Mr. Paul Teniere reports

LAFLEUR ANNOUNCES FILING OF PROSPECTUS SUPPLEMENT

Further to Lafleur Minerals Inc.'s news releases of May 26 and May 27, 2026, the company has filed a prospectus supplement dated May 28, 2026, to the company's corresponding short form base shelf prospectus dated May 21, 2026.

The prospectus qualifies the distribution in the provinces of British Columbia, Alberta, Saskatchewan, Manitoba and Ontario (the offering jurisdictions) by the company of (i) 10.1 million units of the company at a price of 50 cents per unit; and (ii) 5,022,883 charity flow-through units of the company at a price of 68 cents per charity FT unit. Each unit will consist of (i) one common share in the capital of the company and one common share purchase warrant of the company. Each charity FT unit will consist of: (i) one common share in the capital of the company; and (ii) one common share purchase warrant of the company issued as part of a charity arrangement. Each unit warrant and charity FT unit warrant will be exercisable by the holder thereof to acquire one common share in the capital of the company at an exercise price of 75 cents for a period of 36 months following the closing of the offering.

This offering is made pursuant to an underwriting agreement dated May 28, 2026, between the company and Red Cloud Securities Inc., as sole underwriter and bookrunner. The company has granted to the underwriter an option, exercisable in whole or in part in the sole discretion of the underwriter at any time on or before the date that is 30 days after the closing date, to purchase (or arrange for the purchase by substituted purchasers of) that number of additional units at the unit price and/or charity FT units at the charity FT unit price (and any combination thereof) as is equal to 15 per cent of the number of firm units sold under the offering to cover overallotments, if any, and for market stabilization purposes.

Pursuant to the underwriting agreement, the company has agreed to pay the underwriter a cash commission equal to: (i) 7 per cent of the gross proceeds of the offering, including proceeds realized from the sale of any additional securities issued pursuant to the overallotment option, other than the gross proceeds raised from the sales of firm units or additional securities to "president's list" purchasers in the amount of up to $750,000 and (ii) 3.5 per cent of the gross proceeds raised from the president's list sales. The company has also agreed to issue to the underwriter a number of common share purchase warrants equal to: (i) 7 per cent of the number of firm units sold under the offering, including for certainty any additional securities sold pursuant to the exercise of the overallotment option, other than firm units, including any additional securities, sold pursuant to president's list sales; and (ii) 3.5 per cent of the number of firm units sold under the offering, including for certainty any additional securities sold pursuant to the exercise of the overallotment option, sold pursuant to president's list sales. Each compensation warrant is exercisable into one common share in the capital of the company at an exercise price of 50 cents per compensation warrant share for a period of 36 months following the closing date or closing date of the overallotment option, as applicable.

This prospectus also qualifies the grant of the overallotment option, the distribution of the additional securities to be issued and sold upon exercise of the overallotment option and the distribution of the compensation warrants.

Prospectus is accessible through SEDAR+

Access to the prospectus and any amendment thereto is provided, and delivery thereof will be satisfied, in accordance with the access equals delivery provisions of applicable securities legislation, relating to procedures for providing access to a shelf prospectus supplement, a base shelf prospectus and any amendment. The prospectus is available under the company's profile at SEDAR+. An electronic or paper copy of the prospectus and any amendment to thereto may be obtained, without charge, from Red Cloud Securities Inc., attention: Victoria Ellis Hayes, 120 Adelaide St. West, 14th floor, Toronto, Ont., M5H 1T1, e-mail: ecm@redcloudsecurities.com by providing the contact with an e-mail address or address, as applicable. Prospective investors should read the prospectus in its entirety before making an investment decision.

About Lafleur Minerals Inc.

Lafleur Minerals is focused on the development of district-scale gold projects in the Abitibi gold belt near Val d'Or, Que. The company's mission is to advance mining projects with a laser focus on its preliminary-economic-assessment-stage Swanson gold project and the Beacon Gold Mill, which have significant potential to deliver long-term value. The Swanson gold project is approximately 19,214 hectares (192 square kilometres) in size and includes several prospects rich in gold and critical metals previously held by Monarch Mining, Abcourt Mines, and Globex Mining. LaFleur has consolidated a large land package along a major structural break that hosts the Swanson, Bartec and Jolin gold deposits, and several other showings which make up the Swanson gold project. The Swanson gold project is easily accessible by road allowing direct access to several nearby gold mills, further enhancing its development potential. Lafleur Minerals' recently refurbished Beacon gold mill is capable of processing over 750 tonnes per day and is being considered for processing mineralized material from Swanson and for custom milling operations for other nearby gold projects. Lafleur recently released the results of a positive preliminary economic assessment (PEA) results for the company's Swanson gold project and the planned restart of the Beacon gold mill (refer to press release dated March 3, 2026).

We seek Safe Harbor.