Firm Profile

Advokatfirmaet Thommessen AS

Global Guide 2025

Ranked departments
Ranked lawyers
Global

Advokatfirmaet Thommessen AS

Advokatfirmaet Thommessen AS

Contact number

+47 2311 1111

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About

Provided by Advokatfirmaet Thommessen AS
Global

Chairman: Baard Bale

Managing Partner: Sverre Tyrhaug

Number of partners: 72

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.

Asset Management

Contact: Marius Holm Rynning

Tel: +47 414 55 657

Email: mhr@thommessen.no

Banking & Financing:

Contact: Ellen Teresa Heyerdahl

Tel: +47 996 47 416

Email: eth@thommessen.no

Compliance & Investigations:

Contact: Hedvig Moe

Tel: +47 404 91 135

Email: hmo@thommessen.no

Construction:

Contact: Jacob F Bull

Tel: +47 480 52 421

Email: jbu@thommessen.no

Data Protection & Cyber Security:

Contact: Christopher Sparre-Enger Clausen

Tel: +47 930 53 854

Email: csc@thommessen.no

Debt Capital Markets:

Contact: Einar Grette

Tel: +47 911 55 284

Email: eig@thommessen.no

Dispute Resolution:

Contact: Kristine Hyldmo Bjørnvik

Tel: +47 994 67 423

Email: khb@thommessen.no

Employment:

Contact: Stein Kimsås-Otterbech

Tel: +47 414 20 515

Email: sto@thommessen.no

Equity Capital Markets:

Contact: Solveig F Bugge

Tel: +47 480 12 199

Email: sbu@thommessen.no

EU/EEA & Competition Law:

Contact: Siri Teigum

Tel: +47 909 12 355

Email: ste@thommessen.no

Finance Regulation:

Contact: Tore Mydske

Tel: +47 916 20 911

Email: tmy@thommessen.no

FinTech:

Contact: Christopher Sparre-Enger Clausen

Tel: +47 930 53 854

Email: csc@thommessen.no

Fishery & Aquaculture:

Contact: Mons Alfred Paulsen

Tel: +47 480 12 142

Email: mpa@thommessen.no

Insolvency & Restructuring:

Contact: Kristoffer Hegdahl

Tel: +47 920 57 178

Email: keg@thommessen.no

Insurance:

Contact: Andreas Meidell

Tel: +47 917 88 344

Email: ame@thommessen.no

Intellectual Property & Marketing Law:

Contact: Camilla Vislie

Tel: +47 992 69 142

Email: cav@thommessen.no

Life Sciences & Health Care:

Contact: Magnus Hauge Greaker

Tel: +47 958 17 168

Email: mag@thommessen.no

M&A:

Contact: Christian Grüner Sagstad

Tel: +47 930 95 240

Email: cgs@thommessen.no

Oil & Gas:

Contact: Christian Hals

Tel: +47 476 21 405

Email: chh@thommessen.no

Oil Service:

Contact: Pål Lieungh

Tel: +47 992 65 577

Email: pli@thommessen.no

Private Equity:

Contact: Christian Grüner Sagstad

Tel: +47 930 95 240

Email: cgs@thommessen.no

PropTech:

Contact: Christopher Sparre-Enger Clausen

Tel: +47 930 53 854

Email: csc@thommessen.no

Public Procurement:

Contact: Wenche Sædal

Tel: +47 454 53 865

Email: wsa@thommessen.no

Real Estate:

Contact: Christopher Borch

Tel: +47 922 57 987

Email: cbo@thommessen.no

Renewable Energy & Infrastructure:

Contact: Bendik Christoffersen

Tel: +47 957 72 936

Email: bch@Thommessen.no

Retail:

Contact: Eivind J Vesterkjær

Tel: +47 909 66 843

Email: eve@thommessen.no

Shipping:

Contact: Mads Haavardsholm

Tel: +47 980 09 765

Email: mha@thommessen.no

Sustainability & Climate Risk:

Contact: Tore Mydske

Tel: +47 916 20 911

Email: tmy@thommessen.no

Tax & Duties:

Contact: Finn Backer-Grøndahl

Tel: +47 934 19 804

Email: fba@thommessen.no

Technology & Digitalisation:

Contact: Espen A Werring

Tel: +47 997 97 676

Email: eaw@thommessen.no

Venture Capital:

Contact: Christian Grüner Sagstad

Tel: +47 930 95 240

Email: cgs@thommessen.no

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

Norway - Head office
Norway
  • Bergen
    Vestre Strømkaien 7 , Bergen, Hordaland, Norway, 5008
    Stavanger
    Knud Holms gate 8 , Stavanger, Rogaland, Norway, NO-4005
UK
  • London
    Level 19C – Tower 42 25 Old Broad Street , London, Greater London, UK, EC2N 1HQ

