Siegfried de Witt

Claudia Gehricke, born 1986 in Berlin, studied law at the European University Viadrina in Frankfurt/Oder and at the University of Essex, UK. She completed her legal traineeship in Berlin at the Court of Appeal and was already working at ZENK’s Berlin office during her traineeship. Further stages of her legal traineeship took her to the Federal Ministry of Economics and an international business enterprise, among others. Claudia Gehricke has been a lawyer at ZENK since 2015. She is a sal...

As a Patent Attorney Thomas L. Bittner focuses on technical intellectual property rights, especially patents and utility models, both with respect to filing and prosecution, as well as litigation. Also, he advises and represents his clients in opposition proceedings and revocation proceedings before the German authorities and courts, and before the European Patent Office. Thomas L. Bittner studied physics at the Humboldt-Universität of Berlin. After his PhD he worked as a scholarship hol...

Viviane Freifrau von Aretin is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law. Viviane Freifrau, who practices law in Berlin, Germany, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Viviane Freifrau is held by other top lawyers in the same geographic and legal practice area.

Martin Nentwig is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Mergers and Acquisitions Law. Martin, who practices law in Berlin, Germany, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Martin is held by other top lawyers in the same geographic and legal practice area.

Prof Dr Thomas Höppner is a partner with Geradin Partners. Before joining Geradin Partners in 2025, Thomas was a partner at Hausfeld for ten years. With over 20 years of experience, Thomas has advised clients on a broad range of contentious and non-contentious antitrust and regulatory matters. He has assisted clients on numerous high-stake investigations, including some of the most complex cases in the tech, media and network industries. Thomas is also a trusted litigator on matters of E...

Dr. Ann-Christin Richter is Deputy Managing Partner at Hausfeld in Berlin. She advises on all aspects of competition law and represents clients in antitrust and IP litigation. Ann-Christin specializes in representing clients in cartel damages actions, both on the plaintiff’s and the defendant’s side. She is also experienced in defending clients in cartel investigations by competition authorities and in conducting internal investigations. A further focus of Ann-Christin’s pra...

Dr Stefan Lebek is a partner and co-head of real estate at POELLATH in Berlin. He specialises in private real estate law with a focus on advice during real estate transactions (due diligence, asset and share deals, lease agreements, financing agreements, real estate-related corporate law), as well as in providing legal advice in connection with project development, joint ventures and real estate private equity investments. He also renders legal advice on all aspects of real estate-related pub...

Dr Jan Hennig (Lawyer of the Year Environmental Law, Berlin, 2023) has been equity partner with GSK Stockmann since 2014. He is a certified specialist for administrative law. Practice: Planning law, public construction law, environmental regulations Project development Structuring projects with public sector clients Regulation / Constitutional and European law Short Biography: Worked for a major international law firm in the field of public commercial law and projects from 2006 to 2014 Traine...

Sebastian Lutz-Bachmann is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law. Sebastian, who practices law in Berlin, Germany, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sebastian is held by other top lawyers in the same geographic and legal practice area.

Uwe Bärenz is a partner at POELLATH in Berlin. He focuses on private investment funds, GP and investors advice. He is predominantly engaged in private equity funds, including cross-border work, mainly Luxembourg, tax and regulatory issues, filings, terms and conditions, private and public placements, investors' needs (pension funds, insurance companies, investment funds, fund of funds, private clients), complex secondary transactions. He is one of the most experienced advisors for the es...