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DEF.V ·

Defiance Silver San Acacio Drilling Returns High Grade Silver; Additional Holes Pending from Lucita Drilling

Drill Results

Defiance Silver San Acacio Drilling Returns

High Grade Silver; Additional Holes Pending

from Lucita Drilling

Vancouver, British Columbia--(Newsfile Corp. - September 9, 2026) - Defiance Silver Corp. (TSXV:

DEF) (FSE: D4E) (WKN: A1JQW5) ("

Defiance

" or the "Company") is pleased to provide the results on

the drilling campaign on the San Acacio resource drilling program on the Zacatecas project. The

campaign was designed to confirm the extension of the known mineralized structures both laterally and

vertically as well as to validate the current geological model that will be used for the upcoming Mineral

Resource Estimate. This release contains results from holes: DDSA-26-89 through DDSA-26-92.

The drilling campaign has successfully completed 6,132m distributed in 21 holes in the resource area.

The samples from holes DDSA-26-89 to DDSA-26-92 are reported in this release. The company is

looking forward to integrating the assay results from the San Acacio drilling into the Mineral Resource

Estimate, which is currently underway. The remaining 4,064 meters were used to test highly prospective

targets in the Lucita South area, including a significant test of the high-grade multi-kilometre long

Palenque vein system. The Lucita project forms part of the 4,217 Ha, Zacatecas Project. Defiance has

released previous grassroots discovery results in NR dated

August 9, 2022

, DDLU-22-10 intersected

several different styles of mineralization, including grades up to 737 g/t Ag (from 398.00m to 398.53m),

and in NR dated

April 13, 2022

, drillhole DDSA-21-50 returned a downhole interval of 1.15m of 1,603.90

g/t Ag (from 116.25m to 117.4m), within a downhole interval of 3.33m grading 709.04 g/t Ag (from

115.82m to 119.15m). These previously reported drill holes were the first drill holes ever recorded on the

Lucita South asset in the world-class Zacatecas district.

Highlights of Results

DDSA-26-89 returned

2.75m

of 118.94 g/t Ag

(from 42.25m to 45.00m) hosted within a larger

interval of Veta Grande vein system.

DDSA-26-90 intersected

0.34m of 735.00 g/t Ag

(from 353.58m to 353.92m) within a larger

interval of

1.79 m

(from 353.58m to 355.37m)

grading 148.97 g/t Ag

and 0.12 g/t Au.

DDSA-26-91A assayed

0.31m of 990.00 g/t Ag and 0.28 g/t Au

(from 307.29m to 307.60m)

hosted in a larger interval of 1.40m of 221.00 g/t Ag (from 306.20m to 307.60m) and

1.49m of

41.74 g/t Ag and 1.38 g/t Au

(from 368.90m to 370.39m) hosted in a larger interval of

24.00 m of

9.43 g/t Ag, 0.27 g/t Au, 0.26% Pb,

and

1.03% Zn

(from 347.94m to 371.94m).

DDSA-26-92 returned

1.29m of

80.43 g/t Ag, 0.34 g/t Au and 0.18% Pb, and 0.34% Zn

(from

291.04m to 292.33m).

Overview Map of Drill Locations

Figure 1. Overview Map of Drill Locations.

Plan map of the San Acacio project area. Drill holes

reported in this release are shown with yellow collars and traces, with selected highlights in boxes.

Coordinates are in UTM WGS84 Zone 13N.

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

https://images.newsfilecorp.com/files/2950/313398_441b30771481ca1b_001full.jpg

Simplified Cross Section, Looking NW, with New Results from Hole DDSA-26-91, 91A and

DDSA-26-92

Figure 2. DDSA-26-91, 91A and DDSA-26-92 Simplified Cross Section.

Looking NW

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

https://images.newsfilecorp.com/files/2950/313398_defiancefig2.jpg

Table of Results

Hole ID

From (m)

(To (m)

Length (m)

