5E Advanced Materials Files Patent for Meta Boric Acid with 80% B2O3 Content

5E Advanced Materials has produced a stable meta boric acid product, achieving approximately 80% B2O3 equivalent content and has filed a provisional patent application with the U.S. Patent and Trademark Office covering the Company's production process. This breakthrough expands the Company's portfolio and represents a potential higher-margin boron derivative opportunity within the global boron materials market. Meta Boric Acid is a higher-concentration boric acid advanced material with ~80% B2O3 content, sitting between traditional boric acid (～56% B2O3 content) and boron oxide. Higher boron concentration enhances unit economics with more B2O3 per unit delivered, while supporting robust pricing and higher margins. Meta Boric Acid provides an option for potential customers seeking higher boron content products. Provisional patent application filed to protect the Company's intellectual property and enable additional commercialization pathways. Larger-scale trials and additional customer samples for testing and qualification are ongoing as the Company advances commercialization discussions with prospective customers. This milestone supports 5E's strategy to pursue higher-value boron advanced materials across the supply chain, expanding the Company's previously announced ferroboron initiative.