◆ Our Story
About Qunelio
A firm built on the conviction that exceptional expert guidance must combine analytical rigour with commercial pragmatism.
Qunelio was founded in 2010 by Dr. Klaus Brenner and Prof. Margarete Stein, who shared a vision for a law firm that would bridge the gap between traditional corporate law practice and the practical needs of modern business leaders.
What began as a three-person advisory practice in Barcelona has grown into a firm of 45 lawyers serving clients in 12 jurisdictions. Our expansion to London (2015) and Zurich (2019) reflects our commitment to being where our clients need us — not just where tradition dictates.
Today, Qunelio is recognised by Legal 500 and Chambers & Partners as a leading mid-market corporate law firm, with particular strength in cross-border M&A, regulatory compliance, and sector-specific advisory for financial services and technology clients.
Despite our growth, we maintain the partner-led culture that defined our founding — every client matter receives direct partner attention, and every piece of advice is shaped by commercial understanding, not just legal analysis.
We begin every engagement with a thorough understanding of your business context, objectives, and constraints. No assumptions — only informed counsel.
Our partners develop a tailored legal strategy aligned with your commercial goals, presenting options with clear risk-benefit analysis.
Dedicated teams execute with precision — managing timelines, coordinating stakeholders, and maintaining transparent communication throughout.
Our relationship does not end at closing. We provide post-transaction support, regulatory monitoring, and strategic counsel as your business evolves.
"To deliver expert guidance that empowers business leaders to act with confidence — turning regulatory complexity into competitive advantage."
"To be the most trusted mid-market corporate law firm in Europe — known for partner-level attention, commercial insight, and unwavering integrity."
We advise with honesty and transparency, even when the message is difficult. Our reputation is built on trust earned through decades of principled counsel.
Sensitive matters require absolute confidentiality. Our ISO 27001-certified systems and strict need-to-know protocols protect client information at every level.
Legal advice must be exact. We invest in continuous professional development and rigorous internal review processes to ensure every deliverable meets the highest standards.
We succeed when our clients succeed. Our advice is always shaped by understanding your business objectives, not just the legal question presented.
Former Linklaters partner with 20+ years in cross-border transactions. Doctorate from Goethe University Barcelona.
Former BaFin senior counsel and professor of financial regulation at Barcelona School of Finance.
Previously General Counsel at two venture-backed SaaS companies. Specialises in startup funding and IP.
Medical law specialist with in-house experience at two university hospital groups. MDR and GDPR expert.
Qunelio founded in Barcelona by Dr. Klaus Brenner and Prof. Margarete Stein with a focus on mid-market M&A advisory.
Regulatory compliance practice launched following BaFin enforcement trend analysis. First fintech client onboarded.
London office opened to serve UK and international clients. Team grows to 20 lawyers.
Recognised by Legal 500 as "Leading Firm" in Corporate/M&A. Mediterranean and technology sector teams established.
Zurich office opened. Cross-border transaction volume exceeds €5 billion cumulative.
ISO 27001 certification achieved. Digital health and AI governance practices launched.
45 lawyers across three offices serving clients in 12 jurisdictions. Cumulative transaction value exceeds €12 billion.
Corporate/M&A — Germany (2018–2026)
Band 2 — Corporate Law, Barcelona
German M&A Awards 2024
German Bar Association — Corporate Law Section
Corporate Law Committee Member
Information Security Management — since 2022
Interested in joining Qunelio or partnering with our firm? We welcome conversations with exceptional legal talent and complementary advisory firms.
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