Errington Metals Continues to Expand Mineralization at the Balfour Zone

THUNDER BAY, ON, Aug. 18, 2026 /CNW/ -- Errington Metals Corp. (TSXV: EM) ("Errington" or the "Company") is pleased to announce results from 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.

Figure 1: Location of the drill holes at Balfour reported here.

Figure 2: 3D geological model with 2026 drill intersections at Balfour. 3D view looking west and inclined downward illustrating the interpreted relationship between the West and Main mineralized zones.

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 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 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 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 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 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: "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."

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¹ True widths are expected to be 70% to 100% of drilling widths listed in the table. Cu Eq is copper equivalent calculated as  Cu (%) + Zn (%) x 0.273 + Pb (%) x 0.167 + Ag (gpt) x 0.0081 + Au (gpt) x 0.6752. Metal prices used Copper $4.5/lb ($9921/tonne), Zinc $1.3/lb ($2866/tonne), Lead $0.90/lb ($1984/tonne), Gold $2500/oz, Silver $30/oz, Recoveries are set at Copper 90%, Zinc 85%, Lead 75%, Gold 75%, and Silver 75%. Copper equivalent values are provided for illustrative purposes only. No allowance has been made for payability, smelter terms, refining charges, penalties, or deleterious elements.

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.

Hole Number	Zone	From (m)	To (m)	Width (m)	Cu (%)	Zn (%)	Pb (%)	Au (gpt)	Ag (gpt)	CuEq (%)
EMB-26-048	North	179.9	188.3	8.3	0.98	2.73	0.98	0.34	32.3	2.55
EMB-26-048	North	248.5	255.0	6.5	0.49	4.13	2.01	0.59	111.5	3.60
EMB-26-049A	North	91.5	94.2	2.7	0.32	3.23	0.95	0.13	36.3	1.92
EMB-26-050	North	226.4	229.3	3.0	0.06	0.08	0.16	0.53	40.1	0.88
EMB-26-051	North	208.0	210.0	2.0	0.07	0.01	0.02	0.02	6.5	0.15
EMB-26-052	North	279.5	281.0	1.5	0.02	2.54	1.43	0.02	30.1	1.35
EMB-26-053	West	51.3	55.0	3.8	1.12	3.71	1.00	0.09	73.5	3.18
EMB-26-058	West	143.0	150.2	7.2	1.40	4.99	3.51	0.24	146.4	5.10
EMB-26-059	West	167.6	178.0	10.4	0.52	4.78	2.15	0.25	102.6	3.51
EMB-26-059	West	196.0	204.6	8.6	0.13	1.69	0.66	0.06	19.0	0.99
EMB-26-060	West	121.2	126.1	4.9	1.45	6.97	2.87	0.20	101.0	5.20
EMB-26-061	West	154.5	165.7	11.2	0.33	1.44	0.71	0.06	30.4	1.23
includes		154.5	156.7	2.2	1.22	5.00	2.19	0.17	85.0	4.07
EMB-26-062	West	179.5	180.0	0.5	0.05	2.02	1.11	0.14	20.2	1.17
EMB-26-072A	West	217.7	219.8	2.2	0.98	4.18	1.52	0.17	72.0	3.33
EMB-26-073	West	248.5	257.3	8.8	0.71	3.61	1.20	0.16	61.1	2.72
EMB-26-074	West	142.5	143.6	1.1	0.07	2.73	1.17	0.24	20.1	1.49
EMB-26-074	West	146.5	148.7	2.2	0.13	2.50	1.23	0.15	34.7	1.56
EMB-26-064	Main	91.2	93.5	2.3	0.02	1.30	0.54	2.04	26.1	2.31
EMB-26-066	Main	199.0	200.3	1.3	0.59	4.50	1.53	0.07	132.9	3.52
EMB-26-069	Main	231.7	236.6	4.9	0.24	5.19	3.24	0.31	226.3	4.72
EMB-26-070	Main	384.1	385.9	1.8	0.36	1.97	0.84	0.22	46.1	1.71
EMB-26-070	Main	393.3	395.3	2.0	0.22	5.27	1.79	0.08	38.0	2.58
EMB-26-071	Main	356.4	362.0	5.6	0.96	9.71	3.79	0.23	120.7	5.92
EMB-26-071	Main	373.6	380.8	7.2	0.38	1.89	0.56	0.07	17.8	1.28

