Calgary, Alberta--(Newsfile Corp. - August 24, 2026) - Primary Hydrogen Corp. (TSXV: HDRO) (FSE: 83W) (OTCQB: HNATF) (the "Company" or "Primary") is pleased to announce that it has staked the Seagull North Project ("Seagull North" or the "Project"), comprising 313 contiguous single-cell mining claims covering approximately 65 square kilometres in the Thunder Bay Mining District of northwestern Ontario. The Project adjoins the northern boundary of the Seagull property, where a joint venture between Rift Minerals Inc. and Anteros Metals Inc. (CSE: ANT) is conducting one of Canada's first drill programs targeting natural hydrogen and helium alongside platinum group element mineralization.

Highlights

• 313 contiguous single-cell mining claims covering approximately 65 square kilometres adjoining the northern boundary of the Seagull property approximately 80 kilometres northeast of Thunder Bay

• 2026 drilling on the adjoining property has returned reported hydrogen-bearing gas results at depth, including a rush sample that assayed 0.65% (6,500 ppm) hydrogen (Anteros Metals Inc., May 27, 2026)¹

• The Seagull intrusion is a roughly 10-kilometre-diameter mafic-to-ultramafic body - a rock type associated with natural hydrogen generation through serpentinization - with more than 20,000 metres of historical drilling reported by the adjoining operators²

• Initial work program: compilation of historical drilling, geophysical and government geoscience data, and structural targeting across the Project

"The Seagull intrusion, a ten-kilometer ultramafic body, is a rock type which generates natural hydrogen through water-rock reactions, and recent drilling on the adjoining property has reported hydrogen-bearing gas from two holes, with the deeper geophysical target only just being reached," said David Jackson, Chief Executive Officer of Primary Hydrogen. "We took the open ground along the northern boundary in one contiguous block. When a system starts returning gas at depth, you want the ground beside it - and now we have it."

The Seagull North Project

Seagull North comprises 313 contiguous single-cell mining claims (claim numbers 1053009 through 1053321) registered on Ontario's Mining Lands Administration System, covering approximately 65 square kilometres in the Thunder Bay Mining District. The Project forms a single east-west block adjoining the northern boundary of the Seagull property, approximately 80 kilometres northeast of Thunder Bay in a road-accessible region that also hosts Impala Canada's Lac des Iles palladium mine. Compilation of government geoscience data will define the extent to which the Seagull intrusive system and its margin project onto the Company's claims.

The Adjoining Seagull Property

The Seagull property covers a roughly 10-kilometre-diameter Mesoproterozoic mafic-to-ultramafic intrusion of the Keweenawan Supergroup, emplaced into Archean Quetico Subprovince metasedimentary rocks within the Nipigon Embayment of the Midcontinent Rift. Anteros Metals Inc. has vested an initial 20% interest in the property and may earn up to a 49% interest under a joint venture agreement with Rift Minerals Inc.⁴

In 2026, the joint venture's deep drilling program returned the following (as reported by Anteros Metals):

• Drill hole WM08-27EXT intersected a pressurized gas occurrence at approximately 825 metres depth, with gas samples from that interval returning carbon dioxide up to 88.6%, nitrogen up to 0.76% and 0.04% (400 ppm) hydrogen, before the hole advanced to approximately 1,200 metres (May 27, 2026)¹

• A rush sample from drill hole WM00-05EXT, located 150 metres to the southwest and collected during hole repressurization, assayed 49.5% nitrogen, 44.2% carbon dioxide, 5.6% methane and 0.65% (6,500 ppm) hydrogen (May 27, 2026)¹

• Hole WM00-05EXT was subsequently completed to a depth of 1,449 metres, intersecting the eastern portion of a deep, low acoustic velocity geophysical target; Anteros reported that the relationship between the gases and that target is not yet resolved, and that it intends to seal all drill casings, install pressure gauges and release valves, and collect further gas seepage in pressurized stainless-steel canisters for analysis (June 8, 2026)³

Historical exploration on the Seagull property, as reported by the adjoining operators, includes more than 20,000 metres of drilling by prior operators that delineated nickel-copper-PGE mineralization along the intrusion's basal contact to depths of approximately 850 metres, and a historical drill hole that reportedly intersected pressurized, flammable gas near 850 metres depth.²

All results described above are company-reported by the adjoining operators and have not been independently verified by the Company. Historical results have not been verified by the Company. Hydrogen occurrences, mineralization and exploration results on adjacent properties are not necessarily indicative of the geology of, or the presence of natural hydrogen, helium or mineralization on, the Company's claims, and there can be no assurance that similar results will be obtained on the Project.

