Goliath Reports Multiple Holes Up To 7.38 g/t AuEq Over 35.7 Meters, Including 19.51 g/t AuEq Over 8.32 Meters at the High-Grade Gold Surebet Discovery that Remains Open for Expansion, Golden Triangle, B.C.

2026-08-21

NYSE - New York Stock Exchange · Gold · Copper · Silver · Molybdenum · Canada · Drill Results

Drill hole GD-26-436 from the Surebet Zone, intersected an extensive mineralized interval near the surface that assayed 7.38 g/t AuEq over 35.7 meters, including 19.51 g/t AuEq over 8.32 meters.This entire interval is characterized by veining, alteration, and anomalous gold grades throughout its length with multiple high-grade subintervals. It also contains several occurrences of visible gold to the naked eye (VG-NE), native silver associated with galena, sphalerite, pyrrhotite and chalcopyrite in quartz-sulphide stockwork and breccia hosted in sandstones; see Figure 1.

An accompanying infographic is available at: https://www.globenewswire.com/NewsRoom/AttachmentNg/d798ea02-dcc2-45a0-a6a7-ec89f2d4ad35

_*For reported assay intervals and AuEq calculation please see QA/QC Section_

GD-26-436 confirms the continuity and consistency of Surebet mineralization, supported by numerous high-grade drill intercepts previously announced (sample below, with updated commodity prices), that all sit within a ~120 meter x ~50 meter area of the Surebet Zone; see Figure 2. GD-21-03 assayed 6.37 AuEq over 35.72 meters (see news August 30, 2021) GD-23-126 assayed 14.01 AuEq over 6.09 meters (see news August 10, 2023) GD-23-157 assayed 21.08 AuEq over 23 meters (see news August 10, 2023) GD-23-173 assayed 14.68 AuEq over 26.89 meters (see news September 14, 2023)

An accompanying infographic is available at: https://www.globenewswire.com/NewsRoom/AttachmentNg/0e10ff1a-f465-41b3-a4f6-9fc8b099a58d

Drill hole GD-26-426 intersected two neighbouring mineralized splays of the Surebet Zone. The first assayed 5.18 g/t Au over 4.50 meters, within a wider interval of 2.81 g/t Au over 9.00 meters. The second assayed 7.85 g/t Au over 3.00 meters within a wider interval of 4.22 g/t Au over 5.80 meters. Mineralization consists of breccia and stockwork with VG-NE associated with massive to stringer galena, sphalerite, and pyrrhotite; see Figure 3 (Au only; AuEq assays pending).

An accompanying infographic is available at: https://www.globenewswire.com/NewsRoom/AttachmentNg/04f339e6-9868-45d6-b315-935961e2e2b9

_*For reported assay intervals and AuEq calculation please see QA/QC Section_

Drill hole GD-26-431 intersected the sediment-hosted Eldorado Zone that returned assays of 5.83 g/t Au over 5.95 meters, including 11.42 g/t Au over 2.90 meters, within a wider interval of 3.07 g/t Au over 11.90 meters. Mineralization is present in the form of disseminated and stringer pyrrhotite and pyrite hosted in stockwork veins and veinlets associated with sericite and biotite alteration; see Figure 4 (Au only; AuEq assays pending). An accompanying infographic is available at: https://www.globenewswire.com/NewsRoom/AttachmentNg/561c73d4-5205-456b-a34a-78d1bb320c3d

_*For reported assay intervals and AuEq calculation please see QA/QC Section_

Drill hole GD-26-414 intersected the Surebet Zone that returned assays of 1.92 g/t AuEq over 16.45 meters, including 3.92 g/t AuEq over 4.00 meters and 2.01 g/t AuEq over 7.45 meters, including 3.56 g/t AuEq over 3.80 meters, including 4.84 g/t AuEq over 2.67 meters; see Figure 5(Au assays reported in August 10, 2026 news).

An accompanying infographic is available at: https://www.globenewswire.com/NewsRoom/AttachmentNg/4993c3b0-d186-43b4-b275-c259bd773542

_*For reported assay intervals and AuEq calculation please see QA/QC Section_

Visible Gold to the Naked Eye (VG-NE) has been intersected in multiple veins and shear zones from 33 out of 52 holes drilled in 2026 continuing to confirm consistency of gold mineralization within the Surebet vein system that remains open laterally and at depth; see Figures 6a, 6b and 6c.

