Advokatfirmaet Thommessen AS > Oslo, Norway > Firm Profile

Advokatfirmaet Thommessen AS
Ruseløkkveien 38, 0251 Oslo
PO Box 1484 Vika
NO-0116 Oslo

Norway > Banking and finance (including shipping finance) Tier 1

Advokatfirmaet Thommessen AS‘ ‘very strong bank financing team‘ has a notable reputation for its strength in advising on large acquisitions, syndicated corporate financings, cross-border financing mandates and project finance matters. The department is also recognised for its expertise in high-profile restructuring matters, and ‘possesses a unique insight in regulatory banking law‘, an area in which Tore Mydske excels. The ‘outstandingEllen Teresa Heyerdahl, who leads the group, ‘knows the law and the business‘, while Hans Haugstad is well versed in acquisition and real estate financing work, and Halvor Mansåker advises private equity houses on leveraged financing transactions. Managing associate Pernille Engstrøm Skaug is ‘hands-on and diligent‘.

Practice head(s):

Ellen Teresa Heyerdahl


‘Thommessen has a very strong position in the bond market and are good at combining bank lending and bond financing, which is important in the Nordic market.’

‘Deep knowledge of regulatory practices by the Norwegian FSA and Ministry of Finance. Very good knowledge of relevant EU law.’

‘Tore Mydske: hands-on and unique overall insight in Norwegian regulatory banking law.’

‘They are very service-minded and knowledgeable, and share their knowledge with their clients.’

‘Ellen Teresa Heyerdahl’s support stood out. She was outstanding.’

‘Ellen Teresa Heyerdahl – partner – she knows the law and the business, making her a very good discussion partner. Pernille Engstrøm Skaug – senior associate – hands-on and diligent.’

Key clients


Nordea Bank

Danske Bank

Svenska Handelsbanken

Skandinaviska Enskilda Banken

Eksfin(Norwegian ECA)

Pareto Securities AS

ABG Sundal Collier

Nordic Corporate Bank ASA

Euronext Oslo Børs

Pareto Alternative Investments AS

Storebrand ASA

Sparebank1 Gruppen AS

Eksportkreditt Norge AS

Sparebank 1 SR-Bank

Finance Norway

Kommunal Landspensjonskasse (KLP)

Gabler Investments AS

Pareto Bank AS

Work highlights

  • Assisted a syndicate of lenders with the refinancing of Scatec ASA.
  • Advised Storebrand Asset Management on financial regulatory issues regarding the client’s co-investment with two Danish pension funds in a NOK45bn infrastructure fund.
  • Advised a syndicate of lenders with DNB Bank as an agent on the NOK34bn restructuring of Solstad Offshore, involving the conversion of NOK12m debt.

Norway > Capital markets Tier 1

Advokatfirmaet Thommessen AS‘ department has ‘very strong competence in capital markets‘. Led by Christian Grüner Sagstad, the ‘very experienced and service-minded‘ team provides ‘quality and practical advice‘ to prominent corporates and investment banks on a broad spectrum of equity and debt capital markets matters, including private placements, high-profile IPOs and stock exchange listings, and large bond issuances. The ‘service-mindedEinar Grette is highly regarded for his expertise in bond and debt transactions, and Hans Cappelen Arnesen is ‘very good at finding solutions and ensuring a smooth execution‘ when handling ECM mandates. Anders Arnkværn is singled out for M&A and refinancing work, Solveig Fagerheim Bugge focuses on securities law and regulatory work, and newly promoted partner Lars Martin Sveen acts for issuer and manager clients on private placement and listing matters.

Practice head(s):

Christian Grüner Sagstad


‘A very good understanding of commercial aspects, and empathy with the priorities of all parties in difficult negotiations. A realistic view of the regulatory process.’

‘Splendid to work with, with hands-on involvement and the ability to pull together internal resources and keep them updated, so that there are no gaps in the service from one meeting with one set of participants to the next where a different group gathers.’

‘Hard-working, creative, always responsive, constructive and solution oriented.’

‘Clear, practical and actionable advice.’

‘Fast, to the point advice; pragmatism; good understanding of clients’ business and requirements; high degree of professionalism without being overly bureaucratic.’

‘All their focus is on providing simple but strong solutions to the complex problems that can arise in capital markets.’

‘Anders Arnkværn’s extensive knowledge of the capital markets and corporate matters provides assurance that we are in good hands as far as corporate/capital markets advice is concerned.’

Key clients

Goldman Sachs International

ABG Sundal Collier

Pareto Securities

DNB Markets

Carnegie AS

Danske Bank


Arctic Securities

Skandinaviska Enskilda Banken AB

Sparebank 1 Markets

Morgan Stanley

UBS Investment Bank

Fearnley Securities

Seadrill Ltd

Salmones Camanchaca S.A.


Webstep ASA

Elkem ASA

Odfjell Drilling Ltd.

B2Holding ASA

Oslo Børs VPS Holding ASA

Kongsberg Gruppen ASA

Shelf Drilling, Ltd.

BW Group Limited

BW Offshore Limited

BW LPG Limited

BW Energy Limited

Hafnia Limited

Nordic Trustee AS

Navamedic ASA

RAK Petroleum plc

Stolt-Nielsen Ltd.



MPC Container Ships ASA

Magseis Fairfield ASA

Pioneer Property Group ASA

Mercell Holding

Icelandic Salmon AS

Everfuel A/S

Komplett ASA

Norwegian Property ASA

Lytix Biopharma AS

Work highlights

  • Advised ABG and DNB Markets as managers in connection with the second round of the refinancing of Norwegian Air Shuttle ASA.
  • Represented ABG Sundal Collier, Jefferies International, Carnegie and SpareBank 1 Markets as underwriters in Link Mobility Group ASA’s NOK6bn IPO and listing on the Oslo Stock Exchange.
  • Acted for DNB Markets and Fearnley Securities AS in the $200m senior unsecured sustainability-linked bond issuance of Seaspan Corporation.

Norway > Commercial, corporate and M&A Tier 1

Christian Grüner Sagstad heads up Advokatfirmaet Thommessen AS‘ corporate and M&A practice, which has established expertise in handling cross-border, complex private and public M&A mandates for a roster of oil and gas, financial services, telecoms, aquaculture and renewables sector clients. Anders Arnkværn  and Hans Cappelen Arnesen are highly regarded practitioners in the space and regularly advise on M&A and equity capital markets work. Solveig Fagerheim Bugge is a key contact for securities matters, while Ervin Auren represents real estate and renewable energy clients. Øyvind Mork Karlsen was promoted to the partnership in January 2021.

Practice head(s):

Christian Grüner Sagstad


‘Hard-working, creative, responsive, solution-oriented.’

‘Highly competent, hard working, come up with creative solutions to problems, and always respond rapidly.’

‘High quality advice.’

‘Unbelievable attention to detail and responsiveness.’

‘Reliable, service-minded and skilled.’

