Vancouver, B.C., September 29, 2026 – TheNewswire - IDEX Metals Corp. (“IDEX” or the “Company”) (TSXV: IDEX; OTCQB: IDXMF) is pleased to announce tungsten re-assay results for the remaining four drill holes from the 2025 Phase I campaign at the Kismet target on the Company’s Freeze Property (“Freeze” or the “Property”) in western Idaho, USA. The results complete the sodium peroxide fusion (“SPF”) re-assay program announced on July 9, 2026, in which holes KSMT25002 and KSMT25005 returned 180.5 metres of 0.11% WO₃ and 72.2 metres of 0.13% WO₃ respectively.

Highlights

• Tungsten mineralization is present in all six 2025 Kismet drill holes, confirming that tungsten enrichment is a property of the Kismet system as a whole rather than a feature of the two initial test holes. 

• KSMT25001 returned 28.0 metres of 0.20% WO₃ from 220.0 metres, with 25.0 metres of 0.22% WO, and a separate 2.0 metres of 1.25% WO₃ from 264.0 metres that contains the highest-grade tungsten sample returned at Kismet to date: 1.0 metre of 2.13% WO₃ (16,900 ppm W). 

• KSMT25004 returned multiple zones of tungsten mineralization from surface to 333.25 metres, including 11.9 metres of 0.18% WO from 1.37 metres, 10.88 metres of 0.17% WO₃ from 32.61 metres, and 29.61 metres of 0.09% WO₃ from 301.05 metres. 

• Results for KSMT25002 and KSMT25005 are unchanged from those reported on July 9, 2026 and are included in Table 1 for completeness: 180.5 metres of 0.11% WO₃ from 52.0 metres in KSMT25002, including 17.05 metres of 0.22% WO₃ and 11.29 metres of 0.32% WO₃, and 72.2 metres of 0.13% WO₃ from 182.6 metres in KSMT25005, including 3.33 metres of 0.71% WO₃ and 1.21 metres of 1.55% WO₃. KSMT25005 also returned 47.69 metres of 0.12% WO₃ from 130.92 metres and 6.31 metres of 0.36% WO₃ from 61.97 metres. 

• The full comparison across 1,069 matched samples confirms that the original four-acid digestion materially understated tungsten in the higher-grade material in every hole. For instance, in KSMT25004 the peak SPF value of 6,420 ppm W corresponds to a four-acid value of only 722 ppm W. 

• 2026 drilling has defined more than 800 metres of strike, extending the Kismet corridor both laterally and across Hornet Creek. A full exploration update along with first assay results from the 2026 drilling program will be released in the coming weeks. 

“The first two re-assayed holes told us tungsten was real at Kismet. These four holes tell us it is everywhere we have drilled,” said Clayton Fisher, CEO of IDEX Metals. “KSMT25001 has now returned the highest tungsten grade on the Property, KSMT25004 carries tungsten from surface to more than 300 metres depth, and even the holes that sit on the margins of the system returned tungsten-bearing intervals. Kismet is a copper-molybdenum-tungsten system, and we are now building our 2026 targeting around that understanding.”

Completion of the Sodium Peroxide Fusion Re-assay Program

Figure 1. 2025 drillhole locations showing SPF holes that are reported in this news release and were reported previously (See July 9th, 2026 News Release).

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As described in the Company’s July 9, 2026, news release, the four-acid digestion used for the 2025 assays only partially dissolves scheelite (CaWO₄) and understates tungsten grades when scheelite is present in the core. Following the initial results from KSMT25002 and KSMT25005, the Company submitted the remaining four 2025 Kismet holes (KSMT25001, KSMT25003, KSMT25004 and KSMT25006) for SPF re-assay. In total 1,069 samples across the six holes have now been analysed by both methods.

The behaviour observed in the first two holes is repeated in the remaining four. Four-acid and SPF results are broadly comparable at low to moderate grades, but the four-acid method recovered a small and unpredictable fraction of the tungsten in the strongest samples. The largest discrepancies in the new holes were in KSMT25004 (SPF 6,420 ppm W versus four-acid 722 ppm W) and KSMT25003 (SPF 4,750 ppm W versus four-acid 1,020 ppm W). The highest-grade sample in the program, 16,900 ppm W in KSMT25001, was reported at 8,230 ppm W by four-acid digestion.

Table 1: Sodium peroxide fusion tungsten intervals with associated copper and molybdenum, 2025 Kismet drill holes KSMT25001 to KSMT25006

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*Intervals for KSMT25002 and KSMT25005 are as previously reported by the Company on July 9, 2026 and are unchanged. Intervals for KSMT25001, KSMT25003, KSMT25004 and KSMT25006 are reported at a 0.05% WO₃ cut-off. Tungsten, copper and molybdenum values are length-weighted averages of sodium peroxide fusion results only; results below the lower detection limit of the method (50 ppm) were assigned a value of zero and no four-acid values were substituted. * WO₃ was calculated by multiplying the W ppm values by 1.261.

Table 2: 2025 drillhole information KSMT25001 to KSMT25006

Why the Completed Re-assay Program Matters

1. Tungsten is present throughout the drilled portion of the Kismet system. Every 2025 hole, including the peripheral holes KSMT25003 and KSMT25006, returned tungsten above 0.05% WO₃, and four of the six holes returned intervals of more than 25 metres. 

2. High-grade tungsten is not confined to a single zone. Samples above 1% WO₃ now occur in four separate positions in three holes (KSMT25001, KSMT25002 and KSMT25005), and samples above 0.5% WO₃ in five holes. 