An accompanying infographic is available at: https://www.globenewswire.com/NewsRoom/AttachmentNg/185556ac-9c03-4e7a-9505-86990df3274d

An accompanying infographic is available at: https://www.globenewswire.com/NewsRoom/AttachmentNg/1da8fa6f-5b8d-477b-b321-4ece01576c25 An accompanying infographic is available at: https://www.globenewswire.com/NewsRoom/AttachmentNg/8467d4f1-1a70-49a5-966d-278fc65cb49f

All drill holes from the 2026 drill program completed to date have intersected quartz-sulphide mineralization which typically coincide with high-grade gold mineralization. 52 out of 98 planned drill holes have been completed with a total of 31,994 meters drilled in 2026.

The fully funded 2026 drill program comprises approximately 50,000 meters of systematic drilling, including 7 drill rigs targeting expansion of the known gold mineralization laterally and at depth.

Expansion drilling will continue to focus on extending the footprint of the Bonanza, Golden Gate, and Surebet Zones.

Directional drilling consisting of multiple holes stemming from a single ‘mother’ hole is being used on selected drill pads in order to minimize drill time and costs while increasing target accuracy.Which is proving to be an effective way to drill the stacked lodes-veins, due to their close proximity can be hit several times from the ‘mother’ hole.

TORONTO, Aug. 21, 2026 (GLOBE NEWSWIRE) -- Goliath Resources Limited (TSX-V: GOT) (OTCQX: GOTRF) (FSE: B4IF) (the “Company” or “Goliath”)is pleased to report assay results for drill holes GD-26-414, GD-26-426, GD-26-431, and GD-26-436 from the Surebet Zone on its 100% owned Golddigger Property (the “Property”), Golden Triangle, British Columbia.

Mr. Roger Rosmus, Founder & CEO of Goliath states:_“Here we go again, Surebet just keeps passing the test we set out with in the 2026 drilling season. We wanted to step out aggressively to see if Surebet can keep delivering high-grade gold with large step outs. Instead of cutting anything off, the overall system just keeps getting bigger and bigger as we test it with aggressive step out holes. Of particular note, in this news release we are delighted to report some significant widths and grades from multiple holes. I have never seen a high-grade gold system that keeps delivering such remarkable high-grade gold with such a large footprint. Our team is firing on all cylinders, Surebet is passing every test and we are eager to see additional drilling results that keep showing Surebet is one of the most important high-grade gold discovery in the Golden Triangle in many years.”_

Drill hole GD-26-436 from the Surebet Zone, intersected an extensive mineralized interval near surface that assayed 7.38 g/t AuEq over 35.7 meters, including 19.51 g/t AuEq over 8.32 meters. This entire interval is characterized by veining, alteration, and anomalous gold grades throughout its length with multiple high-grade subintervals. It also has several occurrences of visible gold to the naked eye (VG-NE), native silver associated with galena, sphalerite, pyrrhotite and chalcopyrite in quartz-sulphide stockwork and breccia hosted in sandstones.

Drill hole GD-26-431 intersected the Eldorado Zone, which assayed 5.83 g/t Au over 5.95 meters, including 11.42 g/t Au over 2.90 meters, within a wider interval of 3.07 g/t Au over 11.90 meters. Mineralization occurs as disseminated and stringer pyrrhotite and pyrite in stockwork veins and veinlets hosted in sandstone and associated with sericite and biotite alteration.

Additional mineralized intercepts reported in this news release include drill hole GD-26-421 (Pad 4, Azimuth 60, Dip 72), which intersected 2.02 g/t AuEq over 3.98 meters, including 7.68 g/t AuEq over 0.98 meters, and the integration of the previously reported gold only grades with multielement assay results for drill hole GD-26-424 (Pad 1, Azimuth 115, Dip 81), which intersected 10.90 g/t AuEq over 6.00 meters, including 16.48 g/t AuEq over 3.96 meters, including 35.65 g/t AuEq over 1.82 meters.

All drill holes completed during the 2026 drill program have intersected quartz-sulphide mineralization which typically coincides with high-grade gold mineralization. 52 out of 98 planned drill holes have been completed with a total of 31,994 meters drilled thus far in 2026.

