| Zefyr Asset Management AS | Financial services | 2023 |
| Zegma AS | Wholesale & retail | 2008 |
| Zein Holding AS | | 2025 |
| Zeltek Industries Ans | Professional & scientific | 2006 |
| Zeltek Industries Inc | Professional & scientific | 2007 |
| Zen Cafe AS | Hospitality | 2012 |
| Zenya Medisinsk Klinikk AS | Other services | 2024 |
| Zetha Invest AS | Real estate | 1997 |
| Zetlitz Gate 4 Huseierforening | Households | 1990 |
| Zhao AS | | 2025 |
| Zilo Media AS | Professional & scientific | 2025 |
| Zip Zap AS | Wholesale & retail | 2010 |
| Zippora AS | | 2019 |
| Zjakk Klippoteque AS | Other services | 1992 |
| Zongosol AS | Real estate | 2026 |
| Zrch AS | Information & communication | 2021 |
| Zrch Services AS | Information & communication | 2023 |
| ZT Fiskeri AS | Agriculture & fishing | 2026 |
| Zuper Kapital AS | Arts & recreation | 2022 |
| Zuppa Sartor AS | Construction | 2014 |
| Zupperi AS | Hospitality | 2020 |
| Zynergy AS | Real estate | 2021 |
| Ådna Eiendom A/S | Real estate | 2005 |
| Ågotnes Parken AS | Real estate | 2019 |
| Ågotnes Utvikling AS | Real estate | 2013 |
| Åkeren AS | | 2025 |
| Åkletten 7 AS | Real estate | 2020 |
| Åløya Invest AS | Real estate | 2020 |
| Åmotsfoss Kraft AS | Energy | 2018 |
| Åpne Rom AS | Professional & scientific | 2018 |
| Årdal Kraftverk AS | Energy | 2020 |
| Årstad Bygg AS | Construction | 2026 |
| Årstadklinikken AS | Health & social care | 2015 |
| Årtun Invest AS | | 2021 |
| Årvika AS | Information & communication | 2024 |
| Åsamyrane 165 AS | Real estate | 2020 |
| Åsane Handel AS | Real estate | 2004 |
| Åsane Sentrum Øst AS | Real estate | 2011 |
| Åse Lie Holding AS | Real estate | 2019 |
| Åsgreina Bolig AS | Real estate | 2020 |
| Åstveit Eiendom AS | Hospitality | 2017 |
| Åstveit Entertainment AS | Arts & recreation | 2005 |
| Åstveit Holding AS | Professional & scientific | 2017 |
| Åstveit Hotell Og Restaurant AS | Hospitality | 2017 |
| Åstveit Investor AS | Hospitality | 2017 |
| Åstveitneset I AS | Financial services | 1997 |
| Åstveitneset II AS | Financial services | 1997 |
| Åstveitneset III AS | | 2020 |
| Åstveitneset IV AS | | 2020 |
| Åtselfilm Da | Information & communication | 2019 |
| Åtun Utbygging AS | Real estate | 2023 |
| Åstveit Marina A/S | Real estate | 1983 |
| Æge Energy AS | Professional & scientific | 2017 |
| Æge Group AS | Professional & scientific | 2019 |
| Æge Operations AS | Professional & scientific | 2020 |
| Æge Power AS | Wholesale & retail | 2021 |
| Æppæppæpp AS | Information & communication | 2023 |
| Ø.Antonsen AS | Construction | 1992 |
| Ø.Skarstein Holding AS | | 2022 |
| Ø.Vika Eiendom AS | Real estate | 2022 |
| Ø.Vika Holding AS | Administrative & support | 2021 |
| Øfb Holding AS | | 2025 |
| Økernveien 119/121 AS | Real estate | 1985 |
| Økonomi & Rettshjelp AS | Professional & scientific | 2022 |
| Økonomihuset AS | Professional & scientific | 2002 |
| Økonomihuset Holding AS | Real estate | 2006 |
| Økonomistyring AS | Professional & scientific | 2002 |
| Økonomiutvikling AS Bergen | Professional & scientific | 1991 |
| Øl Invest AS | | 2021 |
| Øle Wiksen AS | Arts & recreation | 2018 |
| Øllegård Holding AS | | 2019 |
| Ømu AS | Real estate | 2005 |
| Ørjan Kristiansen Holding AS | Real estate | 2005 |
| Ørjan Tveit AS | Professional & scientific | 2011 |
| Ørvig Invest AS | | 2005 |
| Øse AS | Real estate | 2020 |
| Østbø Eiendom AS | Transport & logistics | 1988 |
| Østbø Holding AS | Real estate | 2008 |
| Østnorsk Vind AS | Professional & scientific | 2020 |
| Østre Murallmenningen 2 AS | Real estate | 2018 |
| Østre Murallmenningen 7 AS | Real estate | 2019 |
| Østre Nattlandsfjellet Barnehage Ans | Education | 2007 |
| Østre Skostredet AS | Hospitality | 2023 |
| ØSV28 AS | Real estate | 2018 |
| Øverli Kapital AS | | 2024 |
| Øvre Ervik Eiendom AS | Real estate | 1998 |
| Øvre Frydenlund Boliglag AS | Households | 1948 |
| Øvre Fyllingsvei 83 AS | Real estate | 2000 |
| Øvre Gruppen AS | Hospitality | 2025 |
| Øvre Holsbergstien Utvikling AS | Real estate | 2006 |
| Øvre Korskirkealmenning 1 AS | Real estate | 2002 |
| Øvre Korskirkealmenningen 4 AS | Real estate | 2008 |
| Øvre Morvik SA | Households | 1985 |
| Øvre Ole Bulls Plass 1 AS | Real estate | 2007 |
| Øvre Sandviksveien 23 AS | Real estate | 2018 |
| Øvregaten 15 AS | Real estate | 2021 |
| Øvregaten 7 Næring AS | Real estate | 2009 |
| Øvregaten Kolonial Da | Wholesale & retail | 1989 |
| Øvrehus Psykologtjenester AS | Health & social care | 2025 |
| Øvsttunveien 46 AS | Real estate | 2017 |