Private limited company · Oslo
REVISJONSFIRMAET FLATTUM & CO AS
ActiveAuditing (69.201)
The life line 2009–2026
Operating revenue per year, with recorded events above. As a table
Operating revenue 2025: NOK 37.4m.
Sources: the Register of Company Accounts (company accounts), fetched 15 Nov 2026; the Brønnøysund Register Centre. Each event has the colour of the section it is in.
In brief
REVISJONSFIRMAET FLATTUM & CO AS is a private limited company in Oslo, founded in 2009, in the industry auditing. The chief executive is Thorbjørn Grindhaug, and the chair of the board is Øyvind Baltzersen. In 2025 the company had NOK 37.4m in operating revenue and a net profit of NOK 11.1m. The largest owner is REVISJONSFIRMAET FLATTUM & CO AS with 37.5%.
Put together by Intelligo from the sections below; each figure stands with its source where it belongs.
Overview
§ 01 Latest changes
4 changes, latest 13 Nov 2026
- Number of employees 18 → 19
- Number of employees 17 → 18
- Annual accounts filed 2024 → 2025
- Godkjent årsregnskap
Source: the Brønnøysund Register Centre and Intelligo's own observations, fetched 15 Nov 2026 · All events →
Overview
§ 02 Worth knowing
1 point
- OKEquity ratio 59.6%, above the industry median
Assumed: derived by Intelligo by fixed rules, not a credit rating. How we calculate
Overview
§ 03 Key figures
Revenue NOK 37.4m in 2025
Revenue
NOK 37.4m
+5.0% from 2024
20232025
Operating profit
NOK 10.8m
+6.5% from 2024
20232025
Net profit
NOK 11.1m
+7.8% from 2024
20232025
Equity
NOK 17.6m
−5.5% from 2024
20232025
Source: the Register of Company Accounts, read 15 Nov 2026 · The full accounts →
Finances
§ 04 Where the money comes from and goes
Financial year 2025
Of every krone of operating revenue in 2025:
- Wages and social costs 51%
- Depreciation 1%
- Other operating costs 18%
- Not specified in the source 1%
- Left as operating result 29%
Source: the Register of Company Accounts via areg.no, read 15 Nov 2026
Finances
§ 05 Financial health
Equity ratio 59.6%
- REVISJONSFIRMAET FLATTUM & CO AS, 2025
- Industry median, assumed: NOK 3.9m · 25.2% · 44.5% · +4.9%
Equity NOK 17.6m60% of the assets (NOK 29.6m)
Source: the Register of Company Accounts, read 15 Nov 2026. The median is derived by Intelligo from 477 companies in 69.201 Auditing, not stated by the source.
Finances
§ 06 Accounts
16 years, latest 2025
| NOK 1,000 | 2023–25 | 2025 | 2024 | 2023 |
|---|---|---|---|---|
| Operating revenue | 37,354 | 35,560 | 34,786 | |
| Operating profit | 10,797 | 10,142 | 9,895 | |
| Profit before tax | 11,062 | 10,284 | 10,040 | |
| Net profit | 11,058 | 10,255 | 10,013 | |
| Total assets | 29,570 | 27,725 | 26,295 | |
| Equity | 17,637 | 18,660 | 18,380 | |
| Liabilities | 11,933 | 9,065 | 7,915 |
Source: the Register of Company Accounts, read 15 Nov 2026 · All 16 years →
Management and ownership
§ 07 Officers
5 officers now
- LARS HARALD BRINCHMANNAuditor since 2011
- Thorbjørn GrindhaugChief executive since 2021
- Øyvind BaltzersenChair of the board since 2024
- Thorbjørn GrindhaugBoard member since 2019
- Eirik SkjølbergBoard member since 2024
Source: the Brønnøysund Register Centre, read 22 Oct 2026 · All 5 roles, former ones too →
Management and ownership
§ 08 Signature, procuration and authorisations
Styrets leder alene. Daglig leder alene.
May sign for the company:
Styrets leder alene. Daglig leder alene.
Procuration: none registered.
The board has no authorisation in force now.
