Pierre-Olivier Mahieu

Pierre-Olivier Mahieu focuses his practice on mergers and acquisitions, private equity, and equity capital market transactions. He advises local and international clients on inbound and outbound transactions and has more than 25 years of experience in Belgian, European, and other cross-border transactions. He is regularly praised by top legal directories such as Chambers, "he has the charisma to excel in difficult situations with highly demanding counterparts," and The Legal 500, a "prolific senior dealmaker."

Pierre-Olivier has represented clients in various sectors, including the life sciences, aerospace, technology, energy, private equity, and banking and insurance industries. Prior to joining Jones Day in 2025, he worked with the European Payments Initiative (EPI), an initiative of 16 European banks and payments institution, on their acquisition of the leading Dutch payment scheme Currence iDEAL and the Luxembourg-based payment solution provider Payconiq International, from their current shareholders. He also represented Athora Belgium, the Belgian life insurer focused on pension and investment savings, on the acquisition of a life insurance portfolio, with €3.3 billion of assets under management, from NN Insurance; Alcopa Coordination Center on the sale of their motorcycle parts distributor Bihr to U.S.-based Arrowhead Engineered Products; Mithra Pharmaceuticals SA, a Belgian-listed health care company, on the distressed €175 million sale of its main assets to Gedeon Richter under pre-pack bankruptcy proceedings; and Louis Delhaize Group, a French-Belgian retailer, on the sale of the majority of its Match/Smatch stores to Colruyt, on the sale of its Delitraiteur activities to Colruyt, and on the sale of its Louis Delhaize convenience stores operated by Delfood SA to Ahold Delhaize/Delhaize Le Lion.