Brunswick Exploration Inc. (TSX-V: BRW) (OTCQB: BRWXF) (FRANKFURT:1XQ) is pleased to announce the assays of the previously announced 302-metre interval (see press release dated October 15 2026) at its Anatacau Main Project, located 20 km east of Rio Tinto’s Galaxy project, in the Eeyou Istchee James Bay region of Quebec.

Highlights include:

• Results confirm the mineralization of the Anais dyke observed in drill hole AN-26-17 with an intercept of 302.05 meters returning 1.73% Li2O from 295.25 to 597.30 meters.
• Higher grade core of 142 meters grading 1.97% Li2O from 426 to 568 meters.
• Amongst the best lithium intercepts on a grade-meter basis drilled in the lithium industry since 2015.
• The Anais dyke remains open in all directions.

Mr. Killian Charles, President and CEO of BRW, commented: “Since the start of September, we have entered a new, exciting chapter for Brunswick Exploration. Anatacau is proving to be something exceptional with a combination of grade and width that is rarely seen across the entire lithium sector. It vindicates our exploration methodology and our ability to uncover meaningful discoveries.

Importantly, it is only the start. We are eagerly awaiting to restart drilling and are currently preparing a major exploration campaign at Anatacau to fully demonstrate the potential of the project. More information on this campaign will be shared when available.”

Figure 1: Surface Map of the Anatacau Main Project and Drill Holes Completed

Figure 2: Cross Section A-A’ (see Figure 1 for Location)

Figure 3: Representative Core Photo of Main Interval at Anais

Figure 4: Regional Map of the Anatacau Main and Anatacau West Projects

Discussion of Results

Hole AN-26-17 intercepted 302.05 meters of nearly continuous pegmatite grading 1.73% Li₂O from 295.25 to 597.30 meters including a 142 meters sub-interval grading 1.97% Li₂O from 426 to 568 meters. Located approximately 100 meters (80 to 160 meters) below hole AN-26-15, which returned 1.31% Li₂O over 202 meters, lithium mineralization is confined to medium to coarse grained spodumene within the pegmatite. The entire pegmatite interval is mineralogically simple and homogenous. It is composed of quartz, spodumene, K-feldspar, albite and a low concentration of accessory minerals such as tourmaline, muscovite, garnet, apatite and traces of pollucite. The high-grade portion of hole AN-26-17 is associated with occurrences of cleavelandite and weak potassic alteration alongside fresh and more abundant spodumene mineralization (see figure 3). The plunge of the dyke appears to change from approximately 70 degrees at surface to 45 degrees at depth but the full geometry of the dyke remains to be confirmed with further drilling.

The true thickness of the Anais dyke is estimated at approximately 80% of the 302-metre interval, and the interval contains approximately 3% host-rock xenoliths highly altered by holmquistite. The hole ended in a LCT pegmatite and was stopped due to the drill rig’s depth capacity.

Assays result from hole AN-26-14 and AN-26-16, drilled outside of the Anais dyke, remain pending as well with the rest of hole AN-26-17 which intercepted several other pegmatites.

Table 2: Drill Hole Collars (UTM Nad83, Zone 18N)

Note

SEC Technical Report Summary for the James Bay Lithium Project prepared by SLR Consulting (Canada), Wave International Pty and WSP Canada for Arcadium Lithium Plc., dated August 31, 2023.

QAQC

All drill core samples were collected under the supervision of BRW employees and services contractor Explo-Logik, applying industry-standard QA/QC procedures to its drilling and prospecting programs. All sample preparation and analytical work were performed by Agat Laboratories. Samples were prepared with methods 200075 and 200087 and dissolved in a sodium peroxide solution, prior to multielement analysis by ICP-OES and ICP-MS according to the Agat method 201378. All results passed the QA/QC screening at the laboratory, and all inserted standard, duplicates and blanks returned results within acceptable limits.

Qualified Person

The scientific and technical information contained in this press release has been reviewed and approved by Mr. Simon T. Hébert, VP Development. He is a Professional Geologist registered in Quebec and is a Qualified Person as defined by National Instrument 43-101.

About Brunswick Exploration

Brunswick Exploration is a Montreal-based mineral exploration company listed on the TSX-V under symbol BRW. The Company is focused on grassroots exploration for lithium in Canada, a critical metal necessary to global decarbonization and energy transition. The company is rapidly advancing the most extensive grassroots lithium property portfolio in Canada, Greenland and Saudi Arabia underpinned by its Mirage project, one of the largest undeveloped hard-rock lithium Inferred Mineral Resource Estimate in the Americas, with 52.2Mt grading 1.08% Li2O.

Investor Relations/information

Mr. Killian Charles, President and CEO (info@BRWexplo.com)

Contact number: 514 861 4441

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release