‘Thommessen typically is strong at not only making the client understand the issues, but also come up with clear advice.’

‘The uniqueness is the ability to get a lot of complex legal requirements for going public as a company into understandable and practical deliverables. The project management is also of great importance when undertaking an IPO and Thommessen really has a strong project management ability.’

Key clients

Altor Equity Partners

Triton Partners





Danske Bank

Kongsberg Gruppen



Bain Capital

Goldman Sachs


Nordic Capital


Bank Norwegian

Odfjell Drilling Ltd.


BW Group

Oslo Børs VPS Holding

Belships ASA


CBRE Caledon

Pioneer Property Group ASA

Reiten & Co.

Accel Management

Mercell Holding

Altia plc.


Work highlights

  • Advising Danske Bank on the merger between Nordic mobile payment providers MobilePay, Vipps AS and Pivo.
  • Advising Bank Norwegian on Nordax AB’s public offer for all shares in the company, following its merger with Norwegian Finance Holding ASA.
  • Advised robotics and software company AutoStore AS on SoftBank Group’s acquisition of a 40% stake worth $2.8bn in the company.

Norway > Dispute resolution Tier 1

Advokatfirmaet Thommessen AS‘ team is ‘very experienced in dispute resolution‘, with established expertise in commercial litigation, post-M&A disputes and construction claims. The practice has a particularly strong offering for banking clients, and recent instructions for the group include high-profile insolvency litigation and insurance disputes. Department head Kristine Hyldmo Bjørnvik focuses on contractual disputes concerning IT, construction, oil and energy projects. Henning Harborg is ‘an excellent advocate with good instincts‘, and Eirik W Raanes is ‘an excellent litigator‘. Andreas Meidell excels in the insurance sector, and Trond Hatland and Stig Berge are also key names to note.

Practice head(s):

Kristine Hyldmo Bjørnvik


‘Good in terms of commercial litigation and insolvency knowledge. Very responsive.’

‘Clear and pragmatic advice all the time.’

‘Thommessen is very experienced in dispute resolution. They look at the case in its entirety and provide advice that is practical. They have a thorough knowledge of the market and hence make well informed suggestions.’

‘Henning Harborg: excellent advocate with good instincts.’

‘Eirik Raanes is an excellent litigator.’

Key clients


Deloitte AS


PricewaterhouseCoopers AS


ING Bank N.V

Telenor ASA

Storebrand ASA

Equinor ASA

BW Group Limited

BW LPG Limited

The Norwegian Ministry of Transport / The Norwegian Public Road Administration (NPRA)

Westcon Yards AS

Directors/shareholders of RenoNorden

Lofoten Polarlaks AS

Hav Line Gruppen AS

TGS Nopec Geophysical Company ASA

Mr. Petter Dragesund

The bankruptcy estate of Alpha Insurance A/S


Norxe AS

Intervet International BV

Zimmer Biomet Norway AS

Pareto Securities AS

Songa Corp.

Assuranceforeningen Gard (gjensidig)

Lyse Produksjon AS

Samsung Electronics Nordic AB

Gasum Oy


Søylen Eiendom AS

Tryg Forsikring A/S

Kongsberg Gruppen ASA

Norwegian Hull Club

Navigators Holdings (UK) Ltd

Bane Nor SF

Kesko Corporation

Orkla ASA

Norgesgruppen ASA

Eika Gruppen AS

Koppernæs AS

DAF Trucks Deutschland GmbH

Haugaland Kraft AS


Kimek AS

Cap Vest

Work highlights

  • Successfully represented the Danish bankruptcy estate of Alpha Insurance before the Supreme Court. The case concerned the insolvency exception in the Lugano Convention, and other jurisdictional issues pertaining to cross-border insolvencies.
  • Successfully represented Zimmer Biomet Norway in a multi-jurisdictional trade secrets dispute against Heraeus Medical.
  • Successfully represented Westcon Yards in an appeal before Gulating Court of Appeal against a former judgment relating to a long-running dispute with Prosafe Rigs.

Norway > Electricity and renewable energy Tier 1

At Advokatfirmaet Thommessen AS, Bendik Christoffersen leads the practice, which acts for a high-profile roster of utility and energy companies. Renewables work is a core pillar of strength for the department, and the team regularly handles high-profile M&A mandates, regulatory matters, financings and dispute resolution, to name a few areas of expertise. Christoffersen is noted for handling complex transactional mandates for clients in the renewables sector, and also advises on concession issues. Gunnar Martinsen specialises in regulatory work, and Jacob F Bull assists with development projects and contractual issues. Jens Naas-Bibow departed to establish his own firm.

Practice head(s):

Bendik Christoffersen

Other key lawyers:

Gunnar Martinsen; Jacob F. Bull


‘The team is excellent in helping to secure common ground and making negotiations move forward, in addition to finding balanced legal contracts for long-term business relationships.’

‘Deep sector knowledge.’

‘Gunnar Martinsen and Bendik Christoffersen combine deep industry knowledge with practical solutions.’

Key clients

Green Investment Group

Akershus Energi AS

Eidsiva Energi AS with subsidiaries

Lyse AS / Lyse Energi AS with subsidiaries

Nordkraft AS with subsidiaries

Freyr AS

Engie International Holdings BV (Tonstad wind farm)

Zephyr AS

Haram Kraft AS

Lutelandet Energipark AS and Bremangerlandet Vindpark AS

Glitre Energi AS with subsidiaries

Avantor AS

Vardar AS

Sira-Kvina Kraftselskap

Småkraft AS

Coöperatieve Rabobank U.A.

Tysvær Vindpark AS

Østfold Energi AS

Kraftriket AS

Work highlights

  • Advised Lyse on the merger of its hydro power business with Norsk Hydro, creating Lyse Kraft, one of the largest hydro power producers in Norway.
  • Advising Glitre Energi AS on the ongoing merger process with Agder Energi AS, in order to create one of the largest integrated power utility groups in Norway.
  • Acted as joint legal adviser to Kraftriket AS and Polar Kraft AS on the merger between the companies, creating one of the largest power retailers in Norway.

Norway > Employment Tier 1

Advokatfirmaet Thommessen AS’ practice has ‘high competence with complex employment law matters‘ and ‘delivers a high-quality service every time‘. Stein Kimsås-Otterbech leads the ‘always available, dedicated and effective‘ team, which has notable strength in advising oil and gas sector clients on the full range of employment law issues. Trond Hatland leads the employment team in Bergen, and is regularly instructed on contentious employment mandates. Tron Dalheim is ‘a very experienced employment lawyer, who combines clear advice with a calm and professional style‘. At managing associate level, Ingrid Cathrine Nielsen handles cross-border employment work, transfers of undertakings, redundancies and individual terminations, and Håkon Bergehas high integrity and a solution-oriented focus‘. Senior associate Alexandra Refsnes is also a name to note.

