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PMET.TO ·

PMET Resources Invited to Participate in Prime Minister Carney’s Canada Investment Summit

Marketing Announcement

PMET Resources Inc.

Suite 900 - 1801 McGill College, Montreal, Qc, Canada, H3A 1Z4

www.pmet.ca / TSX: PMET / ASX: PMT / OTC: PMETF / FSE: R9GA

PMET Resources Invited to Participate in Prime Minister Carney’s

Canada Investment Summit

September 14, 2026 – Montreal, QC, Canada September 14, 2026 – Sydney, Australia

HIGHLIGHTS

• PMET Resources has been invited to participate in the Canada Investment Summit

on September 14 -15, 2026 , in Toronto, Canada, with its 100% -owned

Shaakichiuwaanaan critical minerals Project included in the Summit Prospectus.

• Shaakichiuwaanaan represents a strategic large-scale, globally relevant Canadian

critical minerals development opportunity, targeting to be one of the largest lithium

pegmatite mines in the world, with significant co-product opportunities (tantalum and

caesium).

• The Project’s co-products opportunities are supported by one of the largest tantalum

pegmatite resources in the world and the largest pollucite -hosted caesium pegmatite

resource in the world 1, both offering Canada the opportunity to re -write the current

respective supply chains of these minerals.

Ken Brinsden, President, CEO and Managing Director, comments: “The Canada Investment

Summit provides an important opportunity to showcase a selection of the most compelling

Canadian assets to some of the world’s leading pools of long-term capital. We believe

Shaakichiuwaanaan is exactly the type of project Canada is seeking to advance: large-scale,

located in a premier jurisdiction, supported by renewable hydroelectric power , and capable

of supplying several critical minerals into North American and allied supply chains.

“Its inclusion in the Summit’s prospectus provides another opportunity to engage with

institutional, strategic , and government -aligned partners as we continue to advance

Shaakichiuwaanaan toward a final investment decision.”

PMET Resources Inc. (the “Company” or “PMET”) (TSX: PMET) (ASX: PMT) (OTCQX:

PMETF) (FSE: R9GA) is pleased to announce its participation in the Canada Investment

1 Consolidated MRE (CV5 + CV13 pegmatites) totals 108.0 Mt at 1.40% Li 2O and 166 ppm Ta 2O5 (Indicated), and 33.4 Mt

at 1.33% Li2O and 155 ppm Ta2O5 (Inferred), at an Li2O cut-off grade of 0.40% (open-pit), 0.60% (underground CV5), and

0.70% (underground CV13). A grade constraint of 0.50% Cs 2O was used to model the Rigel and Vega caesium zones,

contained entirely within CV13, with a MRE of 0.69 Mt at 4.40% Cs2O (Indicated), and 1.70 Mt at 2.40% Cs2O (Inferred). The

Effective Date is June 20, 2025. Mineral Resources are not Mineral Reserves as they do not have demonstrated economic

viability. Mineral Resources are inclusive of Mineral Reserves.

Summit 2026, taking place September 14 and 15 in Toronto, Ontario, Canada, and the

inclusion of its 100%-owned Shaakichiuwaanaan Project in the Canada Investment Summit

Prospectus. The document highlights selected investment opportunities in Canada by the

government.

The summit, which will be hosted in Toronto on September 14 and 15, is a first-of-its-kind

national investment forum initiated by Canadian Prime Minister Mark Carney in

partnership with Canada Pension Plan Investment Board and Public Section Pension

Investment Board, two of Canada’s largest pension fund investors.

The Prime Minister has confirmed that investors participating in the summit collectively

manage more than $100 trillion in assets, which underscores the scale of the global

investment audience being convened in Canada. The Government of Canada has an

ambitious plan to catalyze $1 trillion in total investment in Canada over the next five years.

SHAAKICHIUWAANAAN - A LARGE-SCALE CANADIAN CRITICAL MINERALS

OPPORTUNITY

The Company’s October 2025 lithium -only Feasibility Study 2 for the CV5 Pegmatite

outlined an approximate 20-year mine life, with nominal production capacity of up to

~800,000 tonnes per annum of SC5.5 spodumene concentrate. The study estimated an

AISC of approximately US$597/t SC5.5 and an after -tax NPV8% of approximately C$1.6

billion using a long -term SC5.5 p rice assumption of US$1,221/t. See news release dated

October 20, 2025.

