| Nivalan Koneasema Oy | Agriculture & fishing | 2009 |
| Nivalan Konevaruste Oy | Wholesale & retail | 1984 |
| Nivalan Kuitu Oy | Construction | 2018 |
| Nivalan Kuljetus avoin yhtiö | Transport & logistics | 2001 |
| Nivalan Laatukaluste Oy | Wholesale & retail | 1988 |
| Nivalan Liikuntakeskus Oy | Arts & recreation | 1992 |
| Nivalan Maansiirto Oy | Construction | 2007 |
| Nivalan Metsä- ja Konetyö Oy | Agriculture & fishing | 2020 |
| Nivalan Optiikka Ky | Wholesale & retail | 1982 |
| Nivalan Palvelukoti Oy | Health & social care | 1989 |
| Nivalan Pesula Oy | Other services | 1977 |
| Nivalan Pienkone ja Rauta Ky | Wholesale & retail | 1993 |
| Nivalan Raskaskonehuolto Oy | Other services | 2022 |
| Nivalan Rastas Oy | Agriculture & fishing | 2000 |
| Nivalan Ravirata Oy | Arts & recreation | 1950 |
| Nivalan Squash Gym Ky | Arts & recreation | 1995 |
| Nivalan Suksihuolto Avoin yhtiö | Other services | 2018 |
| Nivalan Taksipalvelu Oy | Transport & logistics | 2019 |
| Nivalan Taksipojat Oy | Transport & logistics | 2005 |
| Nivalan Talotekniikka Oy | Construction | 2015 |
| Nivalan Teollisuuskiinteistöt Oy | Real estate | 2017 |
| Nivalan Teollisuuskylä Oy | Real estate | 1975 |
| Nivalan Tervas Oy | Agriculture & fishing | 2001 |
| Nivalan Timanttikairaus Oy | Mining & quarrying | 2006 |
| Nivalan Vesihuolto Oy | Water & waste | 1959 |
| Nivalan Wemac Oy | Manufacturing | 2010 |
| Nivalan metsäpalvelu Oy | Agriculture & fishing | 2007 |
| Nordic Work Force Oy | Administrative & support | 2025 |
| North Piping Power Oy | Construction | 2016 |
| North-Piping Oy | Construction | 2016 |
| Nostopalvelu M.Vähäsöyrinki Oy | Construction | 2011 |
| NuHQ Founders Oy | Administrative & support | 2024 |
| NuHQ Oy | Professional & scientific | 2024 |
| Nuolikangas Oy | Agriculture & fishing | 1997 |
| Nuoliperän Vesi-osuuskunta | Water & waste | 1975 |
| Ohjelmointi Asko Rajamäki OY | Information & communication | 2012 |
| Ohdy Oy | Construction | 2026 |
| Ohtamaan Tila Oy | Agriculture & fishing | 2020 |
| Ojasaaren Biokaasu Oy | Energy | 2021 |
| Ollin Putkityö Oy | Construction | 1989 |
| Oman elämän stara Oy | Health & social care | 2020 |
| Optecor Oy | Construction | 1993 |
| Oy Järvelänlehto Ab | Transport & logistics | 2011 |
| PP Door Oy | Wholesale & retail | 2013 |
| PP Työstö Oy | Manufacturing | 2008 |
| PPE Holding Oy | Financial services | 2024 |
| PPE Service Oy | Construction | 2012 |
| PS Service Oy | Real estate | 2001 |
| Paakinahon Liikenne Oy | Transport & logistics | 1989 |
| Padel Nivala Oy | Arts & recreation | 2022 |
| Paiga oy | Construction | 2023 |
| Pajulani Oy | Agriculture & fishing | 2026 |
| Pala ja Lanka Ainasoja & Laulumaa Ky | Wholesale & retail | 1986 |
| Paljaloma Oy | Hospitality | 1991 |
| ParMik Oy | Construction | 2018 |
| Parolan Rautaportti Oy | Real estate | 2022 |
| ParrunPirssi Ky | Transport & logistics | 2019 |
| PatonkiAitta avoin yhtiö | Hospitality | 2006 |
| Paulus infra oy | Construction | 2026 |
| Peltisepänliike M.Paakki Oy | Construction | 2019 |
| Peltokankaan Tila Oy | Agriculture & fishing | 2021 |
| Peräaho Investment Oy | Real estate | 2026 |
| Peräahon Huoltopalvelut Oy | Real estate | 1995 |
| Peräahon Kone Ky | Wholesale & retail | 1983 |
| Pidisjärven Kustannus Oy | Information & communication | 1989 |
| Piha- ja Jätehuolto Ahola ky | Administrative & support | 1985 |
| Pihlajaniemen Kiinteistöt Oy | Real estate | 2018 |
| Pilikkumi Oy | Other services | 2008 |
| Pirkanmaan kantojyrsintä Oy | Administrative & support | 2025 |
| Pirpo Oy | Agriculture & fishing | 2012 |
| Pirttirannan Tila Oy | Agriculture & fishing | 2022 |
| Pohjan Raivaus Oy | Construction | 2008 |
| Pohjanmaan ICT-palvelu Oy | Information & communication | 2023 |
| Pohjanmaan Ikkuna- ja Oviasennus Oy | Construction | 2016 |
| Pohjanmaan Ketjuhuolto Oy | Manufacturing | 2016 |
| Pohjoinen Järvikala Oy | Agriculture & fishing | 2015 |
| Pohjois-Pohjanmaan kiinteistöt Oy | Real estate | 2013 |
| Pohjolan Infrahoito Oy | Construction | 2022 |
| Pohjolan Pihanhoito Avoin Yhtiö | Administrative & support | 2012 |
| Poratech Oy | Construction | 2016 |
| Pro Estore Oy | Manufacturing | 2000 |
| Pro-Cumetal Oy | Water & waste | 2024 |
| ProCater Oy | Wholesale & retail | 2007 |
| ProMechanics Oy | Manufacturing | 2018 |
| ProSania Oy | Agriculture & fishing | 2023 |
| ProtoNord Design Oy | Arts & recreation | 2025 |
| Puunkuljetus Ylikoski Oy | Transport & logistics | 2019 |
| Puustaja Oy | Manufacturing | 2021 |
| Päivärinnan Sähköliike Oy | Construction | 1952 |
| Päivärinta Invest Oy | Financial services | 2026 |
| R. Pikkarainen Ky | Administrative & support | 1991 |
| RAANI Oy | Real estate | 2017 |
| RI Kivioja Oy | Professional & scientific | 2022 |
| RL-Laatu Oy | Construction | 2010 |
| RS-Turve Oy | Agriculture & fishing | 1991 |
| RST-Holding Oy | Financial services | 2024 |
| RST-Holding Oy 2 | Financial services | 2026 |
| RST-Steel Oy | Manufacturing | 2005 |
| Rahtimaa Oy | Wholesale & retail | 1995 |
| Raijan Fysiopiste Oy | Health & social care | 2023 |