BIZTRAC BETA

Oldest companies still trading in Faglig, vitenskapelig og teknisk tjenesteyting

Active companies ranked by incorporation date — oldest first. The incorporation date is missing for some older companies in the register.

Top of the list is DET KONGELIGE SELSKAP FOR NORGES VEL with 29 Dec 1809, ahead of DET NORSKE MEDICINSKE SELSKAB. Oslo has the most companies on the list (34).

# Company Incorporated
1 DET KONGELIGE SELSKAP FOR NORGES VEL org.nr 965208739 · Lillestrøm, Akershus · Active 29 Dec 1809 2 DET NORSKE MEDICINSKE SELSKAB org.nr 971480521 · Oslo, Oslo · Active 31 Dec 1833 3 KRISTIANSAND HÅNDVERKERFORENING BA org.nr 976189930 · Kristiansand, Agder · Active 19 Sep 1847 4 ADVOKATFIRMAET NORMAN & CO ANS org.nr 954580881 · Oslo, Oslo · Active 27 Mar 1878 5 JOH JOHANNSON org.nr 850173192 · Oslo, Oslo · Active 11 Aug 1891 6 OSLO FOTOGRAFLAUG org.nr 912613054 · Oslo, Oslo · Active 6 Dec 1894 7 AS DEN NORSKE REISEEFFEKTFABRIK org.nr 911170035 · Halden, Østfold · Active 4 Feb 1898 8 MYHRE KONSULENT AS org.nr 917203105 · Bærum, Akershus · Active 23 Oct 1901 9 AKSJESELSKAPET CENTRALTRYKKERIET INVEST org.nr 911012391 · Lier, Buskerud · Active 9 Apr 1906 10 REACH SUBSEA ASA org.nr 922493626 · Haugesund, Rogaland · Active 19 Aug 1909 11 NORSK ENERGI org.nr 945469277 · Oslo, Oslo · Active 16 Mar 1916 12 DAMPSKIBSAKTIESELSKABET THEOLOGOS AS org.nr 930572365 · Oslo, Oslo · Active 22 Feb 1917 13 WESMANS AS org.nr 931497693 · Moss, Østfold · Active 19 Jul 1917 14 DYNATEC ENGINEERING AS org.nr 915223818 · Indre Østfold, Østfold · Active 31 Oct 1917 15 CREDITREFORM HOLDING AS org.nr 911167638 · Trondheim, Trøndelag · Active 8 Dec 1919 16 DEN NORSKE KONFECTIONÆR AS org.nr 934532406 · Bærum, Akershus · Active 2 Feb 1920 17 AKERSHUS GRUNNEIERLAG SA org.nr 911960656 · Nes, Akershus · Active 8 Apr 1920 18 INSTITUTTET FOR SAMMENLIGNENDE KULTURFORSKNING STI org.nr 979643470 · Oslo, Oslo · Active 10 Oct 1922 19 BERGENS REVISORFORENING org.nr 979112807 · · Active 8 Oct 1924 20 LEIV ENGELSCHIØN AS org.nr 911447630 · Asker, Akershus · Active 17 Jan 1927 21 RAKKESTAD HANDELSTAND SA org.nr 970247653 · Rakkestad, Østfold · Active 18 Jan 1927 22 SPORVEIEN MEDIA AS org.nr 916163819 · Oslo, Oslo · Active 8 Mar 1927 23 H & T LANGVA AS org.nr 830114602 · Stavanger, Rogaland · Active 20 May 1927 24 DF WIIG AS org.nr 913863186 · Bergen, Vestland · Active 16 Oct 1929 25 RASMUSSENGRUPPEN AS org.nr 929477545 · Kristiansand, Agder · Active 13 Nov 1929 26 CHR MICHELSENS INSTITUTT FOR VIDENSKAP OG ÅNDSFRIHET STI org.nr 948271788 · Bergen, Vestland · Active 15 Mar 1930 27 OBOS PROSJEKT AS org.nr 931536532 · Oslo, Oslo · Active 2 Jun 1930 28 SØRSKÅR BEDEHUS org.nr 984046200 · Strand, Rogaland · Active 20 Nov 1932 29 STURLASON AS POLYFOTO org.nr 915228887 · Oslo, Oslo · Active 20 Oct 1933 30 ARNESEN CHRISTENSEN & CO AS org.nr 910271857 · Oslo, Oslo · Active 27 Oct 1933 31 KONGSHAVN REGNSKAP AS org.nr 822496822 · Haugesund, Rogaland · Active 20 Jun 1934 32 AS APOTEKERNES HUS org.nr 930713384 · Oslo, Oslo · Active 27 Sep 1934 33 MOBUKO AS org.nr 914790484 · Asker, Akershus · Active 22 Jan 1935 34 INICIUM AS org.nr 817391192 · Oslo, Oslo · Active 31 May 1937 35 NORDIC MARINE SOLUTIONS AS org.nr 814784142 · Oslo, Oslo · Active 11 Jun 1937 36 THAU REKLAMEBYRÅ AS org.nr 916692986 · Asker, Akershus · Active 28 Sep 1937 37 AS QUATRO org.nr 917742049 · Oslo, Oslo · Active 2 May 1938 38 NORSK CASIRAS AS org.nr 914767334 · Oslo, Oslo · Active 24 Jun 1938 39 DS AS FORTO org.nr 930252344 · Bergen, Vestland · Active 22 Nov 1938 40 AS PULP SERVICE org.nr 915255191 · Tvedestrand, Agder · Active 9 Jan 1940 41 GOODTECH ASA org.nr 914769922 · Oslo, Oslo · Active 1 Jan 1942 42 A/S Audax org.nr 930397091 · Bærum, Akershus · Active 8 Dec 1942 43 BEDRIFTSØKONOMISK INSTITUTT AS org.nr 919463147 · Oslo, Oslo · Active 1 Jun 1943 44 AS MECANA org.nr 922878269 · Asker, Akershus · Active 18 Dec 1944 45 APRIL ARKITEKTER AS org.nr 910279009 · Oslo, Oslo · Active 17 Sep 1945 46 TOLEKO AS org.nr 813889862 · Oslo, Oslo · Active 27 Mar 1946 47 INDRE ØSTFOLD REGNSKAPSBYRÅ SA org.nr 970024344 · Indre Østfold, Østfold · Active 5 Dec 1946 48 ROJA AS org.nr 931650637 · Oslo, Oslo · Active 4 Mar 1947 49 NORSK MALING- OG LAKKTEKNISK FORENING org.nr 971075821 · Sandefjord, Vestfold · Active 30 Sep 1948 50 FRIDTJOF NANSEN STIFTELSEN PÅ POLHØGDA org.nr 944137238 · Bærum, Akershus · Active 14 Oct 1948 51 LANDSFORBUNDET FOR OFFENTLIGE PENSJONISTER AVDELING TROMSØ OG OMEGN org.nr 997287916 · · Active 31 Dec 1948 52 LILLEBRYGGEN AS org.nr 930779164 · Trondheim, Trøndelag · Active 3 Feb 1949 53 VERDAL DRIFTSLAG SA org.nr 970064923 · Verdal, Trøndelag · Active 14 Feb 1949 54 NORSK TRETEKNISK INSTITUTT org.nr 967790672 · Oslo, Oslo · Active 29 Mar 1949 55 ØKORÅD VESTFOLD SA org.nr 947056654 · Holmestrand, Vestfold · Active 30 Dec 1949 56 NORDIC ACADEMY OF MANAGEMENT org.nr 822407412 · Bodø, Nordland · Active 1 Jan 1950 57 STIFTELSEN SINTEF org.nr 948007029 · Trondheim, Trøndelag · Active 26 Jan 1950 58 INSTITUTT FOR SAMFUNNSFORSKNING STI org.nr 974760991 · Oslo, Oslo · Active 9 Feb 1950 59 SONATA AS org.nr 822193072 · Oslo, Oslo · Active 29 Jan 1952 60 STIFTELSEN ADMINISTRATIVT FORSKNINGSFOND VED NORGES HANDELSHØYSKOLE org.nr 971228113 · Bergen, Vestland · Active 3 Sep 1952 61 PROACC AS org.nr 910439898 · Asker, Akershus · Active 6 Sep 1952 62 ØKORÅD RINGSAKER SA org.nr 953009617 · Ringsaker, Innlandet · Active 6 Nov 1952 63 SPYDEBERG REGNSKAPSLAG SA org.nr 968840657 · Indre Østfold, Østfold · Active 13 Dec 1952 64 FOLLO REGNSKAP SA org.nr 971521554 · Ås, Akershus · Active 15 Dec 1952 65 MODUM REGNSKAPSKONTOR SA org.nr 971540044 · Modum, Buskerud · Active 31 Dec 1952 66 RESKO AS org.nr 915374166 · Trondheim, Trøndelag · Active 5 Jan 1953 67 EIDSBERG HERREDS REGNSKAPSLAG SA org.nr 970025510 · Indre Østfold, Østfold · Active 15 Jun 1953 68 INSTITUTT