| 101 Invest AS | Education | 2017 |
| 1190 Play AS | Education | 2023 |
| 2015 Eiendom AS | Real estate | 2015 |
| 2BY2 Bygg AS | Construction | 2022 |
| 3 S, Säffle Service Support AB Nuf | Transport & logistics | 2010 |
| 4-FLIS AS | Construction | 2024 |
| 43 Holding AS | | 2022 |
| A & C Eiendom AS | Real estate | 2018 |
| A & C Holding AS | Manufacturing | 2018 |
| A E Gunnarsson Ans | Construction | 1994 |
| A Karlsen & Sønn AS | Construction | 1986 |
| A L Høyer Askim AS | Professional & scientific | 1986 |
| A. Christoffersen AS | Administrative & support | 2013 |
| A. Økonomi AS | Professional & scientific | 2020 |
| A.C.E. Racket Og Treningssenter AS | Arts & recreation | 2017 |
| Aa Eiendom Og Service AS | Real estate | 2019 |
| Aamodt Støpeservice AS | Construction | 2025 |
| Aazzy Invest AS | | 2021 |
| Abl AS | Transport & logistics | 2025 |
| Abm Holdingselskap AS | | 2018 |
| Ac&Dc Power AS | Wholesale & retail | 2013 |
| Ace Security AS | Administrative & support | 2019 |
| Achic AS | Wholesale & retail | 2026 |
| Ad Hoc Tjenester AS | Administrative & support | 2012 |
| Ad Lib Kunst Og Kultur AS | Professional & scientific | 2019 |
| Adh Garn Og Hjemmeproduksjon Ans | | 1988 |
| Adk Eiendom AS | Real estate | 2024 |
| Advokatfellesskapet Norlaw Da | Administrative & support | 1989 |
| Advokatfirmaet Dingstad-Eriksen AS | Professional & scientific | 2014 |
| Advokatfirmaet Vegard Lien AS | Professional & scientific | 2014 |
| Afb Eiendom AS | Real estate | 2000 |
| Afjeld Holding AS | Financial services | 2018 |
| AG Landbrukstjenester AS | Agriculture & fishing | 2025 |
| Agroformidling Ans | Wholesale & retail | 1989 |
| Agronor AS | Wholesale & retail | 1996 |
| Ah Mysensgate Eiendom AS | Real estate | 2020 |
| Ajt Ekstrahjelpen AS | Real estate | 2025 |
| Ak Rørleggerservice AS | Construction | 2020 |
| Akha Invest AS | | 2025 |
| Akjellmann AS | Professional & scientific | 2022 |
| Aktiv Askim AS | Real estate | 1976 |
| Aktiv Eiendomsservice AS | Professional & scientific | 2015 |
| Aktiv Grupp AS | Construction | 2018 |
| Aktiv Invest AS | Professional & scientific | 1992 |
| Alex Tømrerservice AS | Construction | 2023 |
| Alf Martinsen Invest AS | Real estate | 2005 |
| Alvit Da | Information & communication | 2008 |
| Alwart Trading AS | Administrative & support | 2017 |
| Am Maler AS | Construction | 2024 |
| Am Utvikling AS | Real estate | 2017 |
| Amatea AS | Construction | 2025 |
| Amio AS | Health & social care | 2026 |
| Amit Transport AS | Transport & logistics | 2020 |
| Amplio AS | Professional & scientific | 2009 |
| Analyse Project AS | Professional & scientific | 1990 |
| Andersen & Sønner AS | Wholesale & retail | 2024 |
| Andersens Spesialprodukter AS | Wholesale & retail | 1986 |
| Andresen Pumping Systems AS | | 2024 |
| Ankar AS | | 2021 |
| Anleggsgartner Kristian Sørby AS | Administrative & support | 1979 |
| Anleggsgartner Lyng, Høntorp & Svendby AS | Administrative & support | 2024 |
| Anne Borger Mysen Takst AS | Professional & scientific | 2020 |
| Apotekgården AS | Real estate | 1987 |
| App Accounting AS | Professional & scientific | 2024 |
| Aratus Logistics Norway AS | Professional & scientific | 2014 |
| Are Brug Eiendom AS | Real estate | 2007 |
| Are Treindustrier AS | Manufacturing | 2016 |
| Are Treindustrier Askim AS | Manufacturing | 2003 |
| Arild Kolstad A/S | Construction | 1987 |
| Arisol AS | Wholesale & retail | 2008 |
| Art Gate AS | | 2022 |
| Art GATE1 AS | Professional & scientific | 2024 |
| AS Askim Bilrekvisita | Wholesale & retail | 2002 |
| AS Revision | Professional & scientific | 2007 |
| AS Vindusglass | Construction | 1968 |
| Asah Eiendom AS | Real estate | 2026 |
| Askim & Spydeberg Sparebank | Financial services | 1888 |
| Askim - Løkenveien 1A AS | Real estate | 2025 |
| Askim - Masengveien 1 AS | Real estate | 2025 |
| Askim - Rådhusgata 5 AS | Real estate | 2025 |
| Askim - Rådhusgata 7 AS | Real estate | 2025 |
| Askim - Stallgata 4 AS | Real estate | 2025 |
| Askim - Torget 14 AS | Real estate | 2025 |
| Askim - Torget 8 AS | Real estate | 2025 |
| Askim Auto AS | Wholesale & retail | 2024 |
| Askim Bad Og Eiendom AS | Construction | 2015 |
| Askim Bilglassenter AS | Other services | 2017 |
| Askim Bilsenter AS | Wholesale & retail | 2026 |
| Askim Bilverksted AS | Other services | 2025 |
| Askim Caravan & Fritid AS | Wholesale & retail | 2023 |
| Askim Corner AS | Hospitality | 2024 |
| Askim Corner Bar Da | Hospitality | 2016 |
| Askim Dermaklinikk AS | Other services | 2020 |
| Askim Eiendom AS | Real estate | 1989 |
| Askim El-Installasjon AS | Construction | 2007 |
| Askim Forsikring & Finans Ans | | 1992 |
| Askim Frukt- Og Bærpresseri AS | Manufacturing | 2004 |
| Askim Fysio AS | Health & social care | 2022 |
| Askim Gatekjøkken AS | Hospitality | 2025 |
| Askim Helse Da | Health & social care | 2021 |