FILINGS MARK THE COMPANY'S EVOLUTION FROM MINING AND EXPLORATION INTO AN INTEGRATED HEAVY RARE EARTH TECHNOLOGY PLATFORM

MIAMI, April 22, 2026 - American Terbium Corp. ("American Terbium" or the "Company"), a privately held strategic metals explorer and pioneer in rapidly leachable Dysprosium-Terbium (Dy-Tb) deposits, today announced that it has filed eight U.S. provisional patent applications with the United States Patent and Trademark Office (USPTO). Filed this month, the applications establish a priority position around the Company's proprietary process technology for recovering heavy rare earth elements (HREEs) from its new class of sediment-hosted feedstock.

From Explorer to Integrated Technology Platform

The filings mark a structural shift for American Terbium. Developed out of the Company's own bench work on material from its Lost Basin Project, the portfolio extends American Terbium beyond a pure mining and exploration story into an integrated technology platform, one the Company can license, partner around, and apply for federal research and development funding against, alongside its underlying exploration and mining work.

"With that filing the Company has changed shape," said Francis Boulle, President & CEO of American Terbium. "We are no longer just a mining and exploration company applying a geological model. We are the leading technical authority on this style of deposit, and we own a defensible IP position around the best processing chemistry for it."

A Single, Additive Portfolio

The eight provisional applications were drafted as a single, additive portfolio: any one family that is ultimately granted strengthens the others, and the Company believes the integrated platform is worth more than the sum of its parts. Together the applications span the processing pathway from feedstock pre-treatment through final product recovery and reagent recovery, forming what the Company believes is a defensible position around a low-cost, simple-circuit route to producing heavy rare earth concentrate from this class of material. American Terbium is not disclosing the specific subject matter of the individual applications at this time.

"This portfolio is the product of years of work to understand how this deposit type behaves and how best to process it," said Michael Thomsen, Executive Chairman of American Terbium. "Applying that chemistry to our own resource base is what makes the technology and the deposits mutually reinforcing; each side strengthens the other, and together they advance the goal of a domestic, non-China-dependent supply of dysprosium and terbium."

About American Terbium Corp.

American Terbium Corp. is a privately held corporation committed to advancing the production of heavy rare earth elements (HREEs) in North America. By applying a pioneering geological model to explore paleo basin sediments, the Company has identified high-grade Dysprosium-Terbium (Dy-Tb) deposits with rapid leachability, and is developing proprietary process technology to recover these critical metals. American Terbium strives to ensure North American independence in the production of these critical metals to support clean energy technologies, electric vehicles, and defense systems.

Note Regarding Provisional Patent Applications

Provisional patent applications establish a priority date and provide a twelve-month window within which the Company may file corresponding non-provisional (utility) applications. Provisional applications are not examined by the USPTO and do not themselves grant any enforceable patent rights. There can be no assurance that any provisional application will mature into an issued patent, or as to the scope, validity, or enforceability of any patent that may ultimately issue.

Forward-Looking Statements

This announcement contains forward-looking statements regarding the Company's technology, intellectual property strategy, and business prospects. Such statements are based on current expectations and are subject to risks and uncertainties, including those relating to patent prosecution, technology development, and commercialization. Any internal targets or estimates referenced by the Company are not mineral resources or mineral reserves under S-K 1300, NI 43-101, or any similar reporting regime. Actual results may differ materially from those expressed or implied. The Company undertakes no obligation to update these statements except as required by law.

On behalf of the Board,

Francis Boulle

President & CEO

American Terbium Corp.

For more information, please contact:

Email: info@americanterbium.com

(C) 2026, American Terbium Corp. All Rights Reserved.