

Advokatfirmaet Thommessen AS
Client SatisfactionAdvokatfirmaet Thommessen AS‘ EU and competition practice covers the full range of matters, including antitrust investigations and merger control work, across a diverse range of sectors. Leading the team is Heidi Jorkjend, who is well versed in complex antitrust investigations. Singled out as ’a true expert in the field’, Siri Teigum leads on complex merger control cases and investigations. The group also includes Eivind Vesterkjær, who takes point on competition, state aid and public procurement matters, fellow competition expert Eivind Sæveraas, who is also a key name for cartel matters, and Wenche Sædal, who is a key adviser on EU/EEA law and competition work. The team is well supported by associates Elen Botten and Trine Siri Dahl.
Testimonials
Collated independently by Legal 500 research team.
‘Siri Teigum is exceptional in combining in-depth legal expertise with a clear and concise communication style. Her efficiency in handling matters is remarkable, consistently delivers high-quality work at short deadlines. A true expert in the field, Siri is a valuable asset to anyone seeking top-notch legal advice in competition law.’
‘The practice is knowledgeable and has a wide and international reach, can readily assess/flag antitrust issues in multiple jurisdictions, not just within the EU. ’
‘Eivind Vesterkjær is very hands-on and prompt in his response to our questions. He is very knowledgeable and practical in his approach. Appreciate his willingness to help and also being available to help us with our questions.’
‘Big team which combines highly experienced and industry-leading lawyers with driven newcomers. The team further combines diverse expertise, strong collaboration, and a clear commitment to diversity.’
‘Heidi Jorkjend knows our business in and out and finds perfect ways to involve herself exactly where expected and needed, all while being an overall pleasure to work with.’
‘We have benefited from Heidi Jorkjend's and Elen Botten's expertise and guidance. Heidi and Elen were very accessible and good at following during the process. ’
‘Exceptional strength within competition law and ownership control within M&A.’
‘Siri Teigum is in a class of her own when it comes to competition law.’
Key clients
- SpareBank 1
- Kongsberg Gruppen
- Veidekke ASA
- Ringnes ASA
- Lindum AS
- Eviny AS
- BAMA
- NorgesGruppen ASA
- Circle K
- Mestergruppen
- El-Proffen AS
- Ferd
- Triton Partners
- DAF Trucks N.V. / DAF Trucks Deutschland GmbH
- Lyse AS / Lyse Produksjon AS
- Kahoot! ASA
- Storebrand ASA
- HitecVision
- Bomega AS
- Elkem ASA
- Alto
- Apotek 1 Gruppen
- BW LPG Limited
- Danske Bank
- Wintershall Dea
- BW Offshore Limited
- Bane NOR
- Fremtind Forsikring ASA
- Eika Forsikring ASA
- DOF ASA
Work highlights
- Assisting NorgesGruppen ASA in relation to the Norwegian Competition Authority's ongoing investigation of the Norwegian foodstuffs market.
- Advised a major player in the Norwegian pharmacy market in connection with an investigation by the Norwegian Competition Authority.
- Acted as joint advisers for the merger between insurance companies Fremtind Forsikring AS and Eika Forsikring AS.
Lawyers

Practice head
The lawyer(s) leading their teams.
Heidi Jorkjend