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Semin O

Partner
Works at the highest professional level, always keeping the client's business interests in mind.
Client, Legal 500 2022
About

Semin O has extensive experience in advising on all matters of antitrust law.

He specializes in advising on all antitrust law aspects of complex cross-border M&A transactions. His expertise includes the planning and coordination of worldwide merger control proceedings (both with the European Commission and national authorities) including Phase II proceedings as well as advice in complex joint venture constellations.

Another focus of his practice also includes advice on cross-border cartel investigations, cartel defense before competition authorities and courts (including EU courts) and the design and implementation of compliance and distribution systems.

Professional QualificationsRechtsanwalt admitted with Rechtsanwaltskammer Frankfurt am Main
Languages
  • German
  • English
Education
  • Johann-Wolfgang Goethe University Frankfurt, First State Examination, 2004

  • Higher Regional Court of Frankfurt am Main, Second State Examination, 2010

Awards

  • JUVE Handbook 2023/2024: Frequently recommended for antitrust law; "good and efficient cooperation", competitor.
  • Legal 500 Germany 2025: Recommended for antitrust law; “Semin O knows what clients need and stands out for his expertise in merger control and in particular in abuse proceedings.”, “Semin O is always available, keeps an overview in complex situations, creates significant added value for clients and is pragmatic. Unreservedly recommended.”, “We recommend Semin O.”.
  • Handelsblatt in cooperation with Best Lawyers 2024/2025: Recommended for competition/antitrust law.
  • Who's Who Legal Competition and Global Competition Review: "Future Leader".
  • WirtschaftsWoche 2021: Recommended as “top lawyer” for antitrust.

Prior Experience

Prior to joining DLA Piper, Semin has worked as an associate at a leading international law firm. He has gained international professional experience working in the Brussels and New York offices of leading international and German law firms.

Memberships And Affiliations

  • Association of German, Austrian and Swiss lawyers with a special interest in antitrust law
  • Kartellrechtsforum Frankfurt e. V.
  • German Korean lawyers association
  • International Association of Korean Lawyers

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