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Single Family OfficePuts its own capital into companiesLAST VERIFIED Oct 2026 · 5 SOURCES

Fifth-generation single family office in Hampstead, London, investing across public and private equity, hedge funds and property; also runs a philanthropy programme.

USEFUL FOR Business owners seeking a long-term partner · Co-investors

Family & background

FAMILY
Leon
HEADQUARTERS
London, United Kingdom
FOUNDED
1929

Investment approach

GEOGRAPHY
Global
ROUTES
Companies (own capital)
STRATEGIES
Public equitiesPrivate equityHedge fundsReal estate
INBOUND
No unsolicited proposals

Overview

J. Leon Group describes itself as a fifth-generation single family office based in Hampstead, London, operating through J. Leon & Company Limited, incorporated in 1929. It invests across public and private equity, hedge funds and property with global exposure. Its Philanthropy Council makes grants to UK charities in four areas, including disadvantaged young people and human rights. It states it does not consider unsolicited investment approaches.

People

  • Tania Liliana Slowe
    Director (since 1997) · source
  • Patrick William Walker
    Director (since 1999) · source
  • Vincent Robert Smith
    Director · source
  • Alexander Percy Church
    Director · source
  • Jonathan Leon Slowe
    Director · source
  • Joanne Shenton
    Director · source
  • Angus David Walker
    Director (since 2024) · source

Frequently asked questions

J. Leon Group is a single family office based in London, the United Kingdom, founded in 1929.

J. Leon Group invests on behalf of the Leon family.

J. Leon Group invests its own capital into companies. Its stated asset mix includes public equities, private equity, hedge funds and real estate.

J. Leon Group invests in Real Estate & PropTech, HealthTech, Deep Tech, Fintech, Climate & Energy, Food & Agriculture and Mobility & Logistics.

Key people at J. Leon Group include Tania Liliana Slowe (Director (since 1997)), Patrick William Walker (Director (since 1999)), Vincent Robert Smith (Director) and Alexander Percy Church (Director).

J. Leon Group states that it does not accept unsolicited proposals.