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JOINT NEWS RELEASE Agnico Eagle and O3 Mining Announce Subsequent Acquisition Transaction and Completion of Offer

Mergers & Acquisitions

JOINT NEWS RELEASE

Agnico Eagle and O3 Mining Announce

Subsequent Acquisition Transaction and Completion of Offer

• The Offer has now expired and Agnico Eagle has taken- up and acquired 95.6% of the

issued and outstanding O3 Mining shares

• Agnico Eagle and O3 Mining will enter into an amalgamation agreement under which

Agnico Eagle will acquire all remaining O3 Mining shares by way of amalgamation

• Remaining O3 Mining shares (other than shares held by dissenting shareholders) and

warrantholders who exercise their warrants after the amalgamation will receive $1.67 per

share in cash

• Questions or Need Assistance? Contact Laurel Hill Advisory Group for assistance at

1-877-452-7184 or email [email protected]

(All amounts expressed in Canadian dollars unless otherwise noted)

TORONTO – February 4, 2025 – Agnico Eagle Mines Limited (NYSE: AEM , TSX: AEM )

(“Agnico Eagle”) and O3 Mining Inc. (TSXV: OIII, OTCQX: OIIIF) (“O3 Mining”) are pleased to

jointly announce the expiry of Agnico Eagle’s board-supported take-over bid (the “Offer”) for all

of the outstanding common shares of O3 Mining (the “Common Shares”) for $1.67 in cash per

Common Share. Agnico Eagle has taken-up and acquired an aggregate of 114,785,237 Common

Shares that were tendered to the Offer, representing approximately 95.6% of the issued and

outstanding Common Shares on a basic basis. As a result, as of the date hereof, Agnico Eagl e

beneficially owns, and exercises control and direction over, an aggregate of 115,842,990

Common Shares, representing approximately 96.5 % of the issued and outstanding Common

Shares on a basic basis. This includes the additional 4,360,806 Common Shares (the “Deposited

Shares”) tendered to the Offer during the mandatory 10- day extension period that expired at

11:59 p.m. (EST) on February 3, 2025. The aggregate consideration payable for the Deposited

Shares is $7,282,546. Agnico Eagle will pay for the Deposited Shares by February 6, 2025.

Subsequent Acquisition Transaction

Agnico Eagle Abitibi Acquisition Corp., a wholly-owned subsidiary of Agnico Eagle, and O3 Mining

will amalgamate under the Business Corporations Act (Ontario) (the “Amalgamation”), with the

amalgamated entity (“Amalco”) becoming a wholly -owned subsidiary of Agnico Eagle. The

Amalgamation will constitute the subsequent acquisition transaction contemplated by the Offer

(the “Subsequent Acquisition Transaction”), by which Agnico Eagle will acquire ownership of

100% of the Common Shares.

Each O3 Mining shareholder (other than Agnico Eagle and any O3 Mining shareholder who validly

exercises dissent rights in relation to the Amalgamation) will, upon completion of the

Amalgamation, receive one redeemable preferred share of Amalco (each, a “Redeemable

Preferred Share”) for each Common Share held immediately prior to the effective time of the

Amalgamation. The Redeemable Preferred Shares will be automatically redeemed effective

immediately following the effective time of the Amalgamation for $1.67 in cash per Redeemable

Preferred Share (the “Redemption Consideration”) held immediately prior to the effective time

of the Amalgamation. The Redemption Consideration is the same as the considerati on that was

offered to O3 Mining shareholders under the Offer.

The Amalgamation must be approved by (i) at least two -thirds of the votes cast by O3 Mining

shareholders at a special meeting of O3 Mining shareholders (the “Meeting”) and (ii) a simple

majority of the votes cast by O3 Mining shareholders at the Meeting, excluding votes from O3

Mining shareholders required to be excluded by Multilateral Instrument 61- 101 – Protection of

Minority Securityholders in Special Transactions (“MI 61 -101”). As Agnico Eagle beneficially

owns, and exercises control and direction over , Common Shares carrying more than t wo-thirds

of the votes attached to all of the issued and outstanding Common Shares and the Common

Shares taken -up and acquired under the Offer represent more than a majority of the votes

attached to the Common Shares that may be voted in the “minority” vote under MI 61-101, Agnico

Eagle is able to ensure the successful outcome of the shareholder votes in respect of the

Amalgamation. The O3 Mining board recom mends that O3 Mining shareholders vote FOR

the Amalgamation.

