Largest employers by headcount in Oslo county
Ranked by registered headcount.
Together the 100 companies on this list account for 368,459. Top of the list is OSLO UNIVERSITETSSYKEHUS HF with 26,487, ahead of OSLO KOMMUNE UTDANNINGSETATEN. The largest industry is regulation of health care, education, cultural services and other social services, with 16 companies.
Largest by revenue
Most profitable
Highest operating margin
Revenue per employee
Operating profit per employee
Payroll cost per employee
Largest equity
Largest groups
Largest employers
Newly registered companies
Oldest companies
#
Company
Employees
1
OSLO UNIVERSITETSSYKEHUS HF
org.nr 993467049 · Oslo, Oslo · Active
26,487
2
OSLO KOMMUNE UTDANNINGSETATEN
org.nr 976820037 · Oslo, Oslo · Active
23,846
3
FORSVARET
org.nr 986105174 · Oslo, Oslo · Active
23,152
4
POSTEN BRING AS
org.nr 984661185 · Oslo, Oslo · Active
9,958
5
UNIVERSITETET I OSLO
org.nr 971035854 · Oslo, Oslo · Active
9,039
6
BARNE-, UNGDOMS- OG FAMILIEDIREKTORATET
org.nr 986128433 · Oslo, Oslo · Active
7,378
7
DNB BANK ASA
org.nr 984851006 · Oslo, Oslo · Active
7,353
8
ISS FACILITY SERVICES AS
org.nr 914791723 · Oslo, Oslo · Active
7,322
9
SKATTEETATEN
org.nr 974761076 · Oslo, Oslo · Active
7,292
10
AKERSHUS FYLKESKOMMUNE
org.nr 930580783 · Oslo, Oslo · Active
7,016
11
VY BUSS AS
org.nr 976948394 · Oslo, Oslo · Active
6,384
12
BANE NOR SF
org.nr 917082308 · Oslo, Oslo · Active
5,637
13
SCANDIC HOTELS AS
org.nr 953149117 · Oslo, Oslo · Active
5,500
14
STATENS VEGVESEN
org.nr 971032081 · Oslo, Oslo · Active
5,360
15
MANPOWER AS
org.nr 920968201 · Oslo, Oslo · Active
5,356
16
OSLO KOMMUNE SYKEHJEMSETATEN
org.nr 990612498 · Oslo, Oslo · Active
5,313
17
ADECCO NORGE AS
org.nr 935333156 · Oslo, Oslo · Active
5,174
18
TINE SA
org.nr 947942638 · Oslo, Oslo · Active
4,819
19
STENDI AS
org.nr 985194653 · Oslo, Oslo · Active
4,723
20
COMPASS GROUP NORGE AS
org.nr 952507729 · Oslo, Oslo · Active
4,329
21
HYDRO ALUMINIUM AS
org.nr 917537534 · Oslo, Oslo · Active
4,138
22
NORTURA SA
org.nr 938752648 · Oslo, Oslo · Active
4,135
23
NORSK RIKSKRINGKASTING AS
org.nr 976390512 · Oslo, Oslo · Active
4,031
24
4SERVICE EIR RENHOLD AS
org.nr 917719993 · Oslo, Oslo · Active
3,910
25
OSLO POLITIDISTRIKT
org.nr 961398142 · Oslo, Oslo · Active
3,869
26
SATS NORWAY AS
org.nr 892625522 · Oslo, Oslo · Active
3,824
27
NORSK MEDISINALDEPOT AS
org.nr 965336796 · Oslo, Oslo · Active
3,777
28
SOPRA STERIA AS
org.nr 910909088 · Oslo, Oslo · Active
3,671
29
AVARN SECURITY AS
org.nr 943184097 · Oslo, Oslo · Active
3,642
30
JOBZONE NORGE AS
org.nr 983032222 · Oslo, Oslo · Active
3,598
31
OSLOMET - STORBYUNIVERSITETET
org.nr 997058925 · Oslo, Oslo · Active
3,436
32
BRAVIDA NORGE AS
