HYTERRA LTD — Capital/Financing Update 2025

Sep 17, 2025

==> picture [596 x 107] intentionally omitted <==

----- Start of picture text ----- HyTerra Limited Phone +61 8 6478 7730Unit 6, Churchill Court, 335 Hay Street info@hyterra.comSubiaco Western Australia 6008 ABN 68 116 829 675ASX: HYT hyterra.com----- End of picture text -----

18[th] September 2025

ASX RELEASE

HyTerra Commences USA OTCQB Quotation Process

• HyTerra is one of the leading USA Geologic Hydrogen companies holding leases near industrial and agricultural hubs.

• The Company is currently traded on the OTC Markets in the USA in the Pink Limited Information Tier.

• HyTerra will now commence a quotation on the OTCQB Venture Market to provide increased visibility, trading access, and liquidity for North American investors, while maintaining the primary listing on the ASX.

• US-based capital markets advisory group Viriathus Capital LLC was appointed to deliver the entire OTCQB quotation process.

• An OTCQB quotation is the next step of a broader targeted USA engagement and positioning strategy, building on ever-increasing visibility and investor engagement happening right now in the USA for HyTerra.

---

HyTerra Limited (ASX: HYT) ( HyTerra or the Company ) is pleased to announce the appointment of US-based Viriathus Capital LLC ( Viriathus Capital ) to assist in securing quotation of the Company’s ASX-listed ordinary shares on the OTCQB Venture Market in the United States.

A OTCBQ quotation is the next step of a broader targeted USA engagement and positioning strategy for HyTerra, post the appointment of Dr. Douglas Wicks as USA Strategic Advisor who is building Hyterra visibility and investor engagement in the United States. The Company is already listed on the OTC Markets in the Pink Limited Information Tier, (PINL:HYTLF), and a reclassified upgrade of the HYTLF ticker to OTCQB Venture Market will provide increased visibility, trading access and liquidity for North American investors.

Viriathus Appointment

Viriathus Capital has significant experience supporting ASX-listed companies and is recognised as the leading sponsor of Australian issuers on the OTC Markets. Since 2010, the firm has sponsored more than 50 listings, including 11 in 2024 and 14 to date in 2025.

==> picture [108 x 37] intentionally omitted <==

Viriathus Capital has been appointed as the Company’s Financial Advisor to manage the process of the quotation which includes

1. Prepare documentation and OTCQB listing application

2. Assistance in investor disclosure and compliance requirements

3. Market maker support for the Company’s shares on OTCQB

Avon McIntyre, Executive Director commented “HyTerra’s planned OTCQB quotation is a critical step in opening new opportunities for USA-based investors to participate in our USA journey. The fact that there is already trading on the existing PINL:HYTLF is a very good sign and a positive entry point into an easier way for USA investors to invest via a OTCQB quotation. This is a key step forward as there is an increase in engagement happening with HyTerra from USA-based institutions, companies, and investors.”

HyTerra will keep shareholders updated as the process progresses and quotation on the OTCQB is completed.

This announcement has been authorised for release by the Board of Directors.

For more information:

Benjamin Mee Executive Director info@hyterra.com

Avon McIntyre Executive Director info@hyterra.com

2

==> picture [108 x 37] intentionally omitted <==

HyTerra. A World of Opportunity.

==> picture [247 x 209] intentionally omitted <==

Exploring for geologic hydrogen and helium resources near major industrial hubs. HyTerra was the first company to list on the ASX with a focus on geologic hydrogen, which is generated naturally by the Earth. Geologic hydrogen potentially has much lower production costs and carbon emissions than man-made hydrogen.

Our Nemaha Project in Kansas, USA, holds 100% owned and operated leases across the emerging Nemaha Ridge geologic hydrogen and helium play fairway. Our Geneva Project in Nebraska, USA, is a 16% earn-in interest in a Joint Development with Natural Hydrogen Energy LLC targeting geologic hydrogen and helium. Both projects could be connected via existing transport infrastructure to

multiple nearby off-takers, including ammonia manufacturers, and petrochemical plants. For more information please see the latest corporate presentation: www.hyterra.com

Important Risk Commentary:

It is important to note that there remains both geological and potential development risks with these projects and the Company’s commercial and business objectives. This is an emerging frontier with the potential to unlock significant low-carbon hydrogen gas supplies but with equally significant risk and uncertainty. Key risks include the presence, concentrations, recovery, and commercial potential of both hydrogen and helium gases. For more information on risks please refer to the ASX release ‘Entitlement Issue Prospectus’ on April 8th, 2024: https://wcsecure.weblink.com.au/pdf/HYT/02793318.pdf.

Forward Looking Statements:

This release may contain forward-looking statements. These statements relate to the Company’s expectations, beliefs, intentions or strategies regarding the future. These statements can be identified by the use of words like “anticipate”, “believe”, “intend”, “estimate”, “expect”, “may”, “plan”, “project”, “will”, “should”, “seek” and similar words or expressions containing same. These forward-looking statements reflect the Company’s views and assumptions with respect to future events as of the date of this release and are subject to a variety of unpredictable risks, uncertainties, and other unknowns. Actual and future results and trends could differ materially from those set forth in such statements due to various factors, many of which are beyond our ability to control or predict. These include, but are not limited to, risks or uncertainties associated with the discovery and development subsurface gas reserves, cash flows and liquidity, business and financial strategy, budget, projections and operating results, gas prices, amount, nature and timing of capital expenditures, including future development costs, availability and terms of capital and general economic and business conditions. Given these uncertainties, no one should place undue reliance on any forward-looking statements attributable to HyTerra, or any of its affiliates or persons acting on its behalf. Although every effort has been made to ensure this release sets forth a fair and accurate view, we do not undertake any obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Nothing contained in this announcement, nor any information made available to you is, or and shall be relied upon as, a promise, representation, warranty or guarantee as to the past, present or the future performance of HyTerra.

3