Vesuvius PLC (LSE:VSVS) shares declined 9.4% to 409.6 pence on Monday, 27 July 2026, after the British steel and foundry specialist announced a lower profit outlook for the first half of 2026. The company now expects a trading profit of approximately £74 million (US$98.75 million) for the January‑June 2026 period, compared with £77 million reported in the same half‑year of 2025. Vesuvius attributed the weaker outlook to continued operational problems in its Steel division and to difficult trading conditions faced by its Advanced Refractories unit, especially in Europe. No further guidance on mitigation measures or timelines was provided.