Company lists · Data refreshed September 2026

Top 25 Energy sector law firms based in Norway

RevenueBase identified 48 energy sector law firms headquartered in Norway as of September 2026 and tracks 1,324 professional contacts across them, including 546 with verified work emails. Oslo is the largest hub.

This list covers energy sector law firms headquartered in Norway, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review
48Companies
1,324Contacts tracked
546Verified emails
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The 25 largest energy sector law firms based in Norway

Ranked by team size
Top 25 of 48 energy sector law firms based in Norway, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to energy sector law firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceOslo, NorwayHQ checked Sep 21, 2026201-500334 contacts →

Indirect evidence

“The roots of Advokatfirmaet Wiersholm extend back to 1875.”

Source: RevenueBase Database · checked Sep 21, 2026
2Partial evidenceVika, NorwayHQ checked Sep 21, 2026201-500231 contacts →

Partial evidence

“Haavind is one of Norway’s leading law firms.”

Source: RevenueBase Database · checked Sep 21, 2026
3Indirect evidenceOslo, NorwayHQ checked Sep 21, 2026201-500230 contacts →

Indirect evidence

“Simonsen Vogt Wiig’s 180 lawyers assist national and international clients from offices in Oslo, Bergen, Trondheim, Stavanger, Kristiansand, Tromsø and Singapore.”

Source: RevenueBase Database · checked Sep 21, 2026
4Partial evidenceOslo, NorwayHQ checked Sep 21, 202651-200132 contacts →

Partial evidence

“We assist our clients with advice and procedural assignments in all key areas of law.”

Source: RevenueBase Database · checked Sep 21, 2026
5Indirect evidenceStavanger, NorwayHQ checked Sep 21, 202611-5044 contacts →

Indirect evidence

“I over 100 år har Haver Advokatfirma vært en trygg juridisk partner for næringslivet.”

Source: RevenueBase Database · checked Sep 21, 2026
6Partial evidenceOslo, NorwayHQ checked Sep 21, 202611-5028 contacts →

Partial evidence

“BERNGAARD is a law firm in Oslo with vast expertise in construction law, technology and media, and public procurement.”

Source: RevenueBase Database · checked Sep 21, 2026
7Indirect evidenceSandvika, NorwayHQ checked Sep 21, 202611-5027 contacts →

Indirect evidence

“Advokatfirmaet Dehn har kompetanse og erfaring på de fleste rettsområder, og bistår både virksomheter, privatpersoner og det offentlige.”

Source: RevenueBase Database · checked Sep 21, 2026
8Partial evidenceOslo, NorwayHQ checked Sep 21, 202611-5024 contacts →

Partial evidence

“AGP is a transactions, capital markets and corporate focussed law firm in Oslo, Norway.”

Source: RevenueBase Database · checked Sep 21, 2026
9Partial evidenceOslo, NorwayHQ checked Sep 21, 202611-5023 contacts →

Partial evidence

“Advokatfirmaet Lund & Co er et spesialistfirma med fokus på energi, miljø- og naturressursrett med tilhørende rettsområder; offentlig rett, fast eiendom, selskaps- og skatterett.”

Source: RevenueBase Database · checked Sep 21, 2026
10Partial evidenceOslo, NorwayHQ checked Sep 21, 20261-1014 contacts →

Partial evidence

“Dæhlin Sand advokatfirma - DSA - er et spesialistfirma med hovedfokus på eiendom, fornybar energi og miljø.”

Source: RevenueBase Database · checked Sep 21, 2026
11Indirect evidenceHamar, NorwayHQ checked Sep 21, 202611-5014 contacts →

Indirect evidence

“Advokatfirmaet Mageli har kontorer i Hamar, Lillestrøm og Oslo.”

Source: RevenueBase Database · checked Sep 21, 2026
12Partial evidenceOslo, NorwayHQ checked Sep 21, 202611-5013 contacts →

Partial evidence

“Wahl-Larsen Advokatfirma AS is a law firm centrally situated in Oslo, founded in 1874.”

Source: RevenueBase Database · checked Sep 21, 2026
13Partial evidenceTromsø, NorwayHQ checked Sep 21, 202611-5012 contacts →

Partial evidence

“Advokatfirmaet Østgård DA offers legal advice, mainly to small and medium sized businesses and public sector in Nothern Norway.”

Source: RevenueBase Database · checked Sep 21, 2026
14Indirect evidenceSogndal, NorwayHQ checked Sep 21, 202611-5012 contacts →

Indirect evidence

“Advokatfirmaet Tollefsen starta i 1990 som eit enkeltmannsforetak i kontorfellesskap med 2 andre advokatar.”

