Company lists · Data verified August 2026

Top 19 Accounting firms for international nonprofits based in Oslo, Norway

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 48 companies tracked

There are 48 accounting firms for international nonprofits headquartered in Oslo, Norway (RevenueBase, August 2026). RevenueBase tracks 1,936 professional contacts across them, including 837 with verified work emails and 59 with mobile numbers. Oslo is the largest hub.

This list covers accounting firms for international nonprofits 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.

48Companies

1,936Contacts tracked

837Verified emails

59Mobile numbers

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The 19 largest accounting firms for international nonprofits based in Oslo, Norway

Ranked by team size

Top 19 of 48 accounting firms for international nonprofits 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	BDO Norge	Oslo	1,001-5,000	1,538	721
2	Forvis Mazars In Norway	Oslo	51-200	76	36
3	PKF Revisjon AS	Oslo	11-50	29	23
4	Langseth Gruppen	Oslo	11-50	21	4
5	Millor	Oslo	1-10	16	5
6	Revisjonsfirmaet Flattum & CO AS	Oslo	11-50	15	5
7	Baker Tilly Grimsrud & CO	Oslo	11-50	15	1
8	Unic Revisjon AS	Oslo	11-50	12	8
9	Alpha Revisjon AS	Oslo	11-50	11	9
10	Safe Accounting	Oslo	1-10	11	2
11	To Streker Økonomi AS	Oslo	1-10	8	7
12	Balanco Accounting AS	Oslo	1-10	8	5
13	Regnskap Group AS	Oslo	1-10	4	4
14	Numetric AS	Oslo	1-10	2	2
15	Kunst & Kultur Regnskap AS	Oslo	1-10	2	1
16	Thune Økonomistyring AS	Oslo	1-10	2	1
17	LEO Revisjon DA	Oslo	1-10	2	1
18	Regnskapssystemer AS	Oslo	1-10	2	1
19	Kristoffersen & Berg AS	Oslo	1-10	2	1

Showing 19 of 48 accounting firms for international nonprofits based in Oslo, Norway

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Accounting firms for international nonprofits based in Oslo, Norway at a glance

As of Aug 28, 2026

1-10Median size (employees)

OsloLargest hub · 48 HQs

59Contacts with mobile numbers

7Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Accounting firms for international nonprofits by metro in Norway

Metro	Companies
Accounting firms for international nonprofits in Oslo	48
Accounting firms for international nonprofits in Stavanger	6
Accounting firms for international nonprofits in Kristiansand	6
Accounting firms for international nonprofits in Alesund	5
Accounting firms for international nonprofits in Sandefjord	5
Accounting firms for international nonprofits in Drammen	5
Accounting firms for international nonprofits in Tonsberg	5

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 for international nonprofits”, 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 for international nonprofits are there based in Oslo, Norway?

There are 48 accounting firms for international nonprofits headquartered in Oslo, Norway as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most accounting firms for international nonprofits?

Oslo leads with 48 headquartered companies, followed by Stavanger (6) and Kristiansand (6).

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 837 verified decision-maker contacts tracked across these 48 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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Related lists

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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.