Table 1: Gold and gold equivalent assay results.

| Hole ID | | From (m) | To (m) | Interval (m) | Au (g/t) | Ag (g/t) | Cu % | Pb % | Zn % | AuEq (g/t) | | GD-26-436 | Interval | 41.30 | 81.00 | 39.70 | 2.77 | 238.25 | 0.02 | 0.28 | 0.19 | 6.70 | | Including | 41.30 | 77.00 | 35.70 | 3.02 | 264.37 | 0.02 | 0.30 | 0.21 | 7.38 | | | Subinterval | 42.38 | 45.33 | 2.95 | 10.36 | 219.24 | 0.07 | 2.69 | 1.36 | 14.70 | | | Including | 42.38 | 43.44 | 1.06 | 23.87 | 463.00 | 0.15 | 5.50 | 2.27 | 32.86 | | | Subinterval | 54.00 | 62.32 | 8.32 | 3.74 | 975.34 | 0.03 | 0.19 | 0.20 | 19.51 | | | Including | 56.19 | 59.29 | 3.10 | 6.98 | 2447.25 | 0.06 | 0.43 | 0.42 | 46.49 | | | Subinterval | 68.00 | 73.00 | 5.00 | 7.25 | 74.73 | 0.01 | 0.06 | 0.06 | 8.49 | | | Including | 69.00 | 70.00 | 1.00 | 26.06 | 178.00 | 0.01 | 0.19 | 0.15 | 28.99 | | | Subinterval | 76.00 | 77.00 | 1.00 | 7.13 | 67.72 | 0.01 | 0.20 | 0.28 | 8.32 | | | GD-26-431 | Interval | 229.00 | 240.90 | 11.90 | 3.07 | | | | | | | Including | 233.00 | 240.90 | 7.90 | 4.53 | | | | | | | | Including | 234.95 | 240.90 | 5.95 | 5.83 | | | | | | | | Including | 238.00 | 240.90 | 2.90 | 11.42 | | | | | | | | Including | 238.00 | 239.00 | 1.00 | 25.05 | | | | | | | | GD-26-426 | Interval | 272.00 | 281.00 | 9.00 | 2.81 | | | | | | | Including | 275.00 | 281.00 | 6.00 | 4.08 | | | | | | | | Including | 276.50 | 281.00 | 4.50 | 5.18 | | | | | | | | Interval | 285.20 | 291.00 | 5.80 | 4.22 | | | | | | | | Including | 286.55 | 291.00 | 4.45 | 5.34 | | | | | | | | Including | 288.00 | 291.00 | 3.00 | 7.85 | | | | | | | | GD-26-414 | Interval | 35.00 | 51.45 | 16.45 | 1.31 | 32.99 | 0.01 | 0.18 | 0.18 | 1.92 | | Including | 35.00 | 39.00 | 4.00 | 2.81 | 57.78 | 0.02 | 0.47 | 0.34 | 3.92 | | | Including | 36.00 | 37.00 | 1.00 | 9.79 | 135.00 | 0.04 | 1.03 | 0.91 | 12.40 | | | Subinterval | 44.00 | 51.45 | 7.45 | 1.33 | 37.61 | 0.01 | 0.13 | 0.20 | 2.01 | | | Including | 47.65 | 51.45 | 3.80 | 2.53 | 56.88 | 0.00 | 0.16 | 0.35 | 3.56 | | | Including | 48.78 | 51.45 | 2.67 | 3.43 | 77.54 | 0.01 | 0.23 | 0.49 | 4.84 | | | GD-26-421 | Interval | 269.02 | 273.00 | 3.98 | 1.84 | 5.50 | 0.01 | 0.12 | 0.29 | 2.02 | | Including | 269.02 | 270.00 | 0.98 | 7.00 | 18.59 | 0.02 | 0.43 | 1.14 | 7.68 | | | GD-26-424 | Interval | 532.00 | 538.00 | 6.00 | 10.32 | 23.97 | 0.04 | 0.46 | 0.31 | 10.90 | | Including | 533.04 | 537.00 | 3.96 | 15.61 | 36.15 | 0.06 | 0.69 | 0.46 | 16.48 | | | Including | 534.18 | 536.00 | 1.82 | 33.80 | 78.05 | 0.13 | 1.49 | 0.98 | 35.65 | |

*For reported assay intervals and AuEq calculation please see QA/QC Section

Table 2: Collar information for drill holes reported in this news release.