Practice head(s):

Stein Kimsås-Otterbech

Other key lawyers:


‘High competence with complex employment law matters. Strong performance within litigation. Experienced team.’

Practical approach.’

‘Trond Dalheim is a very experienced employment lawyer. He combines clear advice with a calm and professional style. He is service-minded and always hands-on, knowing how much work is needed to handle our risks.’

Alexandra Refsnes is one of Thommessen’s emerging talents. We are impressed with both her legal skills, good judgement and independent way of solving complex cases.’

‘Advokatfirmaet Thommessen and its team within employment deliver high quality services every time. Always available, dedicated and effective, and aiming for good solutions for its clients.’

‘Håkon Berge has high integrity and a solution-oriented focus. Always available at short notice, supportive, efficient, and clear in his advice.’

Key clients

Equinor ASA

Microsoft Norge AS

B2Holding ASA


Maersk Drilling Norway AS

Kongsberg Gruppen ASA

NorgesGruppen ASA

Bama Gruppen AS

Yara International ASA

Roche Norge AS

University of Bergen

Vestland county authorities

FH Gruppen AS

Höegh Autoliners Management AS

CGG Services

CapMan Infra and CBRE Caledon

DOF Subsea

Etac AB/Etac AS

Frydenbø AS

Framo AS

Oceaneering AS


Zalando SE


Wintershall DEA Norge AS

AS Norske Shell

Scandinavian Airlines System (SAS)

MDE Group AS / MDE Personnel AS

Work highlights

  • Assisting global online platform company Kahoot! ASA with all areas of employment law, including global remote working issues.
  • Advising Microsoft Norway on the full range of employment law issues, including workforce adjustments and reductions and settlement agreements.
  • Assisting Equinor with several employment disputes, including cases of termination of employment.

Norway > EU and competition Tier 1

Advokatfirmaet Thommessen AS‘ department stands out for its ‘extensive experience and in-depth knowledge about competition law‘. The team covers complex antitrust investigations, public procurement matters, joint ventures and mergers, state aid work, regulatory issues and competition litigation, and acts for clients from a range of sectors. Siri Teigum is ‘an excellent competition lawyer with good client handling skills‘; she co-heads the practice with Eivind J Vesterkjaer, who is instructed by clients from the retail, technology, telecoms, shipping and offshore industries on merger control, pricing and distribution work. Heidi Jorkjend was promoted to partner in January 2021.

Practice head(s):

Siri Teigum; Eivind J. Vesterkjær

Other key lawyers:

Heidi Jorkjend


‘Experience and knowledge about Norwegian and international competition laws and practice.’

‘Siri Teigum has unique knowledge and experience on competition law.’

‘Top team with high degree of skills and precise advice.’

‘Eivind J. Vesterkjær has very high integrity, and puts our interests as a client first like few other lawyers do. His ability to provide sound legal advice applied to our business is second to none. Also, he is a genuinely pleasant person to work with.’

Key clients

Telenor ASA


SpareBank 1

Kongsberg Gruppen

Veidekke ASA


Gyldendal ASA

Lindum AS



NorgesGruppen ASA

Circle K


El-Proffen AS


Triton Partners

DAF Trucks N.V. / DAF Trucks Deutschland GmbH

Lyse AS / Lyse Produksjon AS

Legemiddelindustrien LMI

Lesaffre International

Sbanken ASA

Nordic Tyre Group AB

Work highlights

  • Advising Telenor on its application to the EFTA Court, seeking an annulment of the EFTA Surveillance Authority’s fining decision.
  • Representing NorgesGruppen in the ongoing investigation by the Norwegian Competition Authority into competitive conditions in the Norwegian foodstuffs sector.
  • Advising SBanken on its potential takeover by major Norwegian bank DNB.

Norway > Fishing and aquaculture Tier 1

Advokatfirmaet Thommessen AS‘ fisheries and aquaculture practice is distinguished in the market for its ‘unique understanding of the industry‘. High-value M&A deals and regulatory issues have been prominent in the team’s recent workload, alongside complex litigation, patent matters and capital markets-related work. The client base includes banks, fish farmers and producers, and seafood companies. Practice head Mons Alfred Paulsenhas a very broad and deep understanding of the legal framework‘. The ‘very client-oriented and hands-onRune Ulriksen Steinsland regularly advises on capital markets transactions, contractual issues and M&A matters.

Practice head(s):

Mons Alfred Paulsen

Other key lawyers:


One of the strongest in the market.’

Thommessen deploys an incredible knowledge of the aquaculture sector.’

Mons Alfred Paulsen is one of the most experienced and respected lawyers in Norway within the fisheries and aquaculture area, with deep industry knowledge.’

Mons Alfred Paulsen has the experience and expertise necessary in an industry subject to strict and complex regulation. He has high integrity and a solution-oriented focus. Always available at short notice, supportive, efficient, and clear in his advice.’

Rune Ulriksen Steinsland is an outstanding lawyer, with his in-depth knowledge of the sector. He is always looking for a solution for making a deal to work for all parties in a sensible manner, and is a “go-to” lawyer in aquaculture in Norway.’

Key clients



MSD Animal Health


NCE Seafood/The Seafood Innovation Cluster

DNB Bank

Nordea Bank

Hav Line Gruppen

Austevoll Seafood/ Br. Birkeland

Måsøval Eiendom AS

Måsøval AS



Firda Seafood Group



Production Area 4


Proximar Seafood

Ice Fish Farms

Work highlights

  • Advised Måsøval on its acquisition of Pure Farming, the aquaculture business of Pure Norwegian Seafood (PNS); the client also purchased a 65% stake in PNS.
  • Representing 25 fish farmers in the Western region of Norway in an ongoing class action brought against the Norwegian government in relation to the fishing regulatory procedure dubbed the ‘traffic light system’.

Norway > Insolvency and corporate recovery Tier 1

Advokatfirmaet Thommessen AS‘ restructuring and insolvency practice is home to a ‘top-class, highly knowledgeable, creative, solution-minded and diligent‘ team, which provides ‘first-class service and advice‘. The department has been kept busy acting as lead counsel to banks and syndicates of lenders in connection with multiple financial restructurings within the Norwegian oil sector. Kristoffer Hegdahl, who heads up the team, is ‘hands-on, commercial, and solution-oriented‘, and has expertise in assisting lenders, borrowers and stakeholders with workouts, financially distressed scenarios and financial restructurings. The ‘very knowledgeableEllen Teresa Heyerdahl focuses on advising lenders,  borrowers and managers on bank and bond financings. Specialist counsel Øyvind Dehli and managing associate Faraz Ahmed Ali are also key names to note.

Practice head(s):

Kristoffer Hegdahl


‘The Thommessen team is a solid team when it comes to knowledge, experience, service-minded approach and initiative. In our experience, they add a lot of value in complex structures with their practical approach when solving complex issues. The team works well together.’

‘Kristoffer Hegdahl is hands-on, commercial, solution-oriented and has impressed us with his ability to handle complex cases with various stakeholders.’

