Drilling¹ continues to confirm and expand current open pit resources³

• West Pit: 1.21 gpt² over 9.2m²; 2.46 gpt over 5.8m; 1.02 gpt over 9.2m; 3.63 gpt over 9.9m
• Central Pit: 3.05 gpt over 30.0m; 2.08 gpt over 24.0m; 1.38 gpt over 23.5m; 3.09 gpt over 14.0m, 1.85 gpt over 13.0m; 8.04 gpt over 6.5m; 1.23 gpt over 18.9m and; 2.13 gpt over 31.1m

High-grade zones intersected at Pamour West; Results confirm 4.0 km strike length of Pamour mineralized system³

• 3.14 gpt over 21.2m, 1.38 gpt over 11.8m; 11.54 gpt over 5.1m, 2.26 gpt over 5.5m, 2.22 gpt over 4.0m; 2.29 gpt over 11.0m, 27.00 gpt over 1.0m; 1.62gpt over 6.4m; 1.08gpt over 9.5m, 10.38gpt over 6.8m; 2.57gpt over 8.8m; 2.36gpt over 5.8m

Drilling at North Contact Zone confirms and expands mineralization north of Phase 2 pit³

• 4.27gpt over 12.8m; 6.84 gpt over 8.5m; 1.46 gpt over 13.2m, 0.99 gpt over 5.5m, 2.22 gpt over 5.5m, 1.34 gpt over 9.0m; 1.46 gpt over 17.0m; 1.74 gpt over 14.9m; 1.44 gpt over 11.9m

High-grade mineralization along Keora Trend intersected 200 m west of Phase2 pit³

• 17.36 gpt over 5.9m
  
  <sup>1. All assays are reported uncut.
  2. In this news release, “gpt” refers to grams per tonne, and “m” refer to metres.
  3. Intervals are reported using core lengths only as true widths are not known at this time.</sup>

Discovery Mining Ltd. (TSX: DSV) (OTCQX: DSVSF) reported results from ongoing exploration at the Company’s Pamour Mine, as part of the Company’s 255,000 – 285,000 m 2026 exploration program. The results, which include 47 holes (11,003.4 m), continued to confirm and expand mineral resources in all three phases of the current open-pit mine plan, and also returned high-grade intersections at multiple new targets located close to the existing resource.

Tony Makuch, Discovery’s President, CEO and Chairman, commented: “Today’s results clearly demonstrate that Pamour is a large-scale deposit that has the potential for significant growth supported by our plans to increase milling capacity, following the acquisition of the Kidd Metallurgical Site, and for a mine redesign to achieve higher levels of production.   Drilling results to date have been extremely successful in both confirming and expanding the existing resource and in returning high-grade intersections at multiple targets. The mineralizing system at Pamour has been identified over a 4.0 km extent at depths ranging from 300 m to 700 m, with the system remaining open. Our current exploration program includes drilling to infill and further expand the system as we work to establish Pamour’s full potential. The latest results provide further confirmation of the upside that exists and support our belief that we have an opportunity to transform Pamour into one of Canada’s largest open-pit gold mines. In addition to Pamour, we are also working to establish large-scale open-pit operations at Dome and, longer-term, at Hollinger/McIntrye, and are advancing plans to grow underground operations at Hoyle Pond and Borden.”

The 47 holes reported today targeted test areas within and surrounding the large open-pit resource at Pamour, which includes 64.8 million tonnes grading 1.30 gpt (2.70 million ounces) in the Indicated Resource category and 23.3 million tonnes grading 1.34 gpt (1.00 million ounces) in the Inferred Resource category (Figure 1).

The Pamour Mine is located approximately 20 km east of Timmins on the north side of the Destor Porcupine Fault Zone and straddles the unconformity between Tisdale Group volcanics and Timiskaming sediments. Mineralization at the mine is closely associated with quartz veining, which can occur in single veins, vein arrays, stockworks as well as pyrite both along the unconformity and in volcanics to the north.

Drilling was focused on four main areas including the Pamour pit, North Contact Zone, Pamour West and Keora Trend. The Keora Trend, which included one of the newly drilled holes is located approximately 200 meters west of the phase 2 pit. The drilling represents a continuation of a program which commenced in the second quarter of 2025 to convert and extend resources in preparation for a new resource update later in 2026.

Significant results from the central portion of the pit include: 3.05 gpt over 30.0m, in hole PAM26-158LR; 2.08 gpt over 24.0m, in hole PAM25-0142; 1.38 gpt over 23.5m, in hole PAM25-0147; 3.09 gpt over 14.0m, in hole PAM25-0144; 1.85 gpt over 13.0m, in hole PAM25-0143; 8.04 gpt over 6.5m, in hole PAM25-0141; 1.23 gpt over 18.9m, in hole PAM25-0140 and; 2.13 gpt over 31.1m, in hole PAM25-0134 (Table 1).

Significant results from the west portion of the pit include: 1.21 gpt over 9.2m, 2.46 gpt over 5.8m and 1.02 gpt over 9.2m, in hole PAM25-0129; and 3.63 gpt over 9.9m, in hole PAM25-0135.