Ag ppm

Au ppm

Cu%

Pb%

Zn%

DDSA-26-89

42.25

45.00

2.75

118.94

0.02

0.03

0.02

0.03

and

61.11

62.12

1.01

147.15

0.01

0.01

0.05

0.17

DDSA-26-90

353.58

355.37

1.79

148.97

0.12

0.01

0.10

0.45

Including

353.58

353.92

0.34

735.00

0.37

0.01

0.33

1.97

DDSA-26-90

386.29

387.10

0.81

79.77

0.39

0.21

2.72

1.49

DDSA-26-91A

225.34

226.33

0.99

103.00

0.14

0.01

0.03

0.13

DDSA-26-91A

306.20

307.60

1.40

221.00

0.08

0.01

0.05

0.15

Including

307.29

307.60

0.31

990.00

0.28

0.01

0.23

0.62

DDSA-26-91A

347.94

371.94

24.00

9.43

0.27

0.02

0.26

1.03

Including

353.15

355.66

2.51

11.45

0.46

0.03

0.32

1.29

355.66

356.70

1.04

no vein

material

recovered*

Including

360.05

361.59

1.54

11.68

0.68

0.02

0.24

1.80

Including

368.31

371.94

3.63

38.97

0.68

0.04

1.07

4.30

Including

368.90

370.39

1.49

41.74

1.38

0.07

2.36

9.91

DDSA-26-92

291.04

292.33

1.29

80.43

0.34

0.02

0.18

0.34

and

405.77

407.08

1.31

17.70

0.17

0.02

0.05

0.45

and

436.55

439.25

2.70

16.80

0.13

0.05

0.49

1.21

Table 1. Table of Results.

True thickness is assumed to be 50% - 80% of downhole width. *Intercepts

of no vein material recovered were treated as zero for intervals calculation.

Discussion of Results

DDSA-26-89

Drilling was carried out in the central block, near its boundary and between drill holes

SAD95-12 and SAD95-34, about 40 m below the surface. The purpose was to determine continuity in

the gap between the historical Almaden and Esperanza open pit mines. Drilling was also designed to

test east-west features identified in surface mapping and confirm the results from the 1995 drilling. It also

aimed to improve understanding of how the geological features are arranged. The Veta Grande was

expected at about 40 m and was found near the surface well preserved but strongly oxidized. Narrow

zones with high mineral concentrations were also found in the hanging wall of the Veta Grande vein

system.

DDSA-26-90

Drilling was carried out in the central block, near its boundary and above the San Genaro

fault system. The Veta Grande was found across a wide interval, with high zinc values but less silver than

expected. Several narrow zones with high silver concentrations were also encountered in the hanging

wall of the vein system.

DDSA-26-91

Drilling was carried out in the northwestern block, near the concession boundary. The

design of this hole was planned to follow up on the small veins and veinlet array zones with high mineral

concentrations, as encountered in drill hole DDSA-23-64, as reported in the NR dated

June 7, 2023

,

which encountered two significant zones of appreciable silver grade: 4.80m of 349.37g/t Ag (from

236.72m to 241.52m) including 1.32m of 1,264.42 g/t Ag (from 239.07m to 240.39m) and 3.21m of

200.05 g/t Ag (from 256.22m to 259.43m). Drilling was stopped because the hole deviated significantly

from the planned target pierce point.

DDSA-26-91A and DDSA-26-92

These holes were drilled in the northwestern block, near the

concession boundary. Their purpose was to continue investigating the small veins and zones with high

mineral concentrations as encountered in drill hole DDSA-23-64. The final drill hole of this campaign at

San Acacio was DDSA-26-92. Drilling was successful in identifying a wide zone containing gold and

base metals. This zone includes small veins in the hanging wall of the Veta Grande as well as the Veta

Grande itself.

Collar Information for Reported Drill Holes

Hole Number

Tricone_m

DDH_m

Total Depth_m

Azimuth

Dip

Easting

Northing

Elevation_m

DDSA-26-89

0

94

94

40

-60

751661

2526411

2568

DDSA-26-90

0

491

491

25

-54

751804

2525899

2639

DDSA-26-91

0

185

185

3

-40

751223

2526349

2621

DDSA-26-91A

168

234

402

6

-40

751223

2526348

2621

DDSA-26-92

0

471

471

10

-66

751224

2526346

2621

Table 2. Drill collar details.

All coordinates in WGS84 UTM Zone 13N

Discussion of QA/QC and Analytical Procedure

Samples were selected based on the lithology, alteration, and mineralization characteristics; sample

size ranges from 0.25 - 2m in width.

All altered and mineralized intervals were sent for assay. One blank,

one standard, and one duplicate were included within every 20 samples. Standard materials are

certified reference materials [CRMs] from OREAS and CDN that contain a range of Ag, Au, Cu, Pb, and

Zn values. Blanks, standards, and duplicates did not detect any issues with the analytical results.

