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Diane Seymour-Williams

Founding Partner

Acorn Capital Advisers

London, UK

Diane Seymour-Williams
John Sergides
MUFG Investor Services
Huw Shakeshaft
TransAtlantica Partners Limited

Diane Seymour-Williams’ Biography

Diane is a founding partner of Acorn Capital Advisers, an independent adviser to family offices and families. Her executive career in investment management included roles as CIO, CEO and portfolio manager with considerable international experience, particularly in Asia and across global boutique and start-up businesses.

As an experienced Non Executive Director she has held roles across the wealth and investment management, private equity, investment services and VCT sectors. Diane is currently a Non-Executive Director of Mercia Asset Management Plc, Standard Life Private Equity Trust Plc, PraxisIFM Group Limited and SEI Investments (Europe) Limited.

Drawing on her successful career as a portfolio manager, Diane is now a highly regarded investment adviser to long-term endowments, institutions and family offices. She has a deep understanding of client expectations, needs and asset allocation as well as risk trade-offs. Diane has specialist expertise in perpetual capital vehicles, including venture and growth equities. She is experienced as a Chair including of ESG, Risk and Remuneration committees.

Her pro bono work includes serving as a member of Investment Committees of Newnham College, Cambridge and the Canal & River Trust.

Diane graduated from Cambridge University and holds a Master of Arts in Economics.

Diane Seymour-Williams’ Background

Acorn Capital Advisers
Founding Partner
Mar 2018 - Present
London, UK
Diane is a Founding Partner at Acorn Capital Advisers, an independent wealth management adviser to family offices and UHNWI.
LGM Investments
Director & Global Head of Relationship Management
Apr 2007 - Feb 2016
London, UK
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Current Board Positions

Mercia Asset Management logo Mercia Asset Management logo
Mercia Asset Management
Non-Executive Director
Nov 2020 - Present
Mercia Asset Management is a specialist asset manager with a focus on regional businesses seeking venture, private equity or debt finance to scale their businesses. Mercia is exclusively a UK domestic investor.
Standard Life Private Equity Trust plc (SLPET)
Non Executive Director
Jun 2017 - Present
London, UK
The Standard Life Private Equity Trust aims to achieve long-term returns through holding a diversified portfolio of private equity funds and direct investments, focusing on mid-market buy-outs.
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Previous Board Positions

Brooks Macdonald Group plc logo Brooks Macdonald Group plc logo
Brooks Macdonald Group plc
Non Executive Director
Aug 2011 - Oct 2020
London, UK
Diane was a Non Executive Director of Brooks Macdonald Group plc, an AIM-listed wealth manager.
Brooks Macdonald Group plc logo Brooks Macdonald Group plc logo
Brooks Macdonald Group plc
Chairman, Remuneration Committee
Sep 2012 - Jul 2019
London, UK
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Philanthropy

The Canal & River Trust
Investment Committee Member (Pro Bono)
Oct 2020 - Present
Milton Keynes, UK
The Canal & River Trust looks after over 2,000 miles of waterways in the UK. The Trust works with volunteers and communities across England and Wales to transform canals and rivers into spaces where people want to spend time and feel better.
Newnham College, Cambridge University
Investment Committee Member (Pro bono)
2004 - Present
Cambridge, UK
Newnham College forms part of the University of Cambridge and was established in 1871 as one of the first women’s colleges. It is now the only undergraduate college with an all-female Fellowship.
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Diane Seymour-Williams’ Education

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