| Mäkitalo dream Invest Oy | Hospitality | 2020 |
| Möötin nuohouspalvelu Oy | Administrative & support | 2025 |
| N-Neon Ky | Manufacturing | 1982 |
| N-Roof Oy | Other services | 2026 |
| NOVMAR Oy | Construction | 2014 |
| Nasut Oy | Agriculture & fishing | 2016 |
| Neero Oy | Administrative & support | 2014 |
| NevaSet Oy | Professional & scientific | 2013 |
| Niemer Oy | Manufacturing | 1992 |
| Nieminiitty Oy | Wholesale & retail | 1997 |
| Niittyheinä Oy | Real estate | 2025 |
| Niko Kulmala Oy | Transport & logistics | 2021 |
| Nordeco Oy | Energy | 2002 |
| Norhage Oy | Wholesale & retail | 2024 |
| OHY Isotalo Oy | Financial services | 2000 |
| OMK Technology Oy | Construction | 2020 |
| OP Koti Satapirkka Oy LKV | Real estate | 1994 |
| Or Yhtiöt OY | Real estate | 1988 |
| Ocedron Oy | Energy | 2022 |
| Ofergo Oy | Wholesale & retail | 1997 |
| Olges Invest Oy | Real estate | 2002 |
| Onni Yrityspalvelut Oy | Administrative & support | 2020 |
| Opti Huit Oy | Wholesale & retail | 2000 |
| Optotele Oy | Information & communication | 1994 |
| Osakeyhtiö Valkeakosken Kaapelitie 23 | Real estate | 1998 |
| Osuuskunta Lauttakylän Rauta ja Talous | Wholesale & retail | 2012 |
| Otsokoski Oy | Financial services | 2024 |
| Oy Daily Trading Ltd | Wholesale & retail | 1986 |
| P & M Heikkilä Ky | Transport & logistics | 1992 |
| P M Trans Oy | Transport & logistics | 1992 |
| P Mahlamäki Ky | Transport & logistics | 1984 |
| Peic OY | Construction | 2003 |
| PESA-Service Oy | Manufacturing | 1995 |
| PH Kattaus Oy | Hospitality | 2025 |
| PKT-Rakennus Oy | Construction | 1998 |
| PRL Electric Oy | Construction | 2020 |
| PZ Welding Service Oy | Manufacturing | 2021 |
| Paakari & Maakarit Oy | Hospitality | 2025 |
| Paanar Oy | Real estate | 1993 |
| Pahkaparatiisi Ky | Hospitality | 1999 |
| Paikallisliikenne P Santalahti Ky | Transport & logistics | 1960 |
| Pajaenergia Oy | Energy | 2021 |
| Pajamaja Oy | Real estate | 2016 |
| Palvimestarit MM Oy | Wholesale & retail | 1974 |
| Pantterinpesä Oy | Real estate | 2003 |
| Parhautta Oy | Wholesale & retail | 2024 |
| Paula Teerikoski Oy | Hospitality | 2009 |
| Pawac Oy | Construction | 2026 |
| PeMas-rent Oy | Administrative & support | 2021 |
| Pelkkiä Hyviä Oy | Information & communication | 2024 |
| Peltisepät Kari Oy | Construction | 1986 |
| Pelttarin Auto Oy | Wholesale & retail | 1963 |
| Pentti Hantula Oy | Real estate | 1989 |
| Piekat Oy | Professional & scientific | 1990 |
| Piharakennus J. Suomela Oy | Construction | 2012 |
| Pikajako Oy | Transport & logistics | 1996 |
| Pilvi Solutions Oy | Information & communication | 2023 |
| Pimatic Oy | Manufacturing | 2019 |
| Pinweld Ky | Manufacturing | 2001 |
| Pirannava Intelligence Oy | Information & communication | 2017 |
| Pirkanmaan Peltiuuni Oy | Construction | 2018 |
| Pirttikoski Invest Oy | Financial services | 2010 |
| Plevna Oy | Real estate | 1991 |
| Polarteknik Oy | Manufacturing | 2016 |
| Polsunkulman Paja avoin yhtiö | Other services | 2025 |
| Pontelli Oy | Administrative & support | 2008 |
| Porgi Oy | Construction | 2020 |
| Potra Oy | Agriculture & fishing | 2003 |
| Promific Oy | Professional & scientific | 1994 |
| Psl Puustax Heimo Järvinen Ky | Construction | 1997 |
| Pub-Ravintola Sininen Karhu avoin yhtiö | Hospitality | 1998 |
| Puheenjohtaja.com Oy | Wholesale & retail | 2021 |
| Pujoma Oy | Manufacturing | 1989 |
| Pukinlinnan liikekulma Oy | Real estate | 2024 |
| Puomila Equestrian Ky | Arts & recreation | 2016 |
| Puukassa Oy | Real estate | 2024 |
| Puunkorjuu Rekola Oy | Agriculture & fishing | 1999 |
| QUENOFFICE Ky | Wholesale & retail | 2001 |
| RG Synergy Oy | Manufacturing | 2021 |
| Rjelas OY | Manufacturing | 2026 |
| RM Autovälitys Oy | Wholesale & retail | 2021 |
| RR-Korjuu Oy | Agriculture & fishing | 2006 |
| Rajaniemi Ravintolat Oy | Hospitality | 2016 |
| Rakennusliike Jarmo Ruusumaa Oy | Construction | 1992 |
| Rakennuspalvelu Matti Laaksonen Oy | Construction | 2017 |
| Rakennustyöt Partanen Oy | Construction | 2011 |
| Rakennusurakointi Kari Kinnari Ky | Construction | 1985 |
| RamVex avoin yhtiö | Wholesale & retail | 1986 |
| Ran-Metalli Oy | Manufacturing | 2016 |
| Ranin Electro Oy | Manufacturing | 2022 |
| Rannan tila Oy | Agriculture & fishing | 2018 |
| Rantaniitty Oy | Other services | 2022 |
| Rauta ja Maatalous Huittinen Oy | Wholesale & retail | 2010 |
| Ravintola Family Avoin yhtiö | Hospitality | 2024 |
| Reuna-Kiinteistöt Ky | Wholesale & retail | 2015 |
| Ri-Mak Solutions Oy | Wholesale & retail | 2011 |
| Riku Helin Oy | Transport & logistics | 2022 |
| Ritakallion Lähiliha Oy | Manufacturing | 2022 |
| Rivalry Oy | Wholesale & retail | 1993 |
| Roador Oy | Transport & logistics | 2020 |