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Ucore Demonstrates the Flexibility of RapidSX™ by Producing 99.5% NdPr from Multiple Sources Ucore announces:

Corporate Updates

Ucore Demonstrates the Flexibility of RapidSX™ by

Producing 99.5% NdPr from Multiple Sources

Ucore announces:

• It has produced 99. 5% NdPr sample material from two different feedstock sources (ionic

clay and bastnaesite) at its Commercialization and Demonstration Facility (“CDF”) in

Kingston, Ontario, for ongoing and planned customer qualifications

• NdPr is a fundamental product of most rare earth processing faciliti es, and on a scale of

tonnes, Ucore has now demonstrated the ability to create 99.5% material from multiple

sources with widely varying rare earth element compositions

Halifax, Nova Scotia – August 20 , 2026 - Ucore Rare Metals Inc. (TSXV: UCU | OTCQX: UURAF)

(“Ucore” or the “Company”) is pleased to announce that it has produced 99.5% NdPr from a second

feedstock source at its Commercialization and Demonstration Facility (“CDF”) in Kingston, Ontario, for

ongoing and planned customer qualifications:

• The first batch of 99.5% NdPr material was processed from approximately two tonnes of

Vietnamese mixed rare earth oxide (“MREO”) derived from ionic clay source material and sent

to Western NdFeB magnet makers for product testing in Q2-2026;

• The second batch of 99.5% NdPr material was produced in early August 2026 and was

processed from approximately five tonnes of mixed rare earth carbonate (“ MREC”) derived

from North American bastnaesite source material.

Ucore continues to demonstrate the versatility and adaptiveness of its RapidSX™ technology platform

in the simulated commercial environment of its Kingston CDF. NdPr is a fundamental product of most

rare earth processing facilities. It will be a featured product along with samarium (Sm), gadolinium

(Gd), terbium (Tb), dysprosium (Dy) , and eventually yttrium (Y) within the developing Louisiana

Strategic Metals complex (“ SMC”). On a tonnes-of-processing scale, the Company has now

demonstrated the production of 99.5% NdPr material from multiple sources with widely varying rare

earth element (“REE”) compositions.

The 7,400+ hours of simulated commercial runtime and corresponding commercial scale-up work at

the CDF have demonstrated the potential of the computerized and patent -pending RapidSX™

technology platform for full-scale REE processing. The chemistry of RapidSXTM is the same as that of

conventional solvent extraction. As a result, as demonstrated in over 16,000 comparative test results,

RapidSXTM typically yields recovery rates and target product purities equal to, or better than

conventional solvent extraction; the only difference being faster processing throughput and a smaller

equipment footprint for the same processing capacity. Together, these attributes have the potential

to create multiple opportunities for commercial savings and efficiencies, which Ucore is incorporating

into its developing Louisiana SMC.

Figure 1 - The RapidSX™ Demo Plant Machine at the Kingston CDF

“Ucore is executing a very deliberate plan for the development of its first RapidSX™ production

‘Machine A’ at the Louisiana SMC ,” stated Mike Schrider, P .E., Ucore’s Vice President and

Chief Operating Officer. “The work done at the CDF directly supports and validates the SMC

engineering program while simultaneously demonstrating the effectiveness of the technology

platform. Our work in Kingston will continue to serve as a co -commissioning, technology

development and training center to support and de-risk our commercial endeavors.”

# # #

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, products to be produced at the Louisiana SMC , or developments that the Company i s

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.

Forward-looking statements in this release include, without limitation, statements regarding the

development or execution of definitive supply , offtake agreements or other commercial agreements; the

acceptability of rare earth oxide samples to magnet makers and other end users of product; the ability to

provide high-purity materials or on-spec product to customers on an on-going basis; and the acceptability

of the referenced samples to potential customers.

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 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

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 sp ecific 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, 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 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, constructi on, 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]