Thales Mertens


Thales is head of our Belgian Litigation & Contracts practice. He specialises in restructuring and insolvency-related matters (both contentious and non-contentious) and post-closing litigation, both local and international, in addition to more general contract-related advice.
He can draw on nearly 20 years of experience in advising both banks and corporate multinationals on complex reorganisations, restructurings and insolvency proceedings. He has also acted in a broad range of complex post-M&A, real estate and commercial disputes (both in court and in arbitration). In addition to this contentious experience, Thales advises both suppliers and customers on a wide variety of commercial contracts involving many different jurisdictions and sector.


Representative matters

A multinational commodity trading company in a highly publicised multijurisdictional restructuring of a major player in the zinc production and mining industry.
A consortium of lenders on the restructuring of a major Belgian fashion group in one of the most publicised restructurings since the outbreak of the Covid-19 pandemic.
A Belgian software company on a post-M&A dispute with one of its former shareholders relating to the conditions of the transfer of his shares.
The shareholders of a large super market chain on the sale of their participation, and ensuing corporate litigation (including arbitration) initiated by a minority shareholder, who seeks to prevent the sale of its participation to a third party.

Published Work

  • B. DE BOCK, T. MERTENS, “Introduction of a pre-pack insolvency procedure in Belgium”, HERO - Herstructurering & Recovery Online, 12 April 2021.
Thales Mertens knows the law very well, but he is also very pragmatic with his no-nonsense approach.
Chambers, 2024
He is a very good strategist and tactician, very much a common-sense type of thinker.
Chambers, 2024



Member of the Brussels bar, 2004


Degree, Law, Katholieke Universiteit Leuven (KUL), 2003

LLM, Cornell University, 2004


Dutch, English, French
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.