The Project is supported by strategic investments from global leaders in the lithium and

battery value chain. Volkswagen Group and Albemarle Corporation are among PMET’s

largest strategic shareholders. Volkswagen initially invested approximately C$69 million for

a 9.9% interest in 2024, while Albemarle invested approximately C$109 million for a 4.9%

interest in 2023. Volkswagen’s wholly-owned battery subsidiary, PowerCo SE, has entered

into a binding offtake term sheet for 100,000 tonnes per annum of SC5.5 spodumene

concentrate for 10 years, equivalent to approximately 12.5% of the Project’s nominal

aggregate ~800,000 tpa production capacity. Subject to a final investment decision, the

Company is targeting commercial production in 2030, with full scale production by 2032.

ADVANCING CANADIAN VALUE-ADDED PROCESSING AND CO-PRODUCTS

The Company continues to evaluate opportunities to capture additional value from

Shaakichiuwaanaan’s lithium, caesium, and tantalum endowment.

2 See Feasibility Study news release dated October 20, 2025. Probable Mineral Reserve cut -off grade is 0.40% Li 2O (open-

pit) and 0.70% Li2O (underground). Underground development and open-pit marginal tonnage containing material above

0.37% Li2O are also included in the statement. Effective Date of September 11, 2025.

The Company is preparing an updated CV5 lithium -tantalum Feasibility Study and a

parallel lithium-caesium-tantalum Preliminary Economic Assessment (PEA) covering

the broader CV5 and CV13 Project, both targeted for completion in Q4 2026.

Future value-add processing initiatives are also a key study focus for the company. They

would potentially enable capturing more downstream value from the raw materials at site,

reducing transportation costs and making Canada more sovereign in critical minerals.

For lithium processing , a recent Concept Study undertaken by the Company identified

Primero’s proprietary ALi® atmospheric leach process as a potential preferred pathway

for further evaluation, with bench-scale work successfully producing 99.8% battery -grade

lithium carbonate from Shaakichiuwaanaan spodumene concentrate (see news release,

June 14, 2026). The Company has also entered into a Memorandum of Understanding with

Mitsui & Co ., Ltd. and Microwave Chemical Co ., Ltd. to evaluate microwave -assisted

electric calcination technology, potentially leveraging Québec’s low -cost renewable

hydroelectricity to support the production of higher-value lithium products in Québec.

For potential downstream processing of caesium, the Company is working with Koch

Technology Solutions, part of Koch Inc., to evaluate proprietary processing pathways for

converting Shaakichiuwaanaan pollucite concentrates into higher-value caesium chemicals

(see news release, April 15, 2026). For this purpose the Company’s September 2026 large-

scale sampling program called “BerryPick” is targeting the collection of substantially larger

quantities of material to support further generation of pollucite concentrate for

downstream caesium chemical testwork.

PROJECT FINANCING ENGAGEMENT

The Company continues to advance its Project-financing strategy in parallel with technical

studies, permitting, and commercial development. A non-binding Letter of Interest has

been received from Société Générale (see news release June 3, 2026), which has expressed

interest in participating as a Mandated Lead Arranger for a potential debt financing

package. The Company has also received non -binding support and engagement from

Export Development Canada (“EDC”), KfW IPEX-Bank, and an additional major Canadian

government financial institution in connection with the potential financing of

Shaakichiuwaanaan (see news release May 19, 2026).

These expressions of interest and support are preliminary, non-binding , and conditional,

and do not constitute credit approvals, commitments to lend, or definitive financing

arrangements.

ABOUT TANTALUM

Tantalum is an essential component required for a range of high-tech devices, electronics,

superalloys, and essential niche applications including capacitors used in mobile phones

and other electronics. It has been recently part of the AI roll out with data centers which

has contributed to recent price increases. Due to these essential uses, tantalum is listed as

a critical and strategic mineral by the province of Quebec (Canada), Canada, European

Union, United Kingdom, Australia, Japan, India, South Korea, and the United States.

