Philippe Costeletos is Chairman of RIT Capital Partners plc in London. See contact routes.
Philippe Costeletos is Chairman of RIT Capital Partners plc in London, having joined the board as a non-executive director in July 2017 and becoming chairman in May 2025. Publicly available material describes his background as over 30 years of private investment and board governance experience, and as founder of Stemar Capital Partners, a private investment firm focused on building long-term investment platforms. RIT’s public disclosures do not clearly break out Costeletos’s personal investment thesis, but they identify the firm’s uncorrelated-strategies portfolio as a major allocation, alongside private investments and other long-term holdings. No reliable source in the gathered material states his typical check size or whether he usually leads or follows deals. Named companies connected to his current board and investing activity include Tambre Reproductive Medicine, Zeno Partners, AutoHellas, and Colosseum Dental Group. He has also been associated with Janus Fertility, Digital Care, Vangest Group, and Generation Home in other coverage. A distinctive public point of view is not clearly laid out in the sources, though he has stated corporate results for
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