NIOB.CN · 2026-02-17 12:00:00

Seigneurie Prospecting Results

Drill Results

North American Niobium Highlights 0.150% Nb₂O₅ with 124.53 ppm Dy₂O₃

from Pegmatite Grab Sample and 0.19% TREO from REE-Bearing

Carbonatite Outcrop at Seigneurie, Québec

Vancouver, British Columbia – February 17, 2026 – North American Niobium and Critical Minerals

Corp. (CSE: NIOB) (OTCQB: NIOMF) (FSE: KS82.F) (“North American Niobium” or the “Company”)

is pleased to report assay results from Phase 1 channel sampling and Phase 2 selective grab sampling completed

on its 100%-owned Seigneurie Project located in Longue-Rive (Haute-Côte-Nord), Québec.

The results include a high- grade niobium-dysprosium pegmatite grab sample returning 1,502 ppm Nb₂O₅

(0.1502%) with 124.5 ppm Dy₂O₃ and elevated tantalum, as well as a REE-bearing carbonatite outcrop

returning 0.19% TREO (including Y₂O₃).

Highlights

• Pegmatite grab sample (G170343): 1,502.02 ppm Nb₂O₅ (0.1502%) and 0.134% TREO which

includes 124.52 ppm Dy₂O₃, 14.04 ppm Dy2O3, 16.5 ppm HfO2 and 14.42 ppm Sc2O3.

• REE-bearing carbonatite grab sample (G170310): 0.19% TREO with 31.10267 ppm Dy₂O₃.

• Phase 1 channel sampling: A 15.0 m composite interval returned 294.39 ppm Nb₂O₅, and 0.039%

TREO (which includes 28.66 ppm Dy₂O₃ and 11.30 ppm HfO2.

• Channel sampling tested only the limited exposed surface outcrop and returned low-grade but

consistently anomalous Nb and Dy values.

• Geochemical signatures indicate alkaline affinity within immobile elements, while broader

chemistry remains to be evaluated; exploration is focused on vectoring toward a potential alkaline

core

• The Company is advancing Québec permitting to support drill testing targeted for Q1 2026, subject

to receipt of required approvals.

Phase 1 – Channel Sampling

Phase 1 was conducted between October 25 and October 27, 2025, consisting of two north– south oriented

channels totalling 94.5 metres across exposed pegmatite outcrop.

The best summarized interval represents a 15.0 m composite derived from continuous 1.5 m channel samples

(See Table 1).

The pegmatite is interpreted to strike approximately N80° with a steep southerly dip and remains open along

strike, width and at depth. Based on surface exposure and historical drill collar locations, the system may exceed

150 metres in apparent width, though this remains subject to verification by drilling.

Phase 2 – Selective Grab Sampling (109 Samples)

Phase 2 selective grab sampling expanded coverage to additional pegmatite and carbonatite outcrops. See table

2 and 3.

Pegmatite Highlights

G170343-B (Outcrop, Pegmatite)

• 1,502.02 ppm Nb₂O₅ (0.1502%)

• 124.53 Ppm Dy₂O₃

• 34.80 ppm Ta₂O₅

• 16.57 ppm HfO₂

• 16.25 ppm Sc₂O₃

• 0.1348% TREO

• HREO/TREO ratio: 0.94%

Carbonatite Highlight

G170310 (Subcrop, Carbonatite)

• 0.19% TREO

• 31.10 ppm Dy₂O₃

Grab samples are selective by nature and may not be representative of mineralization hosted on the Project.

Geological Interpretation

The pegmatite system at Seigneurie appears to strike approximately N80° with a steep dip to the south, based

on surface observations and review of historical reports. The system remains open along strike, at width and at

depth.

Historical drill collars from the previous drill campaign in 1978 have now been located in the field, and their

spatial relationship to current surface exposures suggests that the pegmatite intrusion may be significantly wider

than previously interpreted. Based on surface exposure and the position of these historical collars, the pegmatite

body may exceed 100 metres in width, and could potentially be wider than 150 metres, subject to confirmation

through drilling.

The geometry and scale observed to date suggest the body may represent either a pegmatite dyke and/or an

intrusion, though this remains interpretative and will require subsurface validation.

