Arntzen Grette

Managing Partner: Håvard Sandnes

Number of lawyers: 200

Languages: English, German, Scandinavian languages

In October 2025, Grette and Arntzen de Besche 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.

Asset Management

Capital markets

Climate, Environmental and Circular Economy

Commercial contracts

Commercial property

Competition Law

Compliance and Investigations

Construction law

Data Protection and Cybersecurity

Directors’ and Officers’ Liability

Dispute resolution

ESG

Employment and pensions

Financial regulation

Financing

Fisheries and Aquaculture

Food law

German Desk

Health Industry

Human Rights and Labour Conditions

Industry

Infrastructure

Insurance

Intellectual Property

Merger and acquisitions

Offshore Wind

Offshore and shipping

Oil and gas

Private Equity and Venture Capital

Professional Liability

Public Ownership

Public procurement

Regulatory and Governmental Affairs

Renewable energy

Restructuring and insolvency law

Sanctions and Export Control

State Aid and EU/EEA Law

Tax law

Technology and innovation

Trade

Transport and Mobility

Workplace accidents

Oslo

Ruseløkkveien 30, 0251 Oslo

P.O. Box 2734 Solli, 0204 Oslo

Trondheim

Beddingen 16, 7042 Trondheim

P. O. Box 8853, 7481 Trondheim

Stavanger

Kongsgårdbakken 1, 4005 Stavanger

Mo i Rana

Søndre gate 3, 8624 Mo i Rana

P.O Box 151, 8601 Mo i Rana