Erdene Resource Development Corporation press release

Erdene to Announce Zuun Mod Molybdenum-Copper Project Preliminary Economic Assessment Results on October 14, 2026

2026-10-13

TSX - Toronto Stock Exchange · Gold · Silver · Lead · Zinc · Molybdenum · Antimony · Copper · Canada · Technical Studies

HALIFAX, Nova Scotia, Oct. 13, 2026 (GLOBE NEWSWIRE) -- Erdene Resource Development Corp. (TSX:ERD; MSE:ERDN; OTCQX: ERDCF) ("Erdene" or the "Company")announces that it will release the results of the Preliminary Economic Assessment (“PEA”) of its Zuun Mod Molybdenum-Copper Project on October 14, 2026, after market hours.

Management will host a conference call and webcast to discuss the results, on Thursday October 15, 2026, at 9:00 AM Eastern Time.

The dial-in numbers for the conference call are as follows:

North America (toll free): 1 800 717 1738 Overseas or local (Toronto): 1 289 514 5100

The webcast will be accessible at the following link: HERE

A replay of the webcast will be available at the same link for one year after the event.

About Erdene

Erdene Resource Development Corp. is a Canada-based resource company producing gold at the high-grade, low-cost Bayan Khundii Gold Mine in underexplored and highly prospective Mongolia. The Company has interests in a highly prospective portfolio of precious and base metal projects in close proximity to the Bayan Khundii Gold Mine in the Khundii Minerals District, which provides a robust organic growth pipeline. Erdene Resource Development Corp. is listed on the Toronto (“ERD”) and the Mongolian stock (“ERDN”) exchanges and OTCQX Market (“ERDCF”). Further information is available atwww.erdene.com. Important information may be disseminated exclusively via the website; investors should consult the site to access this information.

NO REGULATORY AUTHORITY HAS APPROVED OR DISAPPROVED THE CONTENTS OF THIS RELEASE

| Erdene Contact Information | | | | | | Peter C. Akerley, President and CEO, or Robert Jenkins, CFO | | | Phone: | (902) 423-6419 | | Email: | info@erdene.com | | Twitter: | https://twitter.com/ErdeneRes | | Facebook: | https://www.facebook.com/ErdeneResource | | LinkedIn: | https://www.linkedin.com/company/erdene-resource-development-corp-/ |

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