Bedrift H - Grefsen
- Havas AS
- Havas AS
- Harmless DA
- Helbra AS
- Hunger AS
- Heartmakermusic AS
- Hermart AS
- Hemaja AS
- Haralditt AS
- Hassel2 AS
- Husi AS
- Haralditt AS
- Hubble AS
- Heggenhaugen AS
- Heimdrag AS
- Haugsbø
- Houston911
- Hfu AS
- Hauk Engelien
- Hjerneverk Engelien
- Hans Klæstad
- Helse Stave
- Helge Bøe
- Hyunkoon Yoo
- Hveem Consulting
- Harald Koht
- Hakkebakkeskogen Kastanjeveien
- Hartmann Holding AS
- Hm Rør AS
- Høvern Holding AS
- Husk Eiendom AS
- Hegdalveien 59 AS
- Hrøst Invest AS
- Hedmarken Eiendom AS
- Henrik Bondevik
- Helene Abrahamsen
- Heppt Consulting
- Hårvik Bedriftsrådgivning
- Hendy Thorstensen
- Henryk Koziatek
- Hanna Koziatek
- Halsen Media
- Hovdegård Frilans
- Hallenstvedt Consulting
- HTH Holding AS
- Hukkelberg Invest AS
- Holmeide Holding AS
- Hilde 1609 AS
- Husi Gruppen AS
- Husi Prosjekt AS
- HH Elektro AS
- Hilmar Hammerhei AS
- Hans Wedvik
- Hege Haaland
- Hallbjørg Almås
- Helgens Underholdning
- Henriksen Consulting
- Hafjell Veteranskiklubb
- Hpa Holding AS
- Hdztlz Yilmaz
- Herman Skylstad
- Hans Andersen Consulting
- Heimdall Net Defense DA
- Hege Eika Frey
- Hansen & Bondevik AS
- Harald Lunde Helgesen
- Hegertun Ingrid Amlie
- Hudlege Ana Soler AS
- Hotell Contract Interiør AS
- Haavard Ellingsen Holding AS
- Harald Aas Consulting
- Harald Bækkelund Psykologi
- Hudkonsulenten Monrad-Krohn
- Henrik Stoltz Vernegg
- Hagen Glen Philip
- Hands On Retail AS
- Helga Aag Håtveit
- Høegh-Omdal Malerfirma
- Hr & Business AS
- Hri 201 Holding AS
- Håvaldsrud Jostein Nydahl
- Henning Normann Consulting AS
- H.H.Holding AS
- Historielaget Grefsen-Kjelsås- Nydalen
- Historielaget Grefsen-Kjelsås- Nydalen
- Høyland Ord og Tall
- Heidi Anette Solli Holm
- Haraldsplass Diakonale Stiftelse Oslo
- Hr & Business Johansen
- Hansen Live Marie Strandvik
- HK Verden Hege Kristin Bergan
- Holck Musikkformidling Jørgen Holck Johannessen
- Haugenatur og Gjenbruk Eirik Haugen Bjordal
- Hermansen Eiendoms Service, Rydd og Vask
- Hårpunkt Frisør Thuy Thi Thu Nguyen
- Hauger gård V/ Lise-Marit Amlie
- Høy Terskel - Askild Vatnbakk Larsen Trening
- House Of the Grill & Pizza Hussain
- Holten Institutt for Medisinsk Treningsterapi Tom Arild Torstensen