Margret Schellberg

Dr. Martin Jäger is Counsel at Hausfeld in Düsseldorf. He advises on all aspects of German and European antitrust law with a focus on antitrust litigation and merger control. Furthermore, he has many years of diverse experience in distribution antitrust law, in particular at the interface with intellectual property law and in antitrust damages proceedings, as well as in advising clients from the healthcare industry. Prior to joining Hausfeld, Martin was Senior Counsel at a leading G...

Sebastian von Lossow LL.M. is a lawyer and partner at Friedrich Graf von Westphalen & Partner. He has been working in the corporate law and M&A practice of Friedrich Graf von Westphalen’s Dusseldorf office since 2025. Sebastian von Lossow is a specialist in M&A, joint ventures and real estate transactions. His clients include entrepreneurs, family offices and mid-size companies (industrials, engineering as well as software-as-a-service) and real estate managers and investors...

Christian Bärenz is a lawyer recognized by Best Lawyers in the practice area of Restructuring and Insolvency Law. Christian practices law in Cologne, Germany Best Lawyers has recognized Christian Bärenz since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Christian Bärenz is held by other lawyers.

Jens Kleinert practises as a lawyer and a certified tax lawyer, advising clients on all issues dealing with national and international tax law, in particular on the development of tax-optimised structures and the implementation thereof. This also comprises the development and application of capital market products, especially by using investment funds. He has broad experience in advising on complex restructurings and cross-border transactions. His focus is particularly on business succession ...

Claudia Maaßen LL.M. is a lawyer and partner at Friedrich Graf von Westphalen & Partner. She has been working in the litigation and arbitration practice group of Friedrich Graf von Westphalen’s Cologne office since 2016. Claudia Maaßen is a specialist in dispute resolution with a focus on manager liability and D&O and product liability. Her clients include insurance companies, managers and private companies. Claudia Maaßen speaks German, French and English.

Lawyer Partner

Born in 1934 Legal studies at the Universities of Marburg, Münster and Berlin First Exam ("1. Staatsexamen") in 1957 Doctor of both Laws (Dr. jur. ut.) 1960 Legal clerkship ("Referendariat") in at the Detmold and Berlin District Courts Second (Bar) Exam ("2. Staatsexamen") in 1962 First bar admission in 1962 Managing director of an industrial company, 1964 - 1973 Renewed bar admission in 1973 Certified Specialized Attorney in Tax Law since 1973

Katja Schramm is a lawyer recognized by Best Lawyers in the practice areas of Energy Law, Environmental Law and Regulatory Practice. Katja practices law in Düsseldorf, Germany Best Lawyers has recognized Katja Schramm since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Katja Schramm is held by other lawyers.

Christoph Janssen is a lawyer recognized by Best Lawyers in the practice area of Restructuring and Insolvency Law. Christoph practices law in Cologne, Germany Best Lawyers has recognized Christoph Janssen since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Christoph Janssen is held by other lawyers.

Christian Bürger is a lawyer recognized by Best Lawyers in the practice area of Competition / Antitrust Law. Christian practices law in Cologne, Germany Best Lawyers has recognized Christian Bürger since 2021. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Christian Bürger is held by other lawyers.