Mr. Wayne Hubert reports

INZINC ANNOUNCES PHASE 2 DRILL PROGRAM TO EXPLORE FOR FURTHER EXTENSIONS OF 700 M TREND OF NEAR SURFACE MINERALIZATION AT INDY SEDEX PROJECT, CENTRAL BC

Inzinc Mining Ltd. will commence a phase 2 2025 diamond drill program in September at its 100-per-cent-owned Indy sedex (sedimentary exhalative) (zinc-lead-silver-barite) project, well located 90 kilometres (km) southeast of Prince George in central British Columbia, Canada. Drilling will follow up on a successful phase 1 program (11 holes, 1,089 metres (m)) that extended the B-9 mineralized trend by over 40 per cent to 700 m in length.

The B-9 trend remains open for further exploration along trend and at depth. Untested soil geochemical and EM (electromagnetic) geophysical anomalies continue for at least 750 m to the north of the B-9 trend. Drilling to date has tested just 10 per cent of the prospective 7.5 km main trend.

Phase 2 drilling

Drilling is planned to recommence on or around Sept. 11. An additional seven to 10 planned drill holes will explore for the northern and southern extensions of the B-9 trend.

Highlights of phase 1 drilling results

In phase 1, shallow drilling extended the near-surface B-9 mineralized trend from 450 m to greater than 700 m in length. All 2025 drill holes across the B-9 trend reported mineralization at the principle mineralized horizon, with nine holes returning mineralization above grade/width cut-off criteria (more than 1 per cent zinc (Zn) over two m). All intersections defining B-9 mineralization, including drilling prior to 2025, occur within 120 m of surface.

Near-surface massive sulphides averaging 11.0 per cent Zn, 2.3 per cent lead (Pb) and 27.1 grams per tonne (g/t) silver (Ag) over 3.0 m from 61.0 m downhole were intersected in hole IB25-029 (news release dated Aug. 18, 2025). Gallium, a critical mineral, was also identified in a massive sulphide sample from hole IB25-029.

The widest intersection to date, averaging 3.3 per cent Zn, 0.7 per cent Pb and 7.4 g/t Ag over 19.1 m from 29.9 m downhole, including a high-grade zone averaging 8.5 per cent Zn, 2.1 per cent Pb and 21.3 g/t Ag over 2.0 m from 31.0 m downhole, was intersected in hole IB25-032 (news release dated Aug. 21, 2025). The intersection is located 30 m updip (west) of the 2018 massive sulphide discovery (IB18-009, news release dated Nov. 13, 2018), averaging 8.0 per cent Zn, 2.0 per cent Pb and 16.2 g/t Ag over 9.9 m from 78.1 m downhole.

The continuity of the principle mineralized horizon has been demonstrated to a depth of 120 m in hole IB25-038 (3.3 per cent Zn, 0.3 per cent Pb and 2.6 g/t Ag over 4.2 m) and remains open downdip (news release dated Sept. 4, 2025). In the same hole, a second, shallower mineralized horizon was intersected (3.2 per cent Zn, 0.4 per cent Pb and 2.6 g/t Ag over 3.2 m from 86.6 m downhole), and is also present in adjacent drill holes to the north and south. The mineralized envelope is recognized by its distinctive radiolarian-type replacement mineralization.

Sedex district in central B.C.

The extensive tenure at Indy covers 200 square km and a 30 km length of underexplored strata in central B.C. The project is well located with respect to road, rail, power, port and smelter infrastructure.

The near-surface mineralization (zinc-lead-silver and barite) discovered across the 7.5 km main trend is typical of worldwide sedex deposits and districts. These deposits often include significant silver and critical minerals as byproducts.

About Inzinc Mining Ltd.

Inzinc is an active explorer at its Indy sedex project (100 per cent) in central B.C., Canada. The company is exploring near-surface zinc-lead-silver and barite mineralization discovered at Indy in a new, underexplored mineral region analogous to the prolific Selwyn basin of northeastern B.C. and Yukon. South32 Ltd. became a major tenure holder in the Indy belt by staking approximately 200 square km of adjacent claims in late 2021. Through its equity investment in American West Metals and a 50-per-cent royalty interest (NSR (net smelter return)) from any future production of indium mined at American West's West Desert project, Inzinc is also exposed to a portfolio of North American base metals and precious metals projects.

Qualified person

Patrick McLaughlin, PGeo, an independent qualified person as defined in National Instrument 43-101, Standards of Disclosure for Mineral Projects, and a registered professional geoscientist in British Columbia, has approved the technical content of this news release.

Quality assurance/quality control (QA/QC)

HQ drill core was collected from the drill site and delivered to the Indy camp by Inzinc staff. The core was logged, sample intervals were outlined and photographic records were collected. Core samples were split using a diamond saw or manually chipped at the camp, with one-half of the core submitted for assay and the remainder stored in wooden core boxes. The core was bagged in individually marked plastic sample bags and shipments were compiled in labelled rice bags. Core shipments were delivered by Inzinc contract geologists to Bandstra Transportation Systems Ltd. in Prince George, B.C., for furtherance to MSA Labs in Langley, B.C., Canada, for analysis. Samples were prepared by MSA and analyzed by ICP-AES (inductively coupled plasma atomic emission spectroscopy) multielement plus four-acid digestion and select AAS-fire assay (atomic absorption spectroscopy). In addition to the labs QA/QC procedures, Inzinc inserted blind standards, blanks or lab-directed duplicates by special instruction -- every 10th sample. The results from the QA/QC samples were within industry norms.

We seek Safe Harbor.