| Kapten Invest Oy | Professional & scientific | 2025 |
| Karjalan Maalaamo Oy | Construction | 1980 |
| Kati-Furniture Oy | Wholesale & retail | 1988 |
| Katoksi Oy | Construction | 2019 |
| Kierrätysmetalli Life Oy | Wholesale & retail | 2009 |
| Kiinteistö Oy Antinkärki | Real estate | 2021 |
| Kiinteistö Oy Hattulan Öljysäiliö | Real estate | 2006 |
| Kiinteistö Oy Junttijoki | Real estate | 1988 |
| Kiinteistö Oy Nikkarinkuja 4 | Real estate | 2017 |
| Kiinteistö Oy Parolan Ratatie 4 | Real estate | 2016 |
| Kiinteistö Oy Vanajanharju | Construction | 1989 |
| Kiinteistö Oy Vekka | Real estate | 2015 |
| Kinnalan Peruna Oy | Agriculture & fishing | 2015 |
| Klaukkalan Sisustustyö Oy | Construction | 2010 |
| Klubben Sport Finland Oy | Wholesale & retail | 2009 |
| Kohateam Oy | Information & communication | 1994 |
| Kone- ja korjaamopalvelu Hellgren Oy | Construction | 2020 |
| Koskelainen Sijoitus Oy | Financial services | 2011 |
| Kotelopaino T. Luosto Oy | Manufacturing | 1988 |
| Kuljetus A. Huhkamo Oy | Transport & logistics | 1998 |
| Kuljetusliike H. Haanpää Oy | Transport & logistics | 1996 |
| Kuljetusliike Koskelainen Oy | Transport & logistics | 2011 |
| Kuljetusliike P. Raitala Kommandiittiyhtiö | Transport & logistics | 1980 |
| Kultaseppä Hakuli Ky | Manufacturing | 1989 |
| Kuonokumpu Oy | Arts & recreation | 2022 |
| Kuukkelilampi Oy | Wholesale & retail | 2020 |
| LTT Palvelut Oy | Administrative & support | 2025 |
| Laertes Oy | Real estate | 1995 |
| Lasse Orkola Oy | Real estate | 2021 |
| Lentuan Karhumaja Oy | Real estate | 1991 |
| Louhinta Visala Oy | Construction | 2017 |
| Länsi-Suomen Säätöpalvelu Ky | Administrative & support | 1999 |
| M.T.P.Kirvestyö Ky | Wholesale & retail | 2000 |
| MAP-Yhtiöt Oy | Education | 2010 |
| MTT-Palvelut Oy | Transport & logistics | 2019 |
| Maanrakennus J.Kerälä Oy | Construction | 2009 |
| Maavire Oy | Construction | 1989 |
| MalliInfra Oy | Professional & scientific | 2026 |
| Marjukka Nieminen Ky | Other services | 2006 |
| Matin Mediapalvelu Oy | Administrative & support | 1996 |
| Maxrek Oy | Wholesale & retail | 1995 |
| MedicEar Oy | Health & social care | 2012 |
| Milectria Group Oy | Manufacturing | 2004 |
| Milectria Power Oy | Manufacturing | 2017 |
| Modestone Oy | Wholesale & retail | 2016 |
| Mäccäri OY | Professional & scientific | 2024 |
| Mäh1 Holding Oy | Professional & scientific | 2021 |
| NED Finland Oy | Hospitality | 2004 |
| Navidea Oy | Information & communication | 2007 |
| Newpoint Oy | Construction | 2007 |
| Nordic Avia Oy | Transport & logistics | 2011 |
| Nordic Working Crew Oy | Administrative & support | 2024 |
| Nosoy Oy | Manufacturing | 2017 |
| Nosto ja Asennus Passila Oy | Construction | 2021 |
| OhjelMAX Oy | Information & communication | 2023 |
| Ompelimo Pepitar ky | Manufacturing | 1989 |
| Orava-Yhtiöt Oy | Transport & logistics | 2018 |
| Osuuskunta HumBeat | Arts & recreation | 2011 |
| Osuuskunta Monineuvo | Professional & scientific | 2016 |
| Osuuskunta Villapakka | Wholesale & retail | 2017 |
| Oval Point Oy | Information & communication | 1989 |
| Oy Calamus & Co | Wholesale & retail | 2022 |
| Oy Viima Inn Ltd | Construction | 2010 |
| Pelti Simolin & Co OY | Construction | 2013 |
| PME Autokulma Oy | Wholesale & retail | 2017 |
| PMR Group Oy | Real estate | 2022 |
| PP-Peruna Oy | Agriculture & fishing | 1992 |
| PR-Katto ja Rakennus Ky | Construction | 1993 |
| PU Kiinteistöt Oy | Real estate | 2012 |
| Paljuritari Oy | Administrative & support | 2021 |
| Paltamon Eagle Oy | Real estate | 2012 |
| Paperipiste Oy | Manufacturing | 1968 |
| Papinpellon Lämpö Oy | Energy | 2009 |
| Pariwod Oy | Education | 2020 |
| Parolan Asema Oy | Professional & scientific | 2025 |
| Parolan Fysioterapia Oy | Health & social care | 1991 |
| Parolan Kukkakauppa avoin yhtiö | Wholesale & retail | 1994 |
| Parolan Kuntoklubi Oy | Arts & recreation | 2002 |
| Parolan Näkökeskus Oy | Wholesale & retail | 1990 |
| Parolan Rengas ja Auto Oy | Wholesale & retail | 1978 |
| Parolan Rosolli Oy | Hospitality | 2007 |
| Parolan Rottinki Oy | Wholesale & retail | 1978 |
| Parolan Sähkötekniikka Oy | Construction | 2022 |
| Parolan Teltta Oy | Manufacturing | 2018 |
| Paroprint Oy | Manufacturing | 2008 |
| Pelkolan Kartano Oy | Agriculture & fishing | 2022 |
| Pentep Oy | Other services | 1992 |
| Pentti Janhunen Consulting Oy | Professional & scientific | 2014 |
| PiPa Hatunen Oy | Transport & logistics | 1996 |
| Pintametalli Aaltonen Ky | Manufacturing | 1987 |
| Pintodos Oy | Professional & scientific | 1994 |
| Pohjamo A & P Oy | Wholesale & retail | 2003 |
| Porsoontien Metsä Oy | Agriculture & fishing | 2015 |
| Psykologipalvelu Kikka Oy | Health & social care | 2019 |
| Psykoterapia Juurille Oy | Health & social care | 2025 |
| Putkityö Immonen Oy | Construction | 2007 |
| Pönnighaus - Hirsitalot Oy | Wholesale & retail | 1997 |
| RR Enterprises Oy | Real estate | 1982 |
| RS Retail Oy | Wholesale & retail | 2016 |
| RSY Oy Kodin sähkö- ja tekninen talkkaripalvelu | Construction | 2015 |