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Sun Summit Completes Over 16,000 Meters of Drilling at the JD Project, Toodoggone Mining District, B.C.

Exploration Programs

Sun Summit Completes Over 16,000 Meters of

Drilling at the JD Project, Toodoggone Mining

District, B.C.

Vancouver, British Columbia--(Newsfile Corp. - September 15, 2026) - Sun Summit Minerals

Corp. (TSXV: SMN) (OTCQB: SMREF) (

"Sun Summit"

or the

"Company"

) is pleased to announce

that its 2026 exploration drill program at the Company's JD Project, Toodoggone Mining District, north-

central British Columbia is now finished. Over 16,000 meters of drilling were completed at the Creek,

Finn and Schmitt Zones across 55 drill holes, with assays pending.

This represents approximately 60%

more work than originally planned, driven by exceptional productivity, encouraging results from field

activities, and supported by an oversubscribed private placement financing completed late in August

2026 (

August 26

th

, 2026, News Release

).

Highlights:

Transformational Drill Program:

The largest single-season drill program ever initiated at the JD

Project is now complete. A total of 55 drill holes over 16,000 meters were drilled across the Creek,

Finn and Schmitt Zones, highlights include:

Creek Zone:

21 drill holes for approximately 7,400 meters covered an area of

approximately 650 by 300 meters, with holes designed to follow-up significant previous

results, including

81.0 meters of 4.80 g/t gold

in drill hole CZ-25-021 (

November 25

th

,

2025, News Release

).

Finn Zone:

19 drill holes for approximately 5,400 meters covered an area of approximately

650 by 600 meters, with holes designed to follow-up significant previous results, including

17.0 meters of 2.31 g/t gold

with

113.1 g/t silver

in drill hole FZ-25-002 (

January 22

nd

,

2026, News Release

).

Schmitt Zone:

15 drill holes for approximately 3,200 meters covered an area of

approximately 350 by 150 meters, with holes designed to investigate the western extent of

Finn Zone-style gold-silver mineralization along the sparsely tested Schmitt zone.

All holes

drilled in the Schmitt Zone intersected local zones of strong brecciation and

alteration similar to the western strike-extent of Finn Zone-style mineralization

known to host gold-silver mineralization.

Results Pending:

Logging and sampling of drill core is ongoing, with samples continuing to

be submitted for analysis. Assay results will be released as they are received, reviewed and

interpreted.

Focused Drill Program:

Results from the completed drill program, including results from drilling

at the Schmitt Zone, will contribute to inaugural mineral resource estimates planned for Q1 of 2027.

Target generation;

A project-wide airborne mobile magnetotelluric (MobileMT) survey was

completed across the entire JD Project (

July 14

th

, 2026, News Release

). Preliminary results from

this survey were used to design an IP (induced polarization) geophysical survey which will

commence shortly.

Project-Wide Geophysical Surveying Ongoing:

A focused, induced polarization geophysical

survey is set to commence in the coming days. This survey will focus primarily on priority target

areas along the JD Porphyry trend. Results will be used to refine high-priority drill targets on

several zones including McClair Creek, Belle South and Moosehorn.

Metallurgical report expected in early Q4, 2026:

Fuse Advisors Inc. ("

Fuse

") and Blue Coast

Research Ltd. ("

BCR

") were engaged in April 2026 to complete an initial metallurgical test

program for the Creek and Finn zones at the Company's JD Project in the Toodoggone Mining

District, north-central British Columbia.

Results of the report are expected in the coming weeks.

"Completing 55 drill holes and over 16,000 meters of drilling across Creek, Finn, and the newly tested

Schmitt Zone is a significant milestone for Sun Summit and for the JD Project. The results we saw from

several western Finn Zone holes gave us the confidence to expand the program and put 15 additional

holes into the Schmitt Zone. We are encouraged that every hole drilled in the Schmitt Zone intersected

mineralization. We are now focused on receiving and reporting assay results through year-end, with our

inaugural mineral resource estimates for Creek, Finn, and Schmitt targeted for Q1 2027. I want to thank

our exploration team and field partners for their exceptional work this season. A perfect safety record of

3,300 person days with no lost time accidents and efficiency in the field is what allowed us to expand the

drill program well beyond its original scope."

— Niel Marotta, CEO, Sun Summit Minerals

Completed Over 16,000 Meter Drill Program in 2026

The recently completed drill program at the JD project was primarily designed to inform an inaugural

mineral resource estimate, anticipated to be released in Q1 of 2027 (see

May 5

th

, 2026, News

Release

). Camp was mobilized in late May, drilling commenced June 3

rd

, 2026, and continued through

early September with two drill rigs operating throughout the program.