Samples were analyzed by ALS Chemex Laboratories, an independent analytical facility. Sample

preparation was performed at the Zacatecas, Mexico, prep facility, and analyses were performed at the

Vancouver, Canada, analytical facility. All elements except Au and Hg were analyzed by a multi-element

geochemistry method utilizing a four-acid digestion followed by ICP-MS detection [ME-MS61m]; mercury

was analyzed after a separate aqua regia digest by ICP-MS. Overlimit assays for Ag, Pb, and Zn were

conducted using the OG62 method (multi-acid digest with ICP-AES/AAS finish). Gold was measured by

fire-assay with an ICP-AES finish [50g sample, Au-ICP22].

About Defiance Silver Corp.

Defiance Silver Corp. (TSXV: DEF) (OTCQX: DNCVF) (FSE: D4E) is an exploration company

advancing the district-scale Zacatecas project, located in the historic Zacatecas Silver District, the 100%

owned Tepal Gold/Copper Project in Michoacán state, Mexico and the newly acquired Green Earth

Metals property portfolio in Sonora State. Defiance is managed by a team of proven mine developers

with a track record of exploring, advancing, and developing several operating mines and advanced

resource projects. Defiance Silver's corporate mandate is to advance its projects through capital-

efficient exploration focused on resource growth and new mineral discoveries.

On behalf of Defiance Silver Corp.

"Chris Wright"

Chairman of the Board

​For more information, please contact:

Investor Relations at +1 (604) 343-4677 or email at

[email protected]

www.defiancesilver.com

Suite 2900-550 Burrard Street

Vancouver, BC V6C 0A3, Canada

Tel: +1 (604) 343-4677

Email:

[email protected]

Qualified Person Statement

Mr. George Cavey, P. Geo, is a Qualified Person within the meaning of National Instrument 43-101

and has approved the technical information concerning the Company's material mineral properties

contained in this press release.

Disclaimer

Neither 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.

Caution Regarding Forward-Looking Information

Information contained in this news release which are not statements of historical facts may be

"forward-looking information" for the purposes of Canadian securities laws. Such forward-looking

information involves risks, uncertainties and other factors that could cause actual results,

performance, prospects, and opportunities to differ materially from those expressed or implied by

such forward looking information. The words "believe", "expect", "anticipate", "contemplate", "plan",

"intends", "continue", "budget", "estimate", "may", "will", "schedule", "understand" and similar

expressions identify forward-looking information. These forward-looking statements relate to, among

other things, the prospects of the Zacatecas Project and the Company's ability to deliver a MRE

thereon in 2026; and the significance of historic exploration activities and results on the Company's

projects.

Forward-looking information is necessarily based upon a number of estimates and assumptions that,

while considered reasonable by Defiance, are inherently subject to significant technical, political,

business, economic and competitive uncertainties, and contingencies. Known and unknown factors

could cause actual results to differ materially from those projected in the forward-looking information.

Factors and assumptions that could cause actual results or events to differ materially from current

expectations include, among other things and without limitation: the results of exploration activities,

the Company's financial position and general economic conditions, the ability of exploration activities

to accurately predict mineralization; the accuracy of geological modelling; the ability of the Company

to complete further exploration activities; the legitimacy of title and property interests in the Zacatecas

and Tepal Projects; the accuracy of key assumptions, parameters or methods used to estimate the

Tepal MRE; the ability of the Company to obtain required approvals; the evolution of the global

economic climate; metal prices; environmental expectations; community and non-governmental

actions; the Company's ability to secure required funding; and other risks detailed from time to time in

the filings made by the Company's public disclosure record on file with the relevant securities

regulatory authorities. For additional risk factors, please see the Company's most recently filed

Management Discussions & Analysis for its quarter ended March 31, 2026, available on SEDAR at

www.sedarplus.ca

.

There can be no assurances that forward-looking information and statements will prove to be accurate,

as many factors and future events, both known and unknown could cause actual results, performance,

or achievements to vary or differ materially from the results, performance or achievements that are or

may be expressed or implied by such forward-looking statements contained herein or incorporated by

reference. Accordingly, all such factors should be considered carefully when making decisions with

respect to Defiance, and prospective investors should not place undue reliance on forward looking

information. Forward-looking information in this news release is made as at the date hereof. The

Company assumes no obligation to update or revise forward-looking information to reflect changes in

assumptions, changes in circumstances or any other events affecting such forward-looking

information, except as required by applicable law.

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

https://www.newsfilecorp.com/release/313398