Oldest companies still trading in Oslo county
Active companies ranked by incorporation date — oldest first. The incorporation date is missing for some older companies in the register.
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
Incorporated
1
STIFTELSEN OSLO HOSPITAL
org.nr 977125871 · Oslo, Oslo · Active
31 Dec 1538
2
OSLO BAKER- OG KONDITORLAUG
org.nr 995679167 · Oslo, Oslo · Active
30 Jul 1701
3
AKERSHUS STIFTS GEISTLIGE ENKEKASSE STI
org.nr 840934322 · Oslo, Oslo · Active
29 Dec 1732
4
OSLO GULLSMEDLAUG
org.nr 819814112 · Oslo, Oslo · Active
1 Jan 1753
5
STIFTELSEN CHRISTIANIA OPFOSTRINGSHUS
org.nr 975623343 · Oslo, Oslo · Active
3 Dec 1783
6
BØDAL SAMEIGE
org.nr 875566482 · Oslo, Oslo · Active
31 Dec 1799
7
AKERS SOGNESELSKAP
org.nr 995139340 · Oslo, Oslo · Active
4 Jun 1807
8
SELSKABET FOR OSLO BYES VEL
org.nr 976390237 · Oslo, Oslo · Active
29 May 1811
9
DET NORSKE STUDENTERSAMFUND
org.nr 945696923 · Oslo, Oslo · Active
2 Oct 1813
10
DET NORSKE BIBELSELSKAP STI
org.nr 935570212 · Oslo, Oslo · Active
26 May 1816
11
NORSKE SELSKAB
org.nr 971424079 · Oslo, Oslo · Active
31 Dec 1818
12
OSLO MILITÆRE SAMFUND
org.nr 941324649 · Oslo, Oslo · Active
1 Mar 1825
13
T THOMMESEN & SØN ANS
org.nr 965593772 · Oslo, Oslo · Active
23 May 1832
14
DET NORSKE MEDICINSKE SELSKAB
org.nr 971480521 · Oslo, Oslo · Active
31 Dec 1833
15
TEATER NEUF - STUDENTTEATRET I OSLO
org.nr 995143496 · Oslo, Oslo · Active
21 Nov 1834
16
OSLO KUNSTFORENING
org.nr 971526343 · Oslo, Oslo · Active
13 Nov 1836
17
OSLO HÅNDVERKS- OG INDUSTRIFORENING
org.nr 940472784 · Oslo, Oslo · Active
8 Nov 1838
18
FILOLOGISK FORENING
org.nr 981905199 · Oslo, Oslo · Active
31 Dec 1840
19
OSLO HANDELSSTANDS FORENING
org.nr 938092249 · Oslo, Oslo · Active
12 Nov 1841
20
FRIMURERNES SANGFORENING, OSLO
org.nr 918744878 · Oslo, Oslo · Active
28 Apr 1842
21
FORTIDSMINNEFORENINGEN
org.nr 970167994 · Oslo, Oslo · Active
16 Dec 1844
22
NORGES MØBELTAPETSERER- OG SALMAKERLAUG
org.nr 996259102 · Oslo, Oslo · Active
31 Dec 1844
23
OSLO MALERMESTERLAUG
org.nr 970168532 · Oslo, Oslo · Active
9 May 1845
24
DEN NORSKE STUDENTERSANGFORENING
org.nr 977255848 · Oslo, Oslo · Active
10 Jul 1845
25
OSLO HÅNDVERKER SANGFORENING
org.nr 986133801 · Oslo, Oslo · Active
7 Nov 1845
26
NORDEA IDRETTSLAG OSLO
org.nr 985596174 · Oslo, Oslo · Active
2 May 1848
27
KUNSTNERFORENINGEN
org.nr 975504247 · Oslo, Oslo · Active
31 Dec 1849
28
POLYTEKNISK FORENING
org.nr 940702704 · Oslo, Oslo · Active
23 Jun 1852
29
REVIERHAVNENS BAATFORENING
org.nr 974535483 · Oslo, Oslo · Active
28 Apr 1853
30
STIFTELSEN KIRKENS BYMISJON
org.nr 944384448 · Oslo, Oslo · Active
1 Jan 1855
31
OSLO TURNFORENING
org.nr 946722189 · Oslo, Oslo · Active
13 Apr 1855
32
DET NORSKE VIDENSKAPSAKADEMI
org.nr 971089601 · Oslo, Oslo · Active
3 May 1857
33
GJENSIDIGE NORGE AS
