Mr. Gabriel Rubacha reports

NOA LITHIUM ANNOUNCES COMPLETION OF MOBILIZATION AND START OF 2026 EXPLORATION DRILLING PROGRAM AT RIO GRANDE PROJECT

Further to its press release dated April 23, 2026, NOA Lithium Brines Inc.'s drilling contractor, Hidrotec SA, has completed mobilization of two drilling rigs for NOA's 2026 exploration drilling campaign at its flagship Rio Grande project in Salta province, Argentina. Site preparation activities, including construction of well pads, have been completed, and drilling is expected to commence early next week.

These exploration activities form part of NOA's work program as it advances the project toward completion of a preliminary feasibility study (PFS) by year-end 2026.

NOA's chief executive officer, Gabriel Rubacha, stated: "With mobilization complete and drilling expected to begin shortly, we are entering an important phase of fieldwork at Rio Grande as we advance toward the PFS. This program is designed to further derisk the project through additional hydrogeological data and testing, and it complements the process development and engineering work currently under way with Hatch. Together, these activities are intended to support a robust PFS design basis and development pathway."

In this initial exploration campaign, the company plans to drill exploratory wells near diamond drill holes DDH-RG23-001 (Sulfa X) and DDH-RG23-004 (El Camino II). The program is designed to evaluate the hydraulic parameters of deep brine-bearing aquifers and support continuing refinement of the hydrogeological and resource models as the project progresses toward more advanced technical and economic studies.

This exploration drill program has been reviewed and approved by Montgomery &Associates, which is currently preparing the water balance of the project and will participate in the preparation of the PFS of the project.

About NOA Lithium Brines Inc.

NOA is a lithium exploration and development company formed to acquire assets with significant resource potential. All NOA's projects are located in the heart of the prolific Lithium Triangle, in the mining-friendly province of Salta, Argentina, near a multitude of projects and operations owned by some of the largest players in the lithium industry. NOA has rapidly consolidated one of the largest lithium brine claim portfolios in this region that is not owned by a producing company, with key positions on three prospective salars, being Rio Grande, Arizaro and Salinas Grandes, and totalling over 140,000 hectares.

Qualified person

Mr. Michael Rosko, MSc, CPG, of E.L. Montgomery and Associates is a registered geologist (CPG) in Arizona, California and Texas, a registered member of the Society for Mining, Metallurgy and Exploration, and a qualified person as defined by National Instrument 43-101. Mr. Rosko and hydrogeologists from Montgomery and Associates have been on site multiple times during the various phases of drilling and sampling operations and Mr. Rosko has extensive experience in salar environments and has been a qualified person on many lithium brine projects. Mr. Rosko and Montgomery and Associates are completely independent of NOA, as defined in and required by NI 43-101, and Mr. Rosko has reviewed and approved the content of this news release.

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