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LME.V ·

Under National Instrument 51-102

Financings

FORM 51-102F3

MATERIAL CHANGE REPORT

UNDER NATIONAL INSTRUMENT 51-102

Item 1. Name and Address of Reporting Issuer

Laurion Mineral Exploration Inc. (the “Corporation”)

40 King Street West, Suite 6600

Toronto, ON

M5H 3S1

Item 2. Date of Material Change

December 22, 2025

Item 3. News Release

A news release was disseminated on December 22, 2025 through TheNewswire,

a copy of which can be found on www.sedarplus.ca.

Item 4. Summary of Material Change

On December 22, 2025, the Corporation closed its previously announced non-

brokered private placement (the “Private Placement”) of flow-through units (“FT

Units”), for aggregate gross proceeds to the Corporation of $1,524,313.

Item 5. Full Description of Material Change

The Corporation announced that it has closed the Private Placement, which was

initially announced on December 17, 2025. Pursuant to the Private Placement, the

Corporation issued an aggregate of 4,619,130 FT Units at a subscription price of

$0.33 per FT Unit, for aggregate gross proceeds to the Corporation of $1,524,313.

Each FT Unit consists of one common share of the Corporation (each, a “ FT

Share”) and one-half of one common share purchase warrant (each, a “Warrant”).

Each Warrant entitles the holder thereof to acquire one non flow-through common

share of the Corporation at a price of $0.39 per share for a period of 24 months

from the date of issuance. The FT Shares and the Warrants comprising the FT

Units qualify a s “flow- through shares”, as defined in subsection 66(15) of the

Income Tax Act (Canada) (the “Tax Act”).

The gross proceeds of the Private Placement will be used for “Canadian

exploration expenses” (within the meaning of the Tax Act), which will qualify, once

renounced, as “flow-through mining expenditures”, as defined in the Tax Act, which

will be renounced with an effective date of no later than December 31, 2025

(provided the subscriber deals at arm’s length with the Corporation at all relevant

times) to the initial purchasers of FT Units in an aggregate amount not less than

the gross proceeds raised from the issue of the FT Units. The Corporation intends

to allocate the proceeds from the Private Placement to advance the Corporation’s

2026 drill program on the Ishkõday property.

– 2 –

In connection with the Private Placement, certain arm’s-length finders received an

aggregate of $66,559 as a cash finder’s commission and an aggregate of 201,693

finder’s warrants. Each finder’s warrant entitles the holder thereof to acquire one

non flow-through common share of the Corporation at a price of $0.33 per share

for a period of 24 months from the date of issuance.

Pursuant to applicable Canadian securities laws, all securities issued pursuant to

the Private Placement are subject to a hold period of four months and one day,

expiring on April 23, 2026. The Private Placement remains subject to the final

approval of the TSX Venture Exchange.

Item 6. Reliance on subsection 7.1(2) of National Instrument 51-102

Not applicable.

Item 7. Omitted Information

Not Applicable.

Item 8. Executive Officer

Cynthia Le Sueur-Aquin

President and Chief Executive Officer

Tel: 1-705-788-9186

Fax: 1-705-805-9256

Item 9. Date of Report

December 23, 2025.