| A&Z Arctic Oy | Hospitality | 2023 |
| APEXFLOORS Ab | Construction | 2025 |
| Ab T. Björkqvist | Professional & scientific | 2007 |
| Ag Farge oy | Transport & logistics | 2021 |
| Alicons Kb | Construction | 2012 |
| Almgren Group Ky | Other services | 2016 |
| Aula-Parketti Oy | Construction | 1987 |
| Avoin yhtiö Pyhtään Kuntokeskus | Health & social care | 1984 |
| BILJARDIMANIA Oy | Arts & recreation | 2014 |
| Broby Board Oy | Manufacturing | 2025 |
| Buildox oy | Information & communication | 2020 |
| CD Beraf Oy | Other services | 2019 |
| Cafe HillaMaria Oy | Hospitality | 2023 |
| Carryhill Oy | Construction | 1997 |
| ELMIRA Solutions Oy | Professional & scientific | 2024 |
| Eagle Products Oy | Manufacturing | 2004 |
| Eden Hoivapalvelut Oy | Health & social care | 2012 |
| EduOpas Oy | Education | 2025 |
| Eliam Oy | Professional & scientific | 2014 |
| Enre Kiinteistöt Oy | Real estate | 2021 |
| Etelä-Suomen kaluste- ja laatoitusmestarit Oy | Construction | 1997 |
| Evimeria Oy | Health & social care | 2011 |
| Finnalist OY | Wholesale & retail | 2000 |
| Finninno Oy | Manufacturing | 2009 |
| GK Realisointi Oy | Wholesale & retail | 2018 |
| Hj-Garage Avoin Yhtiö | Wholesale & retail | 2011 |
| Hablexe Oy Ab | Professional & scientific | 2015 |
| Haimetec Oy | Manufacturing | 2024 |
| Heinäsaaren Kala Ky | Agriculture & fishing | 1989 |
| Hempyöli Oy | Arts & recreation | 2014 |
| Hiomonraitti Oy | Real estate | 1993 |
| Huutcode Oy | Professional & scientific | 2022 |
| Huutjärvi Yhtiöt Oy | Real estate | 2012 |
| IMO-USE Oy | Transport & logistics | 2019 |
| Indoor Skydiving Consultation ISC Oy Ltd. | Information & communication | 2018 |
| Innosfääri Oy | Professional & scientific | 2023 |
| Insinööritoimisto Kai Kakko Oy | Professional & scientific | 2009 |
| Isokasi Oy | Education | 2019 |
| JK-Automaatio Oy | Construction | 2006 |
| Jotunbiz Oy | Wholesale & retail | 2012 |
| KEIP Oy | Wholesale & retail | 2022 |
| KJK-Kuljetus Avoin Yhtiö | Transport & logistics | 2005 |
| Kahvila-konditoria Hygge Oy | Hospitality | 2017 |
| Karviset Holding Oy | Professional & scientific | 2018 |
| Kennel-Rehu Oy | Manufacturing | 2021 |
| Kiertävä Farmi Pyhtää Ky | Arts & recreation | 1999 |
| Kiinteistö Oy Pyhtään Granvik | Real estate | 1994 |
| Kiinteistö Oy Pyhtään Malminmäki | Real estate | 2008 |
| Kiinteistö Oy Sillankaari | Real estate | 1973 |
| Kiinteistöosakeyhtiö Pyhtään Ripakkamäki | Real estate | 2008 |
| Kimpi & Food Oy | Wholesale & retail | 2023 |
| Koneyhtymä M & M Pellas | Construction | 2012 |
| Konvertia Group Oy | Manufacturing | 1989 |
| Kotitsa Oy | Hospitality | 1999 |
| Kotka Invest Oy | Real estate | 2016 |
| Kotsing Oy | Real estate | 2015 |
| Kujakiila Oy | Wholesale & retail | 1986 |
| Kuljetus Joutsen Oy | Other services | 2021 |
| Kuljetusliike Liljeqvist Oy | Transport & logistics | 2013 |
| Kymen Ekosähkö Oy | Construction | 2018 |
| LVI-Asennus Hjelm Ky | Construction | 2006 |
| Lvi-Pytek OY | Construction | 2016 |
| La Monstra Oy Ltd | Information & communication | 2017 |
| Lasse Gango Oy/Ab | Financial services | 1987 |
| Luhtimaja Oy | Financial services | 1999 |
| MAXHOUSE avoin yhtiö | Construction | 2011 |
| Maa- ja Vesirakennus Veppling Ky | Construction | 1989 |
| Manitpois Oy | Manufacturing | 1995 |
| Markham Charta Oy | Professional & scientific | 2007 |
| Merihotelli Mäntyniemi Oy | Hospitality | 2006 |
| Metsätyöpalvelu Muukka Oy | Agriculture & fishing | 2023 |
| Munapirtin Sora, avoin yhtiö | Mining & quarrying | 1990 |
| Nanea Oy | Professional & scientific | 2006 |
| Navaga Oy | Professional & scientific | 2013 |
| Neittamo Ky | Manufacturing | 1990 |
| Nikama-Expert Timo Puonti Kommandiittiyhtiö | Health & social care | 1999 |
| Nuottakallion toimintaterapia Oy | Health & social care | 2019 |
| Ohjelmatoimisto Timjami Ky | Professional & scientific | 2004 |
| Oosom Oy | Construction | 1994 |
| Oy Finnlife Ltd | Transport & logistics | 2004 |
| Oy Mercato Esperto FI Ltd | Professional & scientific | 1993 |
| Oy Mäkirinne Broby Ab | Financial services | 1981 |
| Oy Senior Brokers Ltd | Real estate | 1998 |
| Paja Foods Oy | Hospitality | 2023 |
| Paperpap Oy | Wholesale & retail | 1989 |
| Pesula Jari Hyötyläinen Ky | Other services | 2000 |
| Phisionare Oy | Information & communication | 2017 |
| Pihat Oy Uusitalo | Professional & scientific | 1986 |
| Pointerio Oy | Information & communication | 2023 |
| Pushau Oy | Professional & scientific | 2017 |
| Puutarhatoimisto Onnenpensas Oy | Wholesale & retail | 1984 |
| Pyhtään Kulttuuriravintolat Oy | Hospitality | 2023 |
| Pyhtään Kulttuuritalo Oy | Arts & recreation | 2020 |
| Pyhtään Maansiirto Ky | | 1984 |
| Pyhtään Peruna ja Vihannestuote Ky | | 1978 |
| Pyhtään Saaristopalvelu Oy | Construction | 2026 |
| Pyhtään tähti Oy | Hospitality | 2025 |
| RV Spark Solutions Oy | Construction | 2024 |
| Rakennus Roy Sundberg Oy | Construction | 2013 |
| Rakennus-Rasi Oy | Construction | 1985 |