French wealth management firm Groupe Allen enters UK market with Altyx acquisition

Unsplash - 29/05/2026

Groupe Allen, an independent wealth management advisory firm led by Sandrine Genet, announces the acquisition of Altyx Financial Planning, a London-based wealth advisory firm specialising in supporting French nationals residing in the United Kingdom on complex cross-border wealth management.

Groupe Allen is a leading independent player in the private wealth and family office sector in France, advising approximately 2,700 families and entrepreneurs with โ‚ฌ2 billion of assets under management from its offices in Paris, Lyon, Toulouse, Montรฉlimar, Brussels and Luxembourg. 

This transaction marks a strategic milestone in the French Groupโ€™s European expansion plans while also representing the first time an independent French wealth management firm has established a presence in the UK via acquisition. 

Founded in 2010 and led by Bรฉrangรจre Salembien, Altyx Financial Planning has been supporting clients who face complex wealth and tax issues related to international mobility, specifically between France and the United Kingdom. This rare cross-border expertise continues to be overlooked by French independent wealth management firms. 

This acquisition is part of Groupe Allenโ€™s long-standing strategic ambition: to become the French benchmark in wealth advisory services for internationally minded families and entrepreneurs. Following an initial phase of growth in the Benelux region, the London office represents an exciting new chapter in Groupe Allenโ€™s European trajectory with further acquisitions planned over the next 12 months. 

The Altyx team consists of five employees based in London. Bรฉrangรจre Salembien, who is dual-qualified as a Chartered Financial Planner in the UK and as a Wealth Management Advisor in France, will retain operational leadership of the British entity and continue developing Altyx Financial Planning, which becomes Groupe Allenโ€™s operating brand in the United Kingdom.

Sandrine Genet, Founder and Chairwoman of Groupe Allen, commented:

โ€œLondon is home to between 200,000 and 250,000 French nationals, often facing complex wealth situations, with the UK financial marketplace being one of Europeโ€™s leading financial centres. Groupe Allenโ€™s ambition for several years has been to become the French benchmark in wealth advisory services for families and entrepreneurs on a European scale.

We have always intended to have a presence in the UK, and now Altyx provides us with the credibility and local roots needed to establish ourselves there. This venture is also the meeting of minds with a highly respected leader, Bรฉrangรจre Salembien, and a consulting culture fully aligned with our own.โ€

Bรฉrangรจre Salembien, Managing Director of Altyx Financial Planning, added:

โ€œWe are delighted by this acquisition by Groupe Allen, a group determined to establish itself in the United Kingdom. From our very first meeting, it became clear that Sandrine and I shared the same ethics and vision on how best to serve our clients. Such alignment is quite rare, and itโ€™s what made us want to move forward together. This new stage for Altyx Financial Planning will allow us to strengthen our presence in the UK market while continuing to serve our loyal clients with the integrity and values that define Altyx.โ€

With this transaction, Groupe Allen reinforces its position as an independent consolidating player capable of implementing a structured external growth strategy while preserving the identity of local teams and brands.

The financial details of the transaction were undisclosed. 

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