GSK plc Stock in December 2025: Buybacks, New CEO and Strong Q3 Results Drive a 40% Rally
GSK shares traded near multi-year highs on 4 December, closing at 1,826–1,837p in London and $48.57 in New York, up over 40% year-to-date. The company repurchased more than 11.5 million shares since late September as part of a £2 billion buyback. New executive share options were granted on 5 December. Market cap stands at about £73 billion in London and just under $100 billion in New York.