Ellen Teresa Heyerdahl is solution-oriented, very knowledgeable and nice to work with.’

Øyvind Dehli is experienced and a good discussion partner. He is also very knowledgeable.’

Faraz Ahmed Ali is hard-working, solution-oriented and nice to work with.’

‘The team led by Kristoffer Hegdahl is always available and respond quickly.’

‘Kristoffer Hegdahl and Faraz Ahmed Ali are a great duo with high industry and legal knowledge and experience. They deliver industry-leading services, trustworthy advice, and are always available. They have great interpersonal skills which is important in challenging situations.’

Key clients

Nordic Trustee


Nordea Bank

Danske Bank


GIEK (The Norwegian Export Credit Guarantee Agency)


ABN Amro


The Export-Import Bank of China (CEXIM)


Eksportkreditt (Export Credit Norway)

Eksportfinans ASA



Danish Ship Finance

SpareBank 1 SR-Bank

Sparebank 1 Søre Sunnmøre

Sparebanken Møre

Skandinaviska Enskilda Banken (SEB)

MPC Containerships ASA



Work highlights

  • Acting for prominent offshore driller company Seadrill on its ongoing financial restructuring.

Norway > Insurance Tier 1

With notable expertise in marine insurance mandates, Advokatfirmaet Thommessen AS is equally adept at advising major national and international insurers on a range of contentious and non-contentious matters. Practice head Andreas Meidell has notable experience in litigation, and assists with marine and cargo insurance, reinsurance and property and liability claims. Henrik Hagberg is noted for his expertise in shipping and oil sector work, while financial services regulatory matters are a core strength of Tore Mydske‘s practice. Managing associate Henrik Fabian Torgrimsby regularly assists with infrastructure projects.

Practice head(s):

Andreas Meidell


‘Andreas Meidell is considered as one of the best insurance lawyers in Norway. He is also a very good litigation lawyer.’

‘Henrik Fabian Torgrimsby is very good.’

‘Probably the best insurance team in Norway.’

Key clients


Den norske Krigsforsikring for Skib

Norwegian Hull Club

Tryg Forsikring


UK Club










Storebrand Livsforsikring AS

Gjensidige Forsikring AS

Fremtind Forsikring AS

Finans Norge

Work highlights

  • Providing ongoing assistance to Chubb, QBE, RiskPoint and Navigators concerning a D&O claim worth NOK1.3bn.
  • Successfully represented the bankruptcy estate of Alpha Insurance before the Norwegian Supreme Court in litigation concerning insurance jurisdiction.
  • Representing Finans Norge, the Norwegian branch association for insurance companies, in a dispute with the Norwegian FSA and the Norwegian Ministry of Finance on the correct interpretation of the Norwegian Insurance Activities Act.

Norway > Intellectual property Tier 1

Advokatfirmaet Thommessen AS‘ practice is highly regarded for its ‘vast experience in IP‘. The ‘very professional‘ team is led by Camilla Vislie, who ‘stands out as one of the best IP litigation lawyers in Norway‘ and regularly advises clients from the media, technology and life sciences sectors on contentious matters. Large-scale trade marks disputes are a recognised area of strength for the group, which is also sought out for its expertise in patent and trade secrets litigation. In addition, the practice has a track record in assisting with the intellectual property aspects of transactional matters. Eirik W Raanes focuses on assisting aquaculture, oil and gas and pharmaceuticals sector clients with litigation, pre-litigation and non-contentious work, and senior associate Charlotte Høgnes advises on marketing law. Magnus Hauge Greaker was promoted to partner in January 2021.

Practice head(s):

Camilla Vislie


‘Eirik Raanes and Magnus Greaker have the ability to oversee complex cases and are able to distil the core issues. Their knowledge of the market is really good, and with that they can provide advice that also makes sense from a business point of view.’

‘Camilla Vislie’s dedication, focus on details and strong team with very strong IP competence is very valuable, especially in major cases/litigation.’

‘Camilla Vislie stands out for her outstanding IP competence, work dedication, and ability to organise a strong team in Thommessen.’

Charlotte Høgnes is very skilled and able to assess a great amount of facts and details, put them together and suggest genius strategic thoughts.’

‘Camilla Vislie is highly qualified and experienced within the IP sector. She is available and provides practical and good advice in a prompt manner.’

Key clients

TEVA and Yeda

Lilleborg AS (an Orkla ASA company)



Zimmer Biomet Norway AS

BioMar AS

Dagens Næringsliv AS

Amicoat AS

Vinhuset NoFra AS

Domaine Montrose SARL


Intervet International BV

Defa AS

Welltec A/S

Rolex (Gros & Waltenspühl)

Samsung Electronics

Norgesgruppen ASA

IFPI Norway


GW Pharma AS

Arbaflame AS

Noroff AS

Kellogg AB

Defa AS

Ecomerden AS

Work highlights

  • Successfully represented Zimmer Biomet Norway before the Norwegian Court of Appeal in a complex multi-national trade secrets dispute against Heraeus Medical.
  • Represented media company Dagens Næringsliv in a high-profile dispute against media surveillance service Retriever concerning alleged copyright infringement and unfair competition issues.
  • Representing BioMar in patent litigation against STIM and MariCal before the Court of Appeal. The cases involves allegations of infringement and patent validity issues.

Norway > Maritime law Tier 1

Advokatfirmaet Thommessen AS‘ shipping practice is home to a ‘strong‘ team, which is ‘always available and gives good advice‘. The group leverages the expertise of its M&A, banking and insolvency departments in order to assist clients with the whole spectrum of shipping and maritime matters. Mads Haavardsholm handles restructurings, transactions, shipbuilding contracts and the sale and purchase of vessels, and oil and gas expert Henrik Hagberg is well versed in advising across a broad range of non-contentious and contentious work in the sector, with a particular focus on marine-related insurance matters.

Practice head(s):

Mads Haavardsholm; Henrik Hagberg


‘They react quickly, with thorough and well-founded advice.’

‘Hands-on approach. Always available and always looking out for our best interests. Questions are answered quickly and professionally. The team compliments each other.’

‘Strong team, always available and gives good advice.’

‘We experience a friendly professional atmosphere dealing with this firm.’

Key clients

Höegh Autoliners and Höegh LNG

Wilh Wilhelmsen Holding ASA

Gard AS


Pareto Securities AS

Island Offshore AS

Jo Tankers AS

Knutsen NYK Offshore Tankers ASA

Norwegian Hull Club

BW Maritime/BW Offshore/BW LPG

Team Tankers International Ltd.