The signature is word for word from the register. Source: the Register of Business Enterprises, read 1 Oct 2026
Management and ownership
§ 09 Owners
1 shareholder · largest 37.5%
| Owner | Share |
|---|---|
| REVISJONSFIRMAET FLATTUM & CO AS | 37.5% |
Source: the Tax Administration's Register of Shareholders as of 31 December 2025, read 31 Jul 2026 · All 1 owners →
Management and ownership
§ 10 Group
1 subsidiary
Share held. Source: the Tax Administration's shareholder register, fetched 31 Jul 2026 · The whole group →
Management and ownership
§ 11 Portfolio
Holds shares in 1 company
Source: the Tax Administration's Register of Shareholders, read 31 Jul 2026 · The whole portfolio →
Management and ownership
§ 12 Network
52 connections
- Person
- Company
3 people link REVISJONSFIRMAET FLATTUM & CO AS to 49 other companies: Øyvind Baltzersen 44, Thorbjørn Grindhaug 6 and Eirik Skjølberg 1.
Source: the Brønnøysund Register Centre, read 22 Oct 2026 · Explore the network →
Events and registers
§ 13 Events
32 since 2015
Events per year
20152026
Since 2015: 40 announcements, 4 register changes and 1 new and 0 former owners. Most happened in 2024 and 2026.
Source: the announcements of the Brønnøysund Register Centre, the Tax Administration's Register of Shareholders, Doffin, TED and NAV, read 2 Nov 2026. Register changes are Intelligo's own observations. · All 32 events →
Events and registers
§ 14 Notices
40, latest 11 Aug 2026
- Godkjente årsregnskap
- Fusjonsbeslutning
- Godkjente årsregnskap
Source: The Brønnøysund Register Centre's announcements ↗, read 2 Nov 2026 · All 40 →
Events and registers
§ 15 Charges
Not fetched yet
Events and registers
§ 16 Other registers
Found in 4 of 7
- The Central Coordinating RegisterRegistered 30 Dec 2009
- VATRegistered
- The Register of Business EnterprisesRegistered 30 Dec 2009
- The Cleaning RegisterNot registered
- The Register of Staffing AgenciesNot registered
- Smiley scheme, the Norwegian Food Safety AuthorityNot registered
- The Financial Supervisory Authority's licence registerRegnskapsselskap, Revisjonsselskap
Purpose: Revisjon og rådgivningsvirksomhet, regnskapsføring, samt det som hermed står i forbindelse, herunder deltagelse i andre selskaper med samme eller lignende formål samt investering i aksjer og verdipapirer.
Source: the Brønnøysund Register Centre, the Labour Inspection Authority, the Food Safety Authority and the Financial Supervisory Authority, each on its own, fetched 15 Nov 2026
Market
§ 17 Tenders
None registered
No tenders recorded.No public tenders won, lost or announced, in Doffin or TED. Checked 15 Nov 2026.
Market
§ 18 Vacancies
None registered
No vacancies.No open ads at NAV. Checked 15 Nov 2026.
Market
§ 19 Competitors
Industry code 69.201
The companies most like it:
The selection is Intelligo's, not stated by the source: companies met in tenders and winners of tenders of the same kind, otherwise the same industry code, nearest in place and size. Source: the Brønnøysund Register Centre, Doffin and TED, fetched 15 Nov 2026 · All competitors → · Largest in the industry →
Last
§ 20 Questions and answers
7 questions
- Who is the chief executive of REVISJONSFIRMAET FLATTUM & CO AS?
Thorbjørn Grindhaug, since 2021. § 07 - Who owns REVISJONSFIRMAET FLATTUM & CO AS?
1 shareholder. It is REVISJONSFIRMAET FLATTUM & CO AS with 37.5%. § 09 - What was the revenue in 2025?
NOK 37.4m in the company. § 06 - Who can sign for REVISJONSFIRMAET FLATTUM & CO AS?
Styrets leder alene. Daglig leder alene. § 08 - Who is the auditor?
LARS HARALD BRINCHMANN, from 29 Oct 2011. § 07 - Where is REVISJONSFIRMAET FLATTUM & CO AS based?
St. Olavs gate 25, 0166 Oslo. - When was REVISJONSFIRMAET FLATTUM & CO AS founded?
21 Dec 2009, registered in the Register of Business Enterprises 30 Dec 2009. § 16
The answers come from the sections linked to, with their sources.