Contributions

Latest contributions provided by Advokatfirmaet Thommessen AS

Global Practice Guide
Øyvind Mork Karlsen
Jørn Hove
Nicolai Julsvoll
Authored by
Øyvind Mork Karlsen, Jørn Hove, Nicolai Julsvoll
Article • Apr 2025
Global Practice Guide
Ylva B Gjesdahl Petersen
Johan Fredrik Brende
Marius Holm Rynning
Authored by
Ylva B Gjesdahl Petersen, Johan Fredrik Brende, Marius Holm Rynning
Article • Apr 2025
Global Practice Guide
Magnus Hauge Greaker
Julie Rasmussen Solli
Camilla Vislie
Amalie Hauge Pedersen
Authored by
Magnus Hauge Greaker, Julie Rasmussen Solli, Camilla Vislie, Amalie Hauge Pedersen
Article • Jan 2025

All contributions provided by Advokatfirmaet Thommessen AS

Sort by - Most recent
Title and authorsContent typePublication dateMedia type
Trade Marks & Copyright 2025 | Norway | Law and Practice
Authored by: Amalie Hauge Pedersen, Julie Rasmussen Solli, Camilla Vislie, Magnus Hauge Greaker
Global Practice Guide Jan 2025 Article
Life Sciences & Pharma IP Litigation 2025 | Norway | Trends and Developments
Authored by: Magnus Hauge Greaker, Camilla Vislie, Nora Solberg Bjørnnes, Martin Guldbrandt Hansen
Global Practice Guide Dec 2024 Article
Technology & Outsourcing 2024 | Norway | Trends and Developments
Authored by: Christopher Sparre-Enger Clausen, Jostein Opdahl Jenssen, Espen A Werring, Kjetil Rikardsen
Global Practice Guide Oct 2024 Article
Technology & Outsourcing 2024 | Norway | Law and Practice
Authored by: Christopher Sparre-Enger Clausen, Espen A Werring, Jostein Opdahl Jenssen, Kjetil Rikardsen
Global Practice Guide Oct 2024 Article
Shareholders' Rights & Shareholder Activism 2024 | Norway | Trends and Developments
Authored by: John Olve Johnsen, Lars Eirik Gåseide Røsås, Ylva B. Gjesdahl Petersen
Global Practice Guide Sep 2024 Article
Shareholders' Rights & Shareholder Activism 2024 | Norway | Law and Practice
Authored by: John Olve Johnsen, Lars Eirik Gåseide Røsås, Ylva B. Gjesdahl Petersen
Global Practice Guide Sep 2024 Article

Advokatfirmaet Thommessen AS rankings

Global Guide 2025
Filter by
Band
Norway
Banking & Finance
1 Department
2 Ranked Lawyers
Department
Banking & Finance
1
Banking & Finance
1
Band 1
Lawyers
Hans Haugstad
1
Hans Haugstad
1
Band 1
Ellen Teresa Heyerdahl
2
Ellen Teresa Heyerdahl
Head of Banking & Finance
2
Band 2
Capital Markets: Debt
1 Department
3 Ranked Lawyers
Department
Capital Markets: Debt
1
Capital Markets: Debt
1
Band 1
Lawyers
Einar Grette
1
Einar Grette
1
Band 1
Halvor Mansåker
2
Halvor Mansåker
2
Band 2
Frida Stene-Slotte
U
Frida Stene-Slotte
U
Up and Coming
Capital Markets: Equity
1 Department
5 Ranked Lawyers
Department
Capital Markets: Equity
1
Capital Markets: Equity
1
Band 1
Lawyers
Anders Arnkværn
1
Anders Arnkværn
1
Band 1
Hans Cappelen Arnesen
1
Hans Cappelen Arnesen
1
Band 1
Solveig Fagerheim Bugge
3
Solveig Fagerheim Bugge
3
Band 3
Ylva B. Gjesdahl Petersen
4
Ylva B. Gjesdahl Petersen
4
Band 4
Lars Eirik Gåseide Røsås
Lars Eirik Gåseide Røsås
UK expertise based abroad
Corporate/M&A
1 Department
4 Ranked Lawyers
Department
Corporate/M&A
1
Corporate/M&A
1
Band 1
Lawyers
Anders Arnkværn
1
Anders Arnkværn
1
Band 1
Hans Cappelen Arnesen
1
Hans Cappelen Arnesen
1
Band 1
Christian Grüner Sagstad
4
Christian Grüner Sagstad
Head of Corporate/M&A
4
Band 4
Lars Eirik Gåseide Røsås
Lars Eirik Gåseide Røsås
UK expertise based abroad
Dispute Resolution
1 Department
3 Ranked Lawyers
Department
Dispute Resolution
2
Dispute Resolution
2
Band 2
Lawyers
Henning Harborg
1
Henning Harborg
1
Band 1
20 of 32 results