Fearnley Advisors AS

TRF Ship Management AS

Clean Marine AS

Belships ASA

Kongsberg Gruppen ASA

Gdansk Shiprepair Yard “Remontowa” SA

Tschudi Shipping Company

Hunter Group ASA

Odfjell SE



G2 Ocean




Viken Shipping

Arne Blystad AS

Western Bulk Charterering AS

Den Norske Krigsforsikring for Skib

Work highlights

  • Acted as counsel on both the sell side and the buy side concerning MPC Container Ships ASA’s acquisition of a 100% stake in Songa Container AS.
  • Advising OHT ASA on an agreement to combine OHT with Subsea 7’s renewables business unit.
  • Representing Bibby Transport and its insurers in ongoing legal proceedings arising from a damages claim brought by Yara Asia.

Norway > Offshore construction and shipbuilding Tier 1

Advokatfirmaet Thommessen AS‘ offshore construction and shipbuilding department is praised for its ‘deep industry knowledge‘. Shipowners, shipyards, rig-owners, supplier companies and contractors are included in the firm’s client base, and complex transactional mandates and restructurings remain prominent in the team’s workload. Pål Lieungh ‘has excellent negotiations skills driven by his commercial mindset and hands-on approach‘; he jointly leads the practice with Henrik Hagberg and Mads Haavardsholm. Construction expert Jacob F Bull advises on offshore oil and gas and renewable energy projects.

Practice head(s):

Pål Lieungh; Mads Haavardsholm; Henrik Hagberg

Other key lawyers:

Jacob F. Bull


‘Jacob Bull is exceptional, and a true all-rounder in construction matters whether onshore or offshore. He is well trusted by colleagues and clients, also serving as an arbitrator which serves as a further solid testimony to his capabilities.’

‘Top qualified people – expedient and top quality results.’

‘Jacob Bull – very good understanding of the business. Has a commercial mindset, and broad experience base. Draws on all of this while giving solid legal advice. Also good with people – quickly builds trust and a good negotiation atmosphere.’

‘Mads Haavardsholm in Thommessen is a pleasant and likable person, but can take the bad cop position when that is required. Such personal capabilities combined with the legal and commercial skillset sets him apart from other lawyers I know.’

‘Pål Lieungh has excellent negotiations skills driven by his commercial mindset and hands-on approach.’

Key clients

Equinor ASA (previously Statoil ASA)

Myklebust Verft

DNO International ASA

Island Offshore/Borgstein

RAK Petroleum PLC

Enhanced Drilling AS


Kongsberg Gruppen


Viken Shipping

Gdansk Shiprepair Yard “Remontowa” S.A.

Vard Group AS

Fearnley Advisors AS/Transportation Recovery Fund

Apollo Asset Ltd/Hunter Group ASA

Arne Blystad/OHT ASA

Qatar Navigation – Milaha

Econnect Energy AS

Island Drilling AS

OHT Alfa Lift AS

TECO 2030 AS

Wellesley Petroleum AS

France Pelagique SAS

J.D. Irving, Limited / Atlantic Harrier Limited Partnership

Southern Wind Shipyards (PTY) Limited

Westcon Yards AS

Green Island Shipholding

Work highlights

  • Successfully represented Westcon Yards AS in an appeal hearing against Prosafe Rigs Pte Ltd, arising from a NOK800m dispute concerning the conversion of the tender support vessel Safe Scandinavia.
  • Advising OHT Alfa Lift AS on negotiations with China Merchants concerning a newbuild contract for the construction of a semi-submersible offshore windfarm foundation installation vessel.
  • Assisted the Alsaker Group with the whole process of the construction of a live fish carrier vessel, which was built at the Astilleros de Murueta shipyard in Spain.

Norway > Oil and gas Tier 1

The oil and gas team at Advokatfirmaet Thommessen AS is jointly led by M&A expert Christian Hals and Pål Lieungh, who has established expertise in assisting Norwegian companies with international projects. The group is well versed in handling high-profile litigation, complex development projects, and M&A mandates. In the Stavanger office, Audun Stornes is sought out for his expertise in contentious work arising from upstream oil and gas matters; Thomas Abrahamsen assists E&P clients with a broad range of corporate issues; Jone Stakkestad‘s workload includes procurement and transactional matters; and June Snemyr is a key name for regulatory matters.

Practice head(s):

Christian Hals; Pål Lieungh


‘The team is quick with responses, always available and very dedicated.’

‘Great team that is knowledgeable, practical and nice to deal with. Good attention to detail, drafting, analysis and strategy. Covering the full range of oil and gas related topics. Able to deal with all aspects. Real powerhouse.’

Key clients

BP International

Kongsberg Gruppen




Island Offshore

Energean Oil & Gas

PGNiG Upstream Norway

Odfjell Drilling


Shelf Drilling

Vår Energi

BW Offshore

RAK Petroleum


MOL Norge


Myklebust Verft

TTC Norge

Veolia Environmental


PGNiG Supply & Trading

A/S Nymo

BW Energy

Longboat Energy

LOTOS Exploration And Production Norge

Wintershall DEA Norge


Suncor Energy Norge AS

Ægir Energi AS

Hav Energy AS

Sval Energy AS



Work highlights

  • Advised Longboat Energy on a high-value E&P transaction, involving farm-in agreements related to a drilling programme on the Norwegian continental shelf.
  • Assisted Energean Oil & Gas with its acquisition of Edison Exploration & Production.
  • Represented Westcon Yards in litigation against Prosafe Rigs concerning the conversion of a tender support vessel.

Norway > Tax Tier 1

Advokatfirmaet Thommessen AS‘ team stands out for its ‘deep insight in tax issues, good business understanding and good advice‘. With substantial expertise in the energy and renewables sector, the department is also well known for advising a client roster of venture capital and seed capital companies, global financial institutions, private equity funds and asset managers on VAT and structuring issues. Tax litigation forms a key pillar of Finn Backer-Grøndahl‘s practice, and Ståle R Kristiansen has been kept busy handling large-scale transfer pricing disputes. Marius Holm Rynning, who leads the practice, is also the main contact for asset management matters. Bergen-based Espen Ommedal is well versed in shipping tax issues and international tax law, while Bjørn Christian Lilletvedt Tovsen leads the indirect tax group.

Practice head(s):

Marius Holm Rynning


‘The practice has individuals with strong technical tax skills relevant to multinational corporates, including broad experience of litigation.’

‘Ståle Kristiansen – very focused on client service, collaborative, and broad experience on international tax issues including litigation.’

‘The team provides very practical advice and provides excellent guidance on how to handle uncertain matters and what to expect in Norwegian tax controversy.’

‘In my opinion it is the engagement they show in trying to solve your problems, but at the same time also having the ability to give you realistic advice.’

Key clients




Telenor ASA

TGS NOPEC Geophysical Company ASA

Alcoa Corporation Inc


Skatteklagenemnda (the Tax Appeal Board)

Odfjell SE

Sølvtrans AS

Intership AS

Westfal Larsen AS/ Masterbulk Pte Ltd.

Knutsen NYK Offshore Partners LP

Work highlights

  • Representing the Norwegian Tax Appeal Board in an appeal before the Supreme Court, concerning a law suit filed by the Norwegian Ministry of Finance to annul a decision made by the client in favour of five different tax payers regarding deductions of input VAT following the sale of real estate.
  • Assisted Idekapital Fund 2 with its successful fund raise.

