| Emanuel & Louise Holding AB | Financial services | 2025 |
| Embo Invest Ab | Financial services | 1987 |
| Emilio Eklund Ab | Professional & scientific | 2022 |
| Emmaus Ab Pierre | Health & social care | 2018 |
| Emretsson byggprodukter Ab | Wholesale & retail | 2008 |
| Energiprestanda Ab | Construction | 2008 |
| Engblom & Frantzén AB | Professional & scientific | 2007 |
| Er Bil Ab | Wholesale & retail | 2024 |
| Erhard & Co Ab | Professional & scientific | 2025 |
| Ericalund Ab | Other services | 2023 |
| Erik Rustner Tandläkare Ab | Health & social care | 2013 |
| Eriks Glas Ab | Construction | 2009 |
| Eriksberg AB | Information & communication | 2004 |
| Eriksberg Invest Ab | Financial services | 2018 |
| Eriksson Bygg Ab | Construction | 2001 |
| Eriksson Capital Ab | Financial services | 1984 |
| Erlandsson & Erlandsson Ab | Arts & recreation | 2021 |
| Eson Fastigheter Ab | Real estate | 1994 |
| Esox Åland Ab | Professional & scientific | 2019 |
| Estabi Oy | Information & communication | 2026 |
| Eteq Ab | Information & communication | 2026 |
| Etuiet Ab | Financial services | 1990 |
| Evolver Equity Ab | Financial services | 2018 |
| Evolver Equity GP II AB | Financial services | 2023 |
| Evolver Fund I Ky | Financial services | 2019 |
| Evolver Fund II Ky | Financial services | 2024 |
| Evolver Investment Group Ab | Professional & scientific | 2009 |
| Expo Event Åland Ab | Hospitality | 2026 |
| F-Fast Ab | Real estate | 2014 |
| F-MOB Ab Ltd (FRAN Multi Oil Burner Aktiebolag) | Manufacturing | 2024 |
| FAB Emmaus Norrböle | Real estate | 2017 |
| Fab Kilen | Real estate | 2021 |
| FAB Södermar Ab | Real estate | 2026 |
| FAB Tisteln Ab | Real estate | 2025 |
| FAB Uppgårdsvägen 18 Ab | Real estate | 1970 |
| Faweto Invest AB | Wholesale & retail | 2018 |
| FKM konsult AB | Other services | 2018 |
| FRAN Ab | Manufacturing | 2006 |
| FTB Management Ab | Professional & scientific | 2013 |
| FUNNEL 4 YOU Ab | Professional & scientific | 2019 |
| Factotum Ab | Professional & scientific | 2026 |
| Factotus Ab | Financial services | 2019 |
| Faded Barbershop Ab | Other services | 2025 |
| Farahani Ab | Hospitality | 2013 |
| FarmHouse Cards Oy | Wholesale & retail | 2025 |
| Fast Ab Havsglimt | Real estate | 1988 |
| Fastighets AB Lemlandshus | Real estate | 1989 |
| Fastighets AB Mejeribackan | Real estate | 2004 |
| Fastighets Ab Atum | Real estate | 2007 |
| Fastighets Ab Björkgården | Real estate | 1977 |
| Fastighets Ab Blåa Huset 1d | Real estate | 2018 |
| Fastighets Ab Borgen i Jomala | Real estate | 2017 |
| Fastighets Ab Borgmästaren | Real estate | 1989 |
| Fastighets Ab Brandkåristen | Real estate | 2014 |
| Fastighets Ab Bygg-Dax | Real estate | 1988 |
| Fastighets Ab Byggpartner | Real estate | 2023 |
| Fastighets Ab Capitolium | Real estate | 2004 |
| Fastighets Ab Dalnäs | Real estate | 1990 |
| Fastighets Ab Enebo | Real estate | 1990 |
| Fastighets Ab Enggården | Real estate | 1956 |
| Fastighets Ab Förvaltaren | Real estate | 2002 |
| Fastighets Ab GE | Real estate | 1989 |
| Fastighets Ab Godbycenter | Real estate | 1976 |
| Fastighets Ab Grandell | Financial services | 1983 |
| Fastighets Ab Gripen | Real estate | 1945 |
| Fastighets Ab Gröninge | Real estate | 2018 |
| Fastighets Ab Gula Huset 1c | Real estate | 2009 |
| Fastighets Ab Handelslänken 1 | Real estate | 2010 |
| Fastighets Ab Havsgatan 24 | Real estate | 1996 |
| Fastighets Ab Horsklint | Real estate | 1989 |
| Fastighets Ab Hos | Real estate | 1996 |
| Fastighets Ab Idrottsgatan 13 | Real estate | 1981 |
| Fastighets Ab Kaptensgatan 13 | Real estate | 2026 |
| Fastighets Ab Karlbergsvägen 1 Mariehamn | Real estate | 2019 |
| Fastighets Ab Köpmansgatan 4 i Mariehamn | Real estate | 1993 |
| Fastighets Ab Laurenska Gården i Mariehamn | Real estate | 1987 |
| Fastighets Ab Mariegatan 48 | Real estate | 1989 |
| Fastighets Ab Marstad | Real estate | 1978 |
| Fastighets Ab Mejeritomten i Mariehamn | Real estate | 2013 |
| Fastighets Ab Meristorp | Real estate | 2009 |
| Fastighets Ab Norrböle | Real estate | 2006 |
| Fastighets Ab Nygatan 7 | Real estate | 1990 |
| Fastighets Ab Nåtö-Strömmar | Real estate | 1982 |
| Fastighets Ab Opalen | Real estate | 2020 |
| Fastighets Ab Pilotvägen 5 | Real estate | 2026 |
| Fastighets Ab Savoy | Real estate | 2008 |
| Fastighets Ab Segelmakargatan 4 | Real estate | 2022 |
| Fastighets Ab Segelmakargatan 5 | Real estate | 2024 |
| Fastighets Ab Sippan i Mariehamn | Real estate | 1998 |
| Fastighets Ab Sittkoffska Gården | Real estate | 1976 |
| Fastighets Ab Sjötuna | Real estate | 1984 |
| Fastighets Ab Skarpansvägen 26 i Mariehamn | Real estate | 1981 |
| Fastighets Ab Skogshyddsvägen 5 | Real estate | 2018 |
| Fastighets Ab Snellmansstigen 1 i Jomala | Real estate | 2006 |
| Fastighets Ab Snellmansstigen 3 i Jomala | Real estate | 2006 |
| Fastighets Ab Snäckan | Real estate | 2009 |
| Fastighets Ab Storagatan 8-9 | | 2026 |
| Fastighets Ab Strandgatan 14 | | 2026 |
| Fastighets Ab Strandgatan 20 | Real estate | 1995 |
| Fastighets Ab Strandgatan 23 i Mariehamn | Real estate | 1994 |