Oliver Geiss focuses his practice on competition law in the European Union and Germany.

    He has represented companies in some of the largest EU cartel investigations both before the EU Commission and the European Courts, including the Air Freight, LCD Screen, Optical Disk Drives and Refrigeration Compressors, as well as in civil damage actions before national Courts.  Oliver is at the forefront of developments and regularly publishes in this area.

    Oliver also regularly advises clients on merger notifications of cross-border transactions with the European Commission, the German Federal Cartel Office and other competition authorities throughout Europe.  Oliver has extensive experience in a variety of industry sectors including chemicals, energy, fast-moving consumer goods, pharmaceuticals and telecommunications.  He frequently represents clients before the European Courts in Luxembourg and also advises clients on EU state aid law and competition law aspects of commercial agreements such as distribution agreements or joint buying or selling arrangements.

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    • Representing clients in five major cartel investigations before the European Commission, including two of the five largest cartels.
    • Representing clients in cartel investigations before the German authority and coordinating the defense across multiple jurisdictions.
    • Defending clients in civil cartel damage litigation, including the largest cartel damage case ever brought before German CourtsSecuring EC merger approval of a US$3.2 billion merger between two major chemical companies and securing multicountry approvals of mergers in the pharmaceuticals, market research and medical devices sectors.
    • Representing a major US-based petrochemical corporation and a beverage manufacturer from the new EU Member States in State aid proceedings before the European Commission and European Court of Justice.


    • Higher Regional Court of Darmstadt, Second State Examination, 2000
    • Johann Wolfgang Goethe-University, Lic. Jur., 1998
    • Johann Wolfgang Goethe-University, First State Examination, 1998
    • University of Leicester, Certificate, English Legal Studies, 1996
    • Johann Wolfgang Goethe-University, Vordiplom, 1998


    • Germany, 2001


    • German
    • English
    • French
    • Recommended in The Legal 500 Europe, Middle East & Africa 2016 in Competition - EU and global, Belgium
    • Named as a “rising star” for Competition & Antitrust in Belgium by Expert Guides 2016
    • Recommended in The Legal 500 EMEA 2016 Edition
    • Recommended in Chambers Europe 2015 Edition
    • Recommended in The Legal 500 EMEA 2015 Edition
    • "Up-and-coming partner Oliver Geiss is highlighted by interviewees for his technical understanding of complex procedures.” Chambers 2014

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