Aquaculture and Fisheries
1 Ranked Lawyer
Firm PROFILE
Advokatfirmaet Thommessen AS
Europe 2026
Rankings
Leading firm in Europe 2026
Ranked Departments
Ranked Departments
Ranked Individuals
Ranked Individuals
Top figures
4
Offices
439
Company Size
1856
Established Year
Content provided by Advokatfirmaet Thommessen AS
Contributions and articles
6 Global Practice Guides
1 In-depth overview
Overview
Provided by Advokatfirmaet Thommessen AS
Established in 1856, Thommessen is considered to be one of Norway’s leading commercial law firms. The firm has offices in Oslo, Bergen, Stavanger and London. The firm provides advice to Norwegian and international companies as well as organisations in the public and private sectors, ranging from SMEs to large multi-national corporations. Thommessen covers all business related fields of law.
Work & experience
Provided by Advokatfirmaet Thommessen AS
Thommessen assists businesses with transactions, complex projects and contentious matters in all areas of commercial law. Their robust professional legal expertise is combined with in-depth industry knowledge, and their lawyers stay abreast of trends and developments on an ongoing basis in order to provide advice which facilitates long-term value creation.
Ranked Offices at Advokatfirmaet Thommessen AS
Provided by Advokatfirmaet Thommessen AS
Ranked Departments at Advokatfirmaet Thommessen AS (19)
Ranked Individuals at Advokatfirmaet Thommessen AS (55)
Norway
Mons Alfred Paulsen
Aquaculture and Fisheries
View profile 
Ellen Teresa Heyerdahl
Banking & Finance
View profile 
Hans Haugstad
Banking & Finance
View profile 
Hedda Leikvang
Banking & Finance
View profile 
Tore Mydske
Banking & Finance: Regulatory
View profile 
Einar Grette
Capital Markets: Debt
View profile 
Frida Stene-Slotte
Capital Markets: Debt
View profile 
Anders Arnkværn
Capital Markets: Equity
View profile 
Hans Cappelen Arnesen
Capital Markets: Equity
View profile 
Solveig Fagerheim Bugge
Capital Markets: Equity
View profile 
Ylva B. Gjesdahl Petersen
Capital Markets: Equity
View profile 
Siri Teigum
Competition/Antitrust
View profile 
Eivind Vesterkjær
Competition/Antitrust
View profile 
Svein Terje Tveit
Competition/Antitrust
View profile Svein Terje Tveit
Competition/Antitrust: Public Procurement
View profile 
Wenche Sædal
Competition/Antitrust: Public Procurement
View profile 
Jacob F Bull
Construction
View profile 
Kristine Hyldmo Bjørnvik
Construction
View profile Anders Arnkværn
Corporate/M&A
View profile Hans Cappelen Arnesen
Corporate/M&A
View profile 
Christian Grüner Sagstad
Head of Corporate/M&A
View profile 
Christopher Sparre-Enger Clausen
Data Protection
View profile 
Henning Harborg
Dispute Resolution
View profile 
Stig Berge
Dispute Resolution
View profile 
Nanette Arvesen
Dispute Resolution
View profile
All Contributions (7)
Provided by Advokatfirmaet Thommessen AS
Global Practice Guide
Patent Litigation 2026 | Norway | Trends and Developments
Authored by: Camilla Vislie, Magnus Hauge Greaker, Martin Guldbrandt Hansen, Andreas Stabell
Article
Jan 2026
Global Practice Guide
Patent Litigation 2026 | Norway | Law and Practice
Authored by: Camilla Vislie, Magnus Hauge Greaker, Martin Guldbrandt Hansen, Andreas Stabell
Article
Jan 2026
Global Practice Guide
International Trade 2026 | Norway | Trends and Developments
Authored by: Axel Johnsen Holm, Bjørn Christian Lilletvedt Tovsen, Caroline Svelland Hauge
Article
Dec 2025
Global Practice Guide
International Trade 2026 | Norway | Law and Practice
Authored by: Axel Johnsen Holm, Bjørn Christian Lilletvedt Tovsen, Caroline Svelland Hauge, Hedvig Moe
Article
Dec 2025
Global Practice Guide
International Arbitration 2025 | Norway | Trends and Developments
Authored by: Henrik Møinichen, Kristine Hyldmo Bjørnvik, Andreas Meidell, Nanette Arvesen
Article
Jul 2025
Global Practice Guide
International Arbitration 2025 | Norway | Law and Practice
Authored by: Trond Hatland, Henrik Fabian Torgrimsby, Anders Eide Røyneberg, Per Ole Svor
Article
Jul 2025
Top figures
4
Offices
439
Company Size
1856
Established Year
Content provided by Advokatfirmaet Thommessen AS
What success is built on
Chambers is the leading data and intelligence partner for the legal sector.