Advokatfirmaet Thommessen AS

Firm Profile

Rankings

Global

Awarded leading firm in Global 2026

Chambers and Partners

Ranked Departments:

Chambers and Partners

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Overview

Provided by Advokatfirmaet Thommessen AS

Chairman: Baard Bale

Managing Partner: Sverre Tyrhaug

Number of partners: 75

Number of other lawyers: Approx. 245

Languages: Norwegian, English, Swedish, Danish, German, French, Dutch

Firm Overview:

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.

Main Areas of Practice:

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.

Administrative Sanctions and Criminal Liability

Asset Management

Banking & Financing

Compliance

Construction

Consumer Markets

Crisis Management

Data Centres

Data Protection & Cyber Security

Debt Capital Markets

Defence and Security

Dispute Resolution

Employment

Equity Capital Markets

EU/EEA & Competition Law

Finance Regulation

FinTech

Fishery & Aquaculture

Games, Arts, Music, Entertainment and Sports

Insolvency & Restructuring

Insurance

Intellectual Property & Marketing Law

International Trade and Customs

Life Sciences & Health Care

M&A and Corporate Law

Maritime and Offshore Emergency Respons

Oil & Gas

Oil Service

Pensions

Private Equity

Private Wealth, Inheritance and Family Law

PropTech

Public Procurement

Real Estate

Renewable Energy & Infrastructure

Sanctions and Export Control

Shipping and Offshore

Sustainability & Climate Risk

Tax & Duties

Tech M&A

Technology & Digitalisation

The Norwegian Security Act

Transfer Pricing

Venture Capital and Growth Equity

International Work:

Thommessen represent non-Norwegian businesses in Norway, as well as Norwegian businesses internationally. Thommessen has a London office, supplemented by an extensive international network. Thommessen’s team members have comprehensive international experience, and their lawyers have argued numerous cases before international courts and tribunals. Thommessen is also the Norwegian member of Lex Mundi.

Innovation:

Top-of-class project management is a hallmark of the Thommessen approach, and both the firm and their clients experience considerable time savings and improved communication flows in projects where Thommessen’s digital project management solutions are used. Thommessen use a leading tool for interaction and collaboration on their projects and have developed proprietary project management tools. With their own internal digitalisation department at the firm, Thommessen have a short route from idea to product. Teamwork and new forms of collaboration have helped Thommessen establish an innovation culture which they believe has put them on the path towards creating the law firm of the future.

Ranked Offices

Provided by Advokatfirmaet Thommessen AS

Address (A-Z)

Norway - Head office

Oslo

Ruseløkkveien 38 , Oslo, Oslo, Norway, 0251, Oslo

www.thommessen.no

+47 2311 1111

Norway

Hordaland

Vestre Strømkaien 7 , Bergen, Hordaland, Norway, 5008, Bergen


Rogaland

Knud Holms gate 8 , Stavanger, Rogaland, Norway, NO-4005, Stavanger

UK

Greater London

Level 19C – Tower 42 25 Old Broad Street , London, Greater London, UK, EC2N 1HQ, London

Chambers Laurel

Ranked Departments

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Chambers Laurel

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Contributions

Latest contributions provided by Advokatfirmaet Thommessen AS

Global Practice Guide
Camilla Vislie
Magnus Hauge Greaker
Martin Guldbrandt Hansen
Andreas Stabell
Authored by
Camilla Vislie, Magnus Hauge Greaker, Martin Guldbrandt Hansen, Andreas Stabell
Article • Jan 2026
Global Practice Guide
Camilla Vislie
Magnus Hauge Greaker
Martin Guldbrandt Hansen
Andreas Stabell
Authored by
Camilla Vislie, Magnus Hauge Greaker, Martin Guldbrandt Hansen, Andreas Stabell
Article • Jan 2026
Global Practice Guide
Axel Johnsen Holm
Bjørn Christian Lilletvedt Tovsen
Caroline Svelland Hauge
Authored by
Axel Johnsen Holm, Bjørn Christian Lilletvedt Tovsen, Caroline Svelland Hauge
Article • Dec 2025

All contributions provided by Advokatfirmaet Thommessen AS

Sort by - Most recent
Title and authorsContent typePublication dateMedia type
International Trade 2026 | Norway | Law and Practice
Authored by: Axel Johnsen Holm, Bjørn Christian Lilletvedt Tovsen, Caroline Svelland Hauge, Hedvig Moe
Global Practice Guide Dec 2025 Article
International Arbitration 2025 | Norway | Trends and Developments
Authored by: Henrik Møinichen, Kristine Hyldmo Bjørnvik, Andreas Meidell, Nanette Arvesen
Global Practice Guide Jul 2025 Article
International Arbitration 2025 | Norway | Law and Practice
Authored by: Trond Hatland, Henrik Fabian Torgrimsby, Anders Eide Røyneberg, Per Ole Svor
Global Practice Guide Jul 2025 Article
Construction Law 2025 | Norway | Law and Practice
Authored by: Pernille Bergan Yang, Jacob F Bull, Henrik Møinichen
Global Practice Guide May 2025 Article
Venture Capital 2025 | Norway | Trends and Developments
Authored by: Øyvind Mork Karlsen, Jørn Hove, Nicolai Julsvoll
Global Practice Guide Apr 2025 Article
Venture Capital 2025 | Norway | Law and Practice
Authored by: Ylva B Gjesdahl Petersen, Johan Fredrik Brende, Marius Holm Rynning
Global Practice Guide Apr 2025 Article

Advokatfirmaet Thommessen AS