Niobay Confirms Extension of Mineralization ON Its Crevier Project and Intersects Rare Earth Elements IN Its Northernmost Holes
1
Press Release
TSX-V: NBY; OTCQB: NBYCF
NIOBAY CONFIRMS EXTENSION OF MINERALIZATION ON ITS CREVIER PROJECT AND INTERSECTS
RARE EARTH ELEMENTS IN ITS NORTHERNMOST HOLES
Montréal, Québec, September 11, 2025 - NioBay Metals Inc. (“NioBay” or the “Company”) (TSX-V: NBY) (OTCQB:
NBYCF) i s proud to announce the first results of the 2025 summer drill campaign (the “2025 Campaign”) on the
Crevier niobium (Nb) and tantalum (Ta) project (the “Crevier Project”), of which it owns 72.5%. The Crevier
Project is located approximately 50 km north o f the town of Girardville and approximately 150 km from the
Niobec mine. It is located in the Nitas sinan (or ancestral territory) of the Pekuakamiulnuatsh, whose main
population center is Mashteuiatsh.
First Results Received to Date from the 2025 Campaign
The Company completed the 2025 Campaign in August 2025. This 15-hole campaign, covered 3,324 m, consisted,
among other things, of verifying the continuity of mineralization in the northwest and southeast sectors. This
Campaign was made possible thanks to the participation of the Government of Qu ébec through the Mining
Exploration Support Program for Critical and Strategic Minerals of the Ministère des Ressources naturelles et
des Forêts (MRNF). The Company can confirm that mineralized zones have been intersected and the results for
these zones for the first eight drill holes are presented below. This information will be added to the historical
information and will be used to update a resource estimate. We can now observe the presence of mineralization
over more than 6 km. Other results will follow soon.
This campaign will also allow the recovery of mineralized material in order to conduct a second pilot test, which
is expected to represent more than 10 times the volume of the first pilot test. For Crevier in 2025, we still need
to collect a bulk sample in early fall, again with the goal of having representative material for the next pilot.
Table 1: Composites of Intercepted Mineralization for Nb2O5
Drill Hole From To Nb2O5 Length
(m) (m) % (m)
1532-25-01 116.10 126.00 0.2273 9.90
1532-25-01 128.50 132.50 0.2991 4.00
1532-25-02 214.00 218.05 0.3281 4.05
1532-25-02 221.90 226.10 0.1920 4.20
1532-25-02 227.00 233.15 0.2014 6.15
1532-25-02 247.90 251.15 0.1804 3.25
1532-25-03 107.45 115.00 0.2307 7.55
1532-25-03 117.25 118.25 0.2546 1.00
1532-25-04 99.10 100.15 0.2003 1.05
1532-25-04 166.85 169.95 0.2633 3.10
1532-25-04 176.20 177.20 0.3541 1.00
1532-25-04 189.50 200.80 0.2473 11.30
1532-25-04 221.60 225.65 0.1838 4.05
1532-25-04 230.00 231.00 0.1774 1.00
1532-25-06 88.65 89.70 0.2160 1.05
2
1532-25-06 197.85 201.65 0.2173 3.80
1532-25-06 203.60 208.05 0.1951 4.45
1532-25-06 237.40 239.40 0.2461 2.00
1532-25-06 252.80 254.00 0.1874 1.20
1532-25-07 63.45 64.50 0.1717 1.05
1532-25-07 71.50 72.50 0.3276 1.00
1532-25-07 108.00 113.00 0.1940 5.00
1532-25-09 297.00 298.00 0.1931 1.00
* Nb2O5 et Ta2O5 are oxide equivalents calculated based on Nb and Ta element lab results.
Table 2: Composites of Intercepted Mineralization for Ta2O5
Drill Hole
From To Ta2O5 Length
(m) (m) % (m)
1532-25-01 112.00 113.50 0.0159 1.50
1532-25-01 116.10 127.00 0.0223 10.90
1532-25-01 128.50 132.50 0.0314 4.00
1532-25-02 198.70 200.00 0.0330 1.30
1532-25-02 213.00 220.00 0.0247 7.00
1532-25-02 221.90 226.10 0.0192 4.20
1532-25-02 227.00 233.15 0.0226 6.15
1532-25-02 247.90 251.15 0.0144 3.25
1532-25-03 107.45 115.00 0.0231 7.55
1532-25-03 117.25 119.00 0.0206 1.75
1532-25-04 99.10 100.15 0.0225 1.05
1532-25-04 166.85 169.95 0.0223 3.10
1532-25-04 176.20 177.20 0.0426 1.00
1532-25-04 186.30 202.00 0.0250 15.70
1532-25-04 221.60 225.65 0.0170 4.05
1532-25-04 229.00 231.00 0.0175 2.00
1532-25-04 271.45 273.00 0.0102 1.55
1532-25-06 88.65 89.70 0.0222 1.05
1532-25-06 104.90 107.00 0.0131 2.10
1532-25-06 189.30 191.50 0.0151 2.20
1532-25-06 197.85 208.05 0.0213 10.20
1532-25-06 237.40 239.40 0.0128 2.00
1532-25-06 252.80 255.20 0.0164 2.40
1532-25-07 8.45 10.35 0.0229 1.90
1532-25-07 63.45 64.50 0.0119 1.05
1532-25-07 71.50 75.00 0.0159 3.50
1532-25-07 88.85 91.15 0.0113 2.30
1532-25-07 95.20 98.15 0.0118 2.95
1532-25-07 107.15 115.15 0.0185 8.00
1532-25-08 317.50 318.50 0.0106 1.00
1532-25-08 322.40 324.00 0.0124 1.60
3
1532-25-08 333.50 344.00 0.0185 10.50
1532-25-08 346.00 350.05 0.0123 4.05
1532-25-08 352.00 357.80 0.0143 5.80
1532-25-08 362.00 364.95 0.0190 2.95
1532-25-09 183.40 184.45 0.0123 1.05
1532-25-09 222.55 223.75 0.0112 1.20
1532-25-09 278.00 279.00 0.0145 1.00
1532-25-09 282.00 298.00 0.0198 16.00
* Nb2O5 are Ta2O5 are oxide equivalents calculated based on laboratory results for the elements Nb and Ta.
