Arendt today unveils a renewed senior leadership team that will take office on 1 April for a three-year term.
Gilles Dusemon and Thierry Lesage will serve as Co-Chairs of Arendt, while Jean-Marc Ueberecken has been re-elected as Managing Partner. Gilles and Thierry succeed Michèle Eisenhuth and Claude Niedner, whom we warmly thank for their contribution as Co-Chairs of Arendt and their long-standing commitment to the firm. Claude will continue in his role as Partner and will leverage his extensive professional experience as a leading Luxembourg lawyer to support the Arendt Regulatory team in further developing this strategic area of expertise. Michèle will retire from her Partner role and focus on new personal projects after many years of valuable contribution.
Building on its strong Luxembourg roots, Arendt enters this next chapter defined by continuity, shared values and unwavering ambition. The goal is to reaffirm Arendt’s pre-eminence in the Luxembourg market while accelerating its growth as a leading European player and the 6th largest law firm in Europe.
“This next chapter reflects both who we are and where we are going: a firm with strong values, clear ambition and full confidence in our ability to continue contributing positively to Luxembourg’s financial centre and supporting Europe’s evolving regulatory environment. Collaborating with Thierry and Gilles as they take on their Co‑Chair roles ensures strong continuity between our strategic vision and its implementation,” comments Jean-Marc Ueberecken.
A unique multidisciplinary platform with unmatched depth
As recently announced, Arendt and BlackFin Capital Partners have entered into a partnership to support the international expansion of Arendt Investor Services (AIS), with BlackFin becoming the majority shareholder while Arendt retains a significant stake. This transaction reinforces Arendt’s long-term vision, further enhances the firm’s multidisciplinary model and positions AIS to accelerate its growth across Europe by combining BlackFin’s operational expertise with Arendt’s deep regulatory, legal, tax and advisory capabilities.
Arendt’s competitive strength lies in the breadth and depth of its expertise, covering legal, tax, regulatory, advisory and investor services. Its integrated and multidisciplinary model enables clients to navigate increasingly complex environments with confidence, benefitting from teams whose technical excellence, sector insight and forward-looking mindset provide a decisive advantage. Arendt employs more than 1,250 professionals across all its entities, which collectively recorded a total revenue of EUR 345 million, an increase of 6% compared to last year, reflecting the depth of the firm’s platform.
“Our multidisciplinary model is more than a set-up, it is a strategic asset for our clients. By bringing together an unparalleled range of expertise, we deliver solutions that are both pragmatic and future- proof, designed to support clients through complexity, regulation and transformation. Working alongside Gilles in this new role is a privilege, and I look forward to the shared responsibility of guiding the firm forward,” comments Thierry Lesage.
An AI‑forward, innovation‑led firm, delivering tangible benefits to clients
Innovation and technology have become central pillars of Arendt’s strategy. The firm continues to invest heavily in AI adoption, digitalisation and new service models. These investments directly enhance service quality by improving efficiency, transparency and the ability to anticipate clients’ needs.
“Innovation is not a separate initiative, it is part of our everyday work. Our responsibility is to translate strategy into concrete tools and processes that enhance the way we serve clients. With AI and technology, we are accelerating what we have already started: creating new ways of working where people and innovation reinforce one another,” explains Jean-Marc Ueberecken.
Deeply rooted in Luxembourg, committed to its future
As a long-standing contributor to Luxembourg’s financial centre, Arendt plays an active role in shaping the evolution of the market. The firm engages in continuous dialogue with clients, policymakers and leading voices inside and outside the financial community to help drive the industry forward. Arendt also collaborates with the University of Luxembourg, notably through its contribution to the Master’s in Investment Funds Law, and trains many of the professionals who will strengthen the financial centre, whether they build their careers at Arendt or elsewhere. These initiatives underline the firm’s long-term commitment to supporting the growth and resilience of Luxembourg’s financial ecosystem.
“Our firm has grown with Luxembourg, and our commitment to its ecosystem is stronger than ever. We play an active role in the financial centre and have a responsibility towards our people, our clients and the community. The impact we have today must help shape the Luxembourg of tomorrow. Co-chairing Arendt with Thierry is an honour, and together we are committed to strengthening the firm’s mission and long-term vision,” comments Gilles Dusemon.
A strengthened strategic platform for the years ahead
Through its renewed senior leadership team and the integration of its legal, tax, regulatory, advisory and investor services capabilities, Arendt will continue to consolidate its leading role in Luxembourg while expanding its reach across Europe. This strengthened platform ensures the firm remains uniquely positioned to deliver comprehensive, high-quality services in an increasingly complex and fast-evolving environment.