org.nr 987582561 · Oslo, Oslo · Active
3,384
33
MIO BPA AS
org.nr 913961471 · Oslo, Oslo · Active
3,151
34
Aktieselskapet Vinmonopolet
org.nr 817209882 · Oslo, Oslo · Active
2,950
35
PERSONALHUSET STAFFING GROUP AS
org.nr 982742765 · Oslo, Oslo · Active
2,945
36
VEIDEKKE ENTREPRENØR AS
org.nr 984024290 · Oslo, Oslo · Active
2,941
37
SECURITAS AS
org.nr 920144950 · Oslo, Oslo · Active
2,934
38
SKANSKA NORGE AS
org.nr 943049467 · Oslo, Oslo · Active
2,917
39
MULTICONSULT NORGE AS
org.nr 918836519 · Oslo, Oslo · Active
2,880
40
LOVISENBERG DIAKONALE SYKEHUS AS
org.nr 965985166 · Oslo, Oslo · Active
2,818
41
NORDEA BANK ABP NUF
org.nr 920058817 · Oslo, Oslo · Active
2,768
42
NG MENY ØST AS
org.nr 977571340 · Oslo, Oslo · Active
2,742
43
OPTIMERA AS
org.nr 967013056 · Oslo, Oslo · Active
2,661
44
STIFTELSEN KIRKENS BYMISJON
org.nr 944384448 · Oslo, Oslo · Active
2,578
45
FORSVARSBYGG
org.nr 975950662 · Oslo, Oslo · Active
2,542
46
AVINOR AS
org.nr 985198292 · Oslo, Oslo · Active
2,505
47
ELKJØP NORGE AS
org.nr 947054600 · Oslo, Oslo · Active
2,505
48
H & M HENNES & MAURITZ AS
org.nr 912618900 · Oslo, Oslo · Active
2,480
49
VYGRUPPEN AS
org.nr 984661177 · Oslo, Oslo · Active
2,459
50
PRIMA ASSISTANSE AS
org.nr 989748319 · Oslo, Oslo · Active
2,436
51
STATNETT SF
org.nr 962986633 · Oslo, Oslo · Active
2,434
52
FRELSESARMEEN
org.nr 938498318 · Oslo, Oslo · Active
2,420
53
GJENSIDIGE FORSIKRING ASA
org.nr 995568217 · Oslo, Oslo · Active
2,402
54
COLOR LINE CREW AS
org.nr 991779434 · Oslo, Oslo · Active
2,351
55
COOP NORGE SA
org.nr 936560288 · Oslo, Oslo · Active
2,345
56
BOUVET NORGE AS
org.nr 996756246 · Oslo, Oslo · Active
2,270
57
SWECO NORGE AS
org.nr 967032271 · Oslo, Oslo · Active
2,256
58
DIAKONHJEMMET SYKEHUS AS
org.nr 982791952 · Oslo, Oslo · Active
2,241
59
OSLO KOMMUNE BYDEL 13 ØSTENSJØ
org.nr 974778807 · Oslo, Oslo · Active
2,147
60
LOVISENBERG OMSORG AS
org.nr 984328923 · Oslo, Oslo · Active
2,109
61
OSLO KOMMUNE BYDEL 1 GAMLE OSLO
org.nr 974778742 · Oslo, Oslo · Active
2,002
62
OSLO KOMMUNE BYDEL 12 ALNA
org.nr 970534644 · Oslo, Oslo · Active
1,998
63
CLAS OHLSON AS
org.nr 937402198 · Oslo, Oslo · Active
1,984
64
NEXANS NORWAY AS
org.nr 981122607 · Oslo, Oslo · Active
1,980
65
OSLO KOMMUNE BYDEL 8 NORDRE AKER
org.nr 974778882 · Oslo, Oslo · Active
1,965
66
XXL SPORT & VILLMARK AS
org.nr 881932792 · Oslo, Oslo · Active
1,955
67
NAV ARBEID OG YTELSER
org.nr 999263550 · Oslo, Oslo · Active
1,933
68
OSLO KOMMUNE BYDEL 11 STOVNER
org.nr 874778842 · Oslo, Oslo · Active
1,933
69
ARBEIDS- OG VELFERDSETATEN
org.nr 889640782 · Oslo, Oslo · Active
1,932
70
PRICEWATERHOUSECOOPERS AS
org.nr 987009713 · Oslo, Oslo · Active
1,917
71
ATEA AS
