Erdene Resource Development : Developing the High-Grade Khundii Minerals District, Q2 2025

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DEVELOPING THE HIGH-GRADE KHUNDII MINERALS DISTRICT

Unlocking Treasures - Sharing Benefits

Q2 2025

www.erdene.com

DEVELOPING THE HIGH-GRADE KHUNDII MINERALS DISTRICT

Investment Thesis

First mover in an unexplored portion of a World Class Mineral Belt

• Unparalleled discovery potential for large, high-grade gold and copper deposits

High-grade gold development

• Bayan Khundii Gold Project moving to production in mid-2025

Multimillion ounce potential

• Multiple high-grade gold discoveries adjacent to the Bayan Khundii Gold Project and significant exploration upside in district

Powerful Alliance

• Uniting Erdene and Mongolia's leading miner backed by one of the Country's largest conglomerates

A sleeping giant

• Zuun Mod Molybdenum-Copper Porphyry Complex is one of Asia's largest undeveloped projects

A WINDOW OF OPPORTUNITY - LIMITED EXPLORATION IN A HIGHLY PROSPECTIVE BELT

Global distribution of giant arc related gold and copper deposits

HIGHEST POTENTIAL REGION FOR COPPER-GOLD DISCOVERIES

2010 Central Asian Orogenic Belt and Eastern Tethysides USGS

"Remoteness, harsh terrain, and lack of infrastructure impeded exploration in many areas, with the western end of the tract having not received much attention"*

Khundii

Minerals District

Locations of giant ore deposits discussed in this paper and significant arc-related metallogenic belts (purple lines).

Base map modified from World of Maps (© Bruce Jones Design, 2010).

EXPANDING INFRASTRUCTURE IN A GROWING MINING JURISDICTION

Less than 200km from the Chinese border, multiple mines in vicinity

Mongolian and Chinese governments are aggressively building infrastructure: three railway lines now connect to China and intra-Mongolian road and rail networks have been recently expanded

MONGOLIA

Legend

ERDENE Projects

Mines & Major Projects

Major Paved Road

Unpaved Road

Existing Railway

Planned Railway

International Airport

C ity

Regional Airport

Taiyuan

MAKINGS OF A MULTI-MINE, MULTI-COMMODITY DISTRICT

Multiple deposits in close proximity to be developed in sequence - more than 20 additional prospects in district

N

40 km

ERDENE PROPERTY

OTHER OWNER

Mineral Deposits

Proposed State Rail

Proposed Zuun Mod Rail Spur

Existing Roads

Proposed Mine Access Roads

Provincial Boundary

Towns/ Soum Centres

UNITING MONGOLIA'S LEADING EXPLORER AND MINER WHILE MAINTAINING LONG TERM UPSIDE

Strategic partner with capital and operational experience

TSX : ERD

|

MSE : ERDN

Eric Sprott (19%)

7,000 Mongolian

EBRD (8%)

shareholders

50:50 JV with Mongolian Mining

Corporation

District Scale (700 sq km AOI) Upside

ERD 5% NSR*

100% Equity Interest

Large scale copper-molybdenum project

Bayan Khundii

Dark Horse

Altan Nar

Ulaan

Zuun Mod

Khuvyn Khar

Gold Project

Gold Project

Gold-Polymetallic Project

Gold Project

Copper-Moly Project

Copper Project

Khundii

Altan Nar

Ulaan

Mining Licence

Exploration Licence

Khuvyn Khar Mining Licence

Mining Licence

*After initial 400,000oz Au production; includes properties acquired within 5km of the licenses

FINANCIAL PARTNERS

Backing of leading international and domestic institutions

Mongolian Mining Corporation - Equity

▪ US$40M equity investment in Erdene's subsidiary

▪ Forecast ~US$500M EBITDA annually1

Mongolian Mining Corporation - Loan

▪ US$80 million, 5-year shareholder loan repayable in full upon maturity

▪ Interest rate of 13.8%, with option to capitalize the first four interest payments

▪ Erdene has the right to purchase 50% of the loan and participate on the same terms as MMC

Trade & Development Bank of Mongolia

▪ US$50 million, twenty-four month, working capital facility, repayable in six equal payments during the last six months

▪ Interest rate of 13.3%

European Bank for Reconstruction and Development

▪ Major shareholder (8%) following loan conversion in Q4 2020

▪ Largest foreign direct investor in Mongolia with €2.4 invested, including senior lender to Oyu Tolgoi

Eric Sprott

Eric Sprott

▪ Erdene's largest shareholder (19%)

Mongolian Stock Exchange

▪ Sharing benefits with more than 7,000 Mongolian shareholders

▪ Erdene is first company cross-listed on both Mongolian and Toronto Stock Exchanges

1.

Per Fitch Ratings report

THE BAYAN KHUNDII (RICH VALLEY) GOLD MINE BAYAN KHUNDII DEPOSIT - RESOURCE AND RESERVES

Utilizing US$1800 gold price for reserve cut-off grades and US$2000 gold price for Whittle Pit resource shells

2000 m

10

Gold ≥ 0.1 g/t*

Anomalous Indicator*

(±Sb, As, Qtz Veining, Alteration)

Primary Target Structure Secondary Structure or Splay

*Based on drill result interpolation only

Disclaimer

Erdene Resource Development Corporation published this content on April 02, 2025, and is solely responsible for the information contained herein. Distributed via , unedited and unaltered, on April 02, 2025 at 05:04 UTC.