Company lists · Data verified August 2026

Top 25 Accounting firms based in Oslo, Norway

Name: Accounting firms based in Oslo, Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 125 companies tracked

There are 125 accounting firms headquartered in Oslo, Norway (RevenueBase, August 2026). RevenueBase tracks 4,353 professional contacts across them, including 992 with verified work emails and 137 with mobile numbers. Oslo is the largest hub.

This list covers accounting firms headquartered in Oslo, 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.

125Companies

4,353Contacts tracked

992Verified emails

137Mobile numbers

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The 25 largest accounting firms based in Oslo, Norway

Ranked by team size

Top 25 of 125 accounting firms based in Oslo, 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	PWC Norway	Oslo	1,001-5,000	1,823	1
2	BDO Norge	Oslo	1,001-5,000	1,538	721
3	Forvis Mazars In Norway	Oslo	51-200	76	36
4	Regnskap Norge	Oslo	11-50	75	28
5	PKF Revisjon AS	Oslo	11-50	29	23
6	Econpartner AS	Oslo	11-50	27	19
7	Langseth Gruppen	Oslo	11-50	21	4
8	Varder	Oslo	11-50	18	2
9	Millor	Oslo	1-10	16	5
10	MTA Group AS	Oslo	1-10	15	11
11	Revisjonsfirmaet Flattum & CO AS	Oslo	11-50	15	5
12	Baker Tilly Grimsrud & CO	Oslo	11-50	15	1
13	Gerhard & Sønn	Oslo	11-50	14	9
14	Unic Revisjon AS	Oslo	11-50	12	8
15	Randi Regnskap	Oslo	1-10	12	6
16	Amon Regnskap Oslo AS	Oslo	1-10	12	3
17	Alpha Revisjon AS	Oslo	11-50	11	9
18	Safe Accounting	Oslo	1-10	11	2
19	Regnskapshuset AS	Oslo	11-50	10	4
20	Norsk Regnskap	Oslo	11-50	9	6
21	Axera Business Management AS	Oslo	11-50	9	2
22	Berge & Lundal Revisjonsselskap	Oslo	11-50	8	7
23	To Streker Økonomi AS	Oslo	1-10	8	7
24	Revisorgruppen AS	Oslo	51-200	8	5
25	Balanco Accounting AS	Oslo	1-10	8	5

Showing 25 of 125 accounting firms based in Oslo, Norway

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Accounting firms based in Oslo, Norway at a glance

As of Aug 28, 2026

1-10Median size (employees)

OsloLargest hub · 125 HQs

137Contacts with mobile numbers

7Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Accounting firms by metro in Norway

Metro	Companies
Accounting firms in Oslo	125
Accounting firms in Trondheim	21
Accounting firms in Bergen	14
Accounting firms in Stavanger	14
Accounting firms in Sandnes	13
Accounting firms in Sandefjord	12
Accounting firms in Drammen	11

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 “accounting firms”, with match quality audited by blind human judging, and headquartered in Oslo, 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; 7 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 accounting firms are there based in Oslo, Norway?

There are 125 accounting firms headquartered in Oslo, Norway as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most accounting firms?

Oslo leads with 125 headquartered companies, followed by Trondheim (21) and Bergen (14).

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 992 verified decision-maker contacts tracked across these 125 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.