Prismo Metals to Host Webinar on June 4th, 2026

Vancouver, British Columbia – TheNewswire - May 25th, 2026 – Prismo Metals Inc. (the “ Company ”) (CSE: PRIZ) (OTCQB: PMOMF) is pleased to invite investors and other interested parties to attend the Company’s upcoming live webinar presentation and audience Q&A on June 4 th at 1:00 pm PDT (4:00 pm EDT). CEO Alain Lambert, CXO Dr. Craig Gibson, CPG, and Special Advisor Dr. Linus Keating, CPG, will provide an update on exploration at the Silver King mine project. Silver King is a historic silver mine and Arizona's first and one of its most important historic silver producers, yielding nearly six million ounces of silver at grades of up to 61 ounces per ton (1) .

The Silver King mine sits only 3.4 kilometres from the main shaft of the Resolution copper project -- a joint venture between Rio Tinto and BHP and considered one of the world's largest unmined copper deposits. The webinar will be a live, interactive online event where attendees can ask the presenters questions in real time. A recording will be available for those who cannot join the live event.

Event : Radius Research Pitch, Deep Dive, and Q&A with Prismo Metals Inc. Presentation Date & Time : Thursday, June 4th @ 4 PM ET / 1 PM PT Webcast Registration Link : https://us02web.zoom.us/webinar/register/3817793389946/WN_3Aic1L-fSKC62pyNWVOCoA This webinar will be hosted by Radius Research, giving individual investors access to in-depth CEO interviews with deep-dive institutional-level discussion and Q&A. Radius Research is part of Market Radius Capital, Inc. and hosted by Martin Gagel, a former top-ranked sell-side technology and special situations analyst. About Silver King Discovered in 1875, the Silver King mine is one of Arizona’s most important historical producers, yielding nearly 6 million ounces of silver at grades of up to 61 oz/t.

Selected samples from small-scale production in the late 1990s returned historical grades as high as 644 oz/t silver (18,250 g/t) and 0.53 oz/t gold (15 g/t). Additionally, the presence of freibergite (AgCuSbS) suggests a potential for antimony, a critical mineral with growing strategic demand. Strategic Location The Silver King mine sits only 3 km from the main shaft of the Resolution Copper project — a joint venture between Rio Tinto and BHP and recognized as one of the world’s largest unmined copper deposits. (2) This unique land position is fully surrounded by Resolution Copper’s and Ivanhoe Electric’s claim blocks, offering strategic upside.

The Silver King mine was discovered in 1875. Underground production through 1889 is estimated at almost 6 million ounces of silver at grades of between 61 and 21 ounces per ton. During a second period of production from 1918 to 1928, 230,000 ounces were produced at a grade of 18.7 ounces per ton. (1) With respect to the Resolution deposit, the QP has been unable to verify the information, and the information is not necessarily indicative to the mineralization on the Silver King property. (1) From historical records, non-NI-43-101-compliant   (2) https://resolutioncopper.com/about-us/   Qualified Person Dr. Craig Gibson, PhD., CPG., a Qualified Person as defined by NI-43-01 regulations and Chief Exploration Officer and a director of the Company, has reviewed and approved the technical disclosures in this news release.  The historic data presented in this press release was obtained from public sources, should be considered incomplete and is not qualified under NI 43-101, but is believed to be accurate.

The Company has not verified the historical data presented and it cannot be relied upon, and it is being used solely to aid in exploration plans. About Prismo Metals Inc. Prismo (CSE: PRIZ) is a mining exploration company focused on advancing its Silver King, Ripsey and Hot Breccia projects in Arizona and its Palos Verdes silver project in Mexico. Please follow @PrismoMetals on , , , Instagram , and Prismo Metals Inc. 1100 - 1111 Melville St., Vancouver, British Columbia V6E 3V6 Phone: (416) 361-0737   Contact: Alain Lambert, Chief Executive Officer alain.lambert@prismometals.com   Cautionary Note Regarding Forward-Looking Information This release includes certain statements and information that may constitute forward-looking information within the meaning of applicable Canadian securities laws.

Forward-looking statements relate to future events or future performance and reflect the expectations or beliefs of management of the Company regarding future events. Generally, forward-looking statements and information can be identified by the use of forward-looking terminology such as “intends” or “anticipates”, or variations of such words and phrases or statements that certain actions, events or results “may”, “could”, “should”, “would” or “occur”. This information and these statements, referred to herein as "forward‐looking statements", are not historical facts, are made as of the date of this news release and include without limitation, statements regarding discussions of future plans, estimates and forecasts and statements as to management's expectations and intentions with respect to, among other things: the timing, costs and results of drilling at Silver King.

These forward‐looking statements involve numerous risks and uncertainties, and actual results might differ materially from results suggested in any forward-looking statements. These risks and uncertainties include, among other things: delays in obtaining or failure to obtain appropriate funding to finance the exploration program at Silver King. In making the forward-looking statements in this news release, the Company has applied several material assumptions, including without limitation, that: the ability to raise capital to fund the drilling campaign at Silver King and the timing of such drilling campaign.

Although management of the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements or forward-looking information, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements and forward-looking information.

Readers are cautioned that reliance on such information may not be appropriate for other purposes. The Company does not undertake to update any forward-looking statement, forward-looking information or financial out-look that are incorporated by reference herein, except in accordance with applicable securities laws. We seek safe harbor.   Copyright (c) 2026 TheNewswire - All rights reserved.