Mr. Murray Nye reports

NIOB SEIGNEURIE ASSAYS CONFIRM NIOBIUM MINERALIZATION IN HOLE SEVEN

North American Niobium and Critical Minerals Corp. has a complete picture for drill hole SGN-2026-007 at its Seigneurie project. Final assay results show niobium oxide at grades similar to those from SGN-2026-003 over an interval that is more than twice as long, as well as three metres of unexpected copper.

"We continue to receive results that will help us understand the economic potential of Seigneurie," said Murray Nye, North American Niobium's chief executive officer. "The niobium sits in the same intervals as we reported on July 3, and the copper zone deeper in the hole adds an unexpected component. At this early stage grade is not the whole story; what matters is how the niobium, copper and rare earths are distributed and which minerals carry them, and that is the work ahead."

SGN-2026-07 highlights

• Niobium oxide (Nb2O5): 10 metres from 128.00 m to 138.00 m averaging 842.3 parts per million and 7.3 m from 12.00 m to 19.30 m averaging 453 ppm;
• Copper (Cu): three m from 216.50 m to 219.50 m averaging 2,701.7 ppm, almost three times the grade of the copper found in SGN-2026-003;
• Next steps: an automated mineralogy (TIMA) study to identify the minerals hosting the niobium and rare earths of economic interest, as the company advances exploration across its broader Quebec portfolio to prioritize the strongest targets.

Detailed discussion

North American Niobium's Seigneurie project is in Quebec's Grenville province, known for hosting a variety of rare-earth element and critical minerals. This is the first time a company has applied a systematic drill program looking for rare earths or niobium to the pegmatite system at Seigneurie.

The Nb2O5 zones reported in this hole correspond to the dysprosium oxide/HREO intervals reported in the company's news release dated July 3, 2026. A correlation probably exists between the presence of niobium and ytrium, the predominant HREO element; the planned mineralogical analysis will determine the minerals hosting this mineralization. These results complement the higher-grade intervals returned by hole SGN-2026-003, located approximately 950 metres west of SGN-2026-007.

The copper interval lies deeper in the hole and is concentrated near the pegmatite contact with amphibolite rocks.

Composite intervals were calculated as length-weighted averages at cutoff grades of 400 ppm Nb2O5 and 500 ppm Cu, with interval boundaries at or above the cutoff grade and a maximum of four metres of internal dilution. Niobium 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.

Drilling and geological context

Hole SGN-2026-007 was collared at 481680E/5382081N and UTM NAD83 Zone 18. It was drilled at an azimuth of zero degrees and a dip of 45 degrees to a total depth of approximately 290 m.

The hole intersected an approximately 105.45-metre interval (63.85 to 169.3 m core length) of pink-to-red, K-feldspar-dominated pegmatite with 15 to 20 per cent smoky quartz and Ti-magnetite. Handheld radiometric readings within the pegmatite reached up to approximately 1,400 counts per second (indicative only -- not a measure of grade).

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, ICP-AES (GE_ICP91A50).

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 per cent and is not considered to have materially affected sample representivity.

SGS Canada Inc. is independent of the company and operates an ISO/IEC 17025-accredited analytical facility at Val d'Or, Que.

Next steps

The company's next step is mineralogical analysis to further understand the economic potential of Seigneurie:

1. Complete the automated mineralogy (TIMA) study to determine the mineral hosts and deportment of the rare earths and niobium;
2. If the REE-bearing minerals cannot be identified by TIMA, complete follow-up laser ablation ICP-MS or electron microprobe analyses.

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 Inc. 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. Results for approximately 5 per cent of the QA/QC samples remain under review.

About North American Niobium and Critical Minerals Corp.

North American Niobium and Critical Minerals 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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