Mr. Murray Nye reports

NIOB'S NEWEST SEIGNEURIE ASSAYS SHOW HIGHER-GRADE HEAVY RARE EARTH MINERALIZATION

Assays from a second hole are in from North American Niobium and Critical Minerals Corp.'s Seigneurie project, and the dysprosium grades are nearly three times higher than in the first previously reported hole. Hole SGN-2026-003 also returned the highest niobium oxide grade from the drilling to date and copper. This confirms that the Seigneurie pegmatite system, located in Quebec's Grenville province, includes a higher-grade zone of mineralization that warrants follow-up.

"This is the intercept we were watching for at Seigneurie," said Murray Nye, North American Niobium's chief executive officer. "The niobium, dysprosium and copper grades are a clear step up from the first results we reported from the project and sit within the same pegmatite system. It is one hole, and the intervals are narrow, so we will let the assays and the updated geological model tell us what it means. However, this confirms that there is a higher-grade zone within the Seigneurie system, and that sharpens our targeting for the next phase of drilling."

SGN-2026-003 highlights:

• Niobium oxide: 4.75 metres averaging 863.58 parts per million niobium oxide (Nb2O5) from 71.15 to 75.90 m, the highest niobium grade reported from the Seigneurie drill program to date;
• Dysprosium oxide: the hole returned 2.0 m averaging 211.17 ppm dysprosium oxide (Dy2O3) from 73.20 to 75.20 m within the niobium interval, nearly three times the dysprosium grade reported from hole SGN-2026-007;
• Heavy rare earth oxide: the hole returned 7.7 m, averaging 946.25 ppm heavy rare earth oxide from 71.15 to 78.85 m;
• Copper: the hole returned 4.65 m averaging 910.89 ppm copper from 74.20 to 78.85 m, adding a base metal component to the mineralized system;
• Higher-grade zone confirmed: all four composites cluster within a pegmatite hosted in the quartzofeldspathic gneiss sequence, confirming a coherent higher-grade zone that will guide follow-up drilling;
• Next steps: completing assays for remaining Seigneurie drill holes, completing automated mineralogy study and updating geological model to target follow-up drilling of higher-grade zone.

The niobium, dysprosium, HREO and copper composites overlap within an approximately 7.7-metre zone from 71.15- to 78.85-metre core length centred on the pegmatite.

These results are from a single drill hole over narrow intervals, and additional work is required to determine whether the Seigneurie system hosts rare earth, niobium or copper mineralization of economic interest.

Composite intervals were calculated as length-weighted averages at cut-off grades of 500 ppm for Nb2O5, 100 ppm for Dy2O3, 500 ppm HREO and 500 ppm for Cu, with interval boundaries at or above the cut-off grade and a maximum of four metres of internal dilution.

Rare earth oxide values are derived from elemental laboratory assays using standard stoichiometric conversion factors. Reported intervals are core (downhole) lengths.

True widths have not yet been determined and will be estimated once the geological model is updated with the remaining drill hole data.

Drilling and geological context

Hole SGN-2026-003 was collared at 480732E 5381978N, UTM NAD83 Zone 18, and drilled at an azimuth of 10 degrees and a dip of approximately minus 45 degrees to a total depth of approximately 227 m.

The hole intersected a sequence dominated by quartzofeldspathic gneiss with intervals of gneiss, amphibolite and pegmatite. The higher-grade composites are hosted in and immediately below a pegmatite intersected at approximately 71.15- to 78.85-metre core length.

Next steps:

1. Complete assays for the remaining Seigneurie drill holes and update the geological model, including estimates of true widths;
2. Complete the automated mineralogy study to determine the mineral hosts and deportment of the rare earths and niobium;
3. Integrate the SGN-2026-003 results into targeting for follow-up drilling of the higher-grade zone;
4. Advance systematic exploration across the company's broader Quebec portfolio, prioritizing the highest-quality niobium and rare earth targets.

Quality assurance and quality control

Samples were submitted to SGS Canada Inc. Rare earth elements were determined by sodium peroxide fusion ICP-MS (SGS method GE-IMS91A50), niobium by fused-bead XRF (GO-XRF72NB) and copper by sodium peroxide fusion, nitric acid and ICPAES (GE-ICP91A50).

Within the mineralized interval, the yttrium assay result exceeded the laboratory's upper limit of detection (1,000 parts per million). A value of 1,000 ppm -- the maximum reportable concentration -- was used in calculating the reported HREO grade. As a result, the true yttrium content, and therefore the reported HREO grade of 946.25 ppm over 7.7 m, may be understated.

Quality control included certified reference materials, blanks and field duplicates inserted into the sample stream (approximately 13 per cent of submitted samples). The reported samples are NQ-size half-core, split along the core axis and sampled over intervals of approximately 0.5 to 1.0 m, with the remaining half-core retained for reference.

Core recovery through the mineralized intervals averaged approximately 90 to 98 per cent and is not considered to have materially affected sample representivity. SGS Canada is independent of the company and operates an ISO/IEC 17025-accredited analytical facility at Val d'Or, Que.

Qualified person

The scientific and technical information contained in this news release has been prepared in accordance with National Instrument 43-101 (Standards of Disclosure for Mineral Projects). Clyde McMillan, PGeo, a consultant to the company and a qualified person as defined under NI 43-101, has reviewed and approved the technical information contained herein.

The qualified person has verified the data disclosed in this release by reviewing the SGS Canada analytical certificates and the company's quality control results and reconciling the reported values to the laboratory certificates. No limitations to the data verification were identified.

About North American Niobium and Critical Minerals Corp.

North American Niobium is a North American mineral exploration company focused on the acquisition and development of precious, base and critical mineral assets. Its portfolio includes the Silver Lake property in British Columbia's Omineca mining division and a district-scale land package covering 29,936 hectares in Quebec's Grenville province. The Quebec properties host rare earth element, niobium and nickel-copper occurrences, expanding the company's footprint into critical minerals that are strategically important for energy and defence applications.

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