Tantalum is a unique, high -performance metal known for its high melting point,

exceptional corrosion resistance, and ability to efficiently store and transfer electrical

charge. High -growth and emerging applications of tantalum are being driven by both

technological innovation and strategic shifts in global industries. Emerging industry

applications include A.I.-focused GPUs and CPUs, advanced electronics and 5G

infrastructure, semiconductor manufacturing used in cloud computing. It’s also a key input

in medical technology including implants and medical imaging equipment, aerospace

including defense applications, and quantum computing.

According to the United States Geological Survey, an estimated 2,100 tonnes of tantalum

was produced globally in 2024. No significant amounts of tantalum are currently produced

in North America or Europe, with a majority (85%+) of production coming out of the

Democratic Republic of Congo, Rwanda, Nigeria, and Brazil. However, a significant amount

of global supply (~60%) comes out of certain African regions where serious conflict and

corruption are present with poor worker conditions. Growing tantalum production from

lithium pegmatites, predominantly out of Australia at this time, is seen as a source of

alternative, secure, stable, and traceable supply to global markets, while the USGS reported

no U.S. mine production.

Tantalum currently trades for $232/lb as a spot concentrate pricing per pound of contained

Ta₂O₅ (Ta ≥30%), per Shanghai Metals market reporting3.

ABOUT CAESIUM

Mineral deposits of pollucite-hosted caesium are very rare globally and represent the most

fractionated component of LCT pegmatite systems, which are effectively the only known

primary economic source of caesium supply. Economic deposits of caesium pegmatite are

typically on a smaller scale of <10 kt to 350 kt in size compared to deposits of lithium

pegmatite that typically range in the millions of tonnes in size (<10 Mt to over 100 Mt).

The market for caesium compounds and metals is niche and largely opaque because it is

not publicly traded like copper or gold, but rather through bi -lateral and term contracts.

Further, product prices vary depending on their contained caesium form, purity, and end -

product use. As an example, caesium carbonate (Cs 2CO3≥99%) as an indicative spot price

currently trades at around US$250/kg (excluding VAT, Price Sourcing – Shanghai Metal

3 Shanghai Metals Market (SMM), September 11, 2026: CIF China 30% Tantalum Ore Price Charts - Shanghai Metals

Market (SMM)

Markets4.

Caesium is currently supply constrained, with only limited sources supplying the global

market. A discovery at the size, grade, and scale of Shaakichiuwaanaan has the potential

to be a primary source of supply for global markets over the long -term. This in cludes

existing applications for caesium in oil/gas drilling (Caesium Fromate), medical imaging,

emissions reduction, atomic clocks and precision GPS navigation, as well as new and

potentially growing applications in the terrestrial solar panel industry. Caesium has been

found to play a vital role in significantly improving next gen eration solar panel efficiency,

stability, and life span. Additionally, the use of caesium in lithium-ion batteries to improve

performance is actively being explored through use as an additive in certain cathode,

anode, and electrolyte chemistries.

QUALIFIED/COMPETENT PERSON

The technical and scientific information in this news release that relates to the Mineral

Resource Estimate and exploration results for the Company’s properties is based on, and

fairly represents, information compiled by Mr. Darren L. Smith, M.Sc., P.Geo., who is a

Qualified Person as defined by National Instrument 43 -101 – Standards of Disclosure for

Mineral Projects (“NI 43 -101”), and member in good standing with the Ordre des

Géologues du Québec (Geologist Permit number 01968), and with the Association o f

Professional Engineers and Geoscientists of Alberta (member number 87868). Mr. Smith

has reviewed and approved the related technical information in this news release.

Mr. Smith is an Executive and Vice President of Exploration for PMET Resources Inc. and

holds common shares, Restricted Share Units (RSUs), Performance Share Units (PSUs), and

options in the Company.

The information in this news release that relates to the Mineral Reserve Estimate and

Feasibility Study is based on, and fairly represents, information compiled by Mr. Frédéric

Mercier-Langevin, Ing. M.Sc., who is a Qualified Person as defined by NI 43-101, and

member in good standing with the Ordre des Ingénieurs du Québec. Mr. Mercier-Langevin

has reviewed and approved the related technical information in this news release.

