GSK stock leaps to a 25-year high on new CEO outlook — what to watch at the London open
GSK shares surged 6.9% Wednesday to a 25-year high after reporting 2025 sales of £32.7 billion and raising its 2026 outlook. The company projects 2026 revenue growth of 3%–5% and expects core profit and earnings per share to rise 7%–9%. Investors remain cautious about slower growth and looming patent expirations. London markets await Thursday’s open for further reaction.