Rainer Thum

Partner Attorney-at-Law and Certified Tax Advisor

Sarah Rost has been practising law in Germany since 2009 and has been with FPS in Frankfurt since 2019. She advises clients from diverse industries—including cosmetics, lifestyle, luxury goods, software, events, personnel services, and advertising—on intellectual property, contract, and data protection law. Her work includes managing large brand portfolios, handling trademark applications, registrations, and enforcement in Germany and internationally, and representing clients befo...

Karl-Heinz Metten is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Attorney. Karl-Heinz, who practices law in Frankfurt/Main, Germany, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Karl-Heinz is held by other top lawyers in the same geographic and legal practice area.

Gerhard Gündel is a top attorney recognized by Best Lawyers in the practice area(s) of Mergers and Acquisitions Law. Gerhard, who practices law in Frankfurt/Main, Germany, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Gerhard is held by other top lawyers in the same geographic and legal practice area.

Matthias Rüdt von Collenberg is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Matthias, who practices law in Frankfurt/Main, Germany, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Matthias is held by other top lawyers in the same geographic and legal practice area.

Lars Weber is a top attorney recognized by Best Lawyers in the practice area(s) of Mergers and Acquisitions Law. Lars, who practices law in Frankfurt/Main, Germany, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Lars is held by other top lawyers in the same geographic and legal practice area.

Nicolas M. Dumont is a top attorney recognized by Best Lawyers in the practice area(s) of Intellectual Property Law and Patent Attorney. Nicolas M., who practices law in Frankfurt/Main, Germany, has been recognized since 2022. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Nicolas M. is held by other top lawyers in the same geographic and legal practice area.

Andreas Steck is a top attorney recognized by Best Lawyers in the practice area(s) of Banking and Finance Law and Regulatory Practice. Andreas, who practices law in Frankfurt/Main, Germany, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Andreas is held by other top lawyers in the same geographic and legal practice area.

Prof. Dr. Antje Boldt joined RITTERSHAUS in 2021 as partner. She specialises in advising on the preparation and implementation of projects in the areas of infrastructure, school and day-care centre construction as well as health care, e.g. hospital construction. In particular, she focuses on new contract management forms of the integrated project alliance and methods from Lean Construction Management and Building Information Modelling. Antje Boldt is a professor of commercial law at the Frese...

Joachim Heffinger Attorney Certified specialist in building and architects’ law Mediator (DAA/German Lawyers’ Academy) Specialist mediator for the real estate and construction industries (m-con) Partner Specialists areas : Private construction and property law, architectural and engineering law, commercial tenancy law, m ediation/arbitration proceedings Since being admitted to the bar in 1987, I have primarily advised clients in the areas of private construction, real estate, arch...