Norway > TMT Tier 1

Advokatfirmaet Thommessen AS‘ practice has ‘unique knowledge and experience within the legal aspects of digital transformation, IT sourcing, privacy/GDPR and cyber security in an international setting‘. The ‘extraordinarily knowledgeable‘ team is led by Christopher Sparre-Enger Clausen, who has ‘unique knowledge of and experience within legal aspects of digital transformations‘, and regularly assists clients in the fintech and medtech sectors. Clausen’s practice also includes handling M&A transactions for telecoms and technology sector entities. Espen Werring has ‘excellent skills in tech contracts‘ and is well versed in advising on IT sourcing projects, licensing issues, GDPR mandates and cloud contracts. Associate Nikolai Rekman is ‘super responsive‘, and assists Norwegian and international clients with cybersecurity, data protection and competition law matters.

Practice head(s):

Christopher Sparre-Enger Clausen

Other key lawyers:


‘Espen Werring has very good negotiation skills and excellent legal understanding. He is effective and available, and a very pleasant man to have in the team.’

‘It is always a pleasure to work with and speak to any member of the team. They are service-minded and professional, and provide practical advice. The team knows our business in and out, and follow the market developments closely. They understand that there is more to a decision than the legal aspects and are always prepared to provide a practical solution, not only legal advice.’

‘Christopher Sparre-Enger Clausen has the unique combination of being relaxed, business minded and solution oriented, as well as highly professional and with an eye for the details (and solutions) many might miss. With all of his team members, the same kind of service and professional advice are offered and I feel very much prioritised and appreciated as a client. They see solutions and offer practical and possible-to-implement advice.’

‘Nikolai Rekman provides understandable advice and guidance to non-lawyers, as well as excellent project management.’

‘Key strengths of the practice include highly knowledgeable, great project managers, and a great understanding of the client’s interests. It combines great craftmanship with thinking outside the box to come up with solutions which work.’

‘Christopher Sparre-Enger Clausen has been very successful in building a great team through authentic leadership. His team delivers very high quality work because they are incredible individuals, but also because he is there backing them up and leading the team.’

‘Nikolai Rekdal has huge talent.’

‘Excellent legal skills combined with very good knowledge about the market and what’s possible to achieve. The combination makes them able to find good solutions and get the agreement in place.’

Key clients

Microsoft Corporation (including its Norwegian subsidiary, Microsoft Norge AS)

Samsung Electronics AB

Otovo AS

Autostore AS

Elvia AS

Oslo Børs (Euronext Oslo Stock Exchange)


Kahoot! AS

Eika Gruppen

Lyse Energi AS including its subsidiaries Altibox and Smartly

NHST Media Group AS (Dagens Næringsliv)

Zalaris ASA


NomVec AS

Circle K Norge

Dunnhumby Limited

My Game AS

Work highlights

  • Acting as Norwegian counsel to Microsoft, providing advice on data protection, cybersecurity, dispute resolution, regulatory compliance, public procurement, and contract drafting matters.
  • Advising banking alliance group Eika Gruppen on the implementation of an outsourcing agreement, involving over 50 banks.
  • Acting as Norwegian counsel to Samsung Electronics on data protection/GDPR matters, e-commerce, marketing, consumer law and disputes.

Norway > Construction Tier 2

Advokatfirmaet Thommessen AS handles high-profile work relating to large renewable energy, real estate and infrastructure sector development and construction projects. The team is equally adept at advising on construction litigation; Kristine Hyldmo Bjørnvik is a key contact for contentious work. Offshore and onshore construction expert Jacob F Bull leads the department, which includes managing associate Henrik Fabian Torgrimsby, who assists with infrastructure projects, and senior associate Alexander Stulien, who handles contractual disputes.

Practice head(s):

Jacob F Bull


‘Really nice “down to earth” people with good understanding and experience from relevant business areas.’

‘Very strong team.’

‘Jacob Bull: very competent, very responsive,’

‘Team handles a broad range of complex industrial and infrastructure projects, including infrastructure expansions and commercial real estate and housing projects. They are agile and practical in their approach.’

‘Client-focused rather than self-focused. Work fast and efficient.’

‘Always available to assist.’

‘The team is very experienced and knowledgeable about construction practices. They have a very solution oriented approach and always create a good and professional atmosphere in negotiations. Their team has the ability to resolve almost all issues very swiftly and efficiently.’

‘Jacob Bull – very experienced and professional. Henrik Fabian Torgrimsby – experienced and very efficient. A quick thinker and very good at finding good solutions for the clients. Always available.’

Key clients

NorthConnect KS

Zephyr AS

Lyse Produksjon AS

Midtfjellet Vindpark AS

Bremangerlandet Vindpark AS

Lutelandet Energipark AS

Odal Vindkraftverk AS/Akershus Energi Vind AS

Elektrizitätswerk Stadt Zürich (EWZ)

Eidsiva Energi AS

Elvia AS

Sira-Kvina Kraftselskap DA

Watrium Eiendom AS

Yara International ASA

Vestland Fylkeskommune


Universitetet i Bergen

K21 Holding AS

Neptune Properties AS

Mustad Eiendom AS

Agder OPS Vegselskap AS

Arbaflame AS

Austri Vind


Engie/Tonstad Vindpark AS

Jølstra Kraft DA

Westcon Yards AS

Haram Kraft AS

Green Investment Group


Glastad Farsund AS

Work highlights

  • Assisting FREYR with all contractual and real estate matters related to the construction of a battery cell production plant.
  • Assisting Mustad Eiendom AS with an ongoing, complex property development project, comprising residential and commercial properties.
  • Assisting Bybanen Utbygging with the development of the Bybanen Light Rail Project in Bergen.

Norway > Real estate Tier 2

Even Bratsberg heads up Advokatfirmaet Thommessen AS‘ team, which clients praise as ‘very business oriented and understands the real estate industry‘. The ‘deal-oriented‘ group handles a steady workflow of transactional mandates, and property development projects are an increasing area of instruction for the department. Christopher Borch has an excellent track record in advising on commercial deals, leasing and property syndication matters, and Christian Müller has extensive expertise in property development issues. Managing associate Mette Borger Fyksen advises domestic and international clients on large property transactions.

Practice head(s):

Even Bratsberg


‘Sophisticated approach.’

‘Even Bratsberg is extremely easy to work with and understands what’s important but at the same time he looks after all the details. He is always available.’

‘Christian Müller has a well developed commercial mindset.’

‘A very capable team with competencies in both real estate and corporate M&A which is very useful for listed European players.’

‘Excellent knowledge of the law.’

‘The individual lawyers are skilled and professional. They are always present and deliver in due time.’

