| Aava Lkv Oy | Real estate | 2021 |
| Ab 95. Gubbarna Oy | Education | 2014 |
| Ab E OFF Oy | Professional & scientific | 2008 |
| Ab Haglund Transport Oy | Transport & logistics | 2010 |
| Ab Kaskö Parkgatan 15 Oy | Real estate | 1975 |
| Ab Offline Oy | Professional & scientific | 1993 |
| Ab Protertio | Agriculture & fishing | 1999 |
| Akcet Oy | Professional & scientific | 2000 |
| Automaatiosuunnittelu Siponen Oy | Professional & scientific | 2010 |
| Avoin yhtiö Turva-Tarkka | Manufacturing | 2010 |
| BB Logistics Oy | Transport & logistics | 1991 |
| Bark Company Oy | Financial services | 2000 |
| Blondina Ab | Agriculture & fishing | 2014 |
| Commanti Oy | Information & communication | 2017 |
| D&K Events öppet bolag, avoin yhtiö | Administrative & support | 2013 |
| Deux Ex Machina Holding Ltd Oy | Financial services | 2023 |
| Edustusliike Jarmo Uusitalo Ky | Wholesale & retail | 1985 |
| Eskö Park Oy Ab | Real estate | 2002 |
| Fortuna Capital Ab | Financial services | 2015 |
| Himalaja terveyspalvelut Oy | Health & social care | 2020 |
| Horisontis Oy | Hospitality | 2026 |
| Ingenjörsbyrå Con-Jac Ab | Professional & scientific | 1997 |
| Ivar Örn Ab | Manufacturing | 2019 |
| J&J Real Estate Oy | Real estate | 2023 |
| JKF Consulting Ab Oy | Professional & scientific | 2019 |
| Jelmabox Oy | Wholesale & retail | 1998 |
| KSK Viitoset Oy | Real estate | 2011 |
| KaiKas Invest Oy | Real estate | 2024 |
| Kambs Fiskelag Ab Oy | Agriculture & fishing | 2001 |
| Kas-Kiinteistöt Oy | Financial services | 2000 |
| Kas-Rakennus Oy | Construction | 2008 |
| Kas-Telineet Oy | Construction | 1991 |
| Kas-Yhtiöt Oy | Construction | 1987 |
| Kascom Oy | Other services | 2022 |
| Kaskisten Musiikkipalvelu Oy | Wholesale & retail | 1989 |
| Kaskisten Puutarha Oy | Agriculture & fishing | 2002 |
| Kaskisten Savustamo Oy Ab | Manufacturing | 2022 |
| Kaskö Fiskehallen Ab | Manufacturing | 1998 |
| Kaskö Rörservice Öppna bolaget - Kaskisten Putkihuolto Avoinyhtiö | Construction | 1976 |
| Kaspoint Oy | Information & communication | 1988 |
| Katriina Moon Oy | Wholesale & retail | 2014 |
| Kiinteistö Oy Kaskisten Kirkkokatu 37 | Real estate | 2004 |
| Kiinteistö Oy Kaskisten Syväsatama | Real estate | 2005 |
| Kiinteistöyhtiö Tarmo OY | Real estate | 2021 |
| Ksktek Oy | Construction | 2022 |
| Kustannusosakeyhtiö Palava Sydän | Manufacturing | 2010 |
| Kvarnskatan Kb | Professional & scientific | 2002 |
| Ky Ratela Kb | Construction | 1987 |
| LY Company Oy | Wholesale & retail | 2025 |
| Leitandi Ab | Wholesale & retail | 2019 |
| MT Market Oy | Wholesale & retail | 2013 |
| Majoitus- ja Ravitsemusliike Sininen Hetki Oy | Hospitality | 2018 |
| Marhami Oy | Professional & scientific | 1990 |
| Medisafety Oy Ab | Administrative & support | 2008 |
| Meitmeal Oy Ab | Manufacturing | 2021 |
| Mikael Kirjonen Ky | Wholesale & retail | 1998 |
| NexisPoint Oy | Other services | 2024 |
| OISTER Oy | Information & communication | 2012 |
| Onrak Oy | Professional & scientific | 2019 |
| Oy Alekser Ab | Professional & scientific | 1986 |
| Oy Cneiff Ab | Financial services | 1992 |
| Oy Edmund Invest Ab | Financial services | 2000 |
| Oy Eintrend Ab | Financial services | 1986 |
| Oy FOUTAS Ab | Manufacturing | 2008 |
| Oy Foudila Ab | Wholesale & retail | 1989 |
| Oy Ha-Mi Invest Ab | Financial services | 1987 |
| Oy HotPro Ab | Hospitality | 2006 |
| Oy KAS-Service Ab | Administrative & support | 2003 |
| Oy Kas-Rest Ab | Real estate | 2000 |
| Oy Kaskinen Sea-Charter Ab | Transport & logistics | 2009 |
| Oy Kaskisten Satama - Kaskö Hamn Ab | Transport & logistics | 2014 |
| Oy Kaskisten kiinteistöt-Kaskö fastigheter Ab | Real estate | 1999 |
| Oy Kaskö Affärshus Ab | Real estate | 1997 |
| Oy Kaskö Grillcafé Ab | Hospitality | 1997 |
| Oy Nettiaitta Ab | Wholesale & retail | 1980 |
| Oy Portside Invest Ab | Real estate | 2019 |
| Oy Renskärs Lax Ab | Agriculture & fishing | 1975 |
| Oy Silva Shipping Ab | Transport & logistics | 1920 |
| Oy Sonnfish Ab | Agriculture & fishing | 1999 |
| Oy ViveRent Ab | Real estate | 2020 |
| Oy Weekend Snacks Ltd | Manufacturing | 1996 |
| Oy ÅTH-Palvelut Ab | Professional & scientific | 1990 |
| Pekomat Oy | Wholesale & retail | 2006 |
| Purje Consulting Oy | Professional & scientific | 2019 |
| Rajan Konepaja Oy | Manufacturing | 2005 |
| Selkämeren Forelli Ky, Aalto | Agriculture & fishing | 1981 |
| Sijoitusyhtiö Kaskisaari OY | Financial services | 2017 |
| Silva Seafood Finland Oy | Manufacturing | 2017 |
| Stay Alive Ab | Health & social care | 2025 |
| Strandfors Oy | Financial services | 2025 |
| Suojatuote Pro Oy | Wholesale & retail | 2012 |
| Suunnittelutoimisto Usko Foudila kommandiittiyhtiö | Professional & scientific | 1979 |
| Tasangon Leipomo Oy | Manufacturing | 1975 |
| Team Stream Kommandiittiyhtiö | Construction | 2006 |
| Vipeto Oy | Wholesale & retail | 2011 |
| Wanhan Pappilan Kahvila&Vierastalo Oy | Hospitality | 2009 |
| Wanhan Saunan Puoti Oy | Administrative & support | 2023 |
| Wide Clean Oy | Manufacturing | 2020 |