| AIR-WAY Oy | Construction | 2007 |
| Ab Bonders Oy | Arts & recreation | 2020 |
| Ab Korpo Stabshuset | Real estate | 2026 |
| Ab Parline Oy | Construction | 1997 |
| Ab Petter & Holm Oy | Construction | 2012 |
| Ab Trenil Oy | Other services | 2023 |
| AnaFix Oy | Construction | 2024 |
| Arancia Oy | Professional & scientific | 2006 |
| Arundon Mining Solutions Oy | Professional & scientific | 2008 |
| Arundon Process Solutions Oy | Professional & scientific | 2023 |
| Bergträsk Invest Ab | Administrative & support | 1988 |
| Bigge Oy | Professional & scientific | 2003 |
| Byzantine Solutions Oy | Financial services | 2012 |
| Cobuilt OY | Professional & scientific | 2022 |
| Carlson Cargo Ab | Transport & logistics | 2013 |
| Code Sourcery Oy | Information & communication | 2022 |
| Coffee Time Oy Ab | Wholesale & retail | 1995 |
| Da Wo Oy | Professional & scientific | 1997 |
| Dantech Oy | Construction | 2022 |
| Duck & Sail Oy | Wholesale & retail | 2019 |
| Echelon Records Avoin yhtiö | Information & communication | 2010 |
| Elerakennus Oy | Construction | 1998 |
| Fastighets Ab Snäckviken | Real estate | 1988 |
| HC-Palvelu Ky | Wholesale & retail | 1992 |
| Hakalax HR Oy | Professional & scientific | 2026 |
| Heli Subsea Oy | Wholesale & retail | 2008 |
| Hirvensalon ikkunanpesijä Oy | Administrative & support | 2021 |
| Hiuskulma Ravattula Oy | Other services | 2001 |
| Hjärtesak Ab | Health & social care | 2020 |
| Iin Auto ja Metalli Oy | Real estate | 1977 |
| Jar-Tours Oy | Administrative & support | 2015 |
| K-Technics Engineering & Supply Ky | Wholesale & retail | 1990 |
| KM-Rengas Oy | Transport & logistics | 1992 |
| Kainlauri Oy | Construction | 2007 |
| Katle Oy | Wholesale & retail | 1995 |
| Kiinteistö Oy Työkuja 3 | Real estate | 2013 |
| Kiinteistöyhtiö Nilsbynranta Oy | Real estate | 1991 |
| Kirjala Huoneistot Oy | Real estate | 2022 |
| Kirjala Invest Oy | Professional & scientific | 2022 |
| Kirjala vattenandelslag | Water & waste | 2018 |
| Kirjalan Kestikievari Oy | Real estate | 1974 |
| Kirjalan Maalauspalvelu Oy | Construction | 2016 |
| Kirjalan Puu- ja Saneeraustyö Oy | Manufacturing | 1989 |
| Komar Oy | Professional & scientific | 1991 |
| Koto Company Oy | Real estate | 2024 |
| Kultamarja Capital Oy | Financial services | 2026 |
| LiftUp avoin yhtiö | Administrative & support | 2014 |
| LiljaTec Oy | Construction | 2011 |
| Loisto Pro Oy | Construction | 2008 |
| MJL FamCap Oy | Financial services | 2026 |
| MTECH Turku Oy | Manufacturing | 2020 |
| Metsäpalvelu Oy Jarmo Mutka | Agriculture & fishing | 2013 |
| Millpack Holdings Oy | Financial services | 2026 |
| Mitta-Kiinteistö Oy | Real estate | 1987 |
| Mitta-Lasi Ky | Construction | 1979 |
| Nirox Oy | Construction | 1994 |
| Oivara Oy | Construction | 2009 |
| Outdoors Food Entertainment Oy | Arts & recreation | 2021 |
| Oy Bornemanns Ab | Manufacturing | 2017 |
| Oy Damec Ab | Manufacturing | 1989 |
| Oy Joventus Ab | Hospitality | 2020 |
| Oy Nyhollmen Ab | Financial services | 1993 |
| Oy Paraisten Kaukolämpöasennus | Manufacturing | 1977 |
| Oy Pargas Powertel Ab | Information & communication | 1997 |
| Oy Skärgårdens Schaktning Ab | Construction | 1999 |
| PHV Ekonomi Ab | Professional & scientific | 2021 |
| Paganus Oy | Transport & logistics | 2025 |
| Paraisten Reimari Oy | Financial services | 1981 |
| Paraisten Teollisuushalli Oy | Real estate | 1986 |
| Project Miracle Oy | Information & communication | 2024 |
| Påår Oy | Real estate | 2023 |
| Rakennus Ja Saneeraus Hakalaine OY | Construction | 2014 |
| Rakennusliike Pomu Oy | Construction | 2006 |
| Roat OY | Wholesale & retail | 2024 |
| Rose Invest Oy | Real estate | 2014 |
| Routaneva Oy | Construction | 2019 |
| Saaristokone Oy | Administrative & support | 2025 |
| Saariston Rakennuspalvelu Oy | Construction | 2008 |
| Samun Koneurakointi Oy | Water & waste | 2023 |
| Shine bright like a diamond Oy | Other services | 2021 |
| Silmar Oy | Real estate | 2012 |
| Sjörövarnästet Ab | Hospitality | 1992 |
| Skärgårdens Brunnsborrning Ab - Saariston Kaivonporaus Oy | Construction | 1991 |
| Skärgårdens Muddring Ab - Saariston Ruoppaus Oy | Construction | 2008 |
| Skärgårdscider Oy | Manufacturing | 2017 |
| Soime Oy | Construction | 2012 |
| Solsidan i Kirjala Ab | Real estate | 2014 |
| Strandbergs Oy Ab | Financial services | 1991 |
| Taksi Ojaranta Oy | Transport & logistics | 1996 |
| Tallberga Invest Ab | Financial services | 2017 |
| Tegelvikin Marjat Oy | Agriculture & fishing | 2016 |
| Teknoaction Oy | Wholesale & retail | 1978 |
| Trollgärda vattenandelslag | Water & waste | 2009 |
| Träkki Oy | Construction | 2009 |
| TuriRak Oy | Construction | 2020 |
| Valpas Henkilöstöpalvelut Oy | Administrative & support | 2008 |
| Veikko Taipale Oy | Hospitality | 1995 |
| Viemerö Trp Oy | Transport & logistics | 2019 |
| Viher- ja maanrakennus A. Santapukki Ky | Construction | 1989 |
| Vihervalta Oy | Construction | 1989 |