1.	Intervals reported are downhole depths. True width represents 70%-100% true width as drill holes are designed perpendicular to the regional stratigraphic orientation.
2.	Cu Eq is copper equivalent calculated as  Cu (%) + Zn (%) x 0.273 + Pb (%) x 0.167 + Ag (gpt) x 0.0081 + Au (gpt) x 0.6752. Metal prices used Copper $4.5/lb ($9921/tonne), Zinc $1.3/lb ($2866/tonne), Lead $0.90/lb ($1984/tonne), Gold $2500/oz, Silver $30/oz, Recoveries are set at Copper 90%, Zinc 85%, Lead 75%, Gold 75%, and Silver 75%.
3.	Copper equivalent values are provided for illustrative purposes only. No allowance has been made for payability, smelter terms, refining charges, penalties, or deleterious elements.

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 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: Drill hole collar locations.

Hole Number	Easting	Northing	Elevation (m)	Depth (m)	Azimuth (deg)	Inclination (deg)
EMB-26-048	483590	5155425	267	300	359.5	-57.1
EMB-26-049A	483540	5155425	267	275.7	0.0	-60.0
EMB-26-050	483490	5155375	267	339	359.6	-65.4
EMB-26-051	483590	5155375	267	324	2.0	-63.3
EMB-26-052	483597	5155322	262	375	1.0	-70.5
EMB-26-053	482910	5155100	265	228	334.9	-61.3
EMB-26-058	482950	5155000	265	252	334.1	-60.4
EMB-26-059	483000	5155000	265	225	334.0	-61.4
EMB-26-060	482950	5155050	265	225	336.5	-63.1
EMB-26-061	483000	5155050	265	243	334.7	-61.0
EMB-26-062	483050	5155050	260	255	332.6	-60.8
EMB-26-063	483050	5155100	260	192	335.6	-60.2
EMB-26-064	483100	5155050	260	225	359.8	-60.6
EMB-26-066	483646	5155124	265	261	334.9	-55.1
EMB-26-068	483671	5155080	265	333	330.1	-60.5
EMB-26-069	483714	5155104	265	360	334.5	-64.8
EMB-26-070	483475	5154965	260	447	0.3	-59.5
EMB-26-071	483374	5154945	265	444	333.7	-61.2
EMB-26-072A	483000	5154950	265	252	335.0	-59.9
EMB-26-073	483015	5154900	265	330	332.0	-60.6
EMB-26-074	482910	5154900	265	300	335.1	-60.0

Easting and Northing listed are in UTM Zone 11N NAD83 co-ordinate system.

Cautionary Note Regarding Forward-Looking Information

This news release contains forward-looking statements and forward-looking information (collectively, "forward-looking statements") within the meaning of applicable securities laws. Any statements that are contained in this news release that are not statements of historical fact may be deemed to be forward-looking statements. Forward-looking statements are often identified by terms such as "may", "should", "anticipate", "will", "estimates", "believes", "intends", "expects" and similar expressions which are intended to identify forward-looking statements. Forward-looking statements are inherently uncertain, and the actual performance may be affected by a number of material factors, assumptions and expectations, many of which are beyond the control of the Company, including expectations and assumptions concerning the Company and its Sudbury Basin Project. Readers are cautioned that assumptions used in the preparation of any forward-looking statements may prove to be incorrect. Events or circumstances may cause actual results to differ materially from those predicted as a result of numerous known and unknown risks, uncertainties and other factors, many of which are beyond the control of the Company. Readers are further cautioned not to place undue reliance on any forward-looking statements, as such information, although considered reasonable by the management of the Company at the time of preparation, may prove to be incorrect and actual results may differ materially from those anticipated.

The forward-looking statements contained in this news release are made as of the date of this news release and are expressly qualified by the foregoing cautionary statement. Except as expressly required by securities law, the Company does not undertake any obligation to update publicly or to revise any of the included forward-looking statements, whether as a result of new information, future events or otherwise.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release. No stock exchange, securities commission or other regulatory authority has approved or disapproved the information contained herein.

SOURCE Errington Metals Corp.

For Further Information Please Contact: Matthew Gollat, President & CEO, Errington Metals Corp., Toll‑Free: 1‑888‑279‑1157, Direct: 1‑807‑577‑5785, [email protected], www.erringtonmetals.com