| F & O Krohn öppet bolag | Construction | 2004 |
| FIN Infra Group Oy | Construction | 2022 |
| Fairway Studio Oy | Other services | 2022 |
| Fastighets Ab Företagarvägen 7 | Real estate | 1998 |
| Fastighets Ab Havets Hus | Real estate | 2008 |
| Fastighets Ab Korsholms Bostäder | Real estate | 1991 |
| Fastighets Ab Korsholms Företagsvägen 8 | Real estate | 2017 |
| Fastighets Ab M.Eckerman Kiinteistö Oy | Real estate | 2015 |
| Fastighets Foglia Ab Oy | Real estate | 2012 |
| Femely Capital Ab | Financial services | 1990 |
| FiftySixty Invest Oy | Financial services | 2021 |
| FiftySixty Properties Oy | Real estate | 2024 |
| Finesse Finland Oy | Manufacturing | 2005 |
| Fischi Ab | Information & communication | 2020 |
| Fresh Pro Oy Ab | Wholesale & retail | 2018 |
| Frontend Innovations Oy | Professional & scientific | 2020 |
| Globäck Invest Oy Ab | Professional & scientific | 2015 |
| Grade Holding Oy | Professional & scientific | 2022 |
| Grade Systems Oy | Information & communication | 2022 |
| Grafi Consult Oy | Professional & scientific | 1987 |
| Grasco Oy | Professional & scientific | 2022 |
| Gripen Wheels Finland Ab Oy | Wholesale & retail | 2009 |
| H J-Kiinteistöpalvelu Oy | Real estate | 1993 |
| H&F Partners Oy | Real estate | 2015 |
| HNUXLA Ab | Financial services | 2023 |
| HTT SixGen Oy Ab | Financial services | 2003 |
| Hallvar & Söderström Ab | Transport & logistics | 1978 |
| Hammasklinikka Tandklinik NyDent Oy Ab | Health & social care | 2012 |
| