The Children's Investment Fund Management, one of the hedge fund managers behind the resignation of Deutsche Börse's chairman and chief executive in 2005, has increased its partnership to 16 with four additions in the last six months, according to documents filed at the UK's Companies House.

Joseph Cusworth was promoted to partner this month after two years at the firm as a trader. Rishi Sunak joined the firm as a partner in September. Joseph O'Flynn, who works in finance, was made a partner in July and Timothy Keough, a trader, made partner in June, having joined last year from fund manager Alliance Bernstein.