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Osisko Metals Signs C$100 Million Investment Agreement with Appian Natural Resources Fund FOR a Joint Venture ON Pine Point

Financings Mergers & Acquisitions Partnerships & JV

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OSISKO METALS SIGNS C$100 MILLION INVESTMENT AGREEMENT WITH APPIAN

NATURAL RESOURCES FUND FOR A JOINT VENTURE ON PINE POINT

(Montreal, February 22, 2023) Osisko Metals Incorporated (the " Company or "Osisko Metals")

(TSX-V: OM; OTCQX: OMZNF; FRANKFURT: 0B51) is pleased to announce that it has entered into

an investment agreement dated February 21, 2023 (the "Investment Agreement") with a subsidiary of

Appian Natural Resources Fund III LP ("Appian"), a fund advised by Appian Capital Advisory LLP, a

London-based private equity group specializing in the acquisition and development of mining assets,

pursuant to which Osisko Metals and Appian have agreed to form a joint venture for the

advancement of the Pine Point Project (the "Transaction"), subject to satisfaction of certain terms

and conditions, including shareholder and stock exchange approvals. The Transaction is an arm's

length transaction within the policies of the TSX Venture Exchange (the "Exchange").

Highlights

• Commitment by Appian to invest up to C$100 million over an estimated four-year period,

to acquire an undivided 60% interest in Pine Point Mining Limited (" PPML"), a wholly-

owned subsidiary of Osisko Metals and owner of the Pine Point Project, at a pre-money

valuation of PPML of C$91.3 million.

• The C$100 million investment includes an estimated C$75.3 million of funding (C$19.8

million of which will be provided upon estab lishment of the joint venture, the " Initial

Subscription") to advance the Pine Point Project to a Final Investment Decision ("FID"),

or construction approval, and approximately C$24.7 million in cash payments to Osisko

Metals, comprised of:

o A C$8.3 million initial payment on closing of the Transaction to acquire an initial

9% interest in PPML; and

o A milestone payment upon positive FID to bring Appian's ownership in PPML to

60%, expected to be approximately C$16.4 million. The final milestone payment

will increase or decrease should the actual amount spent to FID differ from the

estimated budget of C$75.3 million.

• In addition, Appian has agreed to make a C$5 million investment in the common shares

of Osisko Metals on closing, priced at C$0.2481 per share (being the 20-day VWAP

calculated as of the date of this announcement).

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Robert Wares, Chairman & CEO, commented: "We are delighted to welcome Appian as a long-

term joint-venture partner for the advancement of the Pine Point Project. This milestone

agreement is a significant endorsement and daylight s the considerable intrinsic value of Pine

Point. The Transaction allows us to leverage Appian's extensive mine development experience

and includes a crucial investment of C$75 m illion into the Project that will advance the

development of Pine Point to a "shovel-ready" status. This funding is expected to cover all costs

including final definition drilling, additional exploration drilling, feasibility, environmental

assessment and permitting, including Indigenous engagements. This joint venture, coupled with

Appian's significant cash payments to Osisko Metals and C$5 million equity investment, will allow

Osisko Metals to focus on the development of other projects while avoiding excessive dilution to

advance the Pine Point Project."

Summary of Joint Venture

Osisko Metals and Appian have agreed to a budget to fund Pine Point to FID as follows:

Definition and Exploration Drilling C$25.2 million

Permitting and G&A C$29.3 million

Feasibility and Technical Studies C$8.7 million

Metallurgical Optimization Studies C$1.0 million

Geotech/Hydrogeological Studies C$4.3 million

Contingencies C$6.8 million

Total C$75.3 million

Subsequent to the closing of the Transaction and until Appian has acquired an ownership interest

of 60% in PPML (the "Target Ownership Percentage"), all funding in respect of the Pine Point

Project will be made by way of cash calls issued by the board of PPML to Appian, the quantum

and speed of which are determined at the sole discretion of the board of directors of PPML. The

Company will not be required to make any cash contributions to PPML until Appian has reached

the Target Ownership Percentage, following which cash calls will be satisfied by each of Appian

and Osisko Metals on a pro-rata basis pursuant to approved annual programs and budgets as

determined by the board of PPML. Pursuant to the terms of the Investment Agreement, in the

event of a protracted intervening event, Appian has a unilateral right to terminate its investment

commitment.

