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Ucore Rare Metals and Sumitomo Corporation of Americas Announce Strategic Collaboration in Rare Earth Supply Chain

Corporate Updates

Ucore Rare Metals and Sumitomo Corporation of

Americas Announce Strategic Collaboration in

Rare Earth Supply Chain

Halifax, Nova Scotia, June 15, 2026 - Ucore Rare Metals Inc. (TSXV: UCU | OTCQX:

UURAF) (“ Ucore” or the “ Company”) is pleased to announce a strategic cooperation

framework with Sumitomo Corporation of Americas (“SCOA”) to support the development

of a diversified rare earth supply chain across North America and allied markets.

Under the Agreement, signed on June 10, 2026, the companies will collaborate on sourcing

rare earth feedstock for Ucore’s Louisiana Strategic Metals Complex (SMC) and downstream

offtake development for separated rare earth products. The focus is on selected middle and

heavy rare earth elements critical to high-performance magnets and advanced materials

applications primarily in Japan while preserving feedstock for additional processing for North

American and allied markets.

The collaboration is intended to combine Ucore’s developing RapidSX™ technology platform

at its Louisiana (“SMC”) rare earth refinery with SCOA’s global sourcing, logistics, and market

access capabilities, including in Japan, as the parties work to support more diversified rare

earth supply chains. Furthermore, the companies intend to formally cooperate as project

partners in Ucore’s previously announced Global Partnership Initiative with the Government

of Canada.

Ucore is advancing its rare earth processing platform in North America, including the

development of its planned SMC in Louisiana and continued commercial demonstration with

the Government of Canada. SCOA has longstanding experience in the global rare earth

industry, including sourcing, trading, and supply chain development.

As part of the framework, SCOA will serve as Ucore’s distribution partner for designated

separated rare earth products sold to selected customer segments in Japan and other

mutually agreed industrial applications.

The companies will work together to explore opportunities for cooperation across the rare

earth value chain, subject to mutually agreed commercial terms and existing business

arrangements.

# # #

About Ucore Rare Metals Inc.

Ucore is focused on rare- and critical-metal resources, extraction, beneficiation, and

separation technologies with the potential for production, growth, and scalability. Ucore’s

vision and plan is to become a leading advanced technology company, providing best-in-class

metal separation products and services to the mining and mineral extraction industry.

Through strategic partnerships, Ucore aims to support the development of a more diversified

and resilient North American REE supply chain through the near-term development of a heavy

and light rare-earth processing facility in the US State of Louisiana, subsequent SMCs in

Canada and Alaska and the longer-term development of Ucore’s 100% controlled Bokan-

Dotson Ridge Rare Heavy REE Project on Prince of Wales Island in Southeast Alaska, USA

(“Bokan”).

Ucore is listed on the TSXV under the trading symbol “UCU” and in the United States on the

OTC Markets’ OTCQX® Best Market under the ticker symbol “UURAF.”

For further information, please visit www.ucore.com.

Forward-Looking Statements

This press release contains “forward-looking information” and “forward-looking statements”

(collectively “forward-looking statements” within the meaning of applicable Canadian

securities laws. All statements in this release (other than statements of historical facts) that

address future business development, technological development and/or acquisition activities

(including any related required financings), timelines, events, or developments that the

Company is pursuing are forward-looking statements. Although the Company believes the

expectations expressed in such forward-looking statements are based on reasonable

assumptions, such statements are not guarantees of future performance or results, and actual

results or developments may differ materially from those in forward-looking statements.

For additional risks and uncertainties regarding the Company, its business activities, its ability

to qualify for and receive any additional funding from any U.S. or Canadian government, the

CDF and the aforementioned projects (generally), see the risk disclosure in the Company’s

MD&A for Q1-2026 (filed on SEDAR+ on May 29, 2026) ( www.sedarplus.ca) as well as the

risks described below.

Regarding the disclosure above in the “About Ucore Rare Metals Inc.” section, the Company

has assumed that it will be able to procure or retain additional partners and/or suppliers, in

addition to Innovation Metals Corp. (“ IMC”), as suppliers for Ucore’s expected future SMCs.

Ucore has also assumed that sufficient external funding will be found to continue and

complete the ongoing research and development work required at the CDF and also later

prepare a new National Instrument 43-101 technical report that demonstrates that Bokan is

feasible and economically viable for the production of both REE and co-product metals and

the then prevailing market prices based upon assumed customer offtake agreements. Ucore

has also assumed that sufficient external funding will be secured to continue the development

of the specific engineering plans for the SMCs and their construction and eventual

commissioning and operations.

Forward-looking statements are based on a number of material assumptions, including,

without limitation: the successful completion and accuracy of baseline, front-end-engineering

design and detailed engineering studies; the ability to complete further engi neering,

procurement, and construction activities as currently contemplated; the availability, cost, and

timely delivery of equipment, materials, utilities, labour and construction services; the

Company’s ability to secure sufficient financing on acceptabl e terms; the receipt and timing

of all required permits and approvals; the successful scale-up and commercial deployment of

RapidSX™ technology from demonstration to commercial operation; the availability of

qualified feedstock from third- party suppliers; successful customer qualification and offtake

discussions; continued support from governmental partners; and general economic, marke t,

and industry conditions, including assumptions regarding rare earth oxide prices, which are

subject to significant volatility..

Although the Company believes that the assumptions underlying the forward-looking

information are reasonable, there can be no assurance that such assumptions will prove to

be accurate or that the anticipated results, performance, or achievements will be realized.

Actual results may differ materially from those expressed or implied by the forward-looking

information.

Factors that could cause actual results to differ materially include, without limitation: risks

associated with the development, scale-up, and commercialization of new or unproven

technologies; the risk that RapidSX ™ may not perform at commercial scale as expected;

engineering design changes; inaccuracies in capital or operating cost estimates; cost

escalation due to inflation, supply chain disruption, or market conditions; delays or failures in

procurement, construct ion, or commissioning; the inability to obtain or maintain required

permits, approvals, or regulatory authorizations; challenges in securing adequate financing;

adverse capital market conditions; variability in feedstock supply, quality, or pricing; failure to

secure or maintain commercial relationships, customer qualification, or offtake arrangements;

fluctuations and uncertainty in rare earth oxide prices and demand; the risk that indicative or

quoted market prices, including for ex-China markets, may not be realized; operational risks

once in production, including equipment failures or lower-than- expected recoveries;

geopolitical risk; changes in applicable laws or regulations; environmental or permitting

challenges; loss of key personnel; and general economic, business, or competitive

conditions.

Neither the TSXV nor its Regulation Services Provider (as that term is defined by the TSXV)

accept responsibility for the adequacy or accuracy of this release.

CONTACTS

Mr. Peter Manuel, Ucore Vice President and Chief Financial Officer, is responsible for

the content of this news release and may be contacted at 1.902.482.5214.

For additional information, please contact:

Mark MacDonald

Vice President, Investor Relations

Ucore Rare Metals Inc.

1.902.482.5214

[email protected]