| Omega 365 CS AS | Professional & scientific | 2021 |
| Omega 365 Design AS | Information & communication | 1997 |
| Omega 365 Group Services AS | Professional & scientific | 2026 |
| Omega 365 IT Consulting AS | Professional & scientific | 2023 |
| Omega 365 Norway AS | Information & communication | 2016 |
| Omega 365 Property AS | Real estate | 2016 |
| Omega AS | Information & communication | 1991 |
| Omega Subsea Robotics AS | Administrative & support | 2022 |
| Omega Subsea Tooling Technology AS | | 2025 |
| PM Service 24/7 Da | Construction | 2015 |
| Prefab Eiendom Og Utleie AS | Administrative & support | 2024 |
| Prefab Gruppen AS | Administrative & support | 2024 |
| Prefabpartner AS | Wholesale & retail | 2022 |
| Prlm-Invest AS | Real estate | 2005 |
| Roa Tomteselskap AS | Real estate | 2005 |
| Roalkvam Invest AS | | 2020 |
| Rok Staff AS | Professional & scientific | 2025 |
| Sabe Invest AS | Real estate | 2011 |
| Sama Shipping AS | Transport & logistics | 2008 |
| Sandfrakt Eiendom AS | Real estate | 2009 |
| Sandfrakt Holding AS | Administrative & support | 2008 |
| Seljestad Utbygging AS | Real estate | 2001 |
| SH Norman Consulting AB Nuf | Professional & scientific | 2016 |
| Sirius Shipping AS | Transport & logistics | 2013 |
| Sjøvest Ans | Real estate | 2005 |
| Skeiseid Utviklingsselskap AS | Real estate | 2012 |
| Skybert-Pt AS | Transport & logistics | 2024 |
| Skånevik Ølen Kraftlag AS | | 1978 |
| Slåttevik Utbygging AS | | 2013 |
| Stoica Sprinkler AB | Manufacturing | 2006 |
| Taxi Ølensvåg AS | Transport & logistics | 2017 |
| Tbtec AS | Professional & scientific | 2026 |
| Terjes-Vindu AS | Wholesale & retail | 2011 |
| Tessa Invest AS | Real estate | 2010 |
| Tube AS | Real estate | 2011 |
| Vidar Øvrevik AS | Construction | 2009 |
| Vindafjord Tomteselskap AS | Real estate | 2009 |
| Vågen Bygdasenter AS | Real estate | 1996 |
| Wepro Da | Manufacturing | 1995 |
| Westcon 39 AS | Manufacturing | 2019 |
| Westcon Eiendom AS | Real estate | 2006 |
| Westcon Group AS | Manufacturing | 2010 |
| Westcon Hexacage AS | Professional & scientific | 2022 |
| Westcon Invest AS | Manufacturing | 2014 |
| Westcon Power & Automation AS | Construction | 2020 |
| Westcon Turbo AS | Manufacturing | 2006 |
| Westcon Yards AS | Manufacturing | 1981 |
| Westgryf - Weglarz I Narozanska Nuf | Construction | 2005 |
| XL Bygg Berge Sag AS | Wholesale & retail | 2010 |
| Øb Group AS | Manufacturing | 2020 |
| Øb Kran & Transport AS | Transport & logistics | 2025 |
| Øb Ålesund Betong AS | Manufacturing | 2024 |
| Ølen Begravelsesbyrå AS | Other services | 1998 |
| Ølen Betong AS | Manufacturing | 1989 |
| Ølen Betong Gruppen AS | Real estate | 1974 |
| Ølen Betong Murmansk AS | Real estate | 2012 |
| Ølen Betong Prefab AS | Manufacturing | 2026 |
| Ølen Betong Transport AS | Transport & logistics | 1993 |
| Ølen Dykkerservice Ans | | 1989 |
| Ølensvåg Autosenter AS | Wholesale & retail | 2009 |
| Ølensvåg Utvikling AS | Real estate | 2017 |
| Ørs Eiendom AS | Real estate | 2015 |