The board of directors of PPML will initially cons ist of four directors with two nominees from

Appian and two nominees from Osisko Metals. Appian will be entitled to appoint the Chair and

the Chair will have the casting vote. Upon Appian earning an interest in PPML above 50%, the

board of directors will consist of five directors with three nominees from Appian and two nominees

from Osisko Metals. The board of directors of PPML will be responsible for, among other things,

approving PPML's annual programs and budgets. Certain material decisions will require a super-

majority approval by the board of directors.

The joint venture agreement in respect of the Transaction, to be signed upon closing of the

Transaction, contains customary dilution mechanisms for failures to meet cash calls and certain

other events, as well as customary share transfer restrictions.

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Jeff Hussey, President & COO of Osisko Metals, will assume the role of Chief Executive Officer

of PPML and spearhead the initiative to advance Pine Point to FID. There are no changes

contemplated to the board of directors of Osisko Metals in connection with the Transaction.

Transaction Details

The Transaction is considered as a "reviewable disposition" under Policy 5.3 of the Exchange, as

it is a potential disposition of more than 50% of the ownership interest in the Pine Point Project,

which is Osisko Metal's only material property as of the date hereof. The Transaction is subject

to the simple majority approval of Osisko Metals' shareholders, Exchange approval and other

closing conditions customary in transactions of this nature. There is no certainty on the timing or

ability of Osisko Metals to complete the Transaction on the terms currently contemplated. The

Investment Agreement includes, among other thi ngs, a non-solicitation provision and a C$4.5

million termination fee payable by Osisko Metals to Appian under certain circumstances.

Concurrent with closing of the Transaction, Osis ko Metals and Appian will enter into an investor

rights agreement (the "Investor Rights Agreement"). The Investor Rights Agreement includes,

among other things, pre-emptive and top-up rights in favor of Appian, a standstill provision for a

period of 12 months and a share transfer restriction provision for a period of six months.

Osisko Metals believes that it will be in compliance with all continued listing requirements of the

Exchange following the completion of the Transaction. Osisko Metals expects to continue to meet

public float requirements and have sufficient working capital and financial resources as well as

experienced management and board. Although the Transaction contemplates a disposition of up

to 60% in the Pine Point Project, Osisko Metals will maintain a substantial 40% interest in the

Pine Point Project. In addition, Osisko Metals had exercised the option to earn a 100% interest in

the past-producing Gaspé Copper Mine with an inferred mineral resource estimate on the Gaspé

property effective April 12, 2022. No assurance can be provided as to Osisko Metals' continued

qualification for listing on the Exchange, whether as a Tier 1 issuer or otherwise. The Transaction,

including the C$5 million investment by Appian in the common shares of Osisko Metals, remains

subject to the approval of the Exchange.

For more details on the terms of the Transaction, please refer to a copy of the Investment

Agreement, which will be available electroni cally on SEDAR (www.sedar.com) under Osisko

Metals' issuer profile.

Fairness Opinion

Maxit Capital LP has provided a fairness opinion to the board of directors of Osisko Metals. The

fairness opinion stated that, as of the date thereof and, based upon and subject to the

assumptions, limitations and qualifications stated in such opinion, the Transaction is fair, from a

financial point of view, to the Company.

Board Approval

The board of directors of Osisko Metals, following consultation with their financial and legal

advisors, has unanimously approved the Transaction. The Board of Directors of Osisko Metals

recommends that shareholders vote FOR the Transaction.