Source: RevenueBase Database · checked Sep 21, 2026
15Partial evidenceBergen, NorwayHQ checked Sep 21, 20261-109 contacts →

Partial evidence

“The law firm HOFFMANN THINN assists clients in a wide range of business areas.”

Source: RevenueBase Database · checked Sep 21, 2026
16Indirect evidenceLysaker, NorwayHQ checked Sep 21, 202611-508 contacts →

Indirect evidence

“Advokatfirmaet Frøy holder til sentralt på Lysaker, tett på vår lokalregion Asker og Bærum.”

Source: RevenueBase Database · checked Sep 21, 2026
17Indirect evidenceBergen, NorwayHQ checked Sep 21, 20261-105 contacts →

Indirect evidence

“Rådgivning | Transaksjoner | Prosedyre”

Source: RevenueBase Database · checked Sep 21, 2026
18Indirect evidenceStavanger, NorwayHQ checked Sep 21, 20261-105 contacts →

Indirect evidence

“Tubular cutters”

Source: RevenueBase Database · checked Sep 21, 2026
19Indirect evidenceJæren, NorwayHQ checked Sep 21, 20261-105 contacts →

Indirect evidence

“God advokathjelp krever inngående fagkompetanse, bransjeforståelse og et nært samspill med kunden.”

Source: RevenueBase Database · checked Sep 21, 2026
20Indirect evidenceStavanger, NorwayHQ checked Sep 21, 202611-505 contacts →

Indirect evidence

“Advokatfirma Tingmann AS (formerly Advokatfirma Helliesen & CO AS) has been located in Stavanger, Norway since the 1950s.”

Source: RevenueBase Database · checked Sep 21, 2026
21Indirect evidenceNorwayHQ checked Sep 21, 202651-2005 contacts →

Indirect evidence

“Bull was founded in 1864.”

Source: RevenueBase Database · checked Sep 21, 2026
22Indirect evidenceTromsø, NorwayHQ checked Sep 21, 202611-505 contacts →

Indirect evidence

“Advokatfirmaet Rekve Pleym er ett av de ledende advokatfirmaene i Nord-Norge.”

Source: RevenueBase Database · checked Sep 21, 2026
23Indirect evidenceDrammen, NorwayHQ checked Sep 21, 20261-103 contacts →

Indirect evidence

“Advokatfirmaet Kildebo AS driver advokatvirksomhet med hovedvekt på entrepriserett, offentlige anskaffelser, plan- og bygningsrett og fast eiendom, og har hovedsakelig oppdrag for…”

Source: RevenueBase Database · checked Sep 21, 2026
24Indirect evidenceKristiansand, NorwayHQ checked Sep 21, 202611-503 contacts →

Indirect evidence

“ADVOKATFIRMAET KJÆR DA er et tradisjonsrikt advokatfirma med regional forankring som tilbyr spesialiserte tjenester innenfor særlig områdene fast eiendom, entreprise…”

Source: RevenueBase Database · checked Sep 21, 2026
25Indirect evidenceOslo, NorwayHQ checked Sep 21, 20261-102 contacts →

Indirect evidence

“Hjelseth Advokatfirma hjelper private selskaper og personer med juridiske problemstillinger i nærings- og arbeidslivet.”

Source: RevenueBase Database · checked Sep 21, 2026

Showing 25 of 48 energy sector law firms based in Norway

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Energy sector law firms based in Norway at a glance

As of Sep 21, 2026
41.2%Verified-email coverage
27.6Average contacts per company
1-10Median size (employees)
37.5%Largest-city concentration · Oslo
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
25
11-50
17
51-200
3
201-500
3

Email recency for this list is measured worldwide rather than for Norway, so it is reported there. Company counts and contact totals on this page are exact for Norway, over 48 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among energy sector law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Norway whose own description of what they do matches “energy sector law firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names energy sector law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among energy sector law firms, and records with no verified work email. Companies headquartered outside Norway are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 546 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names energy sector law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many energy sector law firms are there based in Norway?

RevenueBase identified 48 energy sector law firms headquartered in Norway as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Wiersholm, headquartered in Oslo, tops this list with the largest team on record.

Which city has the most energy sector law firms?

Oslo leads with 18 headquartered companies, followed by Stavanger (4) and Alesund (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 546 verified decision-maker contacts tracked across these 48 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.