5E Advanced Materials, Inc. — Major Shareholding Notification 2026

Feb 3, 2026

ASX Release 4 February 2026

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5E Advanced Materials, Inc. Notice of Substantial Holding

5E Advanced Materials, Inc. (ASX: 5EA) (the Company ) advises that it is aware of changes to its substantial holders that were previously disclosed to the market on 9 December 2025.

Set out below are details, to the best of the Company’s knowledge, of: (i) persons who have become a substantial holder within the meaning of section 671B of the Corporations Act 2001 (Cth) ( Corporations Act ); (ii) movements of at least 1% in the number of fully paid equity securities in the Company in which a substantial holder has a relevant interest within the meaning of section 608 of the Corporations Act; and (iii) persons who have ceased to be a substantial holder (as applicable).

Name of Substantial Holder	Date of change	Number of equity securities in which theSubstantial Holder (and its associates) has arelevant interest	CurrentOwnership %
Ascend Global Investment Fund SPCfor and on behalf of Strategic SP	9 December 2025 –2 February 2026	8,364,294 shares of common stock(1)	20.15%
Bluescape Special Situation IV LLC	9 December 2025 –2 February 2026	12,130,997 shares of common stock	29.22%

(1) Includes shares of common stock held by Meridian Investments Corporation.

This announcement has been authorized for release by the Company’s Chief Executive Officer, Paul Weibel.

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About 5E Advanced Materials, Inc.

5E Advanced Materials, Inc. (Nasdaq: FEAM) (ASX:5EA) is a development stage company focused on becoming a vertically integrated global leader and supplier of refined borates and advanced boron derivative materials whose mission is to enable decarbonization, increase food security, and ensure domestic supply of critical materials. Our business strategy and objectives are to develop capabilities ranging from upstream extraction and product sales of borates, calcium-based co-products, and potentially other byproducts such as lithium carbonate, to downstream advanced boron material processing and development. Our vision is to safely process borates and other industrial minerals through sustainable best practices and a continuous improvement mindset. Our Project is underpinned by boron reserves and a lithium resource, with the borates being contained in a conventional boron mineral known as colemanite. Our facility was designated as Critical Infrastructure by the U.S. Department of Homeland Security’s Cybersecurity and Infrastructure Security Agency in 2022, and boron was added to the U.S. Department of the Interior’s 2025 Critical Minerals List on November 7, 2025.

For further information contact:

Investor Relations:

Brett Maas Hayden IR, LLC FEAM@haydenir.com Ph: +1 (480) 861-2425

Media Relations:

Paola Ashton PRA Communications team@pracommunications.com Ph: +1 (604) 681-1407

5E Advanced Materials, Inc. ARBN 655 137 170 9329 Mariposa Road, Suite 210, Hesperia, California 92344 USA