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Voting Support Agreements

Shareholders collectively owning approximately 18.7% of the outstanding shares of Osisko Metals

as of the date hereof have entered into voting support agreements with Appian in support of the

Transaction. Directors and senior officers of Osisko Metals collectively owning approximately

18.2% of the outstanding shares of Osisko Metals have entered into voting support agreements

to support the Transaction. It is currently anticipated that the closing of the Transaction will occur

on or about late Q1 2023 or early Q2 2023.

Interim Funding

Concurrent with the execution with the Investment Agreement, Osisko Metals and Appian entered

into an agreement for the issuance of a convertible instrument to provide PPML with short-term

interim funding of up to C$11.5 million to fund the current drilling program on the Pine Point

Project, in accordance with the agreed initial program and budget. The current 29,000-metre

winter definition drilling program is progressing as planned with six drill rigs operating and this

program, with associated costs, will be integrated into the Investment Agreement and pre-FID

budget, retroactively as of December 1, 2022.

If the Investment Agreement is terminated and the Transaction does not close, the principal

amount then outstanding under the convertible instrument would then become repayable. Subject

to the approval of the Exchange at such a repayment event, the amount then outstanding under

the convertible instrument would be repaid by the issuance of common shares of Osisko Metals,

at the minimum permitted price under the policies of the Exchange, for up to 19.95% of the pro

forma number of issued and outstanding common shares of Osisko Metals, and the remaining

amount (if any) will be converted into a senior secured term loan.

If the Transaction is completed, any outstanding amounts under the convertible instrument would

be converted into an ownership interest in PPML and the Initial Subscription would be reduced

for the amounts outstanding under the convertible instrument. Such a conversion is subject to the

acceptance of the Exchange in respect of the Transaction as a whole.

Advisors and Counsel

Maxit Capital LP is acting as financial advisor to Osisko Metals and Bennett Jones LLP is acting

as the Company's legal counsel.

McCarthy Tétrault LLP is acting as Appian's legal counsel.

Qualified Person

Mr. Robin Adair is the Qualified Person and the Vice President of Exploration for Osisko Metals

Incorporated. He is responsible for the technical data reported in this news release and is a

Professional Geologist registered in the Northwest Territories.

About Osisko Metals

Osisko Metals Incorporated is a Canadian exploration and development company creating value

in the critical metals space, specifically copper and zinc. The Company controls one of Canada's

premier past-producing zinc mining camps, the Pine Point Project, located in the Northwest

Territories, for which the 2022 PEA has indicated an after-tax NPV of $602M and an IRR of 25%,

based on a long-term zinc price of US$1.37/lb and the current Mineral Resource Estimates

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("MRE") that are amenable to open pit and shallow underground mining. The latest MRE consists

of 15.7Mt grading 5.55% ZnEq of Indicated Mineral Resources and 47.2Mt grading 5.94% ZnEq

of Inferred Mineral Resources. Please refer to the technical report entitled "Preliminary Economic

Assessment, Pine Point Project, Hay River, Northwest Territories, Canada" dated July 30, which

has been filed on SEDAR. The Pine Point Project is located on the south shore of Great Slave

Lake in the Northwest Territories, near infrastructure, paved highway access, and has an

electrical substation as well as 100 kilometres of viable haulage roads already in place.

The Company is also in the process of acquiring, from Glencore Canada, a 100% interest in the

past-producing Gaspé Copper Mine, located near Murdochville in the Gaspé peninsula of

Quebec. The Company is currently focused on resource evaluation of the Mount Copper

Expansion Project that hosts a NI43-101 Inferred Resource of 456Mt grading 0.31% Cu (see April

28, 2022 press release). Gaspé Copper hosts the largest undeveloped copper resource in

Eastern North America, strategically located near existing infrastructure in the mining-friendly

province of Quebec.

About Appian

Appian Capital Advisory LLP is a London-headquartered investment advisor to long-term value-

focused private equity funds that invest solely in mining and mining-related companies.

