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Single Family OfficePuts its own capital into companiesLAST VERIFIED Oct 2026 · 2 SOURCES

Thamesis

London single family office operated through Thamesis Limited (incorporated 2001, Grosvenor Street), whose directors include Benjamin and James Arbib.

USEFUL FOR Co-investors

Family & background

HEADQUARTERS
London, United Kingdom
FOUNDED
2001

Investment approach

ROUTES
Companies (own capital)

Overview

Thamesis Limited is a private company registered in England, incorporated on 28 November 2001, with its registered office at 61 Grosvenor Street, London. Companies House lists Benjamin Arbib, James Arbib, Annabel Nicoll, Paul Reynolds and Melanie White as directors; Sir Martyn Arbib is a former director. The company has no official website; thamesis.com belongs to an unrelated property-management firm.

People

  • Sir Martyn Arbib
    Founder · source
  • Benjamin Arbib
    Director · source
  • James Arbib
    Director · source
  • Annabel Nicoll
    Director · source
  • Paul Reynolds
    Director · source
  • Melanie White
    Director · source
  • Cressida Myers
    CEO · source
  • Lord Massey of Hampstead
    Advisory Board Member · source

Frequently asked questions

Thamesis is a single family office based in London, the United Kingdom, founded in 2001.

Thamesis invests its own capital into companies.

Thamesis invests in Food & Agriculture, Climate & Energy, Industrial & Manufacturing, Mobility & Logistics and Fintech.

Key people at Thamesis include Sir Martyn Arbib (Founder), Benjamin Arbib (Director), James Arbib (Director) and Annabel Nicoll (Director).