Table 3: Composites of Intercepted Mineralization for total rare earth elements (TREE)
Drill Hole From To REE total Length
(m) (m) ppm (m)
1532-25-08 105.70 110.35 1618 4.65
1532-25-08 368.50 369.65 1353 1.15
1532-25-09 76.30 77.66 1676 1.36
1532-25-09 93.65 95.65 1868 2.00
1532-25-09 112.60 113.80 1091 1.20
1532-25-09 174.20 177.45 1096 3.25
1532-25-09 179.70 185.80 1486 6.10
1532-25-09 188.10 197.45 1467 9.35
1532-25-09 212.55 216.60 1078 4.05
1532-25-09 219.25 220.90 1184 1.65
1532-25-09 342.30 343.40 1453 1.10
Table 4: Composites of Intercepted Mineralization for Sr (strontium)
Drill Hole From To Sr_ppm Length
(m) (m) (m)
1532-25-01 9.40 10.50 1200 1.10
1532-25-01 28.10 29.40 1202 1.30
1532-25-01 39.15 40.15 1440 1.00
1532-25-01 44.60 47.50 1221 2.90
1532-25-01 50.00 52.50 1352 2.50
1532-25-01 55.20 57.20 1475 2.00
1532-25-01 61.00 62.00 1030 1.00
1532-25-01 68.50 71.80 1228 3.30
1532-25-01 74.00 75.00 1540 1.00
1532-25-01 93.40 94.65 1460 1.25
1532-25-01 104.20 107.65 1107 3.45
1532-25-01 115.00 118.75 1156 3.75
1532-25-01 126.00 128.50 1137 2.50
1532-25-01 133.60 135.00 1170 1.40
1532-25-02 13.55 15.05 1410 1.50
1532-25-02 35.80 39.00 1369 3.20
1532-25-02 66.70 70.45 1221 3.75
4
1532-25-02 109.95 112.00 1101 2.05
1532-25-02 131.30 132.40 1118 1.10
1532-25-02 153.05 154.55 1620 1.50
1532-25-02 170.10 172.50 1223 2.40
1532-25-02 185.90 189.00 1444 3.10
1532-25-02 190.75 195.35 1858 4.60
1532-25-02 197.80 200.00 1177 2.20
1532-25-02 205.20 213.00 1421 7.80
1532-25-02 216.40 224.10 1563 7.70
1532-25-02 229.10 234.10 1317 5.00
1532-25-02 237.20 238.20 2320 1.00
1532-25-02 245.65 246.65 1090 1.00
1532-25-03 11.65 12.90 2500 1.25
1532-25-03 16.00 17.00 1300 1.00
1532-25-03 100.40 104.85 1046 4.45
1532-25-03 145.35 146.60 1546 1.25
1532-25-04 19.60 21.60 1141 2.00
1532-25-04 70.30 71.60 1450 1.30
1532-25-04 99.10 100.15 1540 1.05
1532-25-04 165.85 166.85 1010 1.00
1532-25-04 168.85 169.95 1100 1.10
1532-25-04 200.80 203.00 1476 2.20
1532-25-04 229.00 231.00 1210 2.00
1532-25-04 265.65 271.45 1359 5.80
1532-25-04 275.50 276.55 2750 1.05
1532-25-04 280.75 286.70 1113 5.95
1532-25-06 88.65 89.70 1660 1.05
1532-25-06 185.35 189.30 1004 3.95
1532-25-06 194.65 195.70 1330 1.05
1532-25-06 217.55 218.60 1240 1.05
1532-25-06 221.60 226.00 1390 4.40
1532-25-06 242.30 244.30 1073 2.00
1532-25-06 248.00 249.00 1020 1.00
1532-25-06 250.00 252.80 1001 2.80
1532-25-07 30.50 31.65 1100 1.15
1532-25-07 59.00 60.00 1190 1.00
1532-25-07 97.50 100.90 1046 3.40
1532-25-07 115.15 116.65 1302 1.50
1532-25-08 14.50 17.00 3676 2.50
1532-25-08 36.70 37.70 1485 1.00
1532-25-08 46.30 47.70 4761 1.40
1532-25-08 68.85 72.50 1982 3.65
1532-25-08 104.00 113.25 4583 9.25
1532-25-08 138.10 140.80 3837 2.70
1532-25-08 143.25 146.35 3211 3.10
1532-25-08 177.60 179.35 2443 1.75
5
1532-25-08 266.70 269.50 1778 2.80
1532-25-08 303.35 305.15 3868 1.80
1532-25-08 312.10 315.50 2393 3.40
1532-25-08 316.50 318.50 1170 2.00
1532-25-08 322.40 326.80 1884 4.40
1532-25-08 332.50 333.50 1670 1.00
1532-25-08 335.00 336.00 1100 1.00
1532-25-08 345.05 357.80 1678 12.75
1532-25-08 362.70 366.20 1972 3.50
1532-25-08 368.50 369.65 5750 1.15
1532-25-08 372.10 379.70 3142 7.60
1532-25-09 41.40 44.40 2794 3.00
1532-25-09 57.10 59.75 2136 2.65
1532-25-09 76.30 77.66 8500 1.36
1532-25-09 82.55 85.90 3811 3.35
1532-25-09 93.65 95.65 7940 2.00
1532-25-09 108.00 109.50 3663 1.50
1532-25-09 112.60 118.30 3616 5.70
1532-25-09 174.20 185.80 4775 11.60
1532-25-09 187.00 198.45 5273 11.45
1532-25-09 210.00 213.10 2245 3.10
1532-25-09 213.50 224.65 4198 11.15
1532-25-09 276.00 277.00 1040 1.00
1532-25-09 280.00 283.00 1008 3.00
1532-25-09 342.30 343.40 8830 1.10
1532-25-09 367.45 371.60 2556 4.15
6