Additional information regarding the terms of the amalgamation agreement and the Amalgamation

will be provided in the management information circular of O3 Mining (the “Circular”) for the

Meeting. It is anticipated that the Circular will be mailed to O3 Mining shareholders in February

2025 and the Meeting will be held in March 2025. Copies of the amalgamation agreement and

the Circular will be made available on O3 Mining ’s issuer profile on SEDAR+ at

www.sedarplus.ca.

The Amalgamation is expected to close prior to March 31, 2025 . Following completion of the

Amalgamation, the Common Shares will be de -listed from the TSX Venture Exchange and O3

Mining will make an application to the Ontario Securities Commission to cease to be a reporting

issuer under Canadian securities laws. Upon O3 Mining ceasing to be a reporting issuer, O3

Mining will no longer be subject to the ongoing continuous disclosure and reporting obligations

currently imposed on O3 Mining as a reporting issuer and will be a private company that is wholly-

owned by Agnico Eagle.

Information for Warrantholders

Certain Common Share purchase warrants of O3 Mining (the “Warrants”) remain issued and

outstanding, which are governed in accordance with the warrant indenture dated August 28, 2024

between O3 Mining and Odyssey Trust Company, as warrant agent . These Warrants are

exercisable at $1.45 per Warrant until August 28, 2026. O3 Mining intends to enter into a

supplemental indenture to provide that holders of such Warrants will receive, on exercise of their

Warrants in lieu of Common Shares, $1.67 in cash following the Amalgamation.

Updated Early Warning Disclosure Regarding O3 Mining

Immediately prior to the take- up of the Deposited Shares under the Offer, Agnico Eagle

beneficially owned, and exercised control and direction over, 111,482,184 Common Shar es,

representing approximately 92.9% of the issued and outstanding Common Shares on a basic

basis, and 270,000 Warrants exercisable for an aggregate of 270,000 Common Shares at an

exercise price of $1.45 per Warrant. In addition, Agnico Eagle holds a convertible senior

unsecured debenture in the principal amount of $10,000,000 dated June 19, 2023

(the “Convertible Debenture”). Assuming the full exercise of all Warrants held by Agnico Eagle

and the full conversion of the Convertible Debenture immediately prior to the take-up of Deposited

Shares under the Offer, Agnico Eagle would beneficially own, and exercise control and direction

over, 116,630,233 Common Shares , representing approximately 93.1 % of the issued and

outstanding Common Shares on a partially-diluted basis.

Agnico Eagle acquired an additional 4,360,806 Deposited Shares pursuant to the Offer during the

mandatory 10-day extension period, representing all of the Common Shares validly deposited

and not withdrawn as of 11:59 p.m. ( EST) on February 3, 2025, for aggregate consideration of

$7,282,546 in cash. As a result, as of the date hereof, Agnico Eagle beneficially owns, and

exercises control and direction over, an aggregate of 115,842,990 Common Shares, representing

approximately 96.5% of the issued and outstanding Common Shares on a basic basis. Assuming

the full exercise of all Warrants held by Agnico Eagle and the full conversion of the Convertible

Debenture, Agnico Eagle would beneficially own, and exercise control and direction over,

120,991,039 Common Shares, representing approximately 96.6% of the issued and outstanding

Common Shares on a partially-diluted basis.

An early warning report in respect of the foregoing will be filed by Agnico Eagle in accordance

with applicable securities laws. To obtain a copy of the early warning report, please contact:

Agnico Eagle Mines Limited

c/o Investor Relations

145 King Street East, Suite 400

Toronto, Ontario M5C 2Y7

Telephone: 416-947-1212

Email: [email protected]

Agnico Eagle’s head office is located a t 145 King Street East, Suite 400, Toronto, Ontario M5C

2Y7. O3 Mining’s head office is located at 155 University Avenue, Suite 1440, Toronto, Ontario

M5H 3B7.