org.nr 914742277 · Oslo, Oslo · Active
9 May 1857
34
NORGES FARMACEUTISKE FORENING
org.nr 970168516 · Oslo, Oslo · Active
2 Nov 1858
35
FELLESLEGAT TIL FORENINGEN FOR BLINDE STI
org.nr 977122813 · Oslo, Oslo · Active
31 Dec 1858
36
NYDALENS SANGFORENING
org.nr 826486112 · Oslo, Oslo · Active
31 Dec 1858
37
REALISTFORENINGEN
org.nr 974454785 · Oslo, Oslo · Active
18 Apr 1859
38
DYREBESKYTTELSEN NORGE
org.nr 971277475 · Oslo, Oslo · Active
31 Dec 1859
39
STIFTELSEN DYREBESKYTTELSEN NORGE
org.nr 977036658 · Oslo, Oslo · Active
31 Dec 1859
40
JØRGEN BREDER OG HUSTRUS LEGAT STI
org.nr 979251386 · Oslo, Oslo · Active
12 Apr 1861
41
OSLO ARBEIDERSAMFUNN
org.nr 974338238 · Oslo, Oslo · Active
17 Feb 1864
42
OSLO SKØITEKLUB
org.nr 983831451 · Oslo, Oslo · Active
18 Feb 1864
43
FORENINGEN ANDVAKE
org.nr 812284142 · Oslo, Oslo · Active
8 Oct 1864
44
STUDIEFORBUNDET LIVSLANG LÆRING
org.nr 971436891 · Oslo, Oslo · Active
29 Oct 1864
45
METODISTKIRKEN I NORGE, GRÜNERLØKKA MENIGHET
org.nr 996353559 · Oslo, Oslo · Active
2 Jan 1865
46
NORGES RØDE KORS
org.nr 864139442 · Oslo, Oslo · Active
22 Sep 1865
47
OSLO RØDE KORS
org.nr 961847818 · Oslo, Oslo · Active
4 Nov 1865
48
KATTATEATERET
org.nr 986062211 · Oslo, Oslo · Active
31 Dec 1869
49
DEN NORSKE HISTORISKE FORENING
org.nr 975578852 · Oslo, Oslo · Active
31 Dec 1869
50
OSLO KFUM
org.nr 970013628 · Oslo, Oslo · Active
31 Dec 1869
51
HIFO ØSTLANDET
org.nr 919519703 · Oslo, Oslo · Active
31 Dec 1869
52
FET SPAREFORENING AS
org.nr 911617919 · Oslo, Oslo · Active
1 Jan 1870
53
MOSS BRUKSEIERFORENING
org.nr 970199888 · Oslo, Oslo · Active
1 Jan 1870
54
OSLO DAMEKOR
org.nr 981621093 · Oslo, Oslo · Active
3 Dec 1870
55
OSLO JEGER- OG FISKERFORENING
org.nr 995753383 · Oslo, Oslo · Active
10 Feb 1871
56
AKERSGATA 18 AS
org.nr 921111347 · Oslo, Oslo · Active
9 Mar 1872
57
FELLESFORBUNDET AVD 850 OSLO GRAFISKE FAGFORENING
org.nr 943802246 · Oslo, Oslo · Active
23 Jul 1872
58
DE NORDISKE JURISTMØTER NORGE
org.nr 981950585 · Oslo, Oslo · Active
31 Dec 1872
59
FORENEDE INDUSTRIER AS (FORINA)
org.nr 911757796 · Oslo, Oslo · Active
1 Jan 1874
60
TEKNA-TEKNISK-NATURVITENSKAPELIG FORENING
org.nr 971420782 · Oslo, Oslo · Active
9 Dec 1874
61
TEKNA OSLO AVDELING
org.nr 864812392 · Oslo, Oslo · Active
9 Dec 1874
62
STIFTELSEN STUDENTERHJEMMET AV 1875
org.nr 961172861 · Oslo, Oslo · Active
12 Feb 1875
63
KUNSTINDUSTRIMUSEET I OSLO STI
org.nr 970956034 · Oslo, Oslo · Active
25 Mar 1876
64
OSLO BAKER OG KONDITORFORENING
org.nr 978646247 · Oslo, Oslo · Active
26 Mar 1876
65
FORENINGEN TIL BARNS BEKLÆDNING
org.nr 981923545 · Oslo, Oslo · Active
14 Dec 1876
66
CHRISTIANIA SKIKLUB
org.nr 994195654 · Oslo, Oslo · Active
17 Feb 1877
67
DEN EVANGELISK LUTHERSKE FRIKIRKE
org.nr 963558406 · Oslo, Oslo · Active
6 May 1877
68
BAPTISTKIRKEN NORGE
org.nr 870262272 · Oslo, Oslo · Active
6 Jul 1877
