TDG Discovers New ‘4300 Zone’ VMS Lens Below Former Hidden Creek Mine at Anyox Project VANCOUVER, British Columbia, Feb. 23, 2026 (GLOBE NEWSWIRE) -- TDG Gold Corp. (TSXV: TDG | OTCQX: TDGGF) (the “Company” or “TDG”) is pleased to announce the discovery of a new lens (4300 Zone) of volcanogenic massive sulphide (“VMS”) Cu-Zn-Au-Ag-Co1 mineralization located below the past producing Hidden Creek Mine, at its 100% owned Anyox Project located, in the Golden Horseshoe of British Columbia. The Hidden Creek Mine was discovered in 1901 and operated between 1914-1935, with reported historical productiona of 22 million tons of 1.57% Cu (byproducts were not reported). Mining was completed to a vertical depth of ~300 metres before operations ceased due to low metal prices in the Great Depression. Despite multiple studies between 1950s-1990s, mining operations never resumed at Hidden Creek and no modern exploration was undertaken until Anyox Copper Limited conducted a 22-hole shallow drilling program in 2024 (NI 43-101 Technical Report published by TDG in November 2025). Two deeper drill holes completed by TDG have outlined the newly discovered mineralization and are reported in this news release: 2024 drill hole ANY-24-003 was extended by TDG and then probed to generate the geophysical target; ANY-25-002 is the first modern drill hole targeting the geophysical “plate” that was generated. The 4300 Zone remains open for expansion in all directions. A third drill hole (ANY-25-003) has been completed and is a southerly, 80 metre step-out from ANY-25-002. Analytical results for ANY-25-003 are pending. TDG is well-funded with exploration activities continuing. Anyox has tidewater access and can be explored year-round. Hidden Creek, in combination with the defined VMS horizon that runs through the Anyox Peninsula, represents a district-scale discovery opportunity for TDG. 4300 Zone: Defining the Next Chapter at Anyox In an area never before tested by drilling or geophysical surveys, the 4300 Zone discovery drill hole ANY-25-002 intersected a broad interval of massive sulphides grading 2.1% CuEQb over 25.08 metres, (1.5% Cu, 0.7% Zn, 0.21 g/t Au, 11.9 g/t Ag, 118 ppm Co). Higher grade sub-intervals averaged 2.5% CuEQb over 14.80 metres, (1.8% Cu, 0.8% Zn, 0.25 g/t Au, 15.2 g/t Ag, 160 ppm Co), including 2.9% CuEQb over 10.80 metres (2.1% Cu, 0.8% Zn, 0.29 g/t Au, 18.0 g/t Ag, 202 ppm Co). This intersection occurs at a vertical depth of 900 metres below surface or 700 metres down-dip below the lowest level of the Hidden Creek Mine. An extension of 2024 drill hole ANY-24-003 to 1,025 metres provided the stimulus for this discovery via a highly conductive, off hole geophysical anomaly identified from a survey performed in Q4 2025. ANY-24-003 intersected 1.4% CuEQb over 5.38 metres, (1.1% Cu, 0.7% Zn, 0.03 g/t Au, 9.4 g/t Ag, 0 ppm Co), and is located 80 metres up-dip to the north from discovery hole ANY-25-002. Fletcher Morgan, CEO, commented, “The discovery of the 4300 Zone confirms the broader potential of the Anyox District beyond the historic Hidden Creek Mine. Our disciplined, methodological, capital-efficient exploration strategy has allowed us to rapidly advance this target while maintaining a strong treasury. With the zone open in all directions and multiple additional geophysical targets identified, we are well positioned to continue systematic expansion drilling in 2026.” Refining the Signal: From Conductors to Massive Sulphides In 2025, the Company performed a deep penetrating electromagnetic (“EM”) geophysical survey over its land holdings in the Anyox District that resulted in multiple new targets. Most importantly, a large, highly conductive anomaly at depth below the past-producing Hidden Creek Mine was discovered. This very broad anomaly required additional refinement to help constrain its geometry and as such, three drill holes from the 2024 drilling program were extended (1,321 metres total), for the purposes of increasing confidence with more expansive downhole EM coverage. Although new anomalies were identified proximal to the Hidden Creek Mine, the largest, most conductive plate model was an off-hole anomaly below 2024 extended drill hole ANY-24-003 which intersected 1.4% CuEQb over 5.38 metres, (1.1% Cu, 0.7% Zn, 0.03 g/t Au, 9.4 g/t Ag, 0 ppm Co). Two geophysical anomalies (plate models) were detected, measuring up to 400 by 200 metres (“m”). The occurrence of a new massive sulphide intersection in ANY-24-003, paired with new off hole conductors in an area never historically drilled necessitated further investigation. A Recognized and Predictable Geological Environment The rocks and mineralization processes of the Hidden Creek deposits are typical of Besshi VMS systems. Besshi deposits are copper-rich end members of the VMS spectrum and host subordinate concentrations of zinc, gold, silver and cobalt. Submarine volcanic rocks represent the original bedrock to the VMS mineralization, with later sedimentatio