ABOUT US
Thommessen
Thommessen is one of Norway’s leading commercial law firms. Since our inception in 1856, we have been involved in most of the landmark cases in Norwegian business. Our clients are Norwegian and international companies, in both the private and public sectors. It is important to us to be able to offer our clients top-quality legal advice across all practice areas. We regularly receive confirmation of our high professional standards from both Norwegian and international rating agencies.

“In addition to being one of the leading law firms in Norway with a strong legal team, Thommessen also provides a service that is compassionate and understanding to our needs. It really cares about its clients and our success.”
Client quote – Chambers Global 2025
The preferred choice when trust matters.







Advokatfirmaet Thommessen AS
Oslo
Ruseløkkveien 38 0251 Oslo PO Box 1484 Vika NO-0116 Oslo
Bergen
Vestre Strømkaien 7 5008 Bergen PO Box 43 Nygårdstangen NO-5838 Bergen
Stavanger
Knud Holms gate 8 NO-4005 Stavanger
London
Level 19C – Tower 42 25 Old Broad Street 65 St Paul’s Churchyard GB-London EC2N 1HQ
