Aecus Partners
is launched
An investment boutique managing European and Global portfolios
Concentrated • Resilient • Long-term
Where equity is not just an asset class, but a core value
Fair • Transparent • Simple
bonjour@aecuspartners.com – +33 (0)1 84 80 81 82 – 128 rue du Faubourg Saint- Honoré – 75008 Paris
Team Biographies
Arnaud Cosserat
Founding Partner, Chief Executive Officer
Lead Portfolio Manager, European and Global Equity Strategies
Arnaud has over 30 years of experience in investing, specialising in European growth companies. He worked for Comgest for 27 years, from 1996 to 2023, where he was a lead portfolio manager
of European equity strategies representing over €10bn of client assets. He was Chief Executive Officer of Comgest Global Investors from 2016-2023, Chief Investment Officer from 2015-2022 and an executive member of the group’s Board of Partners. He was also Chair of the Executive, Investment, and Sustainability Committees as well as the Comgest Foundation Board.
Arnaud started his career in 1989 as an Analyst at Banque Paribas, before joining Société de Bourse Oddo and then Generali as a Portfolio Manager. He holds a Master of Science degree from the ESSEC business school (France) and is a member of the French Society of Financial Analysts (SFAF, Société Française des Analystes Financiers).
Alistair Wittet
Founding Partner, Head of Investments
Lead Portfolio Manager, European and Global Strategies
Alistair has over 18 years’ investment experience specialising in European growth companies.
He worked for Comgest from 2012-2024 where he was a lead Portfolio Manager of European strategies representing over €10bn of client assets. He was also a member of the Investment Committee and the Comgest Foundation Board. He started his career in 2006 at Standard Life Investments in Edinburgh before moving to London to join Citigroup in 2009.
A British and French national, Alistair has a degree in Geography from Durham University
and is a CFA® charterholder. He is a Professor at HEC Paris Ecole de Commerce.
Jane Russell
Founding Partner,
Head of Investor Relations and Development Strategy
Jane has worked in the industry for over 25 years in roles spanning investor relations,
business development, marketing, accounting and finance with firms including Comgest,
Antin Infrastructure Partners, Warakirri Asset Management and PricewaterhouseCoopers.
She worked with Comgest for over 10 years where she was Head of Responsible Development (ESG) and a member of the firm’s Sustainability, DE&I and Editorial Committees.
She was key to establishing the firm’s commercial activities in the US and the UK, with prior roles including Head of Global Consultant Relations, UK and US Investor Relations.
Jane is a dual Australian and French citizen. She graduated from the University
of Melbourne and is a Chartered Accountant (CA ANZ).
Helen Lowdon
Founding Partner,
Head of Operations
Helen has 15 years experience in the investment management industry across a number of operational roles. Helen worked for Comgest from 2010 to 2024 where she was Chief of Staff to the CIO, managing the Investment Solutions and Analytics team and working alongside the firm’s investment teams. She was responsible for the external research budget, was co-Chair of the firm’s Investment Committee and was an advisor to the board of Comgest Growth Plc in Ireland. Prior to this role, she worked within Comgest’s Investor Services team, responsible for client communications and reporting, performance measurement and database management.
Helen started her career in project management and communications with roles at France Telecom and Société Générale. A dual British and French citizen, she holds a degree in French from Oxford University and a Master’s degree in International Project Management from the ESCP business school in Paris.
bonjour@aecuspartners.com – +33 (0)1 84 80 81 82 – 128 rue du Faubourg Saint- Honoré – 75008 Paris
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