About Onno

Onno Hennis has been a lawyer since 2009 and joined the AMS Advocaten team in 2015. Onno studied law (with honours) and European Studies at the University of Amsterdam and the Humboldt University in Berlin. Following his studies, Onno worked at De Brauw Blackstone Westbroek, where he successively dealt with mergers and acquisitions, and general procedural law.

SPECIALISATIONS

At AMS Advocaten, Onno focuses on advising and litigating in commercial and corporate disputes. He deals with issues that arise within companies (such as impasses in general meetings of shareholders and directors’ and officers’ liability), as well as disputes between companies and external parties (such as former trading and investment partners, suppliers and customers).

Onno successfully completed the specialization course in Company Law and Business Law at the Grotius Academy. This is the most comprehensive and complete postgraduate training in corporate law.

LECTURER AT THE UNIVERSITY OF AMSTERDAM

Onno is a lecturer at the University of Amsterdam, where he lectures and guides students in their participation in international advocacy competitions. He gives lectures for the master’s course “International Commercial Arbitration’ and assesses bachelor’s essays and master’s theses.

GERMAN DESK

Onno speaks fluent English and German. Thanks to his experience – including at Allen&Overy in Frankfurt am Main – he is in an excellent position to advise clients who have activities in Germany. Onno is responsible for the German Desk of AMS Advocaten.

EXPERT AT BUSINESSINSIDER.NL AND BNR

In addition to his daily law practice, Onno is also an expert attached to the Dutch business news website BusinessInsider.nl. In the radio programme BNR Juridische zaken, Onno regularly presents his views on current legal themes.

Recent blogs

All blogs
Corporate law in The Netherlands January 9, 2026 7 min

Wingtech announces USD 8 Billion damages claim against the Netherlands in Nexperia-dispute

A recent article in the South China Morning Post (SCMP) reports that the (indirect) shareholders of Nexperia are planning to initiate arbitration proceedings against the Dutch State following the intervention by Dutch Minister Karremans and the Enterprise Chamber of the Amsterdam Court of Appeal. In this blog, Onno Hennis outlines what is currently known on […]

Corporate law in The Netherlands January 9, 2026 4 min

Nexperia: Dutch court upholds suspension of Wing’s alleged “proxy”

Shortly before Christmas, a Dutch district court rendered a decision directly related to the ongoing crisis at Nexperia. In summary proceedings, a Chinese employee sought reinstatement after having been placed on garden leave. He argued that the measure amounted to unlawful discrimination on the basis of race. Nexperia, by contrast, maintained that the employee acted […]

Corporate law in The Netherlands October 16, 2025 5 min

Nexperia: court intervention by the Dutch Enterprise Chamber in Amsterdam explained

Last week the Enterprise Chamber intervened forcefully at chip maker Nexperia. The case is unique: it is the first time that the Dutch Minister of Economic Affairs issued an order based on a 1952 law, and the first time that the Enterprise Chamber granted immediate relief without a prior hearing. Background Nexperia is a Dutch […]

Practice areas register

Onno has registered as principal areas of law in the register of legal areas of the Netherlands Bar: civil procedural law and corporate law. On the basis of this registration, he is obliged to obtain ten training credits per calendar year in each registered principal legal area in accordance with the standards of the Dutch Bar Association.