Counsel Senior

Dr. Klaus W. Riehmer

Corporate & Securities

"Energetic, forceful, and endlessly experienced, Klaus Riehmer focuses his practice on private and public M&A transactions." 
Chambers Global and Chambers Europe


Clients rely on Klaus Riehmer’s counsel on national and cross-border M&A transactions, including public takeovers, private M&A, and corporate projects. He also advises clients on corporate law and corporate restructurings. During his practice of more than 30 years, Klaus has been involved in important high-volume M&A projects in a variety of industries, including in financial services, automotive, chemical, pharmaceuticals, telecommunications, and information technology.



  • Vodafone on its takeover of Mannesmann, one of the largest M&A transactions globally.
  • HypoVerereinsbank on its merger with Unicredit, one of the largest cross-border bank mergers in Europe.
  • Helaba on the acquisition of substantial business units of former WestLB.
  • United Technologies in connection with various transactions in Germany and Central Europe.
  • Deutsche Bahn on the acquisition of the largest private railway company in Poland.
  • Lafarge on the sale of significant business units.
  • Publicis Groupe on acquisitions in Germany and the squeeze-out of minority shareholders of Pixelpark AG.
  • Beijing Enterprises on the acquisition of EEW Energy from Waste GmbH from EQT.


  • "Senior Statesperson" for Corporate/M&A in Germany – Chambers Europe
  • Ranked in Band 1 for Corporate/M&A: Mid-Market in Germany by Chambers Global and Chambers Europe.
  • "Klaus Riehmer benefits from impressive experience in international M&A deals, including joint ventures. He handles both public and private M&A." – Chambers Global and Chambers Europe


  • Second State Law Examination (bar exam), Hamburg
  • Legal Clerkship (Referendariat), Hamburg
  • First State Law Examination, Munich

Inscription au Barreau

  • Frankfurt am Main, Germany


  • Allemand
  • Anglais
  • Espagnol

Engagement professionnel et communautaire

  • Former member of Mayer Brown M&A Leadership Group
  • Former member of the faculty of University St. Gallen (postgraduate program)
  • Widely published especially on German takeover law and corporate law
  • Co-editor and co-author of Being a Board Member in Germany, an English-language guide for board members of German companies