THUNDER BAY, ON, Aug. 18, 2026 /CNW/ --(EQNX::nobreakspace)Errington Metals Corp. (TSXV: EM)(EQNX::nobreakspace)("Errington" or the "Company") is pleased to announce(EQNX::nobreakspace)results from(EQNX::nobreakspace)its 2026 winter/spring, exploration program at the Balfour mineralized zone, part of the Company's wholly owned Sudbury Basin Project. The drilling program has expanded the known mineralized footprint at Balfour and strengthened the Company's interpretation of a growing polymetallic system, extending both the Main and West Zones 100 metres eastward along strike and 50 metres down dip. Both zones remain open to depth and along strike.

The goal of this drill program was to build on the success of the 2025 drill program and advance Errington's geological model to support the Company's planned mineral resource estimate, while reinforcing Balfour as a meaningful volcanogenic massive sulphide target within the Sudbury Basin. The program also returned attractive silver grades across multiple zones, including several highlighted intervals above 100 grams per tonne silver and a peak highlighted interval of 226.3 grams per tonne silver at Balfour Main. Highlights of the drilling include:

Highlights:¹

• 7.2m grading 1.40% copper (Cu), 4.99% zinc (Zn), 3.51% lead (Pb), 0.24(EQNX::nobreakspace)gpt gold (Au), 146.4 gpt silver (Ag) (5.10% copper equivalent (CuEq)) in EMB-26-058 at Balfour West
• 10.4m grading 0.52% Cu, 4.78% Zn, 2.15% Pb, 0.25(EQNX::nobreakspace)gpt Au, 102.6 gpt Ag (3.51% CuEq) in EMB-26-059 at Balfour West
• 4.9m grading 1.45% Cu, 6.97% Zn, 2.87% Pb, 0.2(EQNX::nobreakspace)gpt Au, 101.0 gpt Ag (5.20% CuEq) in EMB-26-060 at Balfour Wes
• 4.9m grading 0.24% Cu, 5.19% Zn, 3.24% Pb, 0.31(EQNX::nobreakspace)gpt Au, 226.3 gpt Ag (4.72% CuEq) in EMB-26-069 at Balfour Main
• 5.6m grading 0.96% Cu, 9.71% Zn, 3.79% Pb, 0.23(EQNX::nobreakspace)gpt Au, 120.7 gpt Ag (5.92% CuEq) in EMB-26-071 at Balfour Main

Frank Santaguida, Vice President, Exploration of Errington Metals, commented:(EQNX::nobreakspace)"The 2026 drilling at Balfour continues to deliver results that make this project compelling, including particularly attractive silver grades within broader copper-zinc-lead-gold mineralized intervals. The recent program reinforces the strength of the mineralization system at Balfour and the overall potential for growth as we advance Balfour, Errington and Vermilion toward a new mineral resource estimate."

The full context of the new drilling results and the Balfour 3D geological model is available at https://vrify.com/meetings/recordings/b4c5049e-b7cb-4178-a208-863a76bd6f9e.

At the project scale, the 2026 drilling has refined Errington's 3D geological interpretation and validated the broader structural framework at Balfour. The mineralized zones are interpreted to be tightly folded and offset along strike by northeast-trending faults. Bedding and foliation measurements from drill core support a regional east-plunging syncline, with the West and Main Zones aligned within the fold structure. Although the Vermilion mineralized horizon appears thinner between the West and Main Zones, the West Zone remains relatively shallow and comparatively thick, exceeding 10 metres thick down dip. Drilling to date has largely tested the limbs of the interpreted syncline, leaving the deeper hinge zone as a compelling target for future exploration.

Follow-up work at Balfour is ongoing and is focused on converting the strengthened geological interpretation into priority drill targets. Borehole electromagnetic surveys and airborne magnetic surveys are being used to better define folds, faults and conductive targets below surface, further refine the geological model and guide the next phase of exploration drilling. Results from the winter/spring program will also be integrated with the 2025 campaign and historical drilling to support a planned mineral resource estimate.

The Balfour mineralized zones are interpreted as a distal expression of a volcanogenic massive sulphide system. In these systems, high-grade zinc-lead-silver mineralization and stringer-style mineralization commonly occur outward from a copper-rich centre. This interpretation is important because it provides Errington with a clear exploration vector: continued drilling, borehole electromagnetic surveying and airborne geophysics are expected to help refine targets and assess the potential for additional copper-rich mineralization within the broader system.

Table 1: Assay Results for holes drilled at Balfour.

Mineralization is largely contained within a carbonate-chert lithological unit of the Vermilion Formation, comparable to the Errington and Vermilion mineralized zones. Overall, assay grades from the winter drilling program are consistent with previous Balfour results, returning high grades of zinc and silver (see Errington Metals press release dated May 27, 2026). Mineralization typically occurs as massive stringers, up to 20 centimetres thick, containing sphalerite, chalcopyrite, galena and pyrite. Higher-grade copper mineralization occurs throughout Balfour and is distinguished by chalcopyrite-pyrite stringers developed within the footwall volcanic rocks. Massive sulphide mineralization also occurs at the contact between the carbonate-chert and the volcanic rocks, dominated by sphalerite and pyrrhotite.

About Errington Metals

Errington Metals Corp. is a Canadian exploration and development company focused on critical and precious metals. The Company is advancing its wholly owned Sudbury Basin Project, which hosts high-grade volcanogenic massive sulphide ("VMS")-style mineralization in the world-renowned Sudbury mining district. Through systematic drilling, disciplined technical work and a planned initial mineral resource estimate, Errington Metals is positioning the Sudbury Basin Project as a high-quality exploration and development opportunity.

The Company is advancing a planned 45,000-metre drill program designed to support an initial mineral resource estimate and test regional targets.

For further information about the Company please visit www.erringtonmetals.com(EQNX::nobreakspace)and sign up for email updates.

QAQC Procedures

Core samples are collected and handled using industry-standard protocols. Sampling, core cutting and submission to the assay laboratory were conducted and supervised by Errington Metals personnel. Assay results were verified by Errington Metals via Certified Reference Material standards, blanks and field duplicates. Samples were submitted to MSALABS in Timmins, Ontario, which operates in accordance with ISO 17025 accreditation guidelines and holds ISO 9001, ISO 14001 and ISO 45001 certifications. Samples are crushed, pulverized, digested using a four-acid solution and analyzed using a combination of ICP-MS and ICP-AES methods. Gold is analyzed separately from a 30-gram sample using fire assay methods. Analyses are completed in Langley, British Columbia. Certified reference material standards and blanks were inserted into the sample stream, and internal standards and blanks were concurrently analyzed by the laboratory. All data are reported and certified by MSALABS.

Qualified Person

The scientific and technical information in this press release has been reviewed and approved by Frank Santaguida, Ph.D., P.Geo. Mr. Santaguida is Vice President, Exploration for Errington Metals Corp. and is a qualified person under National Instrument 43-101.

Table 2:(EQNX::nobreakspace)Drill hole collar locations.

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