Key clients

Arctic Securities AS

Clarksons Platou Real Estate AS

Nordic Real Estate Partners AS

Samhällsbygnadsbolaget i Norden AB

Norwegian Property ASA

Aspelin Ramm Eiendom

Oslo Areal AS

Starwood Capital Group

Watrium Eiendom AS

Promenaden Property AS

Scandinavian Property Group AS

Angelo Gordon

Meyer Bergman

Realkapital Investor AS

Oslo Airport City AS

Storebrand Eiendom AS

Søylen Eiendom AS

Industrifinans Capital AS

Kruse Smith Eiendom AS

Bulk Industrier AS

Mustad Eiendom AS

Geilo Holding AS


Glastad Farsund AS and Fortus AS

Vika Project Finance AS

Carucel Eiendom AS

Canica Eiendom AS

Eiendomshuset Malling & Co AS /Malling & Co Eiendomsfond AS

Tellus Eiendom AS

Tristan Capital Partners

Scandinavian Development Constructive Development AS

Orkla Eiendom AS

Neptune Properties AS

Norgesgruppen ASA

Bane NOR Eiendom AS

Avantor AS

Brødrene Jensen AS

Mont Investor AS

NRE Norway AS

HCH Eiendom AS

Njord Securities

Orkla Eiendom AS

Tellus Eiendom AS

Wahl Eiendom AS

Scala Eiendom AS

Ferd Eiendom AS

Oro Eiendom AS

Work highlights

  • Assisted Gardermoen Logistikkbygg AS with the NOK3bn sale of a large distribution centre near Gardermoen Airport.
  • Assisted SBB with a NOK700m investment in listed company Solon Eiendom ASA; the transaction also involved the client’s divestment of residential development assets to Solon for NOK2bn.

Thommessen is one of Norway’s leading commercial law firms, with offices in Oslo, Bergen, Stavanger and London. Since our foundation in 1856, we have been closely involved in most of the defining developments in Norwegian business. Our clients are Norwegian and international businesses, in both the private and public sector.

At Thommessen, we enable our clients to achieve their objectives by understanding their challenges and opportunities. Our advice is clear, well-founded and practically oriented, and is premised on in-depth understanding of the factors affecting the interests of our clients, whether commercial, technological, societal, political or global.

Earning trust
Our business is built on trust. We repay that trust by how we relate to each other, our clients, our business partners and other parties. In a rapidly changing world, we are focused on understanding our clients and tailoring our services to their needs. We earn trust.

Managing Partner Sverre
Asset Management Marius Holm
Banking and financing Ellen Teresa
Compliance and investigations Andreas
Construction Jacob F
Data protection and cyber security Christopher Sparre-Enger
Debt capital markets Einar
Dispute resolution Kristine Hyldmo Bjø
Employment Stein Kimså
Equity capital markets Solveig F
EU/EEA and competition Siri
Financial regulation Tore
FinTech Christopher Sparre-Enger
Fishery and aquaculture Mons Alfred
Insolvency and restructuring Kristoffer
Insurance Andreas
Intellectual property and marketing law Camilla
Life sciences and health care Magnus Hauge
M&A Christian Grüner
Oil and gas Christian
Oil service Pål
Private equity Christian Grüner
PropTech Christopher Sparre-Enger
Public Procurement Eivind J Vesterkjæ
Real estate Christian Mü
Renewable energy and infrastructure Bendik
Retail Eivind J Vesterkjæ
Shipping Mads
Sustainability and climate risk Tore
Tax and duties Finn Backer-Grø
Technology and digitalisation Espen A
Venture capital Ylva B. Gjesdahl
Thomas Abrahamsen photoMr Thomas AbrahamsenPartner. Thomas is a corporate generalist attorney with substantial transaction experience, in…
Hans Cappelen Arnesen photoMr Hans Cappelen ArnesenMr Hans Cappelen Arnesen (“Hasse”) works primarily with matters concerning M&A, offerings…
Anders Arnkværn photoMr Anders ArnkværnPartner. Mr Anders Arnkværn has long experience within the areas of M&A…
Ervin Auren photoMr Ervin AurenPartner. Mr Ervin Auren works primarly with mergers, acquisitions and capital market…
Finn Backer-Grøndahl photoMr Finn Backer-GrøndahlPartner. Mr Finn Backer-Grøndahl works with both national and international tax law…
Baard Bale photoMr Baard BalePartner. Mr Baard Bale focuses on, and has significant experience with, equity…
Stig Berge photoMr Stig BergePartner. Mr Stig Berge is one of Norway’s leading lawyers within corporate…
Christopher Borch photoMr Christopher BorchPartner. Mr Chris Borch mainly works with purchase and sale, development, leasing,…
Even Bratsberg photoMr Even BratsbergPartner. Mr Even Bratsberg has twenty years of experience as lawyer in…
Solveig Fagerheim Bugge photoMrs Solveig Fagerheim BuggePartner. Mrs Solveig Fagerheim Bugge has extensive experience with M&A and capital…
Jacob F Bull photoMr Jacob F BullMr Bull’s work mainly relates to offshore and onshore construction projects within…
Bendik Christoffersen photoMr Bendik ChristoffersenMr Christoffersen works with matters concerning renewable energy and focuses on concession…
Tron Dalheim photoMr Tron DalheimTron is a recognized employment law adviser to Norwegian and international companies.…
Ylva Gjesdahl Petersen photoMrs Ylva Gjesdahl PetersenYlva works with equity capital market transactions and M&A across various industries,…
Einar Grette photoMr Einar GretteMr Einar Grette’s practice focuses on financing and restructuring in the bank-…
Mads Haavardsholm photoMr Mads HaavardsholmMr Haavardsholm works primarily with contract negotiations and transactions towards clients in…
Henrik Hagberg photoMr Henrik HagbergPartner. Mr Henrik Hagberg has broad experience from working with both contentious…
Christian Hals photoMr Christian HalsPartner. Christian works primarily with M&A and securities law within the oil…
Henning Harborg photoMr Henning HarborgMr Harborg assists clients from a wide range of business areas with…
Magnus Hauge Greaker photoMr Magnus Hauge GreakerPartner Magnus mainly works with patent, trademark and trade secrets litigation, for…
Hans Haugstad photoMr Hans HaugstadMr Hans Haugstad predominantly works with financing transactions and assists both banks/financial…
Kristoffer Hegdahl photoMr Kristoffer HegdahlPartner. Kristoffer has extensive experience from domestic and cross-border financing transactions, acting…
Ellen Teresa Heyerdahl photoMrs Ellen Teresa HeyerdahlPartner. Mrs Ellen Teresa Heyerdahl has extensive experience with financing. She assists…
Kristine Hyldmo Bjørnvik photoMrs Kristine Hyldmo BjørnvikPartner. Kristine mainly works with dispute resolution with a particular focus on…
Heidi Jorkjend photoMrs Heidi JorkjendPartner Heidi works with competition law and marketing law. She has broad…
Stein Kimsås-Otterbech photoMr Stein Kimsås-OtterbechMr Stein Kimsås-Otterbech has extensive experience with matters concerning employment law and…
Ståle R Kristiansen photoMr Ståle R KristiansenMr Kristiansen advises several major Norwegian and foreign companies in connection with…
Pål Lieungh photoMr Pål LieunghMr Lieungh has many years of experience as legal advisor within the…
Bjørn Christian Lilletvedt Tovsen photoMr Bjørn Christian Lilletvedt Tovsen2018-current Partner, Oslo office, Thommessen; 2015-2017 Managing Associate, Oslo office, Thommessen; 2012-2014 Senior…
Halvor Mansåker photoMr Halvor MansåkerMr Mansåker works primarily with debt capital market transactions, assisting both managers…
Gunnar Martinsen photoMr Gunnar MartinsenA significant part of Mr Martinsen’s work is related to the conditions…
Andreas Meidell photoMr Andreas MeidellMr Meidell works mainly on commercial insurance claims and coverage issues, such…
Øyvind Mork Karlsen photoMr Øyvind Mork KarlsenPartner Øyvind has long experience within Mergers & Acquisitions, and acts for…
Christian Müller photoMr Christian MüllerMr Müller has been involved in a large number of the most…
Tore Mydske photoMr Tore MydskeMr Mydske advises financial companies with what is considered as regulated activity…
Reidar Myhre photoMr Reidar MyhreAssociate Partner. In recent years, Mr Myhre has been involved in several…
Ingrid Cathrine Nielsen photoMrs Ingrid Cathrine NielsenManaging Associate Ingrid Cathrine advises both Norwegian and international clients within all…
Mons Alfred Paulsen photoMr Mons Alfred PaulsenMr Paulsen primarily works with matters concerning tax and duty law as…
Eirik W Raanes photoMr Eirik W RaanesMr Raanes works primarily with dispute resolution within contract law, construction law,…
Marius Holm Rynning photoMr Marius Holm RynningPartner. Mr Marius Holm Rynning primarily works with tax law and corporate…
Lars Eirik Gåseide Røsås photoMr Lars Eirik Gåseide RøsåsPartner. Mr Lars Eirik Gåseide Røsås advises a number of listed companies…
Christian Grüner Sagstad photoMr Christian Grüner SagstadHead of M&A and Corporate law department, Partner. Mr Christian Grüner Sagstad,…
Christopher Sparre-Enger Clausen photoMr Christopher Sparre-Enger ClausenPartner. Christopher heads Thommessen’s Technology and Data Protection practice group and specialises…
Eivind Sæveraas photoMr Eivind SæveraasAssociate Partner. Mr Sæveraas is primarily recognised for his work on several…
Siri Teigum photoMrs Siri TeigumMrs Teigum acts as an advisor and litigator in procurement matters, and…
Sverre Tyrhaug photoMr Sverre TyrhaugManaging Partner. Mr Sverre Tyrhaug has advised on a number of share…
Eivind J Vesterkjær photoMr Eivind J VesterkjærMr Vesterkjær’s practice focuses on matters relating to competition law, public procurement…
Olav Vikøren photoMr Olav VikørenMr Vikøren has extensive experience assisting a wide range of players in…
Camilla Vislie photoMrs Camilla VislieMrs Vislie heads Thommessen’s IP and Technology practice. She works mainly with…
Espen Werring photoMr Espen WerringEspen is a trusted adviser to organizations developing and implementing their mission-critical…
Number of lawyers : 195
at this office : 160
Norwegian Bar Association
Lex Mundi
Contact : Sverre Tyrhaug, managing partner (
Other offices : Bergen
Other offices : Stavanger
Other offices : London

