B2Gold's Goose Mine in Nunavut achieves commercial production on October 2, 2025.

B2Gold Corp. has announced that its Goose Mine in Nunavut, Canada has achieved commercial production. The mine reached an average mill throughput of 66% of its design capacity of 4,000 tonnes per day over a 30-day period. The mill feed during this time was primarily from the Echo open pit. The supplemental mobile crusher has been integrated with the primary crushing plant, increasing crushed ore availability.

VANCOUVER, British Columbia, September 12, 2025 — B2Gold Corp. (TSX: BTO, NYSE AMERICAN: BTG, NSX: B2G) has announced that its Goose Mine in Nunavut, Canada, has achieved commercial production. The milestone was reached on October 2, 2025, after the mill operated at an average throughput of 66% of its design capacity of 4,000 tonnes per day over a 30-day period B2Gold Achieves Commercial Production at the Goose Mine^[1].

During this period, the mill feed was predominantly from the Echo open pit. The integration of a supplemental mobile crusher with the primary crushing plant significantly increased crushed ore availability. From September 19, 2025, to October 2, 2025, ore was crushed at a rate of 183 tonnes per hour, extrapolating to 4,385 tonnes per day. During this period, the mill achieved an average throughput of 3,249 tonnes per day, representing 81.2% of its design capacity B2Gold Achieves Commercial Production at the Goose Mine^[1].

B2Gold expects the Goose mill to operate near its design capacity of 4,000 tonnes per day through the fourth quarter of 2025. Open pit and underground mining rates at the Umwelt deposit have met or exceeded expectations during the 30-day commercial production period. Mill feed for the fourth quarter of 2025 is expected to average between 6.5 and 7.0 grams per tonne gold, with gold recoveries averaging higher than 90% B2Gold Achieves Commercial Production at the Goose Mine^[1].

Clive Johnson, President and CEO of B2Gold, stated, "It is with great pleasure that we announce the Goose Mine has achieved commercial production. This tremendous achievement comes just over three months after the commencement of mill operations. I would like to thank our construction and operations teams, whose tireless efforts have made this entire project possible, and acknowledge our partner, the Kitikmeot Inuit Association, for their longstanding support. The Goose Mine will be a cornerstone of B2Gold’s production base and demonstrates the strength of our construction and operating teams worldwide. We view this milestone as just the beginning for the Back River Gold District and look forward to many years of safe and successful production in Nunavut, Canada" B2Gold Achieves Commercial Production at the Goose Mine^[1].

B2Gold forecasts gold production of between 80,000 and 110,000 ounces in 2025, approximately 250,000 ounces in 2026, and approximately 330,000 ounces in 2027. The company expects average annual gold production for the initial six years of operations (2026 to 2031 inclusive) to be approximately 300,000 ounces per year, based on existing mineral reserves B2Gold Achieves Commercial Production at the Goose Mine^[1].