The dispute resolution team at Lex Law Offices continues to lead in the space, with key clients including major banks and governmental institutions, and recent work in a variety of industries, including aviation, fishing, and engineering. Practice head Arnar Þór Stefánsson has argued before the Supreme Court and brings strong experience in disputes with international components. Óskar Sigurðsson and Guðjón Ármannsson provide support with property, real estate, and energy issues, and Garðar Víðir Gunnarsson continues to be an arbitration expert. Another key name in the team is Fjölnir Ólafsson. Stefán A. Svensson joined the firm in February 2026.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Billing & efficiency
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
- ‘The team at Lex is highly diverse, bringing together a wide range of expertise. Over the years, they have been able to provide us with all the legal support we have needed, always with professionalism and reliability.’
- ‘What truly makes the team at Lex stand out is their depth of knowledge and breadth of expertise across all areas of law. They are consistently able to provide clear, practical solutions tailored to our needs. Our main contact, Óskar Sigurðsson, has been outstanding—always responsive, efficient, and quick to deliver high-quality advice that fully meets our requirements. We greatly value the combination of professionalism, reliability, and personal attention that Lex provides, which sets them apart from competitors.’
- ‘The team has great experience in dealing with disputes and gives practical advice in terms of dispute resolution and is able to represent our interests in full, when applicable.’
- ‘Arnar Þór Stefánsson is great to work with and an extremely experienced and result-oriented lawyer.’
Key clients
- Bondholders of WOW air hf.
- Samherji hf.
- Landsbankinn hf.
- EFLA hf.
- Þórður Már Jóhannesson
- Bláfugl ehf.
- Former shareholders of Valka hf.
- Baader Beteiligungsgesellschaft mbH
- N4A ehf.
- Landsvirkjun sf.
- Kópavogur municipality
- Lífeyrissjóður Verslunarmanna
Work highlights
Assisted the Icelandic Association of Local Authorities in a dispute over the legality the Icelandic Teachers’ Association’ strike.
Represented Kópavogur municipality in a case centred on the expropriation of the highly valuable land at Vatnsendi.
Representing Baader Beteiligungsgesellschaft mbH in a legal dispute concerning their acquisition of an Icelandic high-tech company from the Icelandic party.
Lawyers
Hall of Fame
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
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Arnar Þór Stefánsson
Stefán A. Svensson
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Practice head
Kristín Edwald; Arnar Þór Stefánsson
Other key lawyers
Óskar Sigurðsson; Guðjón Ármansson; Garðar Víðir Gunnarsson; Fjölnir Ólafsson; Stefán A. Svensson