Premier American Uranium Announces Strategic Partnership with DISA Uranium Through Colorado Asset Sale and Equity Investment

Premier American Uranium Inc. (“PUR”, the “Company” or “Premier American Uranium”) (TSXV: PUR) (OTCQB: PAUIF) is pleased to announce that it has entered into an asset purchase agreement (the “Agreement”) dated September 14, 2026, with DISA Uranium™ Corporation (“DISA Uranium”), pursuant to which the Company has agreed to sell to DISA Uranium all of its rights, title and interest in and to the Outlaw Mesa, Atkinson Mesa, Monogram Mesa and Slick Rock Projects located in Colorado (the “Colorado Package”) for aggregate consideration of approximately US$2,000,000, consisting of 25,413 shares of DISA Uranium (“DISA Uranium Shares”) and warrants to acquire an equivalent number of DISA Uranium Shares (the “Transaction”). asserted

Concurrently, DISA Uranium will make a strategic equity investment in subscription receipts of PUR (“Subscription Receipts”) at a price of C$0.75 per Subscription Receipt (the “Offering Price”), for aggregate proceeds of US$5,000,000, expected to result in an approximately 8.7% ownership interest in PUR (the “Equity Investment”). asserted

This represents a 41.5% premium to the closing price of PUR shares on September 14, 2026. asserted

DISA Uranium is a new, well-capitalized American uranium production platform pursuing a supply chain growth strategy across conventional uranium production, remediation and recovery, and future domestic processing. asserted

Concurrent with its recently completed transaction with IsoEnergy Ltd. (“IsoEnergy”), DISA Uranium closed a US$105 million private placement financing backed by leading mining, energy and technology investors, including Tembo Capital, BHP Ventures, Galvanize Climate Solutions, Valor Equity Partners, Evok Innovations, Halliburton Labs and Veriten. asserted

Its portfolio includes the permitted, past-producing Tony M, Daneros and Rim mines and the Sage Plain and Flatiron projects in Utah, complemented by its proprietary HPSA™ technology and NRC-licensed abandoned uranium mine remediation and recovery platform. asserted

PUR will receive US$2,000,000 in DISA Uranium Shares, together with an equal number of warrants, monetizing its non-core Colorado assets while retaining exposure to their future development and gaining participation in the growth of DISA Uranium’s broader U.S. uranium platform. asserted

DISA Uranium will make a concurrent Equity Investment in PUR at C$0.75 per Subscription Receipt, reflecting a 41.5% premium to the last close of PUR shares, resulting in an approximately 8.7% ownership interest and providing additional capital to advance PUR’s core portfolio. asserted

Subject to maintaining a specified ownership threshold, DISA Uranium will receive customary participation rights and the right to nominate one director to PUR’s Board of Directors. asserted

Greyson Buckingham, CEO of DISA Uranium is expected to join PUR’s Board upon closing. asserted

Through PUR’s equity position in DISA Uranium, PUR shareholders will gain exposure to a well-capitalized U.S. uranium platform backed by US$105 million of financing and leading mining, energy and technology investors, with conventional uranium assets, proprietary recovery technology and an NRC-licensed remediation business. asserted

- Strategic Relationship Could Unlock New Development Options for Cebolleta: uncertain

Given the nature of Cebolleta’s sandstone-hosted uranium mineralization, PUR believes that the project could be well suited to benefit from DISA Uranium’s HPSA™ technology. uncertain

The technology has the potential to increase grade by rejecting waste mass prior to downstream processing which could unlock operating and processing scenarios not previously considered for Cebolleta, including opportunities to simplify processing and reduce mine-site infrastructure. uncertain

Together with DISA Uranium’s planned regional processing capacity, this could provide PUR with additional development pathways to evaluate as it continues to advance and optimize Cebolleta. uncertain

The Transaction further focuses PUR’s portfolio and capital allocation on advancing the Cebolleta, Kaycee and Cyclone projects, supporting the Company’s strategy to build value through the exploration, advancement and optimization of its core U.S. uranium assets. asserted

Colin Healey, CEO and Director of PUR commented, “This Transaction once again demonstrates our ability to execute on PUR’s strategy of disciplined capital allocation. asserted

By monetizing our non-core Colorado assets, we are unlocking value while retaining meaningful exposure to their future potential through our equity position in DISA Uranium. asserted

At the same time, DISA Uranium’s strategic investment in PUR at a premium provides additional capital to support our core portfolio and creates strong alignment between our companies. asserted

