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Maximilian Vonthien
Counsel

Dr. Maximilian Vonthien, LL.M. (Columbia)

Rechtsanwalt

Languages
  • German
  • English

Maximilian Vonthien advises clients on protecting their intellectual property, with a focus on digital business. He primarily advises on matters of copyright, contract and AI law.

A key focus of his work is advising clients on the review and drafting of contracts. Maximilian Vonthien has extensive expertise in implementing complex licensing contract structures in the digital business environment. He also advises companies on developing AI policies and prepares legal opinions on questions relating to the AI Act and adjacent areas of law, in particular copyright and unfair competition law. In addition, Maximilian Vonthien represents clients in court in copyright and unfair competition disputes.

He regularly gives lectures and webinars on AI law topics and is the (co-)author of various publications on copyright and AI law. He is Co-Head of CMS’s internal AI Focus Group and a member of BITKOM’s Artificial Intelligence Working Group.

Maximilian Vonthien joined CMS as a lawyer in 2020. In 2026, he was appointed Counsel.

Publications

  • "GPAI-Verhaltenskodex - Warum sofortiges Handeln im Rahmen des EU AI Act entscheidend ist" Blog-Beitrag v. 04.09.2025 in Kooperation mit Capgemini Invent, Co-Autoren von CMS: David Rappenglück und Sara Kapur
  • "GPAI-Compliance: EU-Leitlinien veröffentlicht", Blog-Beitrag v. 01.08.2025, Co-Autor: David Rappenglück
  • "§ 16 Immaterialgüterrecht", Kaulartz/Merkle, Rechtshandbuch KI, 2. Auflage 2025, Co-Autor: Prof. Dr. Winfried Bullinger
  • "Art. 4 KI-VO operativ umsetzen - Ein Drei-Säulen-Ansatz für KI-Kompetenz, KI-Governance und KI-Compliance im Unternehmen", RDI 2025, 398, Co-Autor: David Rappenglück
  • "Cybersicherheit von Hochrisiko-KI und der Cyber Resilience Act", Blog-Beitrag v. 16.04.2025, Co-Autor: Huy Do Chi
  • "KI im Koalitionsvertrag 2025: Was jetzt auf Unternehmen zukommt", Blog-Beitrag v. 15.04.2025, Co-Autor: David Rappenglück
  • "Of Dice and Cheese – Zum Urheberrechtsschutz von KI-Erzeugnissen aus Sicht des U.S. Copyright Offices", Blog-Beitrag v. 21.02.2025, Co-Autoren Dr. Ole Jani und Dr. Felicitas Kahl
  • "Umsetzung der KI-VO: Der Referentenentwurf zum KI-Marktüberwachungsgesetz", Blog-Beitrag v. 29.01.2025, Co-Autor: David Rappenglück
  • "UPDATE – GPAI-Modelle und Urheberrecht: Zweiter Entwurf eines Praxisleitfadens veröffentlicht", Blog-Beitrag v. 09.01.2025
  • "GPAI-Modelle und Urheberrecht: Erster Entwurf eines Praxisleitfadens veröffentlicht", Blog-Beitrag v. 19.12.2024
  • "KI-Verordnung und Urheberrecht", Mitteilungen der Deutschen Patentanwälte, 2024, 441; Mitautor: Prof. Dr. Winfried Bullinger
  • "Erstes Urteil Deutschlands zur urheberrechtlichen Zulässigkeit des KI-Trainings ergangen", Blog- Beitrag v. 15.10.2024; Mitautor: Adrian Zarm
  • "Generative KI und Urheberrecht - Herausforderungen für Rechteinhaber und Nutzer", Blog-Beitrag v. 18.09.2023 auf dem CMS Blog
  • "'KI-Training' und Urheberrecht", Mitteilungen der deutschen Patentanwälte 2023, 446; Mitautor: Prof. Dr. Winfried Bullinger
  • "Verhältnis von vertraglichem und deliktischem Schadensersatz im Urheberrecht", GRUR-Prax 2023, 610; Mitautor Prof. Dr. Winfried Bullinger
  • OLG Frankfurt a.M.: "Grenzen der Parodie bei Lichtbildern", GRUR-Prax 2023, 272; Mitautor Prof. Dr. Winfried Bullinger
  • Zur Einordnung von Tethered Downloads als Privatkopien gemäß § 53 Abs.1 UrhG, ZUM 2023, 73; Mitautor: Dr. Ole Jani
  • "Die Bemessung der Höhe des Streitwerts von urheberrechtlichen Unterlassungsansprüchen bei der unerlaubten Verwendung von Produktfotos", Gewerblicher Rechtsschutz und Urheberrecht in der Praxis (GRUR-Prax), 2022, S. 565; Mitautor Prof. Dr. Winfried Bullinger
  • Online-Komponenten digitaler Spiele – Eine rechtliche Untersuchung ihres Supports, ihrer Wiederherstellung und ihrer Eliminierung, Springer, 2020 (Dissertation)

Lectures list

  • “Compliance Session 2025 | AI Competence for Legal and Compliance Managers” – Webinar as part of the Compliance Session series, together with Martin Schulz and Markus Kaulartz, in 2025.
  • “Generative AI, Copyright and Media Law” – Webinar for a client, together with Max-Julian Wiedemann, on copyright topics related to the use of generative AI, in 2025.
  • “AI Compliance – Implementing AI Governance and Achieving AI Literacy” – Webinar for a client on AI compliance, in 2025.
  • “AI Compliance – Implementing AI Governance and Achieving AI Literacy” – Presentation at the AAE World Congress Hamburg on 1 July 2025.
  • “AI Compliance in Corporate Practice” – Presentation at the Bitkom Forum Recht in Berlin on 30 April 2025, together with David Rappenglück.
  • “Generative AI, Copyright and Media Law” – Webinar on 12 July 2024, together with Max-Julian Wiedemann.
  • “Copyright and Generative AI” – Presentation at the AI Summit of the German Association of Corporate Counsel (Bundesverband der Unternehmensjuristen) in Munich on 12 March 2024.
  • “Copyright and Generative AI” – Presentation at the AI Summit of the German Association of Corporate Counsel (Bundesverband der Unternehmensjuristen) in Munich on 8 February 2024.
  • “AI in Digital Marketing – Law & Practice” – Event on 5 December 2023, in cooperation with webnetz.
  • “AI in Focus” (AI and Copyright) – Event on 26 June 2023 at the CMS office in Berlin.
  • “AI in Focus” (AI and Copyright) – Event on 29 June 2023 at the CMS office in Frankfurt.

Education

  • 2020: Second state examination in law
  • 2019: PhD; thesis on contract and copyright law
  • 2018 - 2020: Trainee lawyer in Berlin
  • 2014 - 2018: Research assistant at Taylor Wessing and Hengeler Müller in Berlin (IP, IT and copyright law)
  • 2013 - 2014: LL.M. at Columbia Law School, New York
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