Dr. Marcus Grosch

Dr. Marcus Grosch is a German qualified attorney (Rechtsanwalt) and Managing Partner of the German offices. Marcus is a litigator with 25 years of court room experience. He focuses on complex civil litigation, with an emphasis on patent and commercial litigation. Marcus regularly represents industry leading clients in all sectors including high-tech, automotive, life-science, chemical and finance. He has been lead counsel in numerous high-stakes cases and has outstanding experience in coordinating lawsuits in multiple jurisdictions. 

Marcus is one of the rare European “trial lawyers” (to use the American equivalent) who has led cases in all relevant German courts, the EPO (Opposition Divisions and Boards of Appeal), the German PTO and the UPC. Marcus has pleaded several hundred of significant cases before the German District and Appellate Courts, including the Federal Supreme Court in nullity appeals. He is intimately familiar with all aspects of procedural law and practice, including interim relief, rules of evidence as well as appeal and has in depth experience regarding all aspects of international procedure, including section 1782 USC motions (US federal discovery assisting foreign litigation). He has been successful in several legal milestone cases, including cases against the odds like the Federal Supreme Court’s widely cited leading precedent changing the law on the stay of injunctive relief which was based on one of the extremely rare motions for reconsideration (BGHZ 202, 288 – for Motorola/Google versus Microsoft).  

Beyond his court room practice, Marcus has significant experience in all fields of complex dispute resolution, including commercial litigation strategy, finance litigation and international arbitration. For years, he has been a lead strategy advisor to one of the biggest automotive OEMs in the Diesel emission litigation and regularly acts in complex arbitration matters in various fields, including construction and energy. Marcus has advised clients in corporate litigation matters, including cases for interim relief regarding voting rights and take-over scenarios as well as banks and funds in disputes over financial investments.  

For the last 20 years, Marcus has been regularly awarded top ratings in leading international and German ranking publications (see detailed list under “Awards”). 

He won the “Practitioner of the Year” award for Germany (Patent: Law Firms) for Managing IP EMEA in 2024, while the Managing IP’s rankings have named Marcus as a “Patent Star” since 2016.  

In the 2025 rankings for Chambers Global, Marcus was once again ranked Band 1 for patent litigation in Germany, with sources saying, “Marcus Grosch is an excellent and creative oral advocate who shines when arguing in hearings. He quickly grasps difficult technical arguments and can pivot flawlessly in hearings when necessary.” and “Marcus Grosch is an amazing lawyer who is able to handle complex technical cases.” Chambers Germany 2025 also recommends him for patent litigation in Germany. He is also recognized by Chambers Global for his “Foreign Expertise in USA”. 

In their 2025 rankings, Legal 500 Deutschland and Legal 500 EMEA have  placed Marcus again in their Hall of Fame for patent litigation in Germany, where sources commented that he is “available at any time with his comprehensive expert knowledge ‘on demand’”.

Marcus has been ranked by Leaders League as “Leading” for Patent Litigation in their 2024 rankings. Leaders League have also ranked him for Commercial Litigation in 2025, and for International Arbitration in 2025. 

JUVE once again named him a “Leading Individual” for patent litigation in their 2024/2025 rankings, with clients praising Marcus’ ability to “efficiently guides cases by hitting the nail on the head” and competitors calling him an “impressive litigator”. He has been ranked by JUVE for patent litigation since 2012. He has also been ranked by JUVE as a „Leading Individual“ for Dispute Resolution in Germany since 2021. Marcus was listed as a „Recommended Individual“ by JUVE Patent in their inaugural UPC Litigation 2025 rankings, with clients calling him a „top lawyer“ and with competitors praising him as an „excellent litigator with great experience in coordinating lawsuits in multiple jurisdictions.”

Calling him a “fierce advocate and formidable adversary” the 2024 rankings for IAM Patent 1000 has not only once again ranked Marcus in their “Gold” category for “Recommended Individuals” for patent infringement cases in Germany. Marcus was also selected for the 2024 edition of the IAM Global Leaders Guide, which features the IP elite from across the IAM Patent 1000 rankings.  

Lawdragon recognized Marcus in 2024 in their inaugural list of "500 Global Plaintiff Lawyers" for Complex & Patent Litigation. 

In their 2024 rankings, Who’s Who Legal has again recognized Marcus as a “Thought Leader” in Germany for Intellectual Property. 

Marcus was recognized as a “Litigation Star” by Benchmark Litigation in their 2024 rankings. 

He was ranked #1 in the WirtschaftsWoche “Legal All Stars 2023” rankings for patent litigation in Germany and in 2024 was ranked as a “TOP Anwalt” for patent litigation in Germany for the seventh time in WirtschaftWoche’s “TOP Kanzlei Patentrecht & Urheberrecht 2024” ranking.

Marcus holds degrees from the University of Mannheim (JD equivalent and Ph.D., summa cum laude) and Yale University Law School (LL.M.). He was a member of the German National Academic Foundation (Studienstiftung des Deutschen Volkes), Germany’s elite scholarship foundation.  

Marcus regularly publishes books, treatises and articles that have been cited by the German courts, including the Federal Supreme Court on several occasions. He also publishes in English like the key parts in the chapter on judicial patent proceedings and case management in Germany in the international WIPO guide on patent case management for judges (https://www.wipo.int/patent-judicial-guide/en/full-guide/germany/5.6) or his article on preliminary injunctive relief in the UPC in the first edition of the GRUR-Patent in 2023 (grur-patent-01-23-marcus-grosch-provisional-injunctions-in-the-upc.pdf (quinnemanuel.com).