Robert Sierra

Ruffer LLP is the investment management subsidiary of Ruffer Management Ltd. in Great Britain. The firm was founded as Ruffer Investment Management Ltd. in 1994 by Jonathan Ruffer, Jane Tufnell, and Earl Ferrers. In 2004, they transferred their investment business to Ruffer LLP. Headquartered in London, Ruffer provides investment management services for institutions, pension funds, charities, financial planners and individual investors across the UK.

UBS AG (London Branch) is the Great Britain-based brokerage subsidiary of UBS AG, ultimately held by UBS Group AG (SWX: UBSG) in Switzerland. Headquartered in London, the firm was founded in 1998 and provides nimble, innovative and bespoke access to solutions, from market and insight tools, to trading strategies and execution for private, institutional and corporate clients worldwide, as well as private clients in Switzerland. They distribute, trade, finance and clear cash equity and equity-linked products. The firm also structures, originates and distributes new equity and equity-linked issues.