Geology and Exploration Thesis

Serpentinization - the reaction of water with iron-rich ultramafic rocks - is one of the principal geological processes understood to generate natural hydrogen, and radiogenic decay in Archean basement rocks is a recognized source of helium. The Company interprets the northern flank of the Seagull intrusive system as prospective for structurally controlled migration and accumulation of gases generated within or beneath the intrusion, with the intrusion's margins and associated faults representing potential pathways. These interpretations are conceptual: no drilling, sampling or geophysical surveying has been carried out by the Company on the Project, and no hydrogen, helium or mineral occurrence has been documented on the Project to date. Natural hydrogen exploration is an emerging field, and exploration methodologies for it continue to evolve.

Planned Work

The Company's initial program will comprise compilation of the extensive historical drilling and geophysical datasets covering the district, integration with Ontario Geological Survey mapping, and structural interpretation to define targets on the Project. A ground program will follow from that work.

LIFE Offering Update

The Company also announces that, further to its news releases dated June 4, 2026, June 23, 2026 and July 8, 2026, the Company has unwound and rescinded $10,000 worth of subscriptions previously completed on pursuant to the Company's non-brokered private placement that closed on July 8, 2026. In particular $5,000 worth of subscriptions by each of Martin Kowcun and William Timothy Heenan, both directors of the Company, were unwound and an aggregate of 16,666 units were cancelled and returned to treasury. The total number of units issued pursuant to the Offering is now 2,442,904 units for aggregate gross proceeds of $1,465,742 following the adjustment noted above.

Sources

1. Anteros Metals Inc. news release, May 27, 2026.
2. Anteros Metals Inc. news release, December 8, 2025; Anteros Metals Inc., "Technical Report on the Seagull Intrusion Project, Ontario Canada," dated effective June 29, 2026, prepared by G. Heggie, P.Geo., filed under Anteros Metals Inc.'s profile on SEDAR+.
3. Anteros Metals Inc. news release, June 8, 2026.
4. Anteros Metals Inc. news releases, April 15, 2026 and May 27, 2026.

About Primary Hydrogen Corp.

Primary Hydrogen is dedicated to the exploration and development of natural hydrogen resources. With projects in the U.S. and across Canada, the Company's portfolio includes the Blakelock, Hopkins, Mary's Harbour, Point Rosie, Crooked Amphibolite, Coquihalla, Cogburn and Northumberland projects. Primary has an option to acquire a 75% interest in a hydrogen-REE project known as Wicheeda North located in British Columbia.

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING INFORMATION

This news release contains "forward-looking information" and "forward-looking statements" within the meaning of applicable Canadian securities laws. Forward-looking statements in this release include statements regarding: the Company's planned data compilation, structural interpretation and targeting work on the Project and the timing thereof; the exploration potential and geological prospectivity of the Project; the Company's interpretation that the northern flank of the Seagull intrusive system may be prospective for the migration and accumulation of natural hydrogen and helium; the potential extension of the Seagull intrusive system and related structures onto the Company's claims; the Company's planned compilation and interpretation of historical drilling, geophysical and government geoscience data; the identification and prioritization of exploration targets; the timing and scope of planned follow-up ground exploration programs; and the Company's future exploration plans and objectives for the Project.

Forward-looking statements are based on a number of assumptions that, while considered reasonable by the Company at the date of this news release, are inherently subject to significant business, economic and competitive uncertainties and contingencies. Such assumptions include, without limitation: that planned exploration activities will proceed substantially as anticipated; that historical and publicly available geological and geophysical data relevant to the Project will be available and sufficiently reliable for the Company's planned compilation and interpretation work; that the Company's geological interpretations will provide a reasonable basis for identifying prospective exploration targets; that the Company will have sufficient financial, technical and other resources to fund its planned programs; and that applicable regulatory, economic and market conditions will remain supportive of the Company's exploration activities.

Forward-looking statements involve significant risks and uncertainties and are not guarantees of future performance. Such risks include, but are not limited to: the early-stage nature of the Project; the fact that no drilling, sampling or geophysical surveying has been conducted by the Company on the Project and no hydrogen, helium or mineral occurrence has been documented on the Project to date; the risk that hydrogen occurrences, mineralization or exploration results reported on adjacent properties are not indicative of the geology of, or the presence of natural hydrogen, helium or mineralization on, the Project; uncertainties associated with historical and third-party exploration information that has not been independently verified by the Company; risks inherent in natural hydrogen exploration, including the emerging and evolving nature of exploration methodologies; geological interpretation risk; exploration and operational risks; financing risks; and general economic, market and business conditions. Readers should not place undue reliance on forward-looking information. The Company undertakes no obligation to update forward-looking statements except as required by law.

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 release.

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