Take context from the input text and decide on the accurate relationship between 'Weir Group' and 'London Stock Exchange' from the options provided.
Options: publisher, operator, brand, stock exchange

204.60p +0.44% London Stock Exchange Group (LSE) 2,617.00p +0.42% Sage Group (LSE: SGE.L - news ) (SGE) 524.50p +0.38% FTSE 100 - Fallers Glencore (GLEN) 161.70p -8.18% Weir Group (WEIR) 1,371.00p -3.79% Rolls-Royce Holdings (RR.)
stock exchange