Mr. Thomas Lamb reports

J2 METALS SAMPLES UP TO 1,030 G/T SILVER AT SIERRA PLATA; IDENTIFIES SEVEN VEINS AND ADVANCES TOWARD TRENCHING AND DRILLING

J2 Metals Inc. has provided an update on exploration at its Sierra Plata silver-gold-antimony project, located in the Taxco district of Guerrero state, Mexico. Since fieldwork began in late May, 2026, the company's crews have completed systematic geological mapping, prospecting and rock sampling across approximately half of the project area, identifying seven veins, locating 20 historical mine workings and returning multiple high-grade silver assays that will guide a first-ever trenching program.

Highlights:

• Best results from the 186 mapping rock samples collected to date include 1,030 grams per tonne silver (dump sample, El Sabino), 941 g/t Ag over 0.7 metre with 1.9 per cent lead and 4.3 per cent zinc (channel sample on the El Sabino vein trend), 811 g/t Ag over 1.4 m (channel, El Sabino) and 788 g/t Ag with 1.05 g/t gold (channel, El Salto);
• Seven veins identified to date, including the San Miguel vein; sampling has highlighted the El Salto and El Sabino veins as new priority areas for follow-up;
• Approximately 50 per cent of the Sierra Plata project area now mapped for geology, alteration and structure; silver mineralization is preferentially developed where veins are hosted in tuff and limestone;
• 20 historical mine workings located to date, including the El Sabino mine with more than 30 m of underground development on two levels;
• Trenching program being designed across the El Sabino, San Miguel, El Salto and El Resumidero veins, with trenches planned every 25 to 30 metres along strike; drill permitting is advancing in parallel;
• Drill permitting is in process to be able to test key targets in a maiden diamond drill program.

"The first two months of systematic work at Sierra Plata have exceeded our expectations," said Thomas Lamb, chief executive officer of J2. "We are seeing high silver grades not only at the historical mines that first attracted us to the district, but also on newly recognized structures such as the El Salto and El Sabino veins. With half the property still to be mapped, seven veins already defined and 20 historical workings located, we are moving quickly to trench top targets and to secure the permit for a first drill program. The work carried out to date by our technical team led by Carlos Cham in Mexico has been excellent and we are very excited by the results and discoveries being made."

Rock sampling program

A total of 186 rock samples (channel, chip, dump and float samples) have been collected from veins, mineralized structures and historical workings across the project, with assay results received for all samples. Selected best results are summarized in Table 1.

In addition to silver, several of the best samples carry significant base metal and antimony values, including 4.3 per cent zinc and 1.9 per cent lead in sample 798670 and 2.1 per cent zinc in sample 798548 (with 0.27 per cent antimony), and gold values of up to 3.34 g/t (sample 798568, El Salto).

Geological mapping

Slightly more than 50 per cent of the project area has now been mapped, outlining four principal rock types: limestone, black shale, andesitic tuff and a polymictic conglomerate. Mapping to date has suggested that veins return better silver assays where hosted in tuff or limestone, while mineralization is less well developed within the black shale. Alteration is dominantly argillic, with silicification developed near structures and lesser advanced argillic alteration also observed.

Veins and historical workings

Seven veins have been identified to date: San Miguel, El Trebol, El Salto, El Sabino, El Sabino Sur, El Resumidero and the El Sabino Sur splay. Of these, the San Miguel, El Sabino, El Salto and El Resumidero veins have returned the best results to date; additional sampling of the remaining veins is planned along different segments of their strike length. The company has also located 20 historical mine workings or prospect pits/adits on the project, including the El Sabino mine (more than 30 m of development on two levels), the El Salto mine (15 m of development plus a shaft), the San Miguel and La Noria mines, and numerous prospect pits and shafts. These old workings provide direct access to the mineralized structures for sampling and confirm the extent of historical mining activity across the district.