Figure 1: Map of the 2025 Drilling Campaign
A Word from the President and CEO of NioBay Metals on Crevier
“We are pleased to announce the initial drill results received, and to note that the mineralized zone is still open
to the northwest as well as to the southeast of the known zone, ” said Jean-Sébastien David, P.Geo., President
and CEO of NioBay. “ We also intercepted rare earths mineralization in our northernmost drill ho les, with a
marked presence of strontium. Furthermore, the campaign went very well and allowed us, once again, to sample
mineralized material that will be used for our next pilot. The mineralized zone now extends over a strike length
of more than 6 km. The new resource estimate will allow us to better qualify the drill results obtained.”
Following the completion of studies indicating positive parameters for this project, Crevier will be exclusively
dedicated to the production of niobium oxide for battery manufacturers.
Qualified person
This press release has been reviewed and approved by Jean -Sébastien David, P.Geo., a Qualified Person under
National Instrument 43-101. Mr. David is President and CEO of NioBay Metals Inc.
About NioBay Metals Inc.
NioBay aims to become a leader in the development of mine(s) with low carbon consumption and responsible
water and wildlife management practices while prioritizing the environment, social re sponsibility, good
governance, and the inclusion of all stakeholders. Our top priority, which is critical to our success, is the consent
and full participation of the Indigenous communities in whose territories and/or on ancestral lands we operate.
In addition to others properties, NioBay holds a 100% interest in the James Bay Niobium Project located 45 km
south of Moosonee, in the Moose Cree Traditional Territory of the James Bay Lowlands in Ontario. NioBay also
holds a 72.5% interest in the Crevier Niobiu m and Tantalum project located in Québec and on the Nitassinan
7
territory of the Pekuakamiulnuatsh First Nation. The Company has also the option to acquire a 80% interest in
the Foothills project, a titanium-phosphate project located near the former St-Urbain mine site in Québec.
About Niobium
Niobium is a naturally occurring element. It is a metal that is ductile, malleable and highly resistant to corrosion.
Because it enhances properties and functionalities, niobium is used in a wide range of materials and applications
in the Mobility, Structural and Energy sectors. Niobium transforms materials. When added to materials like steel,
glass and aluminum castings, niobium makes them more efficient and lowers environmental impacts, while also
increased value.
Cautionary Statement
Certain statements in this press release constitute “ forward-looking information” under applicable Canadian
securities laws, including statements regarding the Company's plans. These statements are necessarily based on
a number of beliefs, assumptions and opinions of management as of the date they are made and are subject to
numerous risks and uncertainties that could cause actual results and future events to differ materially from those
expressed or implied in such statements. The Com pany undertakes no obligation to update these forward -
looking statements if management's beliefs, estimates or opinions, or other factors, should change, unless
required by law.
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies
of the TSX Venture Exchange) accept responsibility for the adequacy or accuracy of this release.
FOR MORE INFORMATION, CONTACT:
NioBay Metals Inc.
Jean-Sebastien David, geo.
President & Chief Executive Officer
Tel.: 514 866-6500
www.niobaymetals.com
Kimberly Darlington
Investor Relations
Tel: 514-771-3398