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Thommessen

Thommessen is a commercial law firm with offices in Oslo, Bergen, Stavanger and London.

Law Practice
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Headquarters
Oslo, NorwaySource: RevenueBaseRetrieved October 13, 2026
Employee range
201 to 500Source: RevenueBaseRetrieved October 13, 2026
Founded
1856Source: RevenueBaseRetrieved October 13, 2026
Published list appearances
16 supported appearances ↗Source: RevenueBase lists
The company at a glance

What does Thommessen do?

Founded in 1856, the firm has been involved in many defining developments in Norwegian business. The firm assists businesses with complex matters as a full-service law firm.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

Who it serves

Its clients are Norwegian and international businesses in both the private and public sectors.

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Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

Positions describe ordering within each source list. See how lists are built ↗

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BADGE PREVIEWThommessen listed #1 on Business law firms, September 19, 2026Open the published source list.
Thommessen

#1 Business law firms

Snapshot: September 19, 2026

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Company information

Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 3, 2026. Directory positions use company-contact counts from separate saved list snapshots dated August 30, 2026, September 7, 2026, September 19, 2026, September 20, 2026, September 23, 2026, September 27, 2026, September 28, 2026 and September 29, 2026. How the company lists are built.

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