Nelson Peltz, the founding partner of Trian Fund Management, has offered to acquire Janus Henderson for £5.3bn - Mike Blake/Reuters A Wall Street raider who forced a shake-up at Unilever has launched a $7bn (£5.3bn) bid for a historic City fund manager. On Monday, Nelson Peltz offered to acquire Janus Henderson, the London-headquartered money manager established in 1934 to manage the estate of railway financier Sir Alexander Henderson. The bid comes from Mr Peltz’s Trian group, which already owns around ...