Details of the drill program include:

Creek Zone:

21 drill holes for approximately 7,400 meters covered an area of approximately 650

by 300 meters to a vertical extent of approximately 350 meters (Figure 1). Drill holes were

designed to systematically evaluate the modelled vein-controlling structures by testing the extent

and continuity of near-surface, high-grade and bulk-tonnage gold mineralization. Drilling followed-

up significant previous results, such as

81.0 meters of 4.80 g/t gold

, including

34.0 meters of

9.07 g/t gold

in drill hole CZ-25-021 (

November 25

th

, 2025, News Release

). Results from this

phase of drilling should inform grade continuity, the down-dip and strike-extents of mineralization

and presence of additional high-grade zones.

Finn Zone:

19 drill holes for approximately 5,400 meters covered an area of approximately 650

by 600 meters. Drill holes were designed to evaluate the down-dip and strike-extent of the

favorable volcaniclastic unit host to near-surface, bulk-tonnage gold-silver mineralization (Figure 1).

Drilling followed-up significant previous results, such as

17.0 meters of 2.31 g/t gold

with 113.1

g/t silver

, including

6.0 meters of 5.30 g/t gold with 157.9 g/t silver

in drill hole FZ-25-002

(

January 22

nd

, 2026, News Release

). Results from this phase of drilling at the Finn Zone should

inform grade continuity, the down-dip and strike extents of mineralization, as well as validate

historical drill data. Results should also inform the structural model for high-grade silver

mineralization central to the target (e.g.,

6.0 meters of 5.30 g/t gold with 157.9 g/t silver

in drill

hole FZ-25-002).

Schmitt Zone:

15 drill holes for approximately 3,200 meters covered an area of

approximately 350 by 150 meters with holes designed to systematically investigate the western

strike-extent of Finn Zone-style mineralization along the favourable northwest-striking volcaniclastic

unit. Drilling also evaluated the presence of cross-cutting, vein-hosted gold-silver mineralization as

observed in several historic trenches (

May 28

th

, 2024, News Release

).

Figure 1.

Plan map highlighting the ~4.5 km Finn to Creek Corridor showing 2026 drill collar locations

as well as results from recent and historical drilling and rock and soil geochemical surveys. See

references for sources of historical data.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/6142/314351_5940c037740468f8_002full.jpg

Figure 2.

Map of the Toodoggone District showing the location of the JD Project in relation to other

development and exploration projects. Data sourced from Thesis Gold & Silver Inc., TDG Gold Corp.

and Centerra Gold Inc.'s respective corporate websites. The QP has been unable to verify the

information and that the information is not necessarily indicative to the mineralization on the property

that is the subject of the disclosure.

To view an enhanced version of this graphic, please visit:

https://images.newsfilecorp.com/files/6142/314351_5940c037740468f8_003full.jpg

National Instrument 43-101 Disclosure

This news release has been reviewed and approved by Sun Summit's Vice President Exploration, Ken

MacDonald, P. Geo., a "Qualified Person" as defined in National Instrument 43-101

Standards of

Disclosure for Mineral Projects

of the Canadian Securities Administrators. Some technical information

contained in this news release is historical in nature and has been compiled from public sources

believed to be accurate. The historical technical information has not been verified by Sun Summit and

may in some instances be unverifiable dependent on the existence of historical drill core and grab

samples.

Community Engagement

Sun Summit is engaging with First Nations on whose territory our projects are located and is discussing

their interests and identifying contract and work opportunities, as well as opportunities to support

community initiatives. The Company looks forward to continuing to work with local and regional First

Nations with ongoing exploration.

About the JD Project

The JD Project is located in the Toodoggone mining district in north-central British Columbia, a highly

prospective deposit-rich mineral trend. The JD Project covers an area of over 15,000 hectares and is in

close proximity to active exploration and development projects, such as Thesis Gold and Silver Inc.'s

Lawyers and Ranch projects, TDG Gold Corp's Baker-Shasta projects, Amarc Resource Ltd.'s AuRORA

project, Centerra's Gold Inc's Kemess East and Underground projects, as well as the past-producing

Kemess open pit copper-gold mine.

The project is 450 kilometres northwest of the city of Prince George, and 25 kilometres north of the

Sturdee airstrip. It is proximal to existing infrastructure in place to support the past-producing Kemess

mine, including roads and a hydroelectric power line.

The JD Project is in a favourable geological environment characterized by both high-grade epithermal

gold and silver mineralization, as well as porphyry-related copper and gold mineralization. Some

historical exploration, including drilling, geochemistry and geophysics, has been carried out on the

property, however the project area is largely underexplored.