Next steps: trenching and drill permitting

With initial sampling results in hand, the company's priority is a first trenching campaign focused on the El Sabino, San Miguel, El Salto and El Resumidero veins, while mapping and rock sampling continue across the remainder of the project. Trenches are planned at 25-to-30-metre intervals along strike, depending on terrain, with locations guided by three-dimensional projections of the known veins generated in Leapfrog software from the structural measurements collected on each vein.

In parallel, the company is advancing the drill permit application for the project. The supporting documentation has been assembled, and the required government report is in preparation, while community engagement regarding drill-site access is continuing. Potential drill locations are being defined based on rock sampling results and preliminary data from the drone magnetic survey, which is approximately 50 per cent complete.

Qualified person

The technical content of this news release has been reviewed and approved by Graham Giles, PGeo, a technical adviser to J2, who is a qualified person as defined under National Instrument 43-101, Standards of Disclosure for Mineral Projects.

Sampling methodology and quality assurance/quality control

Samples were submitted to ALS in Zacatecas, Mexico, for preparation and analysis. Samples were prepped using ALS's PREP-31Y procedure, which involves crushing to 70 per cent passing two millimetres, using a rotary splitter to obtain a 250-gram sample and pulverizing it to 85 per cent passing 75 microns. Gold was analyzed by fire assay with AES finish (Au-ICP21), silver by Ag-OG62 and multielement geochemistry by ME-ICP61a.

About the Sierra Plata project

The Sierra Plata project is a 2,203-hectare silver-gold-antimony exploration project situated within Zacualpan, one of the most important historically productive epithermal mining districts in Mexico, and includes five past-producing high-grade mines localized along regionally extensive, structurally controlled vein corridors. Recent sampling of waste dumps at Sierra Plata returned grades of up to 3,932 g/t silver equivalent. Mineralization is hosted in quartz-dominant vein systems containing fine-grained sulphides with associated gold and antimony, reflecting a low to intermediate epithermal system with strong vertical metal zoning. Alteration assemblages, vein textures and metal associations observed at surface are consistent with upper-level exposure of the epithermal system, with historic mining largely confined to near-surface levels. The company anticipates identifying a large number of high-priority targets for drill evaluation.

Grant of stock options and restricted share units

The company also announces the grant of an aggregate of 1,775,000 stock options and 900,000 restricted share units (RSUs) to directors, officers and consultants of the company, in accordance with the terms of the company's new omnibus incentive plan approved by the board of directors on Aug. 22, 2026. The options are exercisable at a price of 15 cents per share for a period of five years and vest as to one-third on the date of grant, one-third six months from the date of grant and the remaining one-third 12 months from the date of grant. The RSUs vest as to one-third on each of the first, second and third anniversaries of the date of grant. The omnibus plan and the grants described herein remain subject to the company complying with all applicable requirements of the TSX Venture Exchange.

About J2 Metals Inc.

J2 Metals is a multicommodity explorer advancing silver, gold and antimony projects with historical production or significant drill results across established mining jurisdictions in Mexico, Quebec and Alaska. At Sierra Plata in Zacualpan, Mexico, one of the most historically productive epithermal districts in the country, recent waste dump sampling has returned grades of up to 3,932 g/t AgEq across five past-producing silver-gold mines. Active geological mapping and drill permitting are under way. At the Miniac project in Quebec's Abitibi greenstone belt, a newly completed 41-kilometre OreVision IP (induced polarization) survey has identified prospective chargeability and resistivity anomalies coincident with previously identified EM (electromagnetic) targets, supporting a planned phase II drill program of up to 5,000 metres across a largely untested seven-kilometre conductive horizon.

At the Napoleon project in the Fortymile district of Alaska, a prolific placer camp with up to one million ounces of historical gold production, rock-chip samples have returned up to 596 g/t gold, with historical drilling by Teck and Kennecott reporting intercepts of 8.9 g/t gold over three metres and 0.9 g/t gold over 79 metres.

We seek Safe Harbor.