FOR ENERGITEKNIKK STI org.nr 959432538 · Lillestrøm, Akershus · Active 25 Sep 1953 69 LANDVIK REGNSKAPSLAG SA org.nr 971455004 · Grimstad, Agder · Active 6 Nov 1953 70 HAUG REGNSKAPSLAG SA org.nr 870961332 · Øvre Eiker, Buskerud · Active 25 Nov 1953 71 SANDAR REGNSKAP SA org.nr 967667129 · Sandefjord, Vestfold · Active 10 Dec 1953 72 SIGDAL REGNSKAP SA org.nr 971445807 · Sigdal, Buskerud · Active 1 Jan 1954 73 REGNSKAPSTJENESTER SØR SA org.nr 970933565 · Arendal, Agder · Active 1 Jan 1954 74 TJØLLING REGNSKAP SA org.nr 970077227 · Larvik, Vestfold · Active 1 Jan 1954 75 SOLA REGNSKAP SA org.nr 970532110 · Sola, Rogaland · Active 15 Mar 1954 76 LILLUNN AS org.nr 913925793 · Oslo, Oslo · Active 4 May 1954 77 JÆREN REKNESKAPSLAG SA org.nr 971557397 · Klepp, Rogaland · Active 31 Dec 1955 78 PRINTEX SALES & PROMOTION AS org.nr 915248063 · Sarpsborg, Østfold · Active 22 Aug 1956 79 SKOGTILTAKSFONDET org.nr 939582835 · Oslo, Oslo · Active 31 Dec 1956 80 RAMBØLL NORGE AS org.nr 915251293 · Oslo, Oslo · Active 12 Feb 1957 81 VÅGÅ REGNSKAP SA org.nr 971089725 · Vågå, Innlandet · Active 27 Apr 1957 82 BEDRIFTS-ØKONOMISK KONTOR AS org.nr 910440152 · Haugesund, Rogaland · Active 27 May 1957 83 BANGS OPPMÅLING AS org.nr 831292652 · Lillehammer, Innlandet · Active 9 Jun 1957 84 HASTON AS org.nr 934139925 · Oslo, Oslo · Active 21 Jun 1957 85 ALLROUND AS org.nr 910121758 · Bamble, Telemark · Active 7 Aug 1957 86 HG-REGNSKAP SANDNES SA org.nr 971428708 · Sandnes, Rogaland · Active 3 Jan 1958 87 REGNSKAPSKONTORET KNARVIK AS org.nr 914379571 · Alver, Vestland · Active 12 May 1958 88 BAKER TILLY GRIMSRUD & CO. ANS org.nr 948315963 · Oslo, Oslo · Active 1 Jun 1958 89 NIELSEN MEDIA RESEARCH AS org.nr 821600022 · Oslo, Oslo · Active 24 Oct 1958 90 TØRRESSEN INVEST AS org.nr 925567469 · Sandnes, Rogaland · Active 25 Oct 1958 91 NOR-PAR AS org.nr 922106282 · Oslo, Oslo · Active 8 Dec 1958 92 MACEDA AS org.nr 930905348 · Tvedestrand, Agder · Active 2 Mar 1959 93 HUS & EIENDOM AS org.nr 914813689 · Fredrikstad, Østfold · Active 20 Apr 1959 94 FRED. OLSEN INSURANCE SERVICES AS org.nr 914945356 · Oslo, Oslo · Active 8 Sep 1959 95 FOSEN REGNSKAPSLAG org.nr 981149173 · Ørland, Trøndelag · Active 1 Jan 1960 96 WPP NORWAY AS org.nr 918398945 · Oslo, Oslo · Active 29 Feb 1960 97 FOTO FILM AS org.nr 911799480 · Bærum, Akershus · Active 21 Mar 1960 98 NORSK VVS ENERGI- OG MILJØTEKNISK FORENINGS STIFTELSE FOR FORSKNING org.nr 977132916 · Oslo, Oslo · Active 28 Apr 1960 99 OLAV KNUTSEN AS org.nr 913481658 · Haugesund, Rogaland · Active 12 May 1960 100 ADVOKATFIRMAET LIABØ & ØISTENSEN AS org.nr 915316271 · Bergen, Vestland · Active 14 Sep 1960
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Source

Biztrac.no · Data from the Brønnøysund Register Centre and the Norwegian Tax Administration · Last updated 02.09.2026.

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.

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