Legal excellence at eye level.
The legal dispute is not reinvented in the third instance, especially since new factual arguments are generally excluded. However, with their experience, Siegmann Höger understands how to structure, prepare, and, if necessary, re-evaluate the procedural material accumulated in two instances, even in large cases, in such a way that the legal dispute can be won before the Federal Court of Justice or, at least, the course is set correctly in the event of a referral of the case back to the Court of Appeal. We argue clearly, confidently, and at the highest legal standards. We place particular emphasis on collegial and respectful cooperation with our colleagues in the lower courts in order to understand the interests underlying our clients’ legal disputes and thus be able to represent them in the best possible way in the appeals court. This approach pays off. In the renowned Juve rankings, Matthias Siegmann’s sole practice has been among the top firms at the Federal Court of Justice for many years.
Highlights of the last few years.
As attorneys at the Federal Court of Justice, Siegmann Höger applies its expertise in appeals law, in accordance with the legislature’s mandate, in almost all areas of civil law. Below you will find a selection of cases from recent years in which we have successfully represented our clients’ interests at the Federal Court of Justice.
Other cases in which we have successfully acted for our clients:
What others say about us.
“Fast, creative, high professional quality. Very good rhetorician.” (Juve-Rechtsmarkt 4/2024, p. 63)
"Combative, collegial, friendly - always an open ear, even for the wishes of the court representatives."
(Juve-Rechtsmarkt 12/2022, p. 85)
(Juve-Rechtsmarkt 12/2022, p. 85)
“Extremely precise pleadings.”
(Juve-Rechtsmarkt 12/2020, p. 91)
(Juve-Rechtsmarkt 12/2020, p. 91)
“Extremely dedicated and detailed,
excellently drafted pleadings”
(Juve Handbook 2018/2019, p. 642)
excellently drafted pleadings”
(Juve Handbook 2018/2019, p. 642)
“A critical spirit among the ranks of the BGH lawyers” (Süddeutsche Zeitung, 27.9.2013, p. 1)
Proven cooperation in a new form: The law firm Siegmann Höger Rechtsanwälte beim Bundesgerichtshof Partnerschaft mbB, which has been operating since July 1, 2025, seamlessly continues the sole practice established at the Federal Court of Justice in 2007.
Siegmann Höger’s practice focuses on banking and investment law, corporate law and inheritance law, liability law for the liberal professions, insolvency law, and antitrust law. We also regularly practice in arbitration law and private international law. We also represent our clients in all other areas of expertise before the Federal Court of Justice, such as construction law, tenancy law, press law, and intellectual property law. The firm also has particular expertise in handling mass litigation, whether it be comprehensive proceedings under the Capital Investor Model Proceedings Act, class actions in antitrust damages law, or mass individual proceedings (the Wirecard case, the Diesel case, and online gambling cases). We also provide legal advice to the appellate courts in major civil litigation.
The lawyers
Prof. Dr. Matthias Siegmann
Lawyer at the Federal Court of Justice
In addition to his many years of successful work as a lawyer at the Federal Court of Justice, Matthias Siegmann is also an arbitrator (mostly appointed by the party) and teaches as an honorary professor at the University of Heidelberg.
Dr. Jochen Höger
Lawyer at the Federal Court of Justice
Jochen Höger has been admitted to the bar at the Federal Court of Justice since 2025 and previously worked as an independent lawyer nationwide in the courts, but also in the appeal court.
Facts and figures about our firm
Matthias Siegmann and Jochen Höger have been working closely together for over 20 years. Since Matthias Siegmann was admitted to the bar before the Federal Court of Justice in 2007, he has handled more than 10,000 cases. The experience he has gained from this work pays off for his clients. Of the 332 leave to appeal granted so far (as of August 31, 2025), according to the Federal Court of Justice’s statistics, Matthias Siegmann has obtained 79 leave to appeal for his clients (as of August 31, 2025) (still acting as a sole practitioner).
Years of collaboration
0
+
supervised procedures
0
.000+
of 332 revision approvals achieved in 2025
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Working together towards success, collegially, clearly and goal-oriented.
Just as Matthias Siegmann and Jochen Höger work together in a spirit of trust, they also place particular emphasis on close collaboration with the attorneys working for them in the firm, each of whom is exceptionally qualified and specializes in specific areas of practice, and who help draft the pleadings for the Federal Court of Justice. Furthermore, Matthias Siegmann and Jochen Höger often handle commercially significant cases jointly, using the dual control principle. Joint exchanges with colleagues in the lower courts are important to Siegmann Höger, whose presentations and procedural conduct are an indispensable foundation for success in the appeals court. Early coordination of the proceedings before the Federal Court of Justice with colleagues at the lower courts is a matter of course for us and serves the common goal of defending and enforcing our clients’ interests in the third instance.