Diversity Statement
Diversity and inclusion is a strategic priority for Thommessen. We are a company based on knowledge and expertise, where the most valuable asset is our employees. We acknowledge that there is room for improvement within diversity, and have therefore during the last seven years introduced a number of initiatives to increase diversity, some of which are described here.

We strive to be an attractive workplace and employer for everyone, regardless of gender, age, background, ethnicity, religion, physical capacity and sexuality. In our view, it is all about fostering an engaging teamwork culture where everyone feels included and valued.

At Thommessen, we have also recognized the importance of unconscious discrimination (bias). We have, among other things, structured the recruitment process and developed a recruitment tool together with an assessment and talent measurement company where we evaluate candidates against predefined characteristics identified through various personality and ability tests. Through this process, we reduce unconscious discrimination in the recruitment and selection process.

We have established a designated Women’s Committee, which supports the management in its efforts to improve our gender balance and increase retention of female lawyers. The Committee is also charged with facilitating female staff bonding by holding monthly lunches and other professional and social events.

In the current strategy period, we have chosen to continue to prioritize gender balance and multicultural diversity. Our strategy includes specific targets for increasing the proportion of women among our senior attorneys and partners in addition to employees with a minority background. In order to reach these targets, we have introduced a number of measures in relation to recruitment, management training, flexibility for staff with small children, etc.

At Thommessen, we believe that diversity and inclusion is best achieved through the day to day work, i.e. through the execution of the projects with our clients. We see that employees who experience that they gain knowledge, master their tasks and contribute in a meaningful way, tend to engage more, stay on longer and perform better, which again benefits the project. This is why we generally have a strong focus on building an open and including team culture.

Sponsorships and collaborations
At Thommessen, we seek, together with our clients, to shape the business sector of the future and to safeguard corporate values and the rule of law. Our social involvement is not only reflected in the work we do, but also through the NGOs we support. We support several ambitious CSR and pro bono initiatives. Knowledge is our key resource, and represents our main contribution to enabling NGOs to pursue their mission under optimum conditions.

I relations to our work with social diversity, we support several NGO’s and initiatives including:

  • The Norwegian Women’s Football Association
    From January 2020 Thommessen is official partner of the Norwegian Women’s Football Association. We want to take part in developing Norwegian women’s football, especially linked to increased professionalization and competence enhancement. At Thommessen we are committed to highlighting female talents – both in the legal profession and in football. The agreement allows the Norwegian Women’s Football Association to access a learning tool for football players based on VR technology, provided by Be Your Best.
  • #ShesGotThis / Equality Check
    #ShesGotThis is an organisation addressing gender stereotypes and unconscious bias. Thommessen is one of its founding partners, and we have assisted #ShesGotThis in a range of legal issues in its start-up phase. The organisation also serves as a key advisor in our efforts to increase our proportion of female managing associates and partners. The founders have also launched Equality Check, a community-based platform where employees can leave anonymous reviews about equal opportunity, company culture, work/life balance and the management’s commitment to diversity. Thommessen encourages all employees to leave their assessment of Thommessen.
  • Big Enough Global
    We are main partner with Big Enough Global (BEG). A youth organization that will work to create solutions within the UN’s sustainability goals, and which, among other things, works to promote the importance of multicultural diversity in the workplace, which is a strategic focus area for Thommessen.