When we started Mpartners, we began managing partners’ money only. Over the years we have had the privilege of clients joining us to have their money looked after in the same, sustainable way.

In our previous occupations we often had clients request us to: ‘Manage my money as you would manage your own’. We are now in the fortunate position to be doing just that.

Our vision? Sustainable value investing. A very common-sense approach to investing your own money. A focus on sustainability ensures that the companies are run for the long term and make a positive contribution to society. A focus on value ensures that the companies are purchased at a reasonable price therefore minimising the risk of permanent capital loss. We invite you to contact us today so that we can introduce ourselves and our company.


Since we all invest in the same portfolios, our clients can be confident that there is no conflict of interest.

Our joint goal is simple: ‘Make a reasonable return, with a strong focus on capital protection by investing in a sustainable, value-oriented manner’.

Further points which our clients find important are:

  • Liquidity – our portfolios are all highly liquid, with over 90% daily liquidity.
  • Transparency – our clients always know how we are investing and why – via quarterly reports, timely updates and 24/7 on-line access to their accounts.
  • Transparent management fee. Which is also our only source of income, so no other loyalties than to our clients.
  • Direct contact with a partner. Bored of hitting redial, or communicating with a chatbot? A partner, invested in the same way as you are is only a direct call (or visit) away.
  • We are independent. We own the shares of the company. We can decide quickly and independently since we have no allegiances with any other parties.


David Williams - Partner

“Our primary investment goal is good long term returns and avoiding permanent capital loss. In our opinion a value approach is the only proven way to achieve this.”

David Williams (1970) is responsible for the investment policy of Mpartners. After a brief career in diplomacy with the Ministry of Foreign affairs in Barbados, David joined Insinger de Beaufort asset management in 1997 and became a director in 2002. He was responsible for the investment team and the investment funds (long-only and hedged). His specialism is European equities. David holds a B.A. (Hons) from the University of Kent, an M.Sc. from the London School of Economics and an M.B.A. from Nijenrode university.

Didy van der Schilden, CAIA

“It is time to align financial goals with personal values”

Didy van der Schilden, CAIA (1979) is the compliance officer within MPartners. She began her career as a hedge fund analyst in 2003 with Insinger de Beaufort. In 2006 she became responsible for institutional sales. In 2009 she was made a director, managing the financial product advisory team of Insinger de Beaufort. Didy holds a B.Sc. from the HES in Amsterdam and is a Chartered Alternative Investment Analyst (CAIA).

Patrick van Leur: Sustainable | Mpartners

“The most important thing for me has always been that all of my savings are invested in the same portfolio as my clients – at Mpartners we eat our own cooking”

Patrick van Leur (1967) is responsible for client relations at Mpartners. After a brief period with ABN AMRO bank and IDM bank, Patrick joined Insinger de Beaufort in 1989 to set up the Sales, Trading and Research department. After 15 years in the dealing room Patrick set up the Asset Consulting unit, which serviced small and medium sized pension funds in the Dutch market.

Guy Ester: Sustainable | Mpartners

“I think that in an industry such as ours, where personal attributes such as trust are so important, a web-site is really only a limited tool – face to face meetings are essential”

Dr. Guy Ester (1971) is responsible for the investment policy of MPartners. He joined Mercer in Amsterdam in 1997 as an investment consultant. In 1999 he moved to Insinger de Beaufort, where he became a director in 2002. At Insinger de Beaufort Guy set up and managed the manager selection unit, and was also responsible for risk management of the hedge funds. Guy holds a B.Eng. (Hons) and a Ph.D. from the University of Bath.


“A key point for me is that the portfolio is uncomplicated and transparent, there are no complex products or hidden fees – just a pure investment focus”

Was employed at ABN AMRO bank for 20 years covering areas such as investment advice and relationship management.