Arntzen Grette

In October 2025, Arntzen de Besche and Grette merged to form Arntzen Grette, the largest merger in the history of the Norwegian legal market. The new firm brings together around 200 lawyers and two of Norway’s leading full-service practices, creating a strong, comprehensive and highly specialised law firm with offices in Oslo, Stavanger, Trondheim and Mo i Rana.

With increased scale and depth, Arntzen Grette is well positioned to handle complex and cross-border matters across all key areas of business law. The firm combines extensive experience from major transactions, projects and disputes with deep industry knowledge and a strong international network, built through longstanding collaboration with some of the world’s leading law firms.

Arntzen Grette assists Norwegian and international businesses, organisations and public authorities, offering solution-oriented legal advice across the full spectrum of commercial law. With a strategic focus on innovation, digitalisation and sustainability, the firm is equipped to meet the challenges of the future and to continue advising on the most demanding and high-profile matters in the Norwegian and international markets.