5 June 2025
Arntzen de Besche and Grette to Merge – Creating a Leading, Nationwide Law Firm with a Strong Market Presence
The law firms Arntzen de Besche and Grette are merging to form Arntzen Grette.
Unique individuals -
leading together
The modern law firm with a proud history
Arntzen de Besche has been a critical player in shaping the laws in Norway since 1870. We are proud of our heritage, yet our ability to demonstrate agile mindedness in our practice allows us to be one of the leading law firms in the country.
With locations around Oslo, Stavanger and Trondheim and a team of 140 specialists across different sectors, we provide our clients with an integrated, proactive approach to their legal and business needs.
Our vision is to be our customer's best advisor
179 unique individuals - leading together
Climate-neutral since 2019
Join us
We are an inclusive law firm with an ethos focussed on teamwork and producing academic quality work.
We aim to assist you to become a skilled business lawyer. We will provide you with a challenging environment to become proficient while facilitating you to grow into your role and thrive professionally and socially.
Broad professional environment adapted to your industry
With experience in most industries, we provide our clients with superb legal knowledge and wisdom, showing deep business and industry understanding in all areas of business law. That means that you get the most outstanding team to help you across practice areas.
Our clients range from large internationally listed companies, financial institutions, governments and organisations to small businesses. Our expertise allows us to resolve complex disputes, assist on transactions and provide short- and long-term strategic advice by providing an integrated and proactive approach to your needs. We see the possibilities and take you where you want to go.
We see the possibilities and take you where you want to go.
News
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19 February 2025
Adaptive AS joins Visma
Adaptive AS has entered into an agreement to be acquired by Visma, a leading provider of business-critical solutions for the property sector. We are proud to have advised Adaptive as legal counsel in this transaction.
13 February 2025
Orkla sells all shares in Pierre Robert Group
We have assisted Orkla ASA in the sale of 100% of the shares in Pierre Robert Group AS to Jotunfjell. The transaction is expected to be completed during the first quarter of 2025, subject to approval by the Norwegian Competition Authority.
21 October 2024
Castik Capital acquires majority stake in Aider
The European private equity fund Castik Capital has acquired a majority stake in the Norwegian accounting and consulting firm Aider. More than 160 employees will retain a collective 45 per cent ownership stake. We are proud to have assisted Castik Capital as legal advisors in this transaction.
13 September 2024
More Individual Rankings in this Year’s IFLR 1000
We are pleased to report strong results in this year’s edition of the International Financial Law Review (IFLR). Notably, we have increased the number of individually ranked lawyers, with 15 of our colleagues recognised this year – four more than in 2023.
21 February 2024
Sennheiser invests in Norwegian scale-up sensiBel
Today, sensiBel, a Norwegian scale-up, announced a significant milestone with the successful closure of their EUR 7 million funding round. The investment was led by Sennheiser, a global leader in professional audio, along with participation from existing shareholders including TRUMPF Venture, Skagerak Capital, Investinor, SINTEF Venture, MP Pensjon, and Halden Kommunale Pensjonskasse. We are proud to have acted as legal advisers to SensiBel throughout this transaction.
6 February 2024
INPEX Idemitsu Norge has successfully completed the sale of its interests in the Statfjord Øst and Sygna fields to Longboat Japex Norge
On 3 July 2023, INPEX Idemitsu Norge agreed to sell its participating interests in the Statfjord Øst and Sygna fields to Longboat Japex Norge, and on 31 January 2024 the transaction was completed. We are pleased to have served as legal advisors to INPEX Idemitsu Norge in this process.
19 January 2024
Landmark decision in Oslo: PDO approvals invalidated by court
Greenpeace and Natur og Ungdom, two Norwegian environmental organisations, won their lawsuit against the Norwegian state on Thursday 18 January 2024. Oslo District Court handed down a decision which invalidated the Ministry of Energy’s approval of the Plans for Development and Operations for three oil and gas fields on the NCS. The projects in question are Breidablikk, Tryving and Yggdrasil.
22 September 2023
Irish investment company DCC plc is acquiring Norwegian Solcellekraft
We are proud to have assisted DCC plc in the purchase of all the shares in Solcellekraft. Over the past few years, the Norwegian startup has experienced significant growth.
21 September 2023
Ergo acquires Storebrand Health Insurance
We are proud to have assisted ERGO, one of Europe's leading financial conglomerates in insures, with this acquisition. The transaction was signed today and is expected to be completed in the first quarter of 2024, with an estimated positive impact of approximately NOK 1.1 billion on Storebrand's Group results.
8 September 2023
Strise successfully raised USD 10.8 Million
Exciting times for the Norwegian start-up Strise who successfully raised USD 10.8 million. The majority of investments come from Skype founder Niklas Zennström and his London-based venture capital firm, Atomico.
7 July 2023
INPEX Idemitsu Norge is selling production assets to Longboat Energy Norge
We are pleased to have assisted INPEX Idemitusu Norge with the sale of production assets in the Statfjord area to Longboat Energy Norge, for USD 12.75 million.
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Values and engagement
We are committed to the environment and sustainability. We are a proud member of the climate network Skift. Together with a number of other business players, we are working on launching concrete measures to help Norway achieve their sustainability goals by 2030.