Alamos Gold extends mineralization across Island Gold district targets

All amounts are in United States dollars, unless otherwise stated TORONTO, June 22, 2026 (GLOBE NEWSWIRE) -- Alamos Gold Inc. ( TSX:AGI; NYSE:AGI ) (“Alamos” or the “Company”) today reported new results from underground and surface exploration drilling at the Island Gold Mine. Exploration drilling has defined high-grade mineralization across multiple areas which are being targeted as sources of additional higher-grade mill feed within the expanded Magino mill. This includes defining a new zone of high-grade mineralization 250 metres (“m”) west of underground Mineral Reserves and Mineral Resources (Island Gold West Extension), and continuing to extend mineralization within the Island West up-plunge area.

Given its proximity to surface, Island West up-plunge can be mined utilizing the ramp, providing further upside potential in terms of combined underground mining rates. Additionally, the regional exploration program continues to intersect high-grade gold mineralization at the past-producing Cline-Pick, and Edwards mines, located seven kilometres (“km”) from the Magino Mill (see Figure 1). "As outlined in the Expansion Study, the Island Gold District is expected to become one of the largest and lowest cost gold operations in Canada.

Given our ongoing exploration success within the main Island Gold structure, and across multiple near mine targets, we expect there is further production growth to come. With multiple higher grade targets being defined within proximity to the Magino mill, and an expansion underway that will provide more than enough mill capacity, we see excellent potential to drive production higher by further increasing the proportion of higher-grade ore that will be processed within the expanded circuit,” said Jo