Jean-François Théodore, the former chief executive of Euronext who died on Monday, was remembered this week as a "charming" man with a "mischievous" streak who was "the architect of the first pan-European exchange" and "one of France's great entrepreneurs".

Senior figures from across the exchanges and clearing industry past and present - including those he worked with and others he found himself competing against - responded to news of the 68 year-old's death on Monday with expressions of sadness and shock at the loss of a man widely hailed as a hard-working visionary who helped shape the make-up of modern day exchanges.