| Oy Nexo Scandinavia Ltd | Wholesale & retail | 2006 |
| Oy Noricus Ab | Real estate | 1990 |
| Oy Novandi Capital Ab | Financial services | 1991 |
| Oy O Häggblom Ab | Financial services | 2017 |
| Oy Omata Ab | Real estate | 2016 |
| Oy Passiflora Ab | Professional & scientific | 2018 |
| Oy Pintechnix Ab | Arts & recreation | 2023 |
| Oy Pirelex Ab | Manufacturing | 2001 |
| Oy Premier Brands Ltd | Wholesale & retail | 2013 |
| Oy Prior Ab | Manufacturing | 1991 |
| Oy Procean Ab | Water & waste | 2013 |
| Oy Renorak Ab | Construction | 1986 |
| Oy Rogersound Ab | Professional & scientific | 2006 |
| Oy Rohdos Kokkola Hälsa Ab | Wholesale & retail | 2015 |
| Oy Rova-Rest Ab | Hospitality | 1992 |
| Oy Rova-Rest Ab kiinteistö | Real estate | 2020 |
| Oy SKI-Kiinteistöt Ab | Real estate | 2020 |
| Oy SWS-Tuote Ab | Manufacturing | 1978 |
| Oy Serikokkola Ab | Manufacturing | 1989 |
| Oy Tendek Technology Ab | Wholesale & retail | 1988 |
| Oy Teollisuushankinta T H Ab | Wholesale & retail | 1992 |
| Oy Thylins Consulting Ab | Professional & scientific | 1978 |
| Oy Transport Tekos Ltd. | Transport & logistics | 2014 |
| Oy Wihveli Ab | Real estate | 1996 |
| Oy Östman Trading Ab | Wholesale & retail | 2000 |
| Oyj Ahola Transport Abp | Transport & logistics | 2009 |
| P Tylli Invest Ab Oy | Financial services | 2023 |
| P-E Witick Oy | Other services | 2012 |
| P. Appelgren Oy | Wholesale & retail | 2017 |
| P. Kuusela OY | Wholesale & retail | 1995 |
| PH-Wheels Oy | Manufacturing | 2014 |
| PINKBLUE OLIVE Oy | Hospitality | 2014 |
| PINSER ,Power Install Service Oy | Manufacturing | 2020 |
| PJ Spring Oy | Manufacturing | 2004 |
| PK Nuohous ja kiinteistötyöt Oy | Administrative & support | 2000 |
| PK-Ideat Oy | Construction | 2020 |
| PKK Invest Oy | Real estate | 2020 |
| PKK Kiinteistöt Oy | Real estate | 2024 |
| PKK Sähkö Oy | Construction | 2025 |
| PM House Oy | Professional & scientific | 2009 |
| Pohjanmaan Best-Food OY | Hospitality | 2018 |
| PR-Sähkötyö Pekka Rantala Oy | Construction | 1992 |
| PS Nostopalvelu Kokkola Oy | Transport & logistics | 2024 |
| PSI Clean Oy | Administrative & support | 2023 |
| PSPH-Maalaus Oy | Construction | 2003 |
| PTL Travels Oy | Transport & logistics | 2020 |
| PTN Kiinteistöt Oy | Real estate | 2026 |
| PaaPii Design Oy | Professional & scientific | 2013 |
| Paljakka Oil & Service Oy | Wholesale & retail | 2018 |
| Paljakka Skivillas Oy | Real estate | 2014 |
| Palkinto-Keisari Oy | Wholesale & retail | 2014 |
| Palkinto-Koivio Oy | Wholesale & retail | 2003 |
| Palloiluhalli H. Nyman Oy | Real estate | 2014 |
| Palmulahti Oy | Wholesale & retail | 2011 |
| Palvelutaksi Remesaho Oy | Transport & logistics | 2021 |
| Pan Invest Oy | Real estate | 2008 |
| Pantor Oy | Construction | 1994 |
| Panu Ahonen Oy | Administrative & support | 2004 |
| PanuRAK Oy | Construction | 2026 |
| Parkas Oy | Real estate | 2015 |
| Parlapa Oy Ab | Real estate | 1993 |
| Parttitukku Oy | Wholesale & retail | 1995 |
| Parturi-Kampaamo Clip Ky | Other services | 2010 |
| Pasin Tarviketukku Oy | Wholesale & retail | 2019 |
| Pata's Kök Ab | Hospitality | 2012 |
| Pd-Group Oy | Professional & scientific | 2011 |
| Peconra Oy | Construction | 1995 |
| Pecontec Oy | Wholesale & retail | 1992 |
| Pedrina's Bar Cantina avoin yhtiö | Hospitality | 1995 |
| Peero Ab | Information & communication | 2024 |
| Peike Oy | Real estate | 2023 |
| Pekka Manner Kommandiittiyhtiö | Hospitality | 1989 |
| Peltikulma-Kiinteistöt Oy | Real estate | 1995 |
| Peltisepänliike Rönnkvist Oy | Construction | 2007 |
| Peltola Invest Oy | Real estate | 2015 |
| Pendes Oy | Wholesale & retail | 2025 |
| Penesor Oy | Professional & scientific | 2017 |
| Perhesalonki Milana Avoin Yhtiö | Other services | 2018 |
| Pesula Kemkatti Oy | Other services | 2012 |
| Petabyte Oy | Information & communication | 2025 |
| Pete F Holding Oy | Construction | 2012 |
| Petri Vanhanen Ky | Wholesale & retail | 1999 |
| Peve-Sport Oy | Wholesale & retail | 1995 |
| Phrikthai Ravintola Oy | Hospitality | 2016 |
| Pia Hansén UtoPia Oy | Health & social care | 2008 |
| Pihladee Oy | Financial services | 2025 |
| Piiri Kit Oy | Information & communication | 2020 |
| Pikafix Oy | Other services | 2025 |
| PikeMed Oy | Health & social care | 2022 |
| Pikku Hetki - Snack & Pub Oy | Wholesale & retail | 2026 |
| Pimjalo, öppet bolag | Agriculture & fishing | 1979 |
| Pintava Oy | Construction | 2023 |
| Pintec Oy | Construction | 2023 |
| Pirjo Paananen Oy | Hospitality | 2014 |
| Pixelbricks Oy | Information & communication | 2021 |
| Pizro Oy | Real estate | 1989 |
| Pizza Vexi Oy | Hospitality | 1990 |
| Pizzeria Marziano Kokkola Oy | Hospitality | 2017 |
| Plandea Oy | Professional & scientific | 2016 |
| Plusfur Oy | Agriculture & fishing | 1975 |