| Hole ID | CRS | Easting (m) | Northing (m) | Elevation (m) | Azimuth (deg) | Dip (deg) | Length (m) | | GD-26-436 | NAD83 / UTM zone 9N | 457718 | 6162966 | 1485 | 170 | 75 | 562 | | GD-26-426 | NAD83 / UTM zone 9N | 457190 | 6163127 | 1712 | 310 | 79 | 642 | | GD-26-431 | NAD83 / UTM zone 9N | 456710 | 6162961 | 1639 | 40 | 85 | 489 | | GD-26-414 | NAD83 / UTM zone 9N | 457718 | 6162966 | 1485 | 115 | 81 | 578 | | GD-26-421 | NAD83 / UTM zone 9N | 456710 | 6162961 | 1639 | 60 | 72 | 819 | | GD-26-424 | NAD83 / UTM zone 9N | 457718 | 6162966 | 1485 | 115 | 81 | 579 |

Surebet Discovery Highlights

100% of the drill holes completed prior to the 2026 drill season have intersected gold mineralization, clearly demonstrating remarkable grade continuity and widths, with over 1,500 drill hole pierce points; ~77% of these pierce points have 25 – 50 meter spacings. The most recent ore mineralization model (see Figure 7) incorporating all available data prior to the 2026 drill program identified five (5) stacked gold-mineralized vein systems/zones: Bonanza, Surebet, Golden Gate, Whopper, and Eldorado. Collectively these zones comprise 46 gold-rich lodes/veins and multiple subvertical Eocene-aged dyke swarms.

Table 3: Five main modelled gold rich zones and dykes, see isometric view in Figure 7 below.

An accompanying infographic is available at: https://www.globenewswire.com/NewsRoom/AttachmentNg/11be1621-60f7-4553-8839-6d003f43267a

355 out of 386 drill holes representing 92% of holes drilled between 2021 – 2025 at Surebet contain VG-NE (see Figure 8): An accompanying infographic is available at: https://www.globenewswire.com/NewsRoom/AttachmentNg/69fe4ed5-d04a-42d0-b9c7-8b8ad81b365e

High-grade gold has been identified in three distinctive rock types, including: quartz-sulphide breccias and stockwork veins hosted in the sedimentary units; precious and base metals bearing veins hosted in the volcanic units; and intermediate to felsic Eocene-aged dykes. All mineralized rock types contain substantial amounts of VG-NE (from fine-grained to coarse-grained gold) and remain open for expansion.

Metallurgical testing conducted on a composite core sample resulted in metal recoveries of 92.2% for Au, 86.5% for Ag, 94.2% for Pb and 96.9% for Zn achieved through a combination of simple gravity and flotation circuits. The gravity-only recoveries amount to 48.8% Au and 10.3% Ag with a crush size of 327 micrometer (no cyanide leaching required to recover the gold and silver). The metallurgical testing completed to date shows a benign rock composition without deleterious elements (see news release March 1, 2023).

The consistent continuity, widths and grade of ore mineralization demonstrated by >156,000 meters of drilling in multiple stacked lodes/veins confirms that the 1.8 km2 Surebet Discovery continues to demonstrate strong potential to become one of the most significant high-grade gold discoveries in British Columbia’s Golden Triangle in many years.

92% of the holes (355 out of 386) drilled prior to the 2026 drill season at Surebet contain VG-NE (see Figure 5a and 5b) and 100% of holes drilled to date at the Surebet Discovery have intersected substantial quartz-sulphide mineralization. See news releases dated: July 7, 2025, June 23, 2025, January 7, 2025, January 13, 2025, February 10, 2025, February 18, 2025, February 27, 2025, December 12, 2024, July 30, 2024, January 20, 2026, December 2, 2025, November 17, 2025, October 27, 2025, September 22, 2025, September 8, 2025, August 26, 2025, and July 28, 2025.

The best hole drilled to date from the gold-rich stacked quartz-sulphide breccias and stockwork veins hosted in the sedimentary units is GD-23-157 that assayed 21.08 g/t AuEq (18.95 g/t Au and 95.31 g/t Ag) over 23.00 meters, including 33.75 g/t AuEq (30.39 g/t Au and 150.42 g/t Ag) over 14.00 meters, including 50.27 g/t AuEq (45.27 g/t Au and 225.42 g/t Ag) over 9.00 meters (see news release dated August 15, 2023). More details on the QA/QC protocol can be found in the section titled “QA/QC Protocol” below.