Appian is a leading investment advisor in the metals and mining industry, with global experience

across South America, North America, Europe, Australia and Africa and a successful track record

of supporting companies to achieve their devel opment targets, with a global operating portfolio

overseeing nearly 5,000 employees. Appian has a global team of 60 experienced professionals

with presences in London, Toronto, Montreal, Vancouver, Lima, Belo Horizonte and Perth. The

Appian team, through its private equity funds, has a long history of successfully bringing mines

through development and into production, having completed 8 mine builds in the last 5 years.

For more information, please visit www.appianc apitaladvisory.com, or find us on LinkedIn,

Instagram and Twitter.

For further information on this press release, visit www.osiskometals.com or contact:

Robert Wares, Chairman & CEO of Osisko Metals Incorporated

Email: [email protected]

www.osiskometals.com

Cautionary Statement on Forward-Looking Information

This news release contains "forward-looking inform ation" within the meaning of applicable Canadian

securities legislation based on expectations, estimates and projections as at the date of this news release.

Any statement that involves predictions, expectations, interpretations, beliefs, plans, projections, objectives,

assumptions, future events or performance are not st atements of historical fact and constitute forward-

looking information. This news release may contain forward-looking information pertaining to the Pine Point

Project, including, among other things, the results of the PEA and the IRR, NPV and estimated costs,

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production, production rate and mine life; the expect ation that the Pine Point Project will be a robust

operation and profitable at a variety of prices and assumptions; the abilit y to identify additional resources

and reserves (if any) and exploit such resources and reserves on an economic basis; the expected high

quality of the Pine Point concentrate s; the potential impact of the Pine Point Project in the Northwest

Territories, including but not limited to the potential generation of tax revenue and contribution of jobs; the

Pine Point Project having the potential for mineral resource expansion and new discoveries; the timing and

ability for the Pine Point Project to reach construction decision; the estimated costs to take the Pine Point

Project to construction decision; the timing and ab ility to complete the Transaction on the terms

contemplated (if at all); the ability of the Company to realize on the benefit of the Transaction; and the

impact to the Company of the disposition of ownership interest and control in the Pine Point Project, which

is a material property of the Co mpany. There can be no certainty on t he timing, costs and ability for the

joint-venture parties to take the Pine Point Project to reach construction decision or pursue planned

exploration and development as presently contemplated.

Forward-looking information is not a guarantee of future performance and is based upon a number of

estimates and assumptions of management, in light of management's experience and perception of trends,

current conditions and expected developments, as we ll as other factors that management believes to be

relevant and reasonable in the circumstances, including, without limitation, assumptions about: favourable

equity and debt capital markets; the ability and timing for the parties to fund cash calls to advance the

development of the Pine Point Project and pursue pl anned exploration and development; the ability to

complete the Transactions in the timing and terms contemplated (if at all); the ability to satisfy or waive on

satisfactory terms any conditions to the completion of the Transaction (incl uding but not limited to, the

Exchange acceptance and shareholder appr oval of the Transaction); future prices of zinc and lead; the

timing and results of exploration and drilling programs; the accuracy of mineral resource estimates;

production costs; operating conditions being favourabl e; political and regulatory stability; the receipt of

governmental and third party approvals; licenses and permits being received on favourable terms;

sustained labour stability; stability in financial and capital markets; availability of equipment; the economic

viability of the Pine Point Project; and positive relations with local groups. Forward-looking information

involves risks, uncertainties and other factors that could cause act ual events, results, performance,

prospects and opportunities to differ materially from those expressed or implied by such forward-looking

information. Factors that could cause actual result s to differ materially fr om such forward-looking

information are set out in the Company's public documents filed at www.sedar.com. Although the Company

believes that the assumptions and fa ctors used in preparing the forward-lo oking information in this news

release are reasonable, undue reliance should not be placed on such information, which only applies as of

the date of this news release, and no assurance can be given that such events will occur in the disclosed

time frames or at all. The Company disclaims any in tention or obligation to update or revise any forward-

looking information, whether as a result of new inform ation, future events or otherwise, other than as

required by law.

Neither the Exchange nor its Regulation Services Provider (as that term is defined in the policies of

the Exchange) accept 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.