Overview
Guillaume Kellner focuses his practice on mergers and acquisitions, private equity, and securities law. He advises investment funds as well as strategic clients on their acquisition, leverage buyouts, and build-up transactions as well as their reorganization both in France and internationally.
Results
- Advised EQT and Colisée on the acquisition of the SGMR group
- Advised Colisée on the sale of 33 properties to Primonial
- Advised one of the Big Four on a carved-out transaction and the sale of a branch of activity
- Advised Eurazeo on the sale of In Tech Medical to Montagu PE
- Advised Hanwha Solutions Corporation on the acquisition of RES Méditerranée (EUR 720 million)
- Advised Figeac Aero on the entry into market of ACE Capital Partners and related negotiations with its creditors
- Advised Vivalto Vie and Colisée on the acquisition of 32 facilities owned by the Korian group
- Advised the selling shareholders of the Odyssenior group
- Advised Antin Infrastructure Partners on the sale of Inicea to Korian*
- Advised EQT on a co-investment agreement relating to Colisee entered into with Caisse de dépôt et placement du Québec (CDPQ)*
- Advised EQT on the acquisition of Colisée from IK Investment Partners*
- Advised the shareholders of an airline company in the context of its financial difficulties (post-COVID-19)*
- Advised Mérieux Equity Partners on the LBO on CTRS*
- Advised Mayriver Capital and Dickson Inc. on the tender offer on Oceasoft*
- Advised Esmo Corporation on connection with its investment in Navya*
- Advised Antin Infrastructure Partners on the acquisition of the Almaviva Group*
- Advised Ausy and its key shareholders on the cash tender offer initiated by Randstad*
- Advised Colisée Group on the acquisition of the GDP Vendôme group and Bien à la Maison*
- Advised Eurazeo on the Fonroche Group spin-off and the subsequent sale of a 50% stake to Infravia*
- Advised Eurazeo on the takeover of In Tech Medical Group*
- Advised Atos Group on the acquisition of Anthelio Healthcare Solutions Group*
- Advised Antin Infrastructure Partners on the acquisition of the Inicea group*
- Advised Ausy Group on the acquisition of Celerity Inc. and various other acquisitions*
- Advised Crédit Agricole, Unigrains, and SGCP on their equity investment in Compagnie Fruitière*
- Advised Aqualande Group on a joint venture with Labeyrie*
- Advised Crédit Agricole and Unigrains on their equity investment in Agrial*
- Advised Eurazeo on its equity investment in Neovia (formerly In Vivo NSA)*
- Advised Bull on the cash tender offer initiated by Atos*
- Advised UCA on the sale of its 28 hypermarkets to E. Leclerc*
- Advised UCA on the sale of its 140 stores to Carrefour*
- Advised Qualcomm on its joint venture with Alcatel and the subsequent acquisition of shares in Alcatel*
*Matter handled prior to joining McDermott
Recognitions
- The Best Lawyers in France, M&A and Private Equity, 2014-2025
- Chambers Europe, France: Corporate M&A, 2022-2024
- The Legal 500 EMEA, Recommended, 2022-2024
- IFLR1000, Private Equity and M&A, 2022-2023
Credentials
Education
Universite De Strasbourg, DESS-DJCE, 1995
Universite De Strasbourg, Masters, 1993
Admissions
Paris
Languages
English
French