Company lists · Data verified August 2026

Top 25 Environmental law firms based in Norway

Name: Environmental law firms based in Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 36 companies tracked

There are 36 environmental law firms headquartered in Norway (RevenueBase, August 2026). RevenueBase tracks 806 professional contacts across them, including 268 with verified work emails and 28 with mobile numbers. Oslo is the largest hub.

This list covers environmental law firms headquartered in Norway, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

36Companies

806Contacts tracked

268Verified emails

28Mobile numbers

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The 25 largest environmental law firms based in Norway

Ranked by team size

Top 25 of 36 environmental law firms based in Norway, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Wiersholm	Oslo	201-500	340	145
2	Advokatfirmaet Hjort	Oslo	51-200	132	17
3	Advokatfirmaet Dehn	Sandvika	11-50	27	18
4	AGP Advokater	Oslo	11-50	24	18
5	Advokatfirmaet Lund & CO DA	Oslo	11-50	23	6
6	Kogstad Lunde & CO	Oslo	11-50	16	6
7	Dæhlin Sand Advokatfirma	Oslo	1-10	14	8
8	Wahl-Larsen Advokatfirma AS	Oslo	11-50	13	10
9	Advokatfirmaet Mageli DA	Hamar	11-50	13	1
10	Advokatfirmaet Østgård DA	Tromso	11-50	12	8
11	Advokatfirmaet Tollefsen AS	Sogndal	11-50	11	5
12	Advokatfirmaet Robertsen AS	Oslo	11-50	10	1
13	Advokatfirmaet Frøy AS	Lysaker	11-50	8	1
14	Garmann Mitchell & CO	Oslo	1-10	5	5
15	Bjørnsen Advokatfirma	Bryne	1-10	5	3
16	Advokatfirmaet Rekve, Pleym & CO DA	Tromso	11-50	5	1
17	Advokatfirmaet Bjørge-Skaaraas & CO AS	Sarpsborg Viken	1-10	3	2
18	YM Consult AS	Oslo	1-10	2	2
19	MH Partners Advokatfirma	Bergen	1-10	2	2
20	Hjelseth Advokatfirma	Oslo	1-10	2	2
21	Saag Advokatfirma AS	Fornebu Fornebu	1-10	2	1
22	1,5 Advokatfirma AS	Koppang	1-10	2	1
23	Advokatfirmaet Judicia DA	Alesund	11-50	1	1
24	Advokatfirmaet Ulset	Oslo	1-10	1	1
25	Advokatfirmaet Opøien MNA	Oslo	1-10	1	1

Showing 25 of 36 environmental law firms based in Norway

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Environmental law firms based in Norway at a glance

As of Aug 28, 2026

1-10Median size (employees)

OsloLargest hub · 18 HQs

28Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Environmental law firms by metro

Metro	Companies
Environmental law firms in Oslo	18
Environmental law firms in Alesund	3
Environmental law firms in Tromso	2
Environmental law firms in Bergen	1
Environmental law firms in Koppang	1
Environmental law firms in Sandvika	1
Environmental law firms in Fornebu Fornebu	1

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “environmental law firms”, with match quality audited by blind human judging, and headquartered in Norway.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many environmental law firms are there based in Norway?

There are 36 environmental law firms headquartered in Norway as of August 2026 (RevenueBase).

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 environmental law firms?

Oslo leads with 18 headquartered companies, followed by Alesund (3) and Tromso (2).

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 268 verified decision-maker contacts tracked across these 36 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.