3. KSMT25004 demonstrates vertical continuity. Tungsten-bearing intervals occur from the top of the hole to 331 metres depth, spanning the copper-dominant upper portion and the molybdenum-dominant lower portion of the system. 

4. Tungsten grades in KSMT25002 and KSMT25005 suggest that enrichment may increase toward the north-northeast of the Kismet system. This trend will be tested in the 2026 program. 

Kismet System and the Kismet Corridor Exploration Model

The Kismet target is interpreted as an intrusion-centred magmatic-hydrothermal system within the Idaho Copper Belt. With SPF re-assays now complete for all 2025 holes, the down-hole metal zonation described in July is confirmed across the drilled area: copper is most strongly developed through the upper portions of the mineralized interval, molybdenum strengthens at depth, and tungsten is distributed across the system, bridging these domains and is locally concentrated in breccia zones carrying coarse scheelite. The Company continues to view Kismet as a polymetallic magmatic-hydrothermal system in which tungsten is a fundamental component rather than a by-product.

Near Term Catalysts

• Initial assay results from the first five holes of the 2026 drill program are expected in the coming weeks. 

• Results from the 2026 mapping, rock sampling and soil sampling programs are expected shortly thereafter. 

• Continued drilling across priority targets including North Breccia, Target A and Kismet  

QA/QC

The re-assay program was completed on previously sampled 2025 drill core pulps from the Kismet target area. Samples retained by AGAT from the previous program were re-submitted to AGAT Laboratories in Calgary, Alberta for tungsten analysis using sodium peroxide fusion with an ICP-OES finish (AGAT method 201-079). Reported tungsten, copper and molybdenum intervals are length-weighted average grades calculated over the sampled interval using only SPF values; individual SPF results returned below the lower analytical detection limit of the method (50 ppm W; 10 ppm Mo) were assigned a value of zero for the purpose of calculating length-weighted average grades, and no four-acid values were substituted. The Company considers this to be a conservative approach. Reported silver values were calculated from the previous 4-Acid analysis, as they were not reported in the SPF method used by the Company here. The 2026 core will be analysed by an alternate SPF method that will provide silver values that will be used in future calculations. WO₃ was calculated by multiplying the tungsten ppm value by 1.261. Intervals in Table 1 for KSMT25001, KSMT25003, KSMT25004 and KSMT25006 were composited at a 0.05% WO₃ cut-off with a maximum of 6 metres of continuous internal dilution and with the first and last samples of each interval above cut-off; “including” intervals were composited at a 0.10% WO₃ cut-off with a maximum of 3 metres of internal dilution. Intervals for KSMT25002 and KSMT25005 are reproduced without change from the Company’s July 9, 2026 news release. The upper limit of detection of the method for tungsten is 50,000 ppm (5%). A potential nugget effect continues to be evaluated. The Company’s QA/QC program includes the insertion of certified reference materials, blanks and duplicates, as appropriate.

Qualified Person

The scientific and technical information in this news release has been reviewed and approved for disclosure by David Hladky, P.Geo. (registered in Alberta), V.P. Exploration of IDEX Metals Corp. David Hladky is a “Qualified Person” for IDEX Metals Corp. within the meaning of National Instrument 43-101 – Standards of Disclosure for Mineral Projects.

About IDEX Metals Corp.

IDEX Metals Corp. is a mineral exploration company focused on advancing a portfolio of base and precious metal projects in Idaho, USA. IDEX is primarily focused on the exploration and development of the Freeze Copper-Gold porphyry prospect located in the newly discovered Idaho Copper Belt, Washington County, Idaho. With a strategic land position in a great mining jurisdiction and surrounded by major industry players, IDEX is committed to redefining district-scale exploration in Idaho.

For more information, please visit https://idexmetals.com/

ON BEHALF OF THE BOARD OF DIRECTORS

Clayton Fisher, CEO & Director

For further information regarding IDEX contact:

Investor Relations

info@idexmetals.com

1 (604) 260-0356

Cautionary Note Regarding Forward-Looking Statements

Statements contained in this news release that are not historical facts may be forward-looking statements. These forward-looking statements involve risks, uncertainties and other factors that could cause actual results to differ materially from those expressed or implied by such forward-looking statements. In addition, the forward-looking statements require management to make assumptions and are subject to inherent risks and uncertainties. There is significant risk that the forward-looking statements will not prove to be accurate, that the management’s assumptions may not be correct and that actual results may differ materially from such forward-looking statements. Accordingly, readers should not place undue reliance on the forward-looking statements. Generally forward-looking statements can be identified by the use of terminology such as “anticipate”, “will”, “expect”, “may”, “continue”, “could”, “estimate”, “forecast”, “plan”, “potential” and similar expressions. These forward-looking statements are based on a number of assumptions which may prove to be incorrect which, without limiting the generality of the following, include: risks inherent in exploration activities; the impact of exploration competition; unexpected geological or hydrological conditions; changes in government regulations and policies, including trade laws and policies; failure to obtain necessary permits and approvals from government authorities; volatility and sensitivity to market prices; volatility and sensitivity to capital market fluctuations; the ability to raise funds through private or public equity financings; environmental and safety risks including increased regulatory burdens; weather and other natural phenomena; and other exploration, development, operating, financial market and regulatory risks. The forward-looking statements contained in this press release are made as of the date hereof or the dates specifically referenced in this press release, where applicable. Except as required by applicable securities laws and regulation, IDEX disclaims any intention or obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by applicable securities laws. All forward-looking statements contained in this press release are expressly qualified by this cautionary statement.

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