Mathilde Ostertag

Practice Areas

Mathilde Ostertag is a partner and heads the tax practice at GSK Stockmann in Luxembourg. Her areas of expertise include domestic and international tax law, in particular tax planning, private equity (venture capital), real estate, debt and other foreign investment structures. She also has in-depth knowledge on capital market and securitisation transactions, cross-border restructurings, inter alia, inbound and outbound migrations, mergers and acquisitions and debt restructuring. Mathilde holds a Master’s degree from the Université Robert Schuman, Strasbourg and a postgraduate degree in Corporate and Tax Law (DJCE). She is President of the Ladies in Law Luxembourg Association (“LILLA”), which aims at actively promoting gender diversity and women in senior positions in the legal sector. She is also a member of the International Fiscal Association (“IFA”) and the International Bar Association (“IBA”), and publishes regularly. Mathilde is fluent in French, English, German and Portuguese.

Professional Memberships

Young International Fiscal Association (Young IFA)

International Fiscal Association (IFA)

International Bar Association (IBA)

President of the Ladies in Law Luxembourg Association (LILLA)

Publications

Ostertag, M. and Schiffmann, K. (2021) Luxembourg. The International Comparative Legal Guide to Corporate Tax 2022, 18th ed. London: Global Legal Group, Chapter 13, pp. 106-116.

Ostertag, M., Schiffmann, K. and Kleinschmidt, A. (2021). Luxembourg: Tax. The Legal 500 Comparative Legal Guide, 6th ed. London: Legalease.