Advisors

Edgehill Advisory Ltd. is acting as financial advisor to Agnico Eagle. Davies Ward Phillips &

Vineberg LLP is acting as legal advisor to Agnico Eagle.

Maxit Capital is acting as financial advisor to O3 Mining. Bennett Jones LLP is acting as legal

advisor to O3 Mining. Fort Capital is acting as financial advisor to the Special Committee of

independent directors of O3 Mining. Cassels Brock & Blackwell LLP is acting as legal advisor to

the Special Committee.

Odyssey Trust Company will act as depositary for the Amalgamation and Laurel Hill Advisory

Group is acting as information agent . If you have any questions or require assistance, please

contact Laurel Hill Advisory Group, by phone at 1- 877-452-7187 or by e- mail at

[email protected].

About O3 Mining Inc.

O3 Mining Inc. is a gold explorer and mine developer in Québec, Canada, adjacent to Agnico

Eagle’s Canadian Malartic mine. O3 Mining owns a 100% interest in all its properties (128 ,680

hectares) in Québec. Its principal asset is the Marban Alliance project in Québec, which O3 Mining

has advanced over the last five years to the cusp of its next stage of development, with the

expectation that the project will deliver long-term benefits to stakeholders.

About Agnico Eagle Mines Limited

Agnico Eagle is a Canadian based and led senior gold mining company and the third largest gold

producer in the world, producing precious metals from operations in Canada, Australia, Finland

and Mexico, with a pipeline of high-quality exploration and development projects. Agnico Eagle is

a partner of choice within the mining industry, recognized globally for its leading sustainability

practices. Agnico Eagle was founded in 1957 and has consistently created value for its

shareholders, declaring a cash dividend every year since 1983.

For further information on Agnico Eagle, please contact:

Investor Relations at [email protected] or call (416) 947-1212.

Cautionary Note Regarding Forward-Looking Information

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

Canadian securities legislation that is based on current expectations, estimates, projections, and

interpretations about future events as at the date of this news release. Forward- looking

information and statements are based on estimates of management by O3 Mining and Agnico

Eagle, at the time they were made, and involve known and unknown risks, uncertainties and other

factors which may c ause the actual results, performance or achievements to be materially

different from any future results, performance or achievements expressed or implied by such

forward-looking information or statements . Forward- looking statements in this news release

include, but are not limited to, statements regarding: the structure, consideration, timing and

completion (if at all) of the Subsequent Acquisition Transaction; the ability of Agnico Eagle to

complete the Subsequent Acquisition Transaction to acquire 100% of O3 Mining by way of the

Amalgamation (if at all); and the timing of the mailing of the Circular, the Meeting and completing

the Amalgamation. Material factors or assumptions that were applied in formulating the forward-

looking information contained herein include, without limitation, the expectations and beliefs of

Agnico Eagle and O3 Mining that any second-step transaction will be successful and the ability

to achieve goals , including the integration of the Marban Alliance property to the Canadian

Malartic land package and the ability to realize synergies arising therefrom. Agnico Eagle and O3

Mining caution that the foregoing list of material factors and assumptions is not exhaustive.

Although the forward- looking information contained in this news release is based upon what

Agnico Eagle and O3 Mining believe, or believed at the time, to be reasonable expectations and

assumptions, there is no assurance that actual results will be consistent with such forward-looking

information, as there may be other factors that cause results not to be as anticipated, estimated

or intended, and neither O3 Mining, nor Agnico Eagle nor any other person assumes responsibility

for the accuracy and completeness of any such forward- looking information. No assurance can

be given that these expectations will prove to be correct and such forward- looking statements

included in this news release should not be unduly relied upon. O3 Mining and Agnico Eagle do

not undertake, and assume no obligation, to update or revise any such f orward-looking

statements or forward- looking information contained herein to reflect new events or

circumstances, except as may be required by applicable law. These statements speak only as of

the date of this news release. Nothing contained herein shall be deemed to be a forecast,

projection or estimate of the future financial performance of Agnico Eagle or any of its affiliates or

O3 Mining.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is

defined in the policies of t he TSX Venture Exchange) accepts responsibility for the

adequacy or accuracy of this news release. No stock exchange, securities commission or

other regulatory authority has approved or disapproved the information contained herein.