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IsoEnergy Announces Results Following Annual General Meeting of Shareholders

Shareholder Meetings

IsoEnergy Announces Results Following Annual General Meeting of Shareholders

Toronto, ON, June 25, 2025 – IsoEnergy Ltd. (“IsoEnergy” or the “Company”) (NYSE American:

ISOU; TSX: ISO) is pleased to announce that shareholders of the Company (“Shareholders”) have

approved all matters brought before the annual general meeting of Shareholders (the “Meeting”)

held virtually today, as outlined in the management information circular of the Company dated

May 9, 2025 (the “Circular”) prepared in connection with the Meeting.

A total of 30,745,294 common shares of the Company, representing 63.95% of the issued and

outstanding shares of the Company as at the record date were represented in person or by proxy

at the Meeting.

The complete voting results from the Meeting are as follows:

1. Election of Directors

Each of the six nominees listed in the Circular were elected to hold office until the next annual

meeting of Shareholders or until his successor is duly elected or appointed. Proxies were

tabulated as follows:

Name of Nominee Votes

FOR

% Votes

FOR

Votes

WITHHELD

% Votes

WITHHELD

Philip Williams 28,340,428 98.75% 358,434 1.25%

Richard Patricio 23,008,311 80.17% 5,690,553 19.83%

Leigh Curyer 28,672,931 99.91% 25,932 0.09%

Christopher McFadden 28,217,466 98.32% 481,398 1.68%

Peter Netupsky 28,312,966 98.66% 385,897 1.34%

Mark Raguz 26,196,248 91.28% 2,502,615 8.72%

2. Appointment of Auditor

KPMG LLP was re-appointed as auditor of the Company until the close of the next annual meeting

of Shareholders at a remuneration to be fixed by the Board of Directors of the Company. Proxies

were tabulated as follows:

Votes FOR % Votes FOR Votes WITHHELD % Votes WITHHELD

30,737,426 99.97% 7,868 0.03%

About IsoEnergy Ltd.

IsoEnergy (NYSE American: ISOU; TSX: ISO) is a leading, globally diversified uranium company with

substantial current and historical mineral resources in top uranium mining jurisdictions of Canada,

the U.S. and Australia at varying stages of development, providing near-, medium- and long-term

leverage to rising uranium prices. IsoEnergy is currently advancing its Larocque East project in

Canada’s Athabasca basin, which is home to the Hurricane deposit, boasting the world’s highest-

grade indicated uranium mineral resource. IsoEnergy also holds a portfolio of permitted past -

producing, conventional uranium and vanadium mines in Utah with a toll milling arrangement in

place with Energy Fuels. These mines are currently on standby, ready for rapid restart as market

conditions permit, positioning IsoEnergy as a near-term uranium producer .

For further information, please contact:

Philip Williams

CEO and Director

[email protected]

1-833-572-2333

X: @IsoEnergyLtd

www.isoenergy.ca

Cautionary Statement Regarding Forward-Looking Information

This press release contains “forward -looking information” within the meaning of applicable

Canadian securities legislation and “forward- looking statements” within the meaning of U.S.

securities laws (collectively, “forward -looking statements”). Generally, forward-looking

statements can be identified by the use of forward-looking terminology such as “plans”, “expects”

or “does not expect”, “is expected”, “budget”, “scheduled”, “estimates”, “forecasts”, “intends”,

“anticipates” or “does not anticipate”, or “believes”, or variations of such words and phrases or

state that certain actions, events or results “may”, “could”, “would”, “might” or “will be taken”,

“occur” or “be achieved”. These forward- looking statements may relate to the Company’s

properties, including increased demand for and interest in nuclear power and uranium; and any

other activities, events or developments that the Company expects or anticipates will or may occur

in the future.

Forward-looking statements are necessarily based upon a number of assumptions that, while

considered reasonable by management at the time, are inherently subject to business, market

and economic risks, uncertainties and contingencies that may cause actual results, performance

or achievements to be materially different from those expressed or implied by forward- looking

statements. Such assumptions include, but are not limited to, assumptions that the results of

planned exploration and development activities are as anticipated; the anticipated mineralization

of IsoEnergy’s projects being consistent with expectations and the potential benefits from such

projects and any upside from such projects; the price of urani um; that general business and

economic conditions will not change in a materially adverse manner; that financing will be

available if and when needed and on reasonable terms; and that third party contractors,

equipment and supplies and governmental and other approvals required to conduct the

Company’s planned activities will be available on reasonable terms and in a timely manner.

Although IsoEnergy has attempted to identify important factors that could cause actual results to

differ materially from those contained in forward-looking statements, there may be other factors

that cause results not to be as anticipated, estimated or intended. There can be no assurance that

such statements will prove to be accurate, as actual results and future events could diffe r

materially from those anticipated in such statements. Accordingly, readers should not place undue

reliance on forward-looking statements.

Such statements represent the current views of IsoEnergy with respect to future events and are

necessarily based upon a number of assumptions and estimates that, while considered reasonable

by IsoEnergy, are inherently subject to significant business, economic, competitive, political and

social risks, contingencies and uncertainties. Risks and uncertainties include, but are not limited

to the following: negative operating cash flow and dependence on third party financing;

uncertainty of additional financing; no known mineral reserves; aboriginal title and consultation

issues; reliance on key management and other personnel; actual results of exploration activities

being different than anticipated; changes in exploration programs based upon results; availability

of third party contractors; availability of equipment and supplies; failure of equipment to operate

as anticipated; accidents, effects of weather and other natural phenomena; other environmental

risks; changes in laws and regulations; regulatory determi nations and delays; stock market

conditions generally; demand, supply and pricing for uranium; other risks associated with the

mineral exploration industry; and general economic and political conditions in Canada, the United

States and other jurisdictions where the Company conducts business. Other factors which could

materially affect such forward-looking statements are described in the risk factors in IsoEnergy’s

most recent annual management’s discussion and analysis and annual information form and

IsoEnergy’s other filings with securities regulators which are available under the Company’s

profile on SEDAR+ at www.sedarplus.ca and on EDGAR at www.sec.gov. IsoEnergy does not

undertake to update any forward- looking statements, except in accordance with appli cable

securities laws.