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NOA Engages Hatch To Lead Process Development Study To Support Upcoming PFS At Rio Grande Project

Corporate Updates

NOA Engages Hatch To Lead Process Development Study To Support

Upcoming PFS At Rio Grande Project

May 5, 202 5, Buenos Aires, Argentina – NOA Lithium Brines Inc. (TSXV:NOAL |

Frankfurt:N7N) (“NOA” or the “Company”) is pleased to announce the appointment of Hatch

Limited (“Hatch”) to lead Process Development Study (“Study”) for the Company’s flagship

Rio Grande Project (the “ Project”) in Salta Province, Argentina. Hatch is a global

multidisciplinary project management, engineering and professional services consultancy

with extensive experience in critical minerals and has substantial experience in processing

and engineering of lithium rich brines, including projects located on salars in Argentina.

The objective of the Study is to compare the Project’s baseline evaporation pond flowsheet

against alternative process configurations incorporating direct lithium extraction (“ DLE”)

technology. The Study is expected to be completed in two stages: (i) DLE testwork and

evaluation, and (ii) development of concept-level process design and operating parameters

to enable comparison of alternative flowsheets. The Study is intended to inform the scope

and design basis for NOA’s upcoming preliminary feasibility study (“PFS”).

The Study is expected to be completed within the next three months, subject to testwork

progress and results, with findings anticipated in Q3 2026. The results are expected to

provide insights into potential process optimization opportunities and development flexibility

for the Project, and to support a robust PFS design basis.

NOA’s Chief Executive Officer Gabriel Rubacha states: “This marks another step to get to

Rio Grande’s PFS. This study will help us evaluate process alternatives and refine our

development pathway for Rio Grande ahead of the PFS. Hatch brings deep experience in

lithium brine processing, and the results will support a more robust PFS design basis.”

About NOA Lithium Brines Inc.

NOA is a lithium exploration and development company formed to acquire assets with

significant resource potential. All NOA’s projects are located in the heart of the prolific

Lithium Triangle, in the mining -friendly province of Salta, Argentina, near a mul titude of

projects and operations owned by some of the largest players in the lithium industry. NOA

has rapidly consolidated one of the largest lithium brine claim portfolios in this region that is

not owned by a producing company, with key positions on th ree prospective salars, being

Rio Grande, Arizaro, and Salinas Grandes, and totalling over 140,000 hectares. The Rio

Grande Project is NOA's flagship asset, with a resource estimate of approximately 4.7 million

tons of lithium carbonate equivalent (LCE) at an average lithium concentration of 525

NEWS RELEASE

milligrams per litre. In December 2024, NOA completed final property payments on its Rio

Grande Project, securing 100% ownership of all claims within this project.

About Hatch Limited

Hatch is a global engineering, project delivery, and professional services firm. With seven

decades of business and technical experience in the mining, energy, and infrastructure

sectors, Hatch knows the business and understands that challenges are changing rapidly.

Hatch responds quickly with solutions that are smarter, more efficient, and innovative. Hatch

draws upon an 11,000 staff with experience in over 150 countries to challenge the status

quo and create positive change for its clients, its employees, and the communities they

serve.

Find out more on www.hatch.com

On Behalf of the Board of Directors,

Gabriel Rubacha

Chief Executive Officer and Director

For Further Information

Website: www.noalithium.com

Email: [email protected]

Telephone: +54-9-11-5060-4709

Alternative Telephone: +1-403-571-8013

Cautionary Note Regarding Forward-Looking Statements

This news release contains forward -looking statements and other statements that are not historical facts.

Forward-looking statements are often identified by terms such as “will”, “may”, “should”, “anticipate”, “expects”

and similar expressions. All stateme nts other than statements of historical fact, included in this news release

are forward-looking statements that involve risks and uncertainties. There can be no assurance that such

statements will prove to be accurate and actual results and future events c ould differ materially from those

anticipated in such statements. Important factors that could cause actual results to differ materially from the

Company’s expectations include the results of further brine process testing and exploration and other risks

detailed from time to time in the filings made by the Company with securities regulators. The reader is

cautioned that assumptions used in the preparation of any forward -looking information may prove to be

incorrect. Events or circumstances may cause actual results to differ materially from those predicted, as a

result of numerous known and unknown risks, uncertainties, and other factors, many of which are beyond the

control of the Company. The reader is cautioned not to place undue reliance on any forward -looking

information. Such information, although considered reasonable by management at the time of preparation,

may prove to be incorrect and actual results may differ materially from those anticipated. Forward -looking

statements contained in this news relea se are expressly qualified by this cautionary statement. The forward -

looking statements contained in this news release are made as of the date of this news release and the

Company will update or revise publicly any of the included forward -looking statements as expressly required

by applicable law.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is

defined in policies of the TSX Venture Exchange) accepts responsibility for the

adequacy or accuracy of this release. No securities regulatory authority has reviewed

nor accepts responsibility for the adequacy or accuracy of the content of this news

release.