• Gold production for Q3 Mar FY26 totalled 13,522 ounces, 49% higher than Q2 Dec FY26
• Processing performance in March improved notably under new leadership
• Mining volumes overall fell below expectations due to significantly above average rainfall

St Barbara Limited provided a preliminary update on gold production, gold sales, cash, bullion on hand, and listed investments for the March 2026 quarter ('Q3 Mar FY26'). Gold production for Q3 Mar FY26 totalled 13,522 ounces, 49% higher than Q2 Dec FY26. Gold sales for Q3 Mar FY26 totalled 11,974 ounces at an average sale price of A$6,892 per ounce. Simberi gold production for Q3 Mar FY26 improved by 49% compared to Q2 Dec FY26, with processed tonnes improving to 493kt (up 22% on Q2 Dec FY26) and a calculated average feed grade of 1.09 g/t gold (up 15% on Q2 Dec FY26). The processing performance in March improved notably under new leadership, with 192kt of ore processed at an average feed grade of 1.14 g/t gold, resulting in production of 5,973 ounces for the month. Ore mined improved to 679kt (up 24% on Q2 Dec FY26) as face positions established in H1 FY26 provided good access to ore zones. However, mining volumes overall fell below expectations, despite the progressive arrival of the Volvo A60 units, with rainfall across the quarter significantly above average. In particular, rainfall in the month of March was at the 80th percentile in terms of historical monthly rainfall records. Whilst mining operations coped reasonably well with the elevated rainfall, the mining rates were significantly hampered owing to the difficult mining conditions in the Pigibo pit. The operation is working through backfill material in the Pigibo pit, where prior year waste dump material had been stored. Mine production and processing tonnages for Q4 Jun FY26 are expected to achieve improvements from the Q3 Mar FY26 performance. Nonetheless, not all of the scheduled higher grade Pigibo pit benches will now be possible to mine by the end of Q4 Jun FY26 and will instead be recovered in July and August of 2026 due to mining face positions falling behind plans.

The Company anticipates a gold production range of 14,000 to 17,000 ounces for the New Simberi Gold Project for Q4 Jun FY26 with St Barbara's anticipated 40% attributable share of gold production therefore between 5,600 and 6,800 ounces. The All-In Sustaining Cost for Q4 Jun FY26 for the Company's attributable share of gold production is anticipated to be in the range of A$4,100 and A$4,500 per ounce, including allowance for the modest anticipated impact of diesel price escalation.