Drilling at Pamour West included 7 holes (1,848.5m) to confirm and expand mineralization surrounding the historic Broulan open pit and underground mine located approximately 4 km west of the eastern extent of the current Pamour resource. Significant results include 3.14 gpt over 21.2m and 1.38 gpt over 11.8m, in hole PAM26-0205; 11.54 gpt over 5.1m, 2.26 gpt over 5.5m, 2.22 gpt over 4.0m, in hole PAM26-0211; 1.62gpt over 6.4m, 1.08gpt over 9.5m, 10.38gpt over 6.8m, 2.57gpt over 8.80m, 2.36gpt over 5.80m, 7.39 gpt over 1.8m and 6.63 gpt over 1.9m, in hole PAM26-0176; and 2.29 gpt over 11.0m and 27.00 gpt over 1.0m, in hole PAM26-0192.

Drilling at the North Contact Zone included 14 holes (4,117 m) which targeted a major east – west trending volcanic sedimentary contact located directly north of the phase 2 pit and into an untested gap in drilling between historic holes located 600 m to the east and 800 m to the west. Significant results from the new drilling include: 4.27gpt over 12.8m, in hole PAM26-0212; 6.84 gpt over 8.5m, in hole PAM26-0240; 1.46 gpt over 13.2m, 0.99 gpt over 5.5m, in hole PAM26-0244,1.34 gpt over 9.0m, in hole PAM26-0249; 1.46 gpt over 17.0m, in hole PAM26-0195; 1.74 gpt over 14.9m, in hole PAM26-0194; and 1.44 gpt over 11.9m, in hole PAM026-0225.

Drilling along the Keora Trend included one hole (555 meters) labelled PAM26-0278 which crossed the target area approximately 200 meters west of the current resource pit. Results of the drilling were extremely positive and included 17.36 gpt over 5.9m from hole at a vertical depth of approximately 350 m from surface.

The drill program remains ongoing, with one drill focused on the Pamour open pit area, a second drill testing the Pamour West target, and a third drill operating at the North Contact Zone.

Figure 1. Pamour Drill Results

 Link to 3D visuals: https://vrify.com/decks/23398?auth=22ccdfac-6fc8-46f8-bd80-2cca70d1dd9f

1.    ^{All assays are reported uncut.
   2.    Intervals are reported using core lengths only as true widths are not known at this time.
   3.    Holes PAM26-0148, -0197, -0201, -0200, -0202, -0208, -0187, -0185, -0237, and -0237a are not included in the table above as they have low grade values.}

QUALIFIED PERSONS

Discovery’s exploration programs at the Porcupine Operations are conducted under the supervision of Eric Kallio, P.Geo., Senior Vice President, Exploration, Kara Byrnes, P.Geo, Vice President, Exploration and Geology – Porcupine and Craig Yuill, P.Geo., Exploration Manager. Mr. Kallio, Ms. Byrnes and Mr. Yuill are “qualified persons” for the purpose of National Instrument 43-101, Standards of Disclosure for Mineral Projects, of the Canadian Securities Administrators, and have reviewed and approved the scientific and technical information in this news release.

Readers are referred to the mineral resource estimate as set out in the Company’s current technical report entitled “Porcupine Complex, Ontario, Canada NI 43-101 Report on Preliminary Assessment” with an effective date of January 13, 2025 (the “Technical Report”), which is available under the Company’s issuer profile on SEDAR+ at www.sedarplus.ca. Statements concerning mineral resource estimates may also be deemed to constitute forward looking information to the extent that they involve estimates of the mineralization that will be encountered if the property is developed. The Technical Report includes the results of a preliminary economic assessment which is preliminary in nature. It includes inferred mineral resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves and there is no certainty that the preliminary economic assessment will be realized.

QA/QC CONTROLS

The Company follows a quality assurance and control program to ensure that sampling and analysis of all exploration work is conducted in accordance with best practices.

At Pamour, core is logged and sampled in a secure facility at the Dome mine site and under supervision of Qualified Geologists. The NQ sized core is predominantly whole core sampled with select holes being sawn in half for future verification. CRM standards, coarse blank material and duplicates are inserted every 20 samples. Samples are picked up by Activation Laboratories and tracked via a chain of custody from site to the lab for preparation and assaying.

Discovery utilizes the accredited external lab Activation Laboratories to manage its core analysis. ActLabs is certified by the Standards Council of Canada which conforms with ASB-RG Mineral Analysis Laboratory for the Accreditation of Mineral Analysis Testing Laboratories and CAN-P-4E ISO/IEC 17025: General Requirements for the Competence of Testing and Calibration Laboratories.

Sample preparation includes crushing drill core up to 80% passing 2 mm, riffle splitting 500 grams and pulverizing to 95% passing 105 µm followed by both scheduled and specifically requested silica sand cleaning. Gold Analysis involves Fire Assay – Atomic Absorption technique from a 50-gram pulp sample with grade ranges between 5 to 10,000 ppb. Samples greater than 10,000 ppb are analyzed with a gravimetric finish. Selected high grade samples are also analyzed using the screen metallics procedure.

ABOUT DISCOVERY

Discovery Mining Ltd. is a growing precious metals company that is creating value for stakeholders through exposure to gold, silver and other critical minerals. Discovery is advancing plans to more than double annual gold production through investment in the Company’s Porcupine assets, which include multiple operations, attractive growth projects and significant exploration upside in one of the world’s most renowned gold camps in and near Timmins, Ontario. The acquisition of the Kidd Operations in June 2026 further increased Discovery’s land position within the camp, provided valuable infrastructure that will support the Company’s growing gold business, and added critical minerals to the Company’s current production profile. Discovery’s silver exposure comes mainly from the 100%-owned Cordero project, one of the world’s largest undeveloped silver deposits, which is located close to infrastructure in a prolific mining belt in Chihuahua State, Mexico.