Mr. Mercier-Langevin is the Chief Operating and Development Officer for PMET Resources

Inc. and holds common shares, RSUs, PSUs, and options in the Company.

ABOUT PMET RESOURCES INC.

PMET Resources Inc. is a pegmatite critical mineral exploration and development company

focused on advancing its district-scale 100%-owned Shaakichiuwaanaan Property located

4 SSM publishes an indicative spot price for 99% caesium carbonate in China. Given the small and relatively opaque

nature of the global caesium market and the limited observable transaction volumes traded on SMM, the SMM

should be regarded as an indicative market reference rather than a directly achievable price for PMET’s potential

caesium products.

in the Eeyou Istchee James Bay region of Quebec, Canada, which is accessible year -round

by all-season road and proximal to regional hydro-power infrastructure.

In late 2025, the Company announced a positive lithium-only Feasibility Study on the CV5

Pegmatite for the Shaakichiuwaanaan Property and declared a maiden Mineral Reserve of

84.3 Mt at 1.26% Li 2O (Probable)5. The study outlines the potential for a competitive and

globally significant high -grade lithium project targeting up to ~800 ktpa spodumene

concentrate using a simple Dense Media Separation (“DMS”) only process flowsheet.

Further, the results highlight Shaakichiuwaanaan as a potential North American critical

mineral powerhouse with significant opportunity for tantalum and caesium in addition to

lithium.

The Project hosts a Consolidated Mineral Resource 6 totalling 108.0 Mt at 1.40% Li 2O and

166 ppm Ta2O5 (Indicated) and 33.4 Mt at 1.33% Li 2O and 155 ppm Ta 2O5 (Inferred), and

ranks as a top ten lithium pegmatite globally in size. Additionally, the Project hosts the

world’s largest pollucite-hosted caesium pegmatite Mineral Resource at the Rigel and Vega

zones with 0.69 Mt at 4.40% Cs2O (Indicated), and 1.70 Mt at 2.40% Cs2O (Inferred).

This news release has been approved by

“KEN BRINSDEN”

Kenneth Brinsden, President, CEO & Managing Director

Olivier Caza-Lapointe

Head, Investor Relations

T: +1 (514) 913-5264

E: [email protected]

DISCLAIMER FOR FORWARD-LOOKING INFORMATION

This news release contains “forward -looking statements” and “forward-looking

information” within the meaning of applicable securities laws.

All statements, other than statements of present or historical facts, are forward-looking

statements. Forward-looking statements involve known and unknown risks, uncertainties

and assumptions and accordingly, actual results could differ materially from tho se

expressed or implied by such statements. You are hence cautioned not to place undue

reliance on forward -looking statements. Forward-looking statements are typically

5 See Feasibility Study news release dated October 20, 2025. Probable Mineral Reserve cut-off grade is 0.40% Li2O (open-

pit) and 0.70% Li2O (underground). Underground development and open-pit marginal tonnage containing material above

0.37% Li2O are also included in the statement. Effective Date of September 11, 2025.

6 Consolidated MRE (CV5 + CV13 pegmatites) is reported at an Li2O cut-off grade of 0.40% (open-pit), 0.60%

(underground CV5), and 0.70% (underground CV13). A grade constraint of 0.50% Cs2O was used to model the Rigel and

Vega caesium zones, contained entirely within CV13. The Effective Date is June 20, 2025. Mineral Resources are not

Mineral Reserves as they do not have demonstrated economic viability. Mineral Resources are inclusive of Mineral

Reserves.

identified by words such as “potential”, “advance”, “advancing”, “targeting”, “opportunity”,

“expected”, “continue”, “development”, “completion”, “support”, “engage”, “could”, “may”,

“would”, “might” or “will”, or variations of such words and phrases.