69
OSLO MISJONSKIRKE BETLEHEM
org.nr 971435453 · Oslo, Oslo · Active
23 Sep 1877
70
RYENBERGET MENIGHET - DET EVANGELISK-LUTHERSKE KIRKESAMFUNN
org.nr 989141074 · Oslo, Oslo · Active
31 Dec 1877
71
ADVOKATFIRMAET NORMAN & CO ANS
org.nr 954580881 · Oslo, Oslo · Active
27 Mar 1878
72
DEN EVANGELISK LUTHERSKE FRIKIRKE OSLO ØSTRE MENIGHET
org.nr 976723724 · Oslo, Oslo · Active
31 Mar 1878
73
CHRISTIANIA ROKLUB
org.nr 979251408 · Oslo, Oslo · Active
15 May 1878
74
IOGT I NORGE
org.nr 966804130 · Oslo, Oslo · Active
14 Jun 1878
75
DET NORSKE TRAVSELSKAP
org.nr 957524524 · Oslo, Oslo · Active
30 Jun 1878
76
NORGES DØVEFORBUND OSLO
org.nr 971525088 · Oslo, Oslo · Active
17 Nov 1878
77
SYVENDEDAGS ADVENTISTKIRKEN - BETEL MENIGHET
org.nr 978702678 · Oslo, Oslo · Active
11 Jan 1879
78
OSLO SELSKAB
org.nr 916698240 · Oslo, Oslo · Active
31 Mar 1879
79
LOSJE RECHABS MINDE
org.nr 983867936 · Oslo, Oslo · Active
24 Nov 1879
80
CÆCILIAFORENINGEN
org.nr 975506177 · Oslo, Oslo · Active
31 Dec 1879
81
OSLO MASKINISTFORENING
org.nr 971524723 · Oslo, Oslo · Active
29 Jan 1880
82
VESTRE ARBEIDERSAMFUNN
org.nr 984061935 · Oslo, Oslo · Active
30 Apr 1880
83
VIKEN VENSTRE
org.nr 913391071 · Oslo, Oslo · Active
30 Apr 1880
84
DAVID GRAAHS LEGAT TIL FRIMURERLOSJEN STI
org.nr 979453175 · Oslo, Oslo · Active
11 Aug 1880
85
APOTEKFORENINGEN
org.nr 971033541 · Oslo, Oslo · Active
16 May 1881
86
STIFTELSEN CHRISTIAN RADICH
org.nr 977262992 · Oslo, Oslo · Active
7 Jun 1881
87
BRITISH AMERICAN TOBACCO KLUBBEN
org.nr 989350196 · Oslo, Oslo · Active
16 Aug 1881
88
THE ANGLICAN CHAPLAINCY IN NORWAY
org.nr 975940608 · Oslo, Oslo · Active
16 Nov 1881
89
NORMISJON REGION ØST
org.nr 970353739 · Oslo, Oslo · Active
29 Dec 1881
90
OSLOSTUDENTENES IDRETTSKLUBB
org.nr 877252892 · Oslo, Oslo · Active
16 Sep 1882
91
DEN DANSKE FORENING I OSLO
org.nr 919150629 · Oslo, Oslo · Active
1 Oct 1882
92
FELLESFORBUNDET AVD 600 BYGNINGSARBEIDERNES FAGFORENING
org.nr 871097682 · Oslo, Oslo · Active
4 Nov 1882
93
KAVALERIKLUBBEN
org.nr 992673699 · Oslo, Oslo · Active
31 Dec 1882
94
TELELAGET I OSLO
org.nr 993913308 · Oslo, Oslo · Active
1 Jan 1883
95
SKIFORENINGEN - FORENINGEN TIL SKI-IDRETTENS FREMME
org.nr 946175986 · Oslo, Oslo · Active
4 Jan 1883
96
ASKER VENSTRE
org.nr 998296846 · Oslo, Oslo · Active
28 Jan 1883
97
SKIKLUBBEN ULL
org.nr 985312109 · Oslo, Oslo · Active
29 Jan 1883
98
OSLO ØSTRE SKYTTERLAG
org.nr 979252668 · Oslo, Oslo · Active
3 Feb 1883
99
KONGELIG NORSK SEILFORENING
org.nr 970193634 · Oslo, Oslo · Active
7 Feb 1883
100
ORMSUND ROKLUB
org.nr 983796621 · Oslo, Oslo · Active
21 Jul 1883
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Source
Biztrac.no · Data from the Brønnøysund Register Centre and the Norwegian Tax Administration · Last updated 15.06.2026.
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.