G. Bosseler, « Déséquilibre contractuel et clauses de bad leaver dans les opérations de private equity. Réflexions autour des droits français, belge et luxembourgeois » (“Contractual Imbalance and Bad Leaver Clauses in Private Equity Transactions: Reflections on French, Belgian and Luxembourg Law”), ACE, 2025/10, pp. 2-20.
Me Guillaume Bosseler
Junior Associate
Avocat
“There are times when one is condemned to ignorance because of a lack of books; there are others when it is difficult to educate oneself because there are too many.”
(J.-E.-M. Portalis, Preliminary Address to the First Draft of the Civil Code, 1801)
In an age of artificial intelligence and (almost) unlimited access to vast amounts of information, this quote highlights the ongoing importance of lawyers and legal scholars and remains more relevant than ever.
Bar admission
Luxembourg, 20 juin 2019
Languages
French / English
Expertises
Banking & Finance
Regulatory, Transactions
Corporate, Commercial & M&A
Commercial Advisory
Dispute Resolution
Banking & Finance Litigation, Corporate Litigation & Shareholders' Disputes, Enforcement, General commercial & civil litigation
Private Clients
Education
PhD in law / legal studies, Uni.Lu - UCLouvain, Luxembourg - Belgium (joint supervision), 2020-2025
Supplementary courses in Luxembourg law (CCDL), Luxembourg, 2018-2019
Supplementary diploma in management (DCG), ICHEC (Brussels Management School), Belgium, 2017-2018
Master’s degree in law (specialising in business law), UCLouvain, Belgium, 2012-2017
Selected Experience
After completing a doctoral thesis at the University of Luxembourg and the Catholic University of Louvain (in joint supervision), I joined the law firm Brucher Thieltgen & Partners in April 2025.
Working within the Banking and Finance department, I apply the knowledge I gained while preparing my thesis on a daily basis to provide thorough services to our clients.
I assist our clients with advisory and pre-litigation matters, as well as with litigation before the Luxembourg courts.
Publications and Editorial Responsibilities
G. Bosseler, « Déséquilibre contractuel et clauses de bad leaver dans les opérations de private equity. Réflexions autour des droits français, belge et luxembourgeois » (“Contractual Imbalance and Bad Leaver Clauses in Private Equity Transactions: Reflections on French, Belgian and Luxembourg Law”), D.A.O.R., 2025/3, pp. 14-32.
G. Bosseler, Des déséquilibres excessifs dans les relations entre associés dans le cadre d’opérations de private equity. Quels enseignements tirer des droits belge et français pour le droit luxembourgeois ? (“Excessive Imbalances in Shareholders’ Relations in the Context of Private Equity Transactions: What Lessons Can Be Learned from Belgian and French Law for Luxembourg Law?”), PhD thesis, University of Luxembourg and UCLouvain, 2025.
G. Bosseler, « Aspects patrimoniaux du nouveau droit luxembourgeois des ASBL » (“Patrimonial Aspects of the New Luxembourg Law on Non-Profit Organisations”), in D. Hiez (ed.), Le nouveau droit des ASBL au Luxembourg (“The New Law on Non-Profit Organisations in Luxembourg”), Brussels, Larcier, 2024, pp. 213-249.
Conferences and Educational Engagements
Tutorials in general Luxembourg commercial law, University of Luxembourg, academic years 2020-2021, 2021-2022 and 2022-2023.
Tutorials in legal methodology, University of Luxembourg, 2021.