About Sun Summit

Sun Summit Minerals (TSXV: SMN) (OTCQB: SMREF) is a mineral exploration company focused on the

discovery, expansion, and advancement of district-scale gold and copper assets in British Columbia.

The Company's portfolio is anchored by its flagship JD Project, alongside the Theory Project in the

prolific Toodoggone region of north-central BC, and the Buck Project in central B.C.

Further details are available at

www.sunsummitminerals.com

.

References

1

.

Hawkins, P.A. (1998), 1997 Exploration Report on the Creek Zone for Antares Mining and Exploration Corporation and AGC Americas Gold

Corporation, JD Property, Toodoggone River Area, Omineca Mining Division, Internal Report #98-065-1.

2

.

Davis, J.W., and Jamieson, M.D. (1998), Drilling and Geophysical Report on the M.H. Mineral Clain Group, Toodoggone District, Assessment

Report Indexing System, Report 25757,

https://apps.nrs.gov.bc.ca/pub/aris

.

3

.

Krause, R.G. (1995), 1994 Geological and Geochemical Report on the JD Gold Silver Property, Toodoggone River Area, Omineca Mining

Division, British Columbia, Assessment Report Indexing System, Report 23663,

https://apps.nrs.gov.bc.ca/pub/aris

.

4

.

Krause, R.G. (1996), 1995 Geological Report on the JD Gold Silver Property, Toodoggone River Area, Omineca Mining Division, British

Columbia, Assessment Report Indexing System, Report 24284,

https://apps.nrs.gov.bc.ca/pub/aris

.

5

.

McBride, S. (2013), 2012 Geological, geochemical and diamond drilling report on the JD Property, Assessment Report Indexing System,

Report 33556,

https://apps.nrs.gov.bc.ca/pub/aris

.

6

.

McBride, S. and Leslie, C. (2014), 2013 Geological, geophysical and diamond drilling report on the JD Property, Assessment Report Indexing

System, Report 34762,

https://apps.nrs.gov.bc.ca/pub/aris

.

Link to Figures

Figure 1.

https://wp-sunsummitminerals-2024.s3.ca-central-

1.amazonaws.com/media/2026/09/20260915__JD_Figure1.jpg

Figure 2

. https://wp-sunsummitminerals-2024.s3.ca-central-1.amazonaws.com/media/2026/08/SMN-

Area-Map-Aug-2026.png

On behalf of the board of directors

Niel Marotta

Chief Executive Officer & Director

[email protected]

For further information, contact:

Matthew Benedetto, Simone Capital

[email protected]

Tel. 416-817-1226

Forward-Looking Information

Statements contained in this news release that are not historical facts may be forward-looking

statements, which involve risks, uncertainties and other factors that could cause actual results to differ

materially from those expressed or implied by such forward-looking statements. In addition, the forward-

looking statements require management to make assumptions and are subject to inherent risks and

uncertainties. There is significant risk that the forward-looking statements will not prove to be accurate,

that the management's assumptions may not be correct and that actual results may differ materially from

such forward-looking statements. Accordingly, readers should not place undue reliance on the forward-

looking statements. Generally forward-looking statements can be identified by the use of terminology

such as "anticipate", "will", "expect", "may", "continue", "could", "estimate", "forecast", "plan", "potential"

and similar expressions. Forward-looking statements contained in this press release may include, but

are not limited to, the timing of and size and scope of the drill program at the JD Project; the Company's

expectation that results from the 2026 drill program will contribute to an inaugural mineral resource

estimate and the timing of any such estimate; the advancement of exploration targets at the JD Project;

the anticipated completion, interpretation and utilization of geophysical, geological, geochemical and

geochronological studies, including MobileMT and potential IP surveys; and the Company's exploration

plans, expectations and forecasts. These forward-looking statements are based on a number of

assumptions which may prove to be incorrect which, without limiting the generality of the following,

include: the Company's ability to complete the drill program as currently contemplated; risks inherent in

exploration activities; volatility and sensitivity to market prices; volatility and sensitivity to capital market

fluctuations; and fluctuations in metal prices. The forward-looking statements contained in this news

release are made as of the date hereof or the dates specifically referenced in this press release, where

applicable. Except as required by applicable securities laws and regulation, Sun Summit disclaims any

intention or obligation to update or revise any forward-looking statement, whether as a result of new

information, future events or otherwise, except as required by applicable securities laws. All forward-

looking statements contained in this press release are expressly qualified by this cautionary statement.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined

in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or

accuracy of this release.

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/314351