Dudu Tembo

Argon Asset Management (Pty) Ltd. (Argon) is a privately-held investment management firm headquartered in Newlands, South Africa. Founded in 2005, Argon provides investment management services for retail and institutional investors.

Citadel Investment Services (Pty) Ltd. is the South Africa-based investment management subsidiary of Peregrine Holdings Ltd. Headquartered in Sandton, the firm provides investment advisory services to private individual or institutional clients.

Orthogonal Investments Pty Ltd. (Orthogonal Investments) is the investment management subsidiary of Peregrine Holdings Ltd. (JH: PGR) in South Africa. Established in 2007 by Rowan Williams-Short, Douw Steenekamp, Pierre Marais and Dudu Tembo, the firm is based in Cape Town. Their name refers to the mathematical property of independence in many dimensions (the portfolio equivalent of not placing all one's eggs in one basket).