in private wealth

for international families 

and individuals.

Highly personalised investment portfolios for international clients to maximise your wealth and protect future generations


Asset allocation analysis for professional investors and financial planners.


Investments for the future.




ISGAM’s key services are portfolio management and investment research. Our financial planners also provide professional financial planning services and


We believe that the most important aspects of an investment strategy are diversification and asset allocation.


Established in Switzerland in 2001, our goal is to be a lifelong guide to our clients and their families





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Client Testimonial

Philip Portal

Managing Director

Philip Portal, Managing Director of ISGAM, has been advising an international clientele of individuals and families in relation to their private assets since 1984 when he was a founding partner of a UK investment brokerage.

Philip has been with ISGAM since its inception in 2001 and he brings with him over 30 years of experience in this industry. His prior experience was in business management.

Philip was educated at Radley College in the UK, graduated with Politics (Honours) from Durham University. He was awarded his financial planning qualifications by the CII in the UK where he is a member of the UK Personal Finance Society. He is British and speaks Portuguese, French and Spanish.

Marianne Rameau

Head of Research and Portfolio Management

Marianne Rameau, has been a portfolio manager and investment analyst for over 30 years. Her founding qualifications are from the UK, obtaining the status of Associate of the Society of Investment Professionals (ASIP), now the CFA UK. She is also a member of the CFA Society of the UK and of the US CFA Institute. She has a B.A. degree in Psychology from Leiden University, Holland.

Marianne is a regular lecturer on the practicalities of investment management to business people internationally.

Andrew Little Martin

Relationship and Business Development Manager

After graduating from Oxford Brookes University, Andrew worked for several years in the UK before settling in Switzerland. In January 2009 he joined an independent financial advisor in Geneva, advising executive expatriates on their investment and estate planning needs.

In 2010, after the arrival of his first daughter, he joined Coutts and Co Ltd. a private bank in Geneva and over the following years has built up an extensive knowledge and experience working with private clients, companies and trust structures. Although South Africa is his primary market, due to political and financial uncertainties in the country, several of his clients now reside in the Channel Islands, the Middle East, the US and the UK.

He is an Associate with the Chartered Institute for Securities and Investment (CISI), based in the UK and has completed several UK and international Wealth Management, Financial Planning and Compliance exams. He has also completed all necessary South African regulatory exams and additional financial planning qualifications with Moonstone Business School and Milpark Business School respectively.

Frank Van Lerven

Relationship Manager

who is a relationship and marketing manager of ISGAM, has spent over 30 years building his knowledge and expertise in US and international financial planning. He joined ISGAM at its inception. His clientele are primarily executives before or during retirement with a particular focus on cross border issues.

He is a psychology graduate of the University of Groningen, holds the UK Financial Planning Certificate and has received CFP® (certified financial planner) certification in the U.S.A. He is an active member of the FPA (Financial Planning Association).

Beatriz Rosenberger

Digital Marketing Manager

Alexander K. Iten


Alexander K. Iten, chairman of ISGAM since April 2021, holds a master’s degree in business administration with a specialisation in Banking, as well as a Master’s in Law from the University of St. Gallen and is admitted to the bar in Switzerland. He has his own law practice in Zurich and advises companies in the financial industry on legal and regulatory issues.

He has more than fifteen years of experience in the financial sector both as an economist and as a lawyer.

Stephanie Speake​

Finance Manager




Francesca Critchley