Arntzen Grette

Firm Details:

Chairman: Karl Rosén

Managing Partner: Håvard Sandnes

Number of partners: 59

Number of lawyers: 140

Languages: English, Farsi, French, German, Scandinavian languages, Spanish

Firm Overview:

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.

Main Areas of Practice

Banking & Finance:

5 partners and a total of 12 fee-earners

Arntzen de Besche has for a long time served as adviser to both Norwegian and foreign clients, and has been engaged in preparing official reports and in legislative work.

Contact: Trond Kildal

Tel: +47 982 94 632

Email: [email protected]

Commercial Property & Construction:

13 partners and a total of 26 fee earners

Arntzen de Besche has an extensive practice within commercial property and is involved in most of the largest transactions in this area.

Contact: Thomas Øslebø

Tel: +47 982 94 547

Email: [email protected]

Corporate & M&A:

13 partners and a total of 27 fee earners

Arntzen de Besche offers advice on all aspects of corporate law. Within the area of M&A and securities law, the firm’s transactions range from small private acquisitions to large domestic and cross-border takeovers, often as advisers to domestic and international investment banks and investors.

Contact: Knut Martinsen

Tel: +47 977 13 237

Email: [email protected]

Employment:

10 partners and a total of 23 fee earners

Arntzen de Besche is a leading employment law firm with experienced and dedicated employment law experts within all fields of employment law, including employment litigation, pensions, privacy protection, collective employment law, maritime and public sector employment law.

Contact: Sven Bjørk

Tel: +47 982 94 585

Email: [email protected]

EU/EEA Law & Competition:

4 partners and a total of 10 fee earners

Arntzen de Besche has extensive experience within merger control, cartels, abuse of dominant position, state aid, public procurement and the four freedoms. Experience from the Norwegian Competition Authority, the EFTA Surveillance Authority (ESA) and other authorities.

Contact: Svein Terje Tveit

Tel: +47 950 62 685

Email: [email protected]

Fisheries & Aquaculture:

4 partners and a total of 10 fee earners

Arntzen de Besche is a leading firm in the sector and has extensive experience assisting on all aspects including different types of transactions, dispute resolution, public regulation, day-to-day operations as well as reorganisation and generational change.

Contact: Ole Skeidsvoll Moe

Tel: +47 909 51 191

Email: [email protected]

Litigation & Arbitration:

16 partners and a total of 30 fee earners

Arntzen de Besche has special expertise and extensive experience in dispute resolution and counselling professional liability. Long experience from law firms, the Office of the Attorney General, the EFTA Court and the ECJ and as judges of the ordinary courts. Several of the firm’s lawyers act as arbitrators on a regular basis.

Contact: Eivind Landmark Tandrevold

Tel: +47 982 94 643

Email: [email protected]

Oil, Gas & Energy:

8 partners and a total of 19 fee earners

Arntzen de Besche’s attorneys have been preferred Counsel for oil companies on the Norwegian Continental Shelf for 40 years, and are today advising international majors and other industrial players, governments and national oil companies on all aspects of the oil and energy sector.

Contact: Karl Erik Navestad

Tel: +47 982 94 566

Email: [email protected]

Renewable Energy & Climate

5 partners and a total of 9 fee earners

Arntzen de Besche advices some of the largest Scandinavian power producers regarding their Norwegian operations concerning gas to power, renewables and Kyoto mechanisms. The firm’s experience also includes climate change and pioneering legal work related to carbon capture and storage.

Contact: Odd-Harald Berg Wasenden

Tel: +47 900 76 908

Email: [email protected]

Restructuring & Insolvency

6 partners and a total of 10 fee earners

Arntzen de Besche has extensive experience in handling cases both assisting companies with problems and creditors seeking optimal solutions. The firm has been involved in some of the largest and most complex restructurings in Norway in the last couple of years.

Contact: Trond Kildal

Tel: +47 982 94 632

Email: [email protected]

Shipping & Offshore:

7 partners and a total of 13 fee earners

Arntzen de Beche assists some of the largest players on the Norwegian Continential Shelf and leading banks in litigations, transactions, project development, financing, taxation and intellectual property matters.

Contact: Erlend L. Solberg

Tel: +47 907 29 949

Email: [email protected]

Technology & Innovation:

3 partners and a total of 5 fee earners

Arntzen de Besche provides legal counselling to both national and international clients within the technology, media and telecommunications sectors. Wide-ranging experience assisting in establishing protection strategies in order to maximise the commercial and strategic value of the client’s intellectual property.

Contact: Tommy Dahlen

Tel: +47 994 57 460

Email: [email protected]

Tax:

2 partners and a total of 5 fee earners

Arntzen de Besche has a strong tax practice and several of the tax lawyers are considered to be among the leading tax practitioners in Norway covering all aspects of domestic and international tax and VAT, planning and dispute resolution.

Contact: Eyvind Sandvik

Tel: +47 982 94 518

Email: [email protected]