“Phase 1 channel sampling only tested the limited outcrop available at surface, and while the grades are modest,

the results consistently show notable niobium, dysprosium, hafnium and scandium.” said Murray Nye, Chief

Executive Officer. “Phase 2 has now returned a very encouraging pegmatite grab sample grading 0.15% Nb₂O₅

with notable dysprosium, hafnium and scandium, alongside a n REE-bearing carbonatite outcrop returning

0.19% TREO. Given the current market interest and pricing environment for dysprosium, hafnium and

scandium, this is an intriguing metal mix and warrants further work as we advance permitting and prepare for

drilling in 2026.”

Next Steps

The Company is progressing the required Québec exploration permits to support drilling and continued target

development. Integrated geochemical and structural interpretation is underway to prioritize targets for Q1 2026

drilling.

Sampling and Analytical Methods

Samples were submitted to ALS Laboratories for preparation and analysis. Samples were prepared using

standard crushing and pulverizing procedures targeting 70% passing 2 mm mesh and 85% passing 75 µm.

Analytical methods included ME-MS71L, ME-MS85, and additional method packages as noted in assay tables.

The Company is initiating a duplicate analysis program at a second laboratory to further support quality control

procedures.

Channel samples represent continuous sampling across exposed outcrop. Grab samples are selective by nature

and may not be representative of underlying mineralization.

Table 1: Channel sample 15m composite

Table 2: Grab samples associated with elevated niobium values (>400 ppm Nb2O5).

Sample Sample Y Y2O3 Nb Nb2O5 Dy Dy2O3 Tb Tb2O3 Hf HfO2 Sc Sc2O3 Ta Ta 2O5 Zr ZrO2 HREO/ TREO

type Length pm pct ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm p pm ppm pct TREO pct

(m)

G170202 Channel 1.5 Pegmatite 481623 5382108 251 0.0319 70.5 100.85 25.2 28.92 3.11 3.66 7 8 .26 9.4 14.42 2.72 3.32 217 0.029 0.763 0.059

G170203 Channel 1.5 Pegmatite 481623 5382106 181 0.023 258 369.07 27.7 31.79 3.36 3.95 14.9 17.57 0.66 1.01 11.05 13.49 365 0.049 0.947 0.039

G170204 Channel 1.5 Pegmatite 481622 5382106 189.5 0.0241 265 379.08 27.5 31.56 3.29 3.87 10.25 12.09 0.48 0.74 10.65 13 245 0.033 0.945 0.04

G170205 Channel 1.5 Pegmatite 481622 5382101 124 0.0157 122 174.52 15.7 18.02 1.875 2.21 8.17 9.63 0.69 1.06 5.59 6.83 196 0.026 0.946 0.025

G170206 Channel 1.5 Pegmatite 481621 5382100 178.5 0.0227 204 291.82 23.8 27.32 2.86 3.36 11.6 13.68 0.26 0.4 8.61 10.51 268 0.036 0.954 0.036

G170207 Channel 1.5 Pegmatite 481621 5382099 199.5 0.0253 266 380.51 28.6 32.82 3.47 4.08 11.5 13.56 0.7 1.07 8.38 10.23 278 0.038 0.947 0.042

G170208 Channel 1.5 Pegmatite 481621 5382098 183.5 0.0233 228 326.15 25.8 29.61 3.08 3.62 8.26 9.74 0.53 0.81 9.1 11.11 193.5 0.026 0.948 0.038

G170209 Channel 1.5 Pegmatite 481621 5382097 137.5 0.0175 167.5 239.61 18.6 21.35 2.28 2.68 5.33 6.29 2.14 3.28 6.17 7.53 137.5 0.019 0.945 0.028

G170210 Channel 1.5 Pegmatite 481621 5382096 180 0.0229 217 310.42 25 28.69 3.01 3.54 9.99 11.78 0.52 0.8 7.51 9.17 231 0.031 0.947 0.037

G170211 Channel 1.5 Pegmatite 481621 5382095 248 0.0315 260 371.93 31.8 36.5 3.87 4.55 8.82 10.4 0.96 1.47 10.05 12.27 202 0.027 0.95 0.05

15 0.0238 294.4 28.66 3.55 11.3 2.51 9.75 0.0315 93% 0.039

SAMPLE ID Rock code EASTING NORTHING

best interval over 15m