People/Thomas Halvorsen
Office
Zurich
Admitted
1999
Languages
EN · DE · NO
Partner

Thomas Halvorsen

Thomas advises on matters in international tax, working from the firm’s Zurich office. Thomas joined the partnership in 2005 and frequently leads cross-border teams alongside colleagues in our London, New York and Paris offices.

Recent work includes counsel to sovereign, institutional and corporate clients on matters that, by their nature, are not discussed publicly. References available on request to qualified enquirers.

Selected Matters
2025
Advised a European industrial group on its €18.4bn acquisition of a North American competitor.
2025
Counsel to a G20 sovereign on the restructuring of US$46bn external debt.
2025
Advised the joint bookrunners on the €6.2bn dual-tranche issuance by a supranational.
2024
Represented a Gulf state in a US$4.3bn ICSID claim. Award rendered in favour of the respondent.