Attorney Detail Banner

Dr. Andreas Ruster is a German-qualified attorney (Rechtsanwalt) with extensive expertise in handling clients’ complex litigation matters throughout all stages of the litigation life-cycle. Dr. Ruster provides strategic pre-litigation advice and he represents clients in court and arbitration proceedings as well as settlement negotiations and enforcement procedures.

Dr. Ruster assists clients in various industries and fields. He has particular experience in pursuing claims against governments and state bodies as well as in dealing with new technologies and innovative legal issues. Dr. Ruster is also very active in antitrust litigation (cartel damages, abuse of dominance, state aid, etc.), where he has successfully represented both plaintiffs and defendants. His practice further covers, among others, GDPR/privacy damages, product liability and patent/IP cases.

Dr. Ruster combines academic excellence (he gained 1st place in both German legal state exams; his doctorate was awarded summa cum laude) with a strong business sense, a solution-driven, and pragmatic outlook, as well as clear communication. Having lived in France, the UK, and the US, he is happy to assist clients in both English and French, as well as his native German.

Dr. Ruster regularly publishes, speaks, and lectures on topics related to his practice areas. Prior to joining Quinn Emanuel, Dr. Ruster was an associate with another first-tier U.S. law firm.

  • Legal services providers bundling claims for group of sawmills in >EUR 1 bn. damages litigation against five German federal states (plaintiff)
  • Legal services provider bundling claims for group of companies in >EUR 300 mio. antitrust damages litigation (plaintiff)
  • US/UK-based inter-dealer broker in Federal Cartel Office proceedings (complainant)
  • French Euronext listed corporation with regard to commercial litigation in Germany (complainant)
  • Real estate company in commercial litigation in Germany (plaintiff)
  • Daimler AG in several antitrust damages cases in Germany (plaintiff) and with regard to antitrust damages litigation in the U.S. (defendant)
  • Liberty Global/Unitymedia in antitrust (abuse of dominance) damages litigation (plaintiff)
  • Singapore Airlines in >EUR 3 bn. antitrust damages litigation (defendant)
  • Antitrust & Competition
  • Appellate Practice
  • Class Action Litigation
  • Commercial Litigation
  • Intellectual Property Litigation
  • International Arbitration
  • International Disputes
  • Internet Litigation
  • Life Science: Mass Torts and Product Liability Litigation
  • Life Science: Pharmaceutical Antitrust Litigation
  • Litigation Representing Plaintiffs
  • Patent Litigation
  • Private Equity Fund Litigation
  • Product Liability & Mass Torts Litigation
  • Trademark, Trade Dress, Unfair Competition/False Advertising, and Publicity Rights Litigation
  • State of Hamburg, Hamburg Court of Appeals
    (2nd State Examination, honours and #1 ranking)
  • Humboldt University of Berlin
    (PhD in Law / Dr. iur., summa cum laude)
  • King’s College London
    (LL.M., honours and top 1%)
  • Humboldt University of Berlin and University of Cologne
    (1st State Examination, honours and #1 ranking)
  • University of Paris II Panthéon-Assas
    (maîtrise en droit, honours and top 1%)
  • The German Bar (Hanseatische Rechtsanwaltskammer Hamburg)
  • German
  • English
  • French
  • Latham & Watkins LLP:
    • Associate
  • Ranked by The Best Lawyers in Germany: Ones to Watch Competition/Antitrust Law, Intellectual Property Law, Litigation, 2024
  • Ranked in Litigation by The Best Lawyers in Germany: Ones to Watch, 2023
  • Recognized by Euromoney’s Rising Stars for Competition & Antitrust, 2022
  • Shortlist Concurrences Antitrust Writing Awards (2021)

Book and book chapters

  • Intertemporaler Anwendungsbereich, in: Bien/Käseberg/Klumpe/Körber/Ost, Das neue Kartellrecht. Die 10. GWB-Novelle (with R. Lahme), Verlag C.H. Beck, München 2021
  • Kartellregress, in: Stancke/Weidenbach/ Lahme, Kartellrechtliche Schadensersatzklagen, R&W, Frankfurt a.M. 2021 (2. ed.) / 2017 (1. ed.)
  • Zugang zu Informationen, in: Stancke/Weidenbach/Lahme, Kartellrechtliche Schadensersatzklagen, R&W, Frankfurt a.M. 2021 (2. ed.) / 2017 (1. ed.)
  • Patentschutz für menschliche Stammzellen. Eine rechtsvergleichende Untersuchung der ethischen und ökonomischen Grenzen der Patentierung pluripotenter Stammzellen. Mohr Siebeck, Tübingen 2015 (reviewed in Zech, JZ 2016, 1006; Elger, sic! 2017, 784; Faltus, MedR 2018)


  • Der kartellrechtliche Beseitigungsanspruch als verschuldensunabhängiger Schadensersatzanspruch (with R. Lahme), ZWeR 2021, 544-564
  • Zwei auf einen Streich: Sammelklage-Inkasso im Insolvenzrecht und darüber hinaus; weiche Patronatserklärung (allein) zur Begründung der Fortbestehensprognose nur ausnahmsweise ausreichend, Anmerkung zu BGH, Urteil vom 13. Juli 2021, Az.: II ZR 84/20 (with J. Ruster), BB 2021, 2195-2196
  • Nachhaltigkeit im Sachenrecht, JZ 2021, 1106-1111
  • Prozessuale und materielle Bestimmtheitsanforderungen auf dem Prüfstand des Kartellschadensersatzrechts (with R. Lahme und A. Helle), WuW 2021, 276-281 (Teil 1) und 330-336 (Teil 2)
  • Disclosure in European Competition Litigation Through the Lens of U.S. Discovery (with S. von Massow), World Competition Journal 2020, 347-372 (Concurrences Antitrust Writing Awards Nominee)
  • In for a Penny, in for a Pound? Legal Professional Privilege as a Shield Against Disclosure in Private Antitrust Litigation in Europe (with S. von Massow), Journal of European Competition Law & Practice 2020, 22-34
  • Die Mietpreisbremse als Wegbereiter für das Zessionsmodell, Anmerkung zu BGH, Urteil vom 27. November 2019, Az. VIII ZR 285/18, NZM 2020, 52-53
  • Der zeitliche Anwendungsbereich des § 33g GWB. Ein fiktives Streitgespräch (with R. Lahme), NZKart 2019, 645-650
  • Die rückwirkende Heilung schwebend unwirksamer EU-Auslandszustellungen, NJW 2019, 3186-3190
  • Zur Berechnung der Verjährungshemmung nach § 209 BGB (with R. Lahme), NZKart 2019, 544-545
  • Das ungeschriebene Merkmal der Kartellbefangenheit (with R. Lahme), NZKart 2019, 196-201
  • Lecturer, Leuphana University Lüneburg (since 2018)
  • Lecturer, PFH Göttingen (since 2018)
  • Competition Litigation Forum
  • Studienvereinigung Kartellrecht