The best hole drilled to date from the precious and base metals bearing veins hosted in the volcanic units is GD-24-260 from the Golden Gate Zone that assayed 34.52 g/t AuEq (34.47 Au and 3.96 Ag) over 39.00 meters, including 132.93 g/t AuEq (132.78 Au and 12.98 Ag) over 10.00 meters, and 166.04 g/t AuEq (165.84 Au and 16.07 Ag) over 8.00 meters (see news release dated January 13, 2025). More details on the QA/QC protocol can be found in the section titled “QA/QC Protocol” below.

The best hole drilled to date from the Eocene-aged dykes is GD-22-58 that assayed 12.03 g/t AuEq (11.84 g/t Au and 15.61 g/t Ag) over 10.00 meters including 19.91 g/t AuEq (19.62 g/t Au and 25.61 g/t Ag) over 6.00 meters, including 23.82 g/t AuEq (23.47 g/t Au and 30.54 g/t Ag) over 5.00 meters, plus a second separate interval down hole of 8.59 g/t AuEq (8.35 g/t Au and 20.74 g/t Ag) over 5.00 meters (see news release dated March 13, 2025). More details on the QA/QC protocol can be found in the section titled “QA/QC Protocol” below.

A study completed by the Colorado School of Mines confirms a new interpretation of the ore forming process at Surebet and suggests a common magmatic source for the high-grade gold system hosted in three distinct rock types. Until this study, researchers and explorers in the Golden Triangle had not recognized the high-grade gold discovery potential in the Eocene-aged dykes (see news release March 13, 2025), which is showing the potential that these discoveries could be a geological breakthrough in the Golden Triangle of British Columbia.

Based on positive grassroots exploration and drill results in recent years, Goliath significantly increased its land package from 66,608 hectares to 91,518 hectares (226,146 acres) and now controls 56 kilometers of the Red Line geologic trend providing for additional discovery potential.

The Golddigger Property is located adjacent to tidewater with a barge route to Prince Rupert (190 km south) and close to existing infrastructure including the town of Kitsault proximal to a permitted mine site on private property.

About Golddigger Property

The Golddigger Property is 100% owned and covers an area of 91,518 hectares in a highly prospective geological setting of the Eskay Rift, within 3 kilometers of the Red Line in the Golden Triangle of British Columbia. This area has hosted some of Canada’s greatest gold mines including Eskay Creek, Premier and Snip. Other significant and well-known deposits in the Golden Triangle include Brucejack, Copper Canyon, Galore Creek, Granduc, KSM, Red Chris, and Schaft Creek. Goliath controls 56 kilometers of the Red Line which is a geologic contact between Triassic age Stuhini rocks and Jurassic age Hazelton rocks used as key markers when exploring for gold-copper-silver mineralization.

The Surebet discovery has shown predictable continuity and good metallurgy with gold recoveries of 92.2% from gravity and flotation at a 327-micrometer crush, including 48.8% recovery of free gold from gravity alone (no cyanide required to recover the gold). The metallurgical testing completed to date shows no presence of deleterious elements (see news release dated March 1, 2023).

The Property is in a well positioned location in close proximity to the communities of Alice Arm and Kitsault where there is a permitted mill site on private property. It is situated adjacent to tide water with direct barge access to Prince Rupert (190 kilometers via the Observatory inlet/Portland inlet). The town of Kitsault is accessible by road (190 kilometers from Terrace, 300 kilometers from Prince Rupert) and has a barge landing, dock, and infrastructure capable of housing at least 300 people, including high-tension power.

Additional infrastructure in the area includes the Dolly Varden Silver Mine Road (only 7 kilometers to the East of the Surebet discovery) with direct road access to Alice Arm barge landing (18 kilometers to the south of the Surebet discovery) and high-tension power (25 kilometers to the east of Surebet discovery). The city of Terrace (population 16,000) provides access to railway, major highways, and airport with supplies (food, fuel, lumber, etc.), while the town of Prince Rupert (population 12,000) is located on the West Coast of British Columbia and houses an international container seaport also with direct access to railway and an airport.

Earlier from McEwen Inc.

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