| A-Huopakatot oy | Construction | 2025 |
| ARR-Palvelut OY | Administrative & support | 2022 |
| Actival Oy | Professional & scientific | 1992 |
| Ahonhead Oy | Wholesale & retail | 2019 |
| Amnellin Puutarha Oy | Wholesale & retail | 2007 |
| Avalon Lastensuojelupalvelut Oy | Health & social care | 2020 |
| Carpalo Oy | Professional & scientific | 2017 |
| Catharina Consulting Oy Ab | Financial services | 2015 |
| Coronel Oy | Professional & scientific | 2010 |
| Country Life in Style Oy | Construction | 2022 |
| Custom Renos Finland Oy | Construction | 2020 |
| DiivArt Oy | Professional & scientific | 2017 |
| Dog Power Oy | Other services | 2009 |
| Eväskartano Oy | Hospitality | 2008 |
| Financial-Forecast Ky | Professional & scientific | 1989 |
| Finer Things Software Oy | Information & communication | 2026 |
| Finnprinters Ab | Manufacturing | 2003 |
| Gemm Oy | Professional & scientific | 1986 |
| Goodman Worldwide Oy | Professional & scientific | 2017 |
| Grafiyhtymä Oy | Wholesale & retail | 1996 |
| Harri-san Consulting Oy | Financial services | 2009 |
| Henkka Hurme Inspirations Oy | Construction | 2004 |
| Hips Group Oy | Construction | 2021 |
| IS-Farmi Oy | Agriculture & fishing | 2021 |
| Jamox Trans OY | Transport & logistics | 2010 |
| JTV-Invest Oy | Information & communication | 1988 |
| Jasmin-Invest Oy | Professional & scientific | 1987 |
| K. Huolman Oy | Construction | 2024 |
| Kaffedor Oy | Hospitality | 2021 |
| Kanalan Kartano Oy | Health & social care | 1995 |
| Kb B. Isaksson Ky | Information & communication | 1994 |
| Kiinteistö Oy Harvsin Kalliola | Real estate | 1993 |
| Kiinteistö Oy Kukkula | Real estate | 2007 |
| Kiinteistö Oy Mel-Ros Tokka | Real estate | 1991 |
| Kiinteistö Oy Siuntion Triangeln | Real estate | 1998 |
| Kiinteistö Oy Öfvergård | Real estate | 2002 |
| Kiinteistöosakeyhtiö Maapaikka | Real estate | 2009 |
| Kiviasennus Kekäläinen Oy | Construction | 1993 |
| KoiPi Partners Oy | Wholesale & retail | 2015 |
| Kommanditbolag Sjundeå Stenhuggeri | Manufacturing | 1991 |
| Kone Kuosmanen Oy | Construction | 2010 |
| Kuljetus B.Böckerman Oy | Transport & logistics | 2001 |
| Kuljetus E. Autio Oy | Transport & logistics | 1996 |
| Kuljetusliike K-O. Karlberg Transportbolag Ab | Transport & logistics | 1979 |
| KuuKaivuu Oy Ab | Construction | 2023 |
| La-Jun Hoito Oy | Health & social care | 1990 |
| Laitinen Enterprises Oy | Professional & scientific | 2024 |
| Lanstu Oy | Professional & scientific | 2017 |
| Lohjan koiratrimmaamo OY | Other services | 2021 |
| Louhintajontte Oy | Administrative & support | 1996 |
| M Mannermaa Finland Oy Ltd | Real estate | 1990 |
| Maalausympyrä Oy | Construction | 1994 |
| Manuaalinen hoito Karppinen Oy | Health & social care | 2021 |
| Max Urakointi OY | Construction | 2020 |
| Metalli-Kari Oy | Manufacturing | 2014 |
| Miconsia Oy | Education | 2024 |
| Mkh-services Oy | Transport & logistics | 2023 |
| Monttukone Oy | Construction | 2012 |
| Napita Oy | Information & communication | 2006 |
| Nötterbacka Oy | Agriculture & fishing | 2021 |
| Originaali Oy | Professional & scientific | 2010 |
| Oy Anta Ab | Construction | 1993 |
| Oy GeoWest Ab | Professional & scientific | 2004 |
| Oy Kirkkonummen Eläinlääkäriasema AB | Professional & scientific | 2012 |
| Peten Tilitoimisto Oy | Professional & scientific | 2025 |
| PintaX Oy | Construction | 2020 |
| Pistaasi-Gourmet Oy | Hospitality | 1994 |
| Proficum Oy | Health & social care | 2012 |
| Rakennus ja saneeraus L & T Oy | Construction | 2007 |
| Rakennusliike P. Heikkinen Ky | Construction | 2003 |
| Ralf Svendblad Oy | Wholesale & retail | 2019 |
| Ravenlake Oy | Professional & scientific | 2011 |
| Razline Oy | Wholesale & retail | 1991 |
| Rebel Life Oy | Manufacturing | 2020 |
| Riekkotec Oy | Professional & scientific | 2025 |
| S&E Equestrian Oy | Agriculture & fishing | 2026 |
| SE-Action Oy | Arts & recreation | 1998 |
| SK Nordic Oy | Arts & recreation | 2025 |
| SSM Rakennuspalvelut Oy | Construction | 2013 |
| SiHe Oy | Hospitality | 2020 |
| Sisustusliike Sermi Ky | Professional & scientific | 1997 |
| Siuntio Invest Oy | Real estate | 2022 |
| Siuntion ATK Oy | Information & communication | 2017 |
| Siuntion Autohuolto Oy | Manufacturing | 2015 |
| Sophrolite Oy | Education | 2015 |
| SpaceUp Oy | Professional & scientific | 2013 |
| Studio Kujasalo Oy | Professional & scientific | 2007 |
| Suitian Linna Oy | Real estate | 2015 |
| Svidja Gård Ab | Real estate | 2015 |
| Sähkötyö Arpiainen Oy | Construction | 2022 |
| Toivari Works Oy | Transport & logistics | 1987 |
| Travel Media Matkailulehdet Oy | Information & communication | 1991 |
| Tuotantoyhtiö Dr. Z Oy | Arts & recreation | 2009 |
| TwentyOne media Oy | Arts & recreation | 2017 |
| Ty's She Oy | Arts & recreation | 2021 |
| Työfysioterapia Jaxxa Oy | Health & social care | 2013 |
| Utu Design Oy | Professional & scientific | 2018 |
| Uudenmaan TalliTuuraajat Oy | Agriculture & fishing | 2015 |
| VV-Konet oy | Administrative & support | 2025 |
| Varastointi/lastaus Autio Oy | Transport & logistics | 2022 |