| Nordic Access Oy | Other services | 2016 |
| Nuuksion Taika Oy | Arts & recreation | 2008 |
| OJ-Sähkö Oy | Construction | 2020 |
| Oksanen Holding Oy | Financial services | 2022 |
| Onnentekijät osk | Manufacturing | 2013 |
| Onnin maansiirto Oy | Construction | 2025 |
| Original Design Tapio Yli-Viikari Oy LTD | Professional & scientific | 2018 |
| Osteomedic Oy | Health & social care | 2015 |
| OtaVoima osk | Arts & recreation | 2018 |
| Otacon Oy | Professional & scientific | 2026 |
| Oy Sound Center Inc. | Manufacturing | 1971 |
| Oy Traktor Group Ab | Wholesale & retail | 2024 |
| PJ -Katot Avoin yhtiö | Construction | 2003 |
| PNP Ranch Oy | Arts & recreation | 2026 |
| Pekka Olin Oy | Administrative & support | 2015 |
| Peltonen Sales Oy | Wholesale & retail | 2009 |
| Perhekoti Katinhäntä oy | Health & social care | 2015 |
| Pian Puhdistus Palvelu Oy | Manufacturing | 2011 |
| Pientä Pintaremppaa Oy | Administrative & support | 2020 |
| Pikkapp Oy | Construction | 2012 |
| Pimenno Oy | Wholesale & retail | 2005 |
| Pirunpaja Oy | Manufacturing | 2020 |
| Poika ja Ämpäri Oy | Construction | 1994 |
| Puhallus Group Oy | Construction | 2026 |
| Pukk Rakennuspalvelu Oy | Construction | 2026 |
| Puutyö O. Virtanen Oy | Construction | 1995 |
| Päiväkoti Tikru, avoin yhtiö | Education | 1996 |
| RP-Masinex Oy | Professional & scientific | 1992 |
| RPT Urakointi Oy | Mining & quarrying | 2025 |
| Rakennus-Suikkanen Oy | Construction | 1990 |
| Rakennuspalvelu Väyrynen Oy | Construction | 2004 |
| Ranen Maanrakennus Oy | Construction | 2019 |
| RasMer Oy | Administrative & support | 2011 |
| Reino Hietala Oy | Professional & scientific | 1995 |
| Repotar Oy | Wholesale & retail | 2024 |
| Rätte Group Oy | Professional & scientific | 2017 |
| Santoia OY | Wholesale & retail | 2014 |
| SV Kuivaus Oy | Construction | 2020 |
| Salla Ikonen Art Oy | Arts & recreation | 2020 |
| Samin Saneeraus Oy | Construction | 2008 |
| Saneeraus Henriksson Oy | Construction | 2006 |
| Santala Racing Oy | Arts & recreation | 1989 |
| Santun PutkiData Oy | Construction | 2021 |
| Satu Mali Productions Oy | Professional & scientific | 2019 |
| Siippoon Tikini Oy | Wholesale & retail | 1998 |
| Skog Racing Service Oy | Other services | 1995 |
| Soulhouse Unit Oy | Real estate | 2021 |
| Sparkbite Oy | Information & communication | 2015 |
| Suomen Apu-Group Oy | Wholesale & retail | 2008 |
| TB-Yhtiöt oy | Construction | 2022 |
| TC Quality Wear Oy | Wholesale & retail | 2003 |
| THT Group Oy | Professional & scientific | 2019 |
| TMR Asennus OY | Construction | 2019 |
| Talo ABC Oy | Construction | 2015 |
| Taloseppä Oy | Construction | 1996 |
| Tapanilan Liikenne Oy | Administrative & support | 2011 |
| Tasoiteneliö Oy | Construction | 1993 |
| Team Louhivuori Oy | Administrative & support | 2024 |
| TeamDream Oy | Other services | 2021 |
| Telecom Security Partners Oy | Information & communication | 2010 |
| Terpan Putki Oy | Construction | 2022 |
| Tig-Palvelu Oy Reijo Salin | Construction | 1989 |
| Tiimirakentajat Oy | Construction | 2020 |
| Tomkei Oy | Construction | 1987 |
| Tradee Oy | Construction | 2025 |
| Trukki- & Konehuolto Kari Koivisto Oy | Wholesale & retail | 2006 |
| Tuohitilit Oy | Professional & scientific | 2014 |
| Uudenmaan Hunajatila Oy | Agriculture & fishing | 2019 |
| Uudenmaan Maanrakennussuunnittelu Oy | Professional & scientific | 1995 |
| VKR Rakennus Oy | Construction | 2019 |
| ViA-Pro Oy | Professional & scientific | 2022 |
| Vihdin - Hyöty Romu Oy | Wholesale & retail | 1983 |
| Vihdin PR-Rakennus Oy | Construction | 1990 |
| Vihdin konetyö Oy | Construction | 2007 |
| Väkivahva Oy | Professional & scientific | 2023 |
| hm logservice oy | Professional & scientific | 2023 |