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ERD.TO ·

Erdene Completes Share Consolidation

Corporate Actions

TSX: ERD | MSE: ERDN | OTCQB: ERDCF

www.erdene.com 1 [email protected]

ERDENE COMPLETES SHARE CONSOLIDATION

Press Release

Halifax, Nova Scotia

2025.09.02

Erdene Resource Development Corp. (TSX:ERD; MSE:ERDN ; OTCQB: ERFCF)

("Erdene" or the "Company") is pleased to announce that further to its news release

dated August 25, 2025, the Company has completed the consolidation (the

“Consolidation”) of its issued and outstanding common shares (the "Common Shares")

on the basis of one (1) post -Consolidation Common Share for every six (6) pre-

Consolidation Common Shares. The Consolidation has reduced the number of issued

and outstanding Common Shares from 366,351,958 Common Shares to 61,063,549

Common Shares, effective September 2, 2025. As previously announced, no fractional

Common Shares were issued in connection with the Consolidation and fractional

Common Shares resulting from the Consolidation were rounded up to the nearest whole

Common Share.

The Common Shares are expected to begin trading on the Toronto Stock Exchange (the

“TSX”) on a post-Consolidation basis at markets open on September 5, 2025 and on the

Mongolian Stock Exchange (the “MSE”) during the week of September 8, 2025. Trading

of the Common Shares will remain halted on the MSE until trading begins on a post-

Consolidation basis. The Common Shares will continue to trade on the TSX under the

stock symbol "ERD" and on the MSE under the stock symbol “ERDN” under a new CUSIP:

29480N404 and new ISIN: CA29480N4049.

The Company’s transfer agent is mailing a letter of transmittal to each registered

shareholder. The letter of transmittal contains instructions on how to surrender to the

transfer agent the certificate(s) representing the pre-Consolidation Common Shares. The

transfer agent will send to each registered shareholder who follows the instructions

provided in the letter of transmittal a new share certificate representing the number of

post-Consolidation Common Shares to which the shareholder is entitled rounded up to

the nearest whole number or, alternatively, a DRS Advice/Statement representing the

number of post-Consolidation Common Shares the shareholder is entitled rounded up to

the nearest whole number following the Consolidation. No action is required by beneficial

shareholders of the Company to receive post -Consolidation Common Shares in

connection with the Consolidation. Beneficial shareholders who hold their pre -

Consolidation Common Shares through intermediaries (e.g., a broke r, bank, trust

company investment dealer or other financial institution) and who have questions

regarding how their Common Shares will be processed in connectio n with the

Consolidation should contact their intermediaries.

TSX: ERD | MSE: ERDN | OTCQB: ERDCF

www.erdene.com 2 [email protected]

The exercise price and the number of Common Shares issuable upon the exercise or

settlement of the Company’s currently outstanding stock options and deferred share units,

issued pursuant to the Company’s omnibus equity incentive plan (the “Omnibus Plan”)

and legacy incentive stock option and deferred share unit plans, have been

proportionately adjusted to reflect the Consolidation in accordance with their respective

terms. In addition, the number of Common Shares reserved for issuance under the

Company’s Omnibus Plan has been reduced proportionately to reflect the Consolidation.

Further details regarding the Consolidation are contained in the Company’s management

information circular dated May 20, 2025, which is available on SEDAR+ at

www.sedarplus.ca under the Company’s profile.

About Erdene

Erdene Resource Development Corp. is a Canada-based resource company focused on

bringing the Bayan Khundii Gold Mine into production in late 2025 and on the acquisition,

exploration, and development of precious and base metals in underexplored and highly

prospective Mongolia. The Company has interests in three mining licenses and two

exploration licenses in Mongolia, where exploration success has led to the discovery and

definition of the Khundii Gold District. Erdene Resource Development Corp. is listed on

the Toronto and the Mongolian stock exchanges and OTCQB Venture Market. Further

information is available at www.erdene.com. Important information may be disseminated

exclusively via the website; investors should consult the site to access this information.

Forward-Looking Statements

Certain information regarding Erdene contained herein may constitute forward-looking

statements within the meaning of applicable securities laws. Forward-looking statements

may include estimates, plans, expectations, opinions, forecasts, projections, guidance, or

other statements that are not statements of fact. Although Erdene believes that the

expectations reflected in such forward-looking statements are reasonable, it can give no

assurance that such expectations will prove to have been correct. Erdene cautions that

actual performance will be affected by a number of factors, most of which are beyond its

control, and that future events and results may vary substantially from what Erdene

currently foresees. Factors that could cause actual results to differ materially from those

in forward-looking statements include the ability to obtain required third party approvals,

market prices, exploitation, and exploration results, continued availability of capital and

financing and general economic, market or business conditions. The forward-looking

statements are expressly qualified in their entirety by this cautionary statement. The

information contained herein is stated as of the current date and is subject to change after

that date. The Company does not assume the o bligation to revise or update these

forward-looking statements, except as may be required under applicable securities laws.

NO REGULATORY AUTHORITY HAS APPROVED OR DISAPPROVED THE

CONTENTS OF THIS RELEASE

TSX: ERD | MSE: ERDN | OTCQB: ERDCF

www.erdene.com 3 [email protected]

Erdene Contact Information

Peter C. Akerley, President and CEO, or

Robert Jenkins, CFO

Phone: (902) 423-6419

Email: [email protected]

Twitter: https://twitter.com/ErdeneRes

Facebook: https://www.facebook.com/ErdeneResource

LinkedIn: https://www.linkedin.com/company/erdene-resource-development-corp-/