| Ab Dyviken Båt Oy | Manufacturing | 1996 |
| Ab Eduform Oy | Administrative & support | 1993 |
| Ab Högholmen hamn Oy | Arts & recreation | 2024 |
| Ab Keien Establishment Oy | Real estate | 2024 |
| Ab M:son Oy | Construction | 2022 |
| Ab OMF International Ltd | Construction | 2005 |
| Ab Pappila Design Oy | Professional & scientific | 2018 |
| Ab Qbi Construction Oy | Construction | 2025 |
| Ab Scan-Reform Oy | Wholesale & retail | 1990 |
| Airiston Aluspalvelu Oy | Wholesale & retail | 1995 |
| Airiston Portti Oy | Agriculture & fishing | 2021 |
| Anders Mickelsson & Co Oy Ab | Agriculture & fishing | 1986 |
| Apaja Consulting Oy | Professional & scientific | 2019 |
| Archipelago All Service Oy Ab | Construction | 2022 |
| Bysmak Ab | Hospitality | 2017 |
| Cozy & Laid Back Oy | Hospitality | 2023 |
| Cruise Service PB Oy Ab | Professional & scientific | 1995 |
| EL Mathias Ab Oy | Construction | 2022 |
| Euromec Oy Ab | Administrative & support | 2022 |
| Farmin Sumppi Oy | Hospitality | 2021 |
| Finn Trout Oy | Agriculture & fishing | 2020 |
| Finnhover Oy | Manufacturing | 2013 |
| Firma Astri & E Oy | Wholesale & retail | 2026 |
| Firmalogia Ky | Professional & scientific | 1989 |
| Go-Records Oy | Arts & recreation | 1989 |
| Kiinteistöosakeyhtiö Potamus | Real estate | 2006 |
| Kirjais Skola Ab | Hospitality | 2023 |
| Kleyber Oy | Construction | 2019 |
| Kuljetus Fredriksson Avoin yhtiö | Transport & logistics | 2015 |
| Ky Nauvon turvatekniikka - Nagu säkerhetsteknik Kb | Wholesale & retail | 1994 |
| Living Archipelago AB | Hospitality | 2016 |
| Makeria Oy | Wholesale & retail | 2010 |
| Merikoti Oy | Health & social care | 2002 |
| Micks Trä & Järn Ab Oy | Wholesale & retail | 2008 |
| Muovi-Ässä Oy | Manufacturing | 1989 |
| Måfo Consulting Ab | Information & communication | 2021 |
| Nagu Greens AB | Agriculture & fishing | 2021 |
| Nukra Ky | Construction | 2002 |
| Nagu Marina Ab | Transport & logistics | 2013 |
| Nauvon Turkistarha Oy | Agriculture & fishing | 1979 |
| Oy Allfarm Ab | Manufacturing | 1998 |
| Oy Medica Finland Ab | Wholesale & retail | 2004 |
| Oy Nausto Ab | Financial services | 2012 |
| PM Woodtool AB OY | Wholesale & retail | 2007 |
| Palautuspolku Oy | Professional & scientific | 2026 |
| Peksan Oy | Professional & scientific | 2009 |
| Pensar Trål Ab | Agriculture & fishing | 2009 |
| Piirinen Service Oy | Construction | 2023 |
| Pokun talli Oy | Other services | 2016 |
| Rakas Kakaw Oy | Wholesale & retail | 2023 |
| Rcave Ab | Arts & recreation | 2024 |
| Rederi Ab Vitharun | Transport & logistics | 2016 |
| Saaristohuvilat Andersson & Dahlin, avoin yhtiö | Hospitality | 2007 |
| Sanmarin Oy | Manufacturing | 2019 |
| Skärgårdshavets Sorteringsstation Ab | Manufacturing | 2011 |
| Skäripojkarna Öppet Bolag | Administrative & support | 2013 |
| Stenskärs Stugor och Fisk Öppet bolag | Hospitality | 2024 |
| TPM Käännökset Oy | Professional & scientific | 2007 |
| Toivomäen Tila Oy | Agriculture & fishing | 1946 |
| Tre Partners Ab | Financial services | 2024 |
| Troolen Oy Ab | Wholesale & retail | 2019 |
| Venetex Oy | Manufacturing | 2004 |
| Villa Vintage Ab | Wholesale & retail | 2019 |
| Västergård Innspis Ab | Hospitality | 2020 |
| rakmol Oy | Construction | 2023 |