| AMH Maritime Consultancy Ab | Transport & logistics | 2025 |
| Ab Archi-Rest Oy | Hospitality | 1998 |
| Ab Kowa Solar Oy | Construction | 2021 |
| Ab Oculex Oy | Financial services | 1995 |
| Ab fintouring Oy | Hospitality | 2013 |
| Amalias Hem Oy | Manufacturing | 2020 |
| Archipelago SeaRide Ab | Transport & logistics | 2006 |
| BMA Miljö öppet bolag | Transport & logistics | 1990 |
| BojeNy AB | Hospitality | 2019 |
| Carfield Oy | Administrative & support | 1991 |
| Daniels Verkstad Oy Ab | Other services | 2024 |
| Finest Rent Oy | Wholesale & retail | 2017 |
| Fysiola Oy | Health & social care | 2018 |
| GV Electric Ab | Construction | 2016 |
| GV Holding Ab | Real estate | 2021 |
| Galtbyn Puoti, avoin yhtiö | Wholesale & retail | 1996 |
| Go Archipelago Ab Oy | Administrative & support | 2020 |
| Hannaksen tila Oy | Agriculture & fishing | 2025 |
| Idevo Oy | Financial services | 2003 |
| Jyri Oy | Construction | 1988 |
| Karby Östergård AB | Agriculture & fishing | 2022 |
| Kaunis Kukko Oy | Wholesale & retail | 2019 |
| Korpo Båtbygg Ab | Manufacturing | 1979 |
| Korpo Farmartjänst Ab | Professional & scientific | 1992 |
| Korpo Handel Ab | Wholesale & retail | 2007 |
| Korpo Handel Invest Ab | Real estate | 2021 |
| Korpo Skärgårdshotell Ab Korppoon Saaristohotelli Ab | Hospitality | 2008 |
| Korpogård-KG Oy | Health & social care | 2004 |
| Leo Veggie Ab | Agriculture & fishing | 2022 |
| Lizvet Oy AB | Professional & scientific | 2023 |
| Madtax AB | Professional & scientific | 2021 |
| Maskinentreprenör T. Lindström Ab | Construction | 2007 |
| Melnu Oy | Wholesale & retail | 2025 |
| Nystu Lantbruk Ab | Agriculture & fishing | 2008 |
| Oy Bhava Industries Ab | Transport & logistics | 2013 |
| Oy Korpo Marin Service Ab | Manufacturing | 1990 |
| Pakaneli Oy | Financial services | 2025 |
| Pentti Sarparanta Ky, louhinta- ja maanrakennustarvike | Wholesale & retail | 1989 |
| Rumarstrand Oy | Hospitality | 2021 |
| Saaristomeren kiinteistöpalvelut Oy | Construction | 2024 |
| Seligson Sander Multiservice OY | Administrative & support | 2026 |
| Sisustusliike My Country Home Ky | Professional & scientific | 2008 |
| Skura Service Ab Oy | Administrative & support | 2025 |
| Solvillan avoin yhtiö | Hospitality | 2020 |
| Taksi Lehtonen Korppoo Oy | Transport & logistics | 2025 |
| Ubuntu Productions Oy | Information & communication | 2024 |
| Urement Ky | Manufacturing | 1996 |
| VanHög Oy | Administrative & support | 2019 |
| Vikomin Peruna Oy | Agriculture & fishing | 2016 |