org.nr 976239997 · Oslo, Oslo · Active
1,875
72
DEN NORSKE KIRKE
org.nr 818066872 · Oslo, Oslo · Active
1,871
73
UTENRIKSDEPARTEMENTET
org.nr 972417920 · Oslo, Oslo · Active
1,869
74
GK NORGE AS
org.nr 915892981 · Oslo, Oslo · Active
1,854
75
STIFTELSEN HANDELSHØYSKOLEN BI
org.nr 971228865 · Oslo, Oslo · Active
1,847
76
CAVERION NORGE AS
org.nr 959069743 · Oslo, Oslo · Active
1,831
77
OSLO KOMMUNE BYDEL 14 NORDSTRAND
org.nr 970534679 · Oslo, Oslo · Active
1,830
78
OSLO KOMMUNE BYDEL 9 BJERKE
org.nr 974778874 · Oslo, Oslo · Active
1,749
79
OSLO KOMMUNE BYDEL 2 GRUNERLØKKA
org.nr 870534612 · Oslo, Oslo · Active
1,738
80
IF SKADEFORSIKRING NUF
org.nr 981290666 · Oslo, Oslo · Active
1,737
81
TELIA NORGE AS
org.nr 981929055 · Oslo, Oslo · Active
1,730
82
COOR CLEANING CATERING AND PROPERTY AS
org.nr 912523918 · Oslo, Oslo · Active
1,712
83
SATS VEST AS
org.nr 948942003 · Oslo, Oslo · Active
1,680
84
STIFTELSEN KANVAS
org.nr 971272643 · Oslo, Oslo · Active
1,665
85
TOLLETATEN
org.nr 974761343 · Oslo, Oslo · Active
1,644
86
FORSVARSMATERIELL
org.nr 916075855 · Oslo, Oslo · Active
1,631
87
STENDI ASSISTANSE AS
org.nr 918561854 · Oslo, Oslo · Active
1,623
88
VOICE NORGE AS
org.nr 957560199 · Oslo, Oslo · Active
1,621
89
ALLIANCE HEALTHCARE NORGE APOTEKDRIFT AS
org.nr 982547822 · Oslo, Oslo · Active
1,599
90
OSLO KOMMUNE BYDEL 15 SØNDRE NORDSTRAND
org.nr 972408875 · Oslo, Oslo · Active
1,595
91
OSLO KOMMUNE BYDEL 3 SAGENE
org.nr 974778726 · Oslo, Oslo · Active
1,595
92
RADISSON HOTELS NORWAY AS
org.nr 931531018 · Oslo, Oslo · Active
1,565
93
ELKEM ASA
org.nr 911382008 · Oslo, Oslo · Active
1,544
94
MESTA AS
org.nr 992804440 · Oslo, Oslo · Active
1,540
95
STIFTELSEN SIGNO
org.nr 970533427 · Oslo, Oslo · Active
1,522
96
OSLO KOMMUNE VELFERDSETATEN
org.nr 997506413 · Oslo, Oslo · Active
1,510
97
AF GRUPPEN NORGE AS
org.nr 938333572 · Oslo, Oslo · Active
1,492
98
OSLO KOMMUNE BYDEL 10 GRORUD
org.nr 974778866 · Oslo, Oslo · Active
1,481
99
BARNEHAGERESSURSEN AS
org.nr 987250666 · Oslo, Oslo · Active
1,435
100
CIRCLE K DETALJIST AS
org.nr 971128348 · Oslo, Oslo · Active
1,435
Showing 100 companies
Embed this list
Free to use on your own site or in an article – copy the code below. It links back to the source.
Source
Biztrac.no · Data from the Brønnøysund Register Centre and the Norwegian Tax Administration · Last updated 03.10.2026.
The list is ranked on the most recently reported financial figures. See method and caveats below.
These lists show actual registered figures from public sources (the Brønnøysund registers). They are not an assessment of creditworthiness, solidity or suitability as a customer, supplier or investment. Figures are for the most recently reported financial year.