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Ucore Secures Additional US$4.6 Million from U.S. Department of War to Advance Samarium and Gadolinium Refining Expanded RapidSX™ program supports critical defense supply chains amid heightened interest from Washington Ucore announces:

Exploration Programs

Ucore Secures Additional US$4.6 Million from

U.S. Department of War to Advance Samarium

and Gadolinium Refining

Expanded RapidSX™ program supports critical defense supply chains amid

heightened interest from Washington

Ucore announces:

• Additional US$4.6 million Other Transaction Agreement ("OTA") for expanding the

first RapidSX ™ Enhanced Machine A in Louisiana, bringing the total OTA grant

funding to US$27.0 million

• Expanding samarium and gadolinium process development in Kingston, for

Enhanced Machine A deployment in Louisiana

• Ucore reports heightened interest from Washington on Samarium and Gadolinium

development.

Halifax, Nova Scotia – September 14, 2026 - Ucore Rare Metals Inc. (TSXV: UCU | OTCQX:

UURAF) (“Ucore” or the “Company”) is pleased to report the execution of a US$4.6 million

Other Transaction Agreement (" OTA") Modification from the U.S. Department of War

(“DoW”) to expand its RapidSX ™ rare earth separation program. The additional funding

supports samarium (“ Sm”) and gadolinium (“ Gd”) process development and the

deployment of Enhanced Machine A at Ucore’s planned Louisiana Strategic Metals Complex

(“SMC”) in Alexandria.

This latest award advances work on two materials that the U.S. government has identified as

priorities for strengthening domestic critical mineral supply chains. Ucore is deploying

separation capabilities intended to address those needs as sourcing requirements tighten.

“We are seeing heightened interest from Washington in the role Ucore can play in

securing critical rare earth supplies,” stated Pat Ryan, P .Eng., Chairman and CEO of

Ucore. “We have optimized our commercial equipment configurations, strengthened

our financial position, and now secured additional DoW funding for an expanded

program. The dots are connecting around a clear national need: the ability to separate

the materials that U.S. defense and industrial supply chains depend on.”

A growing priority for defense supply chains

Sm is a key input for samarium-cobalt magnets used in demanding defense and aerospace

applications where magnetic performance at high temperatures is essential. Gd has

specialized coatings, electronics, and nuclear applications, including neutron absorption in

nuclear reactors. Both were identified by the U.S. Geological Survey among the mineral

commodities with the highest supply-chain risks in its 2025 assessment.

China’s April 2025 export controls included samarium - and gadolinium -related metals,

oxides, and compounds. In February 2026, the Defense Industrial Base Consortium

(“DIBC”) issued a U.S. government request for projects addressing domestic production

gaps across 13 critical minerals, including both Sm and Gd. Separation and processing were

among the capabilities specifically sought.

The procurement requirements are also tightening. Effective January 1, 2027, applicable

Defense Federal Acquisition Regulation Supplement (“DFARS”) restrictions for samarium -

cobalt and neodymium -iron-boron magnets extend across their upstream supply chains,

including mining, refining , and separation in covered countries such as China, subject to

specified exceptions and nonavailability determinations. Ucore believes these

requirements increase the importance of qualifying dependable processing sources outside

covered countries.

Ucore’s role is at the separation stage, where mixed rare earth feedstocks must be divided

into individual rare earth oxide products suitable for industrial use or further downstream

processing. Building that capability is a necessary part of connecting mineral supply with

oxide, metal, alloy and/or magnet manufacturing.

Additional funding advances the next stage

The new award increases funding for Phase 2 of Ucore’s Rare Earth Separation Technology

Capabilities Prototype Project from US$18.4 million to US$23.0 million . Including the

original US$4.0 million Phase 1 award , total grant funding under the Company’s OTA with

U.S. Army Contracting Command-Orlando increases to US$27.0 million.

Building Momentum Toward Commercial Deployment

The additional DoW support follows a series of advances across Ucore’s commercialization

program. In June, the Company shipped NdPr oxide qualification samples to major magnet

manufacturers. In July, it announced production of 99.9% dysprosium oxide , which it has

since shipped for customer qualifications . These steps support the development of future

commercial relationships for Ucore’s broader rare earth product platform.

In August, Ucore completed its RapidSX ™ contactor scale-up program following more than

400 optimization tests and closed a public offering raising approximately C$69 million in

gross proceeds. The financing’s net proceeds are intended for Louisiana SMC development,

working capital, and general corporate purposes.

The expanded DoW program connects that technical progress and stronger financial

position to a specific strategic need. Ucore is advancing the separation capabilities intended

to turn reliable feedstock sources into a North American supply of the rare eart h products

manufacturers require.

# # #

About Ucore Rare Metals Inc.

Ucore is focused on rare -earth 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 Rare Earth Elements (“ 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 Heav y 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, including without limitation

statements with respect to: the progress of development at the Louisiana SMC and any

subsequent SMCs; and future development plans. 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 Company’s Commercialization and Demonstration Facility (“CDF”) and the

aforementioned projects (generally), see the risk disclosure in the Base Shelf Prospectus

and the Prospectus Supplement, and in the continuous disclosure documents filed by the

Company on SEDAR+ ( http://www.sedarplus.ca), including the Company’s annual

information form for the year ended December 31, 2025 (filed on SEDAR+ on June 8, 2026)

and MD&A for Q2-2026 (filed on SEDAR+ on August 26, 2026), 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 technical report in compliance with National Instrument 43-101 – Standards

of Disclosure for Mineral Projects 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 agr eements. 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

engineering, 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 acceptable

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, includin g 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 re alized.

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, construction, 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

Michael Schrider, P .E., Ucore Vice President and Chief Operating 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]