felix Lepage reports SIRIOS ANNOUNCES ITS FULLY FUNDED 2026 EXPLORATION PROGRAM Sirios Resources Inc. has planned an extensive, fully financed 2026 exploration program at several of its gold exploration projects in the Eeyou Istchee James Bay area of Quebec. Details of the proposed program are provided below. Cheechoo gold project An initial expansion drilling phase of approximately 25,000 metres will begin in the second quarter of 2026, with the objective of updating the resource estimate. Three sectors are targeted in this first phase, namely: Approximately 15,000 metres on the modelled exploration target, as presented in the resource estimate (refer to the press release dated July 10, 2025); Approximately 7,500 m in the metasediments at the northeastern contact of the main intrusive within the conceptual pit shell limiting the current mineral resources; Approximately 2,500 m in the higher-grade Eclipse sector west of the conceptual resource pit shell. "We're looking forward to getting drills turning at Cheechoo in the coming weeks," said Dominique Doucet, executive chairman and head of exploration at Sirios. "In addition, a second phase of at least 10,000 m of exploration and follow-up drilling is planned for the first quarter of 2027. The targeting and timing of this phase will be contingent on the results of the first phase." "This comprehensive 2026 drill program at Cheechoo will enable us to publish a new resource estimate," added Jean-Felix Lepage, Sirios's chief executive officer. "We will then use that information to complete a preliminary economic assessment in the first half of 2027." Aquilon A work program is planned for the third quarter of 2026 to follow up on the encouraging results obtained during the 2025 drilling campaign. This program will be developed in April by Sirios and its partner Sumitomo Metal Mining Canada. Sirios remains the operator of the Aquilon project, shared 49 per cent by Sirios and 51 per cent by Sumitomo. The work program will be announced once it has been confirmed by the partners. Plex The Plex project is the subject of compilation work by Sirios's experienced exploration team. A work plan will be developed before the end of the third quarter of 2026 with the objective of initiating exploration work in 2027. The project spans 21,000 hectares along a greenstone belt at the contact of La Grande and Opinaca subprovinces, which constitutes the main gold metallotect for Eeyou Istchee James Bay. Plex includes the Orfee zone, which was the subject of a 2003 estimate of 125,000 ounces at 14.5 grams per tonne gold. This estimate is considered a historical estimate, which is not compliant with National Instrument 43-101 and should not be relied upon as current mineral resources. Fagnant The Fagnant project is located approximately 60 kilometres east of Whapmagoostui and Kuujjuarapik, which are, respectively, Cree and Inuit communities on the border of Eeyou Istchee James Bay and Nunavik. The exclusive exploration rights acquired at Fagnant, totalling 98 square kilometres, cover more than 80 per cent of the Archean volcanosedimentary belt of the Great Whale. Between 1997 and 2000, about 30 gold or polymetallic (gold, silver, lead, zinc and copper) showings were discovered by prospecting. In 2018, only a brief inspection of the showings was conducted by the former holders, validating the 1997-2000 results with selected samples grading up to 44 g/t gold. Sirios considers these results to be historical within the meaning of NI 43-101. There has been no sufficient work by a qualified person to classify them as current. A helicopter-borne magnetic survey covering the entire property will be conducted in second quarter 2026, and will be the first significant survey initiated by Sirios since acquiring this project by map designation in 2024. Marketing engagement The company announces that it has entered into a marketing service agreement with Resource Stock Digest, a company based out of Texas, effective March 30, 2026, pursuant to which, among other things, RSD has agreed to provide certain promotional services to the company in accordance with Policy 3.4 (Investor Relations, Promotional and Market-Making Activities) of the TSX Venture Exchange. RSD has been engaged for a three-month advertising and marketing program for total cash consideration of $100,000 (U.S.). RSD conducts interviews with the company and produces company-approved content that is distributed to RSD's subscriber base, and connects issuers to the investment community across North America. There are no performance factors contained in the agreement, and RSD will not receive common shares or options as compensation. The agreement is subject to the approval of the exchange. RSD is owned and operated by Gerardo Del Real and Nick Hodge. About the Cheechoo gold project Cheechoo is located approximately 15 kilometres from the Eleonore mine and near infrastructure, including, among others, roads and hydroelectric facilities, in Eeyou Istchee James Bay, Canada. Cheechoo is at the resource development stage with 35 million tonnes indicated resources at 1.12 grams per tonne representing 1,262,000 ounces, and 42.7 Mt of inferred resources at 1.23 g/t, representing 1,688,000 oz. In addition, a conceptual exploration target ranging from 31 million to 40 million tonnes of mineralization grading between 1.27 and 1.45 g/t Au has been estimated. Readers should refer to the mineral resource estimate report, "Technical Report On The Cheechoo Project With An Updated Mineral Resource Estimate For The Cheechoo Gold Deposit, Eeyou Istchee James Bay, Quebec, Canada, dated July 1, 2025," by Pierre-Luc Richard of PLR Resources Inc., an independent and qualified person as defined by National Instrument 43-101. The complete technical report is available on SEDAR+ under Sirios's profile, as well as on the company's website. The mineralization at Cheechoo is of the reduced intrusion-related gold system type, with the main host rock being a tonalite intrusion. However, gold can also be found in metasedimentary rocks outside of the intrusion, representing additional potential. The 2026 drilling program will verify the potential of the exploration target. Qualified person The scientific and technical information in this press release has been reviewed and approved by Dominique Doucet, PEng, a qualified person under National Instrument 43-101. Mr. Doucet is executive chairman and head of exploration of Sirios. About Sirios Resources Inc. Sirios Resources is a Quebec-based mining exploration company focused on developing its high-potential gold project portfolio in the Eeyou Istchee James Bay region, Canada. Sirios completed the acquisition of OVI Mining on Feb. 27, 2026, a landmark event in the company's history. We seek Safe Harbor.