Northern Superior Announces Approval of Arrangement Resolution

Press Release

Toronto, Ontario, Canada, December 10, 2025 – Northern Superior Resources Inc. (“Northern Superior” or the “Company”) (TSXV: SUP) (OTCQB: NSUPF) (GR: D9M1) is pleased to announce the approval by the shareholders of the Company (the “Shareholders”) at the special meeting of Shareholders (the “Meeting”) held earlier today of the previously announced statutory plan of arrangement (the “Arrangement”) under Division 5 of Part 9 of the Business Corporations Act (British Columbia).

The purpose of the Arrangement is to effect, among other things, (i) the acquisition of all of the issued and outstanding common shares of the Company (the “Company Shares”) by IAMGOLD Corporation (“IAMGOLD”) (NYSE: IAG) (TSX: IMG) in exchange for a combination of 0.0991 of a common share of IAMGOLD and $0.19 in cash for each Company Share, and (ii) the distribution of all the common shares of ONGold Resources Ltd. (“ONGold”) currently held directly or indirectly by the Company to the Shareholders, all in accordance with the terms of the arrangement agreement dated October 19, 2025 between the Company and IAMGOLD (the “Agreement”).

90,766,183 votes, or 99.03% of the votes cast by Shareholders present or represented by proxy at the Meeting were cast in favour of the special resolution approving the Arrangement (the “Arrangement Resolution”) (82,959,376 votes, or 98.94% of the votes cast in favour of the Arrangement Resolution, excluding Company Shares required to be excluded pursuant to Multilateral Instrument 61-101 – Protection of Minority Security Holders in Special Transactions (“MI 61-101”)). The Arrangement Resolution was required to be passed by (i) at least two-thirds of the votes cast by the Shareholders present or represented by proxy and entitled to vote at the Meeting; and (ii) a simple majority of the votes cast by the Shareholders present or represented by proxy and entitled to vote at the Meeting, excluding Company Shares required to be excluded pursuant to MI 61-101.

Northern Superior will present its application for a final order to the Supreme Court of British Columbia (the “Court”) on December 15, 2025. Subject to the Court’s approval and certain customary closing conditions, closing is currently expected to occur in the following days.

About Northern Superior Resources Inc.

Northern Superior is a gold exploration company focused on the Chibougamau Camp in Québec, Canada. The Company has consolidated the largest land package in the region, with total landholdings currently exceeding 70,000 hectares. The main properties include Philibert, Hazeur (adjacent to Philibert), Lac Surprise (adjacent to Nelligan), Chevrier, Croteau, Monster Lake East, and Monster Lake West. Northern Superior also owns 48.5% of ONGold which is advancing promising exploration assets in Northern Ontario and Manitoba, including the district scale TPK Project and Monument Bay; Agnico Eagle Mines Limited owns 13% of ONGold.

Northern Superior is a reporting issuer in British Columbia, Alberta, Ontario and Québec, and trades on the TSX Venture Exchange under the symbol SUP and the OTCQB Venture Market under the symbol NSUPF. For further information, please refer to the Company’s website at www.nsuperior.com or the Company’s profile on SEDAR+ at www.sedarplus.ca.

About IAMGOLD

IAMGOLD is an intermediate gold producer and developer based in Canada with operating mines in North America and West Africa, including Côté Gold (Canada), Westwood (Canada) and Essakane (Burkina Faso). The Côté Gold Mine achieved full nameplate in June 2025 and has the potential to be among the largest gold mines in Canada. IAMGOLD operates Côté in partnership with Sumitomo Metal Mining Co. Ltd. In addition, IAMGOLD has an established portfolio of early stage and advanced exploration projects within high potential mining districts. IAMGOLD employs approximately 3,700 people and is committed to maintaining its culture of accountable mining through high standards of Environmental, Social and Governance practices. IAMGOLD is listed on the New York Stock Exchange (NYSE: IAG) and the Toronto Stock Exchange (TSX: IMG).

Northern Superior Resources Inc. on Behalf of the Board of Directors

Simon Marcotte, CFA, President and Chief Executive Officer

Contact Information

Katrina Damouni

Director – Corporate Development

Tel: +44 7795 128583 (Mobile/WhatsApp)

info@nsuperior.com

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