Advokatfirmaet Thommessen AS fields highly sought-after advisers for transactional mandates concerning oil and gas assets, energy infrastructure, and renewable energy facilities. Headed up by longstanding wind and hydropower expert Bendik Christoffersen, the renewable energy and infrastructure department regularly advises clean power developers and operators across M&A and project development mandates. Key contacts include Snorre Valdimarsson, who acts for leading domestic and multinational energy companies on M&A mandates surrounding electricity and heat generation assets, and Jacob F Bull, who specialises in the development of landmark battery production facilities. Christian Hals, who focuses his practice on hydrocarbon asset M&A, leads the oil and gas and oil service teams. Bolstering the firm’s expertise, Audun Stornes assists with regulatory matters concerning oil and gas transactions, June Snemyr advises oil majors on transition journeys, and Pål Lieungh and Mads Haavardsholm are key contacts for regulatory issues and transactions in the oil services sector.

Legal 500 Editorial commentary

Testimonials

Collated independently by Legal 500 research team.

  • ‘The Thommessen team is essential to make our Norwegian business work. We have developed a deep working relationship with the Thommessen team that allows for little supervision. Handing matters to the Thommessen team means that you can be certain it gets done, and done well.’
  • ‘The team consists of highly competent advisers and lawyers within the renewables industry. They not only possess expertise in parts of the industry, they possess an in-depth understanding of the whole renewables industry, allowing them to be able to advise on a holistic perspective and become familiar with aspects, guidelines, and regulations that could affect the industry's future.’
  • ‘Thommessen's team are very knowledgeable on all the legal aspects related to electricity and renewable energy. They hold a high standard when it comes to understanding the technical aspects of these industries thus communicate easily both with the clients and other parties involved in either transactions, legal consulting or litigation. I have not experienced any other Norwegian law firms that hold this combined competence.’
  • ‘Deep industry knowledge combined with strong subject matter experts in law. Personal relations to most decision makers in the Norwegian industry is a huge advantage.’
  • ‘Extreme capacity to implement and execute several ongoing and complex projects. Empirical team from both sides of the table on a lot of transactions. Capable to combine the commercial and legal part. Good liaison in legal actions abroad.’
  • ‘One of Norway's largest and most experienced teams within the renewable energy field. The team covers all legal aspects of the energy sector. They focus on our success and help us to reach our goals.’
  • ‘Bendik Christoffersen is pleasant to work with, an expert in his field and has unique experience and knowledge when it comes to regulatory framework and actors in the energy sector.'
  • 'Ole Christoffer Ellingsen and Snorre Valdimarsson are excellent lawyers. Pragmatic, patient, solution orientated and proactive. Highly recommended.’

Key clients

  • BP International
  • Equinor
  • Kongsberg Gruppen
  • Seadrill
  • DOF Group
  • Island Offshore
  • Island Drilling Company
  • Vard Group AS
  • Odfjell Drilling
  • Transocean
  • Shelf Drilling
  • BW Offshore
  • Wellesley Petroleum
  • HAV Group ASA
  • TTC Norge
  • DNV GL
  • A/S Nymo
  • BW Energy
  • Japex Norge AS
  • Longboat Energy plc
  • Wintershall Dea Norge
  • DNO ASA
  • Hav Energy AS
  • Autentik AS
  • Petoro AS
  • Northern Lights JV DA
  • TotalEnergies E&P Norge AS
  • Optime Subsea AS
  • ECOnnect Energy AS
  • OMV Norge
  • Azane Fuel Solutions AS
  • Kabal AS
  • Ventura Offshore Holding Ltd.
  • Sar Group
  • Marine Aluminium AS
  • Pandion Energy Norge AS
  • Green Investment Group
  • Eidsiva Energi AS with subsidiaries
  • Lyse AS / Lyse Energi AS with subsidiaries
  • Nordkraft AS with subsidiaries
  • FREYR AS
  • Haugaland Kraft AS with subsidiaries
  • Tonstad Vindpark AS
  • Zephyr AS
  • Haram Kraft AS
  • Midtfjellet Vindkraft AS
  • Lutelandet Energipark AS
  • Glitre Energi AS/Å Energi AS with subsidiaries
  • Vardar AS with subsidiaries
  • Sira-Kvina Kraftselskap
  • Småkraft AS
  • Tysvær Vindpark AS
  • Østfold Energi AS
  • Yve AS (incl Kraftriket AS and Polar Kraft AS)
  • Beyonder AS
  • HitecVision
  • Epex Spot
  • Encavis AG
  • Aker BP ASA
  • Deep Wind Offshore AS
  • Holmaneset H2 AS (Fortescue Future Industries International Pty Ltd.)
  • Cadre AS
  • SWEN Capital Partners
  • InfraVia Capital Partners
  • Fu-Gen AG
  • Solgrid AS
  • Scatec ASA
  • Release Solar AS
  • Havfram AS
  • Cloudberry ASA
  • Sunday Power AS
  • Fenix Repower AS
  • Northvolt AB
  • Endra AS
  • Aneo AS
  • Eviny AS
  • Elmera Group ASA

Work highlights

  • Advised Eviny AS on the acquisition of Tellenes and Guleslettene wind farms from BlackRock.
  • Advised DNO Norge AS on its acquisition of participating interests in the Norne area from Vår Energi.
  • Advised Nordkraft and Cadre on the acquisition of power rights in the Statkraft-operated hydro power plants Svartisen and Kobbelv, combining public ownership with a virtual power plant PPA.

Lawyers

Hall of Fame: Electricity and renewable energy
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.
Leading partners: Oil and gas
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners: Electricity and renewable energy
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Next Generation Partners: Oil and gas
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.

Practice head

The lawyer(s) leading their teams.

Christian Hals, Bendik Christoffersen

Other key lawyers

Audun Stornes, Pål Lieungh, Mads Haavardsholm, Jacob F Bull, June Snemyr, Snorre Valdimarrson, Ole Christoffer Ellingsen