We believe DISA Uranium is building a differentiated U.S. uranium platform, and we are pleased to participate in its future growth while maintaining our focus on advancing Cebolleta, Kaycee and Cyclone. asserted

The relationship also creates potential strategic opportunities for Cebolleta, including the evaluation of DISA Uranium’s HPSA™ technology and future regional processing capacity, which could provide additional development pathways as we continue to advance and optimize the project. uncertain

Greyson Buckingham, CEO of DISA Uranium commented, “Our investment in PUR extends the relationship beyond the Colorado Portfolio and gives DISA Uranium a direct interest in PUR’s continued growth. asserted

Together, the investment and Board position create long-term alignment between the companies and a foundation to explore future opportunities across PUR’s broader U.S. portfolio, including where our technology and planned processing capabilities may add value. uncertain

I look forward to joining PUR’s Board and contributing to its next stage of development. asserted

Pursuant to the Agreement, DISA Uranium has agreed to acquire the Colorado Package from PUR in consideration for: - the issuance to PUR of US$2,000,000 worth of equity consisting of 25,413 DISA Uranium Shares on closing of the Transaction; and - the issuance to PUR of warrants exercisable to acquire 25,413 DISA Uranium Shares at a price of US$118.05 per share, subject to the satisfaction of certain vesting conditions. asserted

Completion of the Transaction is subject to satisfaction of customary closing conditions as set forth in the Agreement, including, among other things, receipt of applicable regulatory approvals including the approval of the Department of Energy and completion of the Equity Investment, including the conversion of the Subscription Receipts in accordance with the terms thereof. asserted

Pursuant to the Equity Investment, DISA Uranium has agreed to acquire Subscription Receipts at the Offering Price a for aggregate proceeds of US$5,000,000 (as converted to Canadian dollars using the applicable exchange rate). asserted

Each Subscription Receipt will entitle the holder thereof to automatically receive, upon satisfaction or waiver, as applicable, of certain escrow release conditions (the “Escrow Release Conditions”), one common share of PUR. asserted

The Escrow Release Conditions include the satisfaction of all conditions precedent to the completion of the Transaction. asserted

The proceeds of the Equity Investment will be held in escrow and not released to PUR until the Escrow Release Conditions are satisfied or waived, as applicable. asserted

If the Escrow Release Conditions have not been satisfied or waived, as applicable, on or prior to June 13, 2027, the aggregate Offering Price of the Subscription Receipts (plus any interest earned thereon) will be returned to DISA Uranium, and such Subscription Receipts will be automatically cancelled and be of no further force and effect. asserted

Following the satisfaction or waiver, as applicable, of the Escrow Release Conditions, the proceeds of the Equity Investment are expected to be used by the Company to fund proposed exploration and development programs for PUR’s projects as well as for working capital and general corporate purposes. asserted

The Transaction constitutes a “related party transaction” within the meaning of Multilateral Instrument 61-101 – Protection of Minority Security Holders in Special Transactions (“MI 61-101”). asserted

The Company has determined that the Transaction is exempt from the formal valuation and minority shareholder approval requirements of MI 61-101 by virtue of the exemptions contained in Section 5.5(a) and Section 5.7(1)(a) of MI 61-101, as neither the fair market value of the subject matter of, nor the consideration paid under, the Transaction exceeds 25% of the Company’s market capitalization. asserted

The Transaction was approved by the board of directors of the Company with Mr. Tunney having disclosed his interest in the Transaction and abstaining from voting in respect thereof. asserted

The Company has not received, nor has it requested a valuation of its securities or the subject matter of the Transaction in the 24 months prior to the date hereof. asserted

This news release does not constitute an offer to sell or a solicitation of an offer to buy nor shall there be any sale of any of the securities in any jurisdiction in which such offer, solicitation or sale would be unlawful, including any of the securities in the United States of America. asserted

The securities referred to in this news release have not been, and will not be, registered under the United States Securities Act of 1933, as amended (the “U.S. Securities Act”) or any U.S. state securities laws, and may not be offered or sold in the United States or to, or for the account or benefit of, U.S. persons, absent registration or any applicable exemption from the registration requirements of the U.S. Securities Act and applicable U.S. state securities laws. uncertain

About DISA Uranium™ Corporation DISA Uranium™ Corporation (DISA Uranium) is redefining American uranium recovery and production. asserted

Headquartered in Casper, Wyoming, the veteran-led Company recovers uranium and vanadium from abandoned uranium mine (AUM) waste, remediates legacy sites left across the western United States, and applies its patented high-pressure slurry ablation technology (HPSA™) to make conventional uranium production cleaner, more efficient, and more economic. asserted