Norway’s legal market is defined by a highly competitive elite of independent firms that combine deep local expertise in shipping and energy with massive international reach. In 2026, the landscape is focused heavily on the green energy transition, the booming aquaculture sector, and high-stakes cross-border M&A.
Based on the 2026 Legal 500 and Chambers Global rankings, here are the top 10 law firms leading the market in Norway today.
1. Thommessen
Thommessen is widely regarded as the premier firm in Norway. In the 2026 rankings, it secured a record 17 Tier 1 rankings in the Legal 500, covering everything from Banking & Finance to TMT. They are the primary choice for the most complex capital markets transactions and public M&A in the country, often acting as the lead advisor for Norway’s largest blue-chip corporations.
2. Advokatfirmaet Schjødt
Schjødt is a powerhouse with an increasingly strong Nordic footprint. In 2026, it achieved the distinction of being the only law firm in Norway with top Band 1 rankings across all categories in the Chambers Global guide. Known for being highly commercial and aggressive in M&A and Dispute Resolution, Schjødt is the go-to for private equity deals and high-stakes corporate litigation.
3. Wiersholm
Wiersholm is one of the “Big Four” in Norway, renowned for its technical excellence and sophisticated client base. They excel in Tax, Employment, and Corporate Governance. Their Banking and Finance team is exceptionally strong, often representing international syndicates and major Nordic financial institutions.
4. BAHR
BAHR is synonymous with prestige and is a dominant force in Asset Management, Real Estate, and Oil & Gas. In 2026, they were recognized as the only Norwegian firm ranked Tier 1 in every category of the ITR World Tax guide. They are often involved in “National Interest” deals and have a market-leading practice for energy-sector joint ventures.
5. Wikborg Rein
Wikborg Rein is Norway’s most international firm, with a significant presence in London, Singapore, and Shanghai. This makes them the undisputed leader in Shipping, Maritime Law, and Offshore Energy. They are the first choice for clients navigating international trade disputes and complex maritime financing.
6. Advokatfirmaet Haavind
Haavind has seen a massive rise in prestige, firmly establishing itself among the elite. They are particularly dominant in Construction, Renewable Energy, and Fish Farming (Aquaculture). In 2026, they are highly sought after for large-scale infrastructure projects and green energy transition mandates.
7. Simonsen Vogt Wiig
With a strong presence across Norway’s key coastal cities, Simonsen Vogt Wiig is a top choice for the Oil & Gas and TMT sectors. They are known for their practical, industry-focused advice and maintain one of the country’s most respected practices in Fisheries and Aquaculture.
8. Arntzen de Besche
This firm is a major player in the Norwegian corporate market, specifically known for its strength in Energy and Infrastructure. They have a highly regarded Employment Law practice and are frequently involved in complex labor negotiations and restructuring processes for large industrial groups.
9. Selmer
Selmer is recognized for its unique blend of legal and financial expertise, often employing financial analysts alongside its lawyers. This makes them a favorite for Real Estate, Transactional Tax, and Private Equity. They are praised for their pragmatic, business-oriented approach to deal-making.
10. DLA Piper Norway
As the primary global firm with a full-service presence in Oslo, DLA Piper Norway offers unrivaled international connectivity. They excel in Cross-border M&A and Regulatory Compliance, making them the ideal partner for multinational corporations operating within the Norwegian legal framework.
The “Big Four” and The Market Hierarchy
Traditionally, Thommessen, Schjødt, Wiersholm, and BAHR are considered the “Big Four.” However, the gap is closing as specialized giants like Wikborg Rein lead the world in maritime law.
| Sector Expertise | Top-Tier Specialist Firms |
| Energy & Renewables | BAHR, Thommessen, Haavind |
| Shipping & Maritime | Wikborg Rein, Thommessen, Simonsen Vogt Wiig |
| Corporate / M&A | Schjødt, Wiersholm, Thommessen |
| Tax & Finance | Wiersholm, BAHR, Thommessen |
Key Market Trends in 2026
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Aquaculture Dominance: With Norway leading the world in salmon farming, legal work in Fishing and Aquaculture has become a standalone Tier 1 practice for firms like Haavind.
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Green Energy Transition: The shift from traditional oil and gas to offshore wind and hydrogen has led to a surge in Energy Law mandates.
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Nordic Integration: Many firms, led by Schjødt, are expanding their footprint across Sweden and Denmark to provide a unified “One-Stop Nordic” legal service.