Forward-looking statements include, but are not limited to, statements concerning the

potential benefits arising from participation in the Canada Investment Summit and

inclusion of the Shaakichiuwaanaan Project in the Summit investment deal book; the

development, production and economic potential of the Shaakichiuwaanaan Project; the

Primero, Mitsui, Microwave Chemical Co., Ltd. and Koch Technology Solutions initiatives;

potential lithium, tantalum and caesium co -product and downstream opportunities; the

updated CV5 lithium -tantalum Feasibility Study and parallel lithium -caesium-tantalum

PEA/Scoping Study on the broader Project; future project financing and the non-binding

interest or support of Société Générale, EDC, KfW IPEX -Bank and other prospective

financing partners; and the timing and potential achievement of a final investment

decision.

Forward-looking statements are based upon certain assumptions and other important

factors that, if untrue, could cause actual results to be materially different from future

results expressed or implied by such statements. There can be no assurance that forward-

looking statements will prove to be accurate. Key assumptions include, without limitation,

the accuracy of Mineral Resource and Mineral Reserve estimates and the assumptions on

which they are based; the ability to complete ongoing technical studies an d testwork as

planned; the ability to achieve expected recoveries, product specifications and

development outcomes; long-term demand for lithium, tantalum and caesium; the ability

to obtain all required regulatory approvals; the availability of financing o n acceptable

terms; and that exploration and development results continue to support management’s

current plans for the Project.

Forward-looking statements are also subject to risks and uncertainties facing the

Company’s business, any of which could have a material adverse effect on the Company’s

business, financial condition, results of operations and growth prospects. Readers should

review the detailed risk discussion in the Company’s most recent Annual Information Form

filed on SEDAR+, for a fuller understanding of the risks and uncertainties that affect the

Company’s business and operations.

Although the Company believes its expectations are based upon reasonable assumptions

and has attempted to identify important factors that could cause actual actions, events or

results to differ materially from those described in the forward-looking stateme nts, there

may be other factors that cause actions, events or results not to be as anticipated,

estimated or intended. There can be no assurance that forward-looking information will

prove to be accurate. If any of the risks or uncertainties mentioned abov e, which are not

exhaustive, materialize, actual results may vary materially from those anticipated in the

forward-looking statements.

The forward-looking statements contained herein are made only as of the date hereof. The

Company disclaims any intention or obligation to update or revise any forward-looking

statements, whether as a result of new information, future events or otherwise, e xcept to

the extent required by applicable law. The Company qualifies all of its forward-looking

statements by these cautionary statements.

COMPETENT PERSON STATEMENT (ASX LISTING RULES)

The information in this news release that relates to the Feasibility Study (“FS”) for the

Shaakichiuwaanaan Project, which was first reported by the Company in a market

announcement titled “PMET Resources Delivers Positive CV5 Lithium-Only Feasibility Study

for its Large-Scale Shaakichiuwaanaan Project” dated October 20, 2025 (Montreal time), is

available on the Company’s website at www.pmet.ca, on SEDAR+ at www.sedarplus.ca and

on the ASX website at www.asx.com.au. The production target and forecast financial

information from the Feasibility Study referred to in this news release was reported by the

Company in accordance with ASX Listing Rule s 5.16 and 5.17 on the date of the original

announcement. The Company confirms that, as of the date of this news release, all material

assumptions and technical parameters underpinning the production target and forecast

financial information in the original announcement continue to apply and have not

materially changed.

The Mineral Resource and Mineral Reserve Estimates in this release were first reported by

the Company in accordance with ASX Listing Rule s 5.8 and 5.9 in market announcements

titled “World’s Largest Pollucite -Hosted Caesium Pegmatite Deposit” dated July 20, 2025

(Montreal time) and “PMET Resources Delivers Positive CV5 Lithium-Only Feasibility Study

for its Large -Scale Shaakichiuwaanaan Project” dated Oc tober 20, 2025 (Montreal time)

and are available on the Company’s website at www.pmet.ca, on SEDAR+ at

www.sedarplus.ca and on the ASX website at www.asx.com.au. The Company confirms that,

as of the date of this news release, it is not aware of any new information or data verified

by the competent person that materially affects the information included in the relevant

announcement and that all material assumptions and technical parameters underpinning

the estimates in the relevant announcement continue to a pply and have not materially

changed. The Company confirms that, as at the date of this announcement, the form and

context in which the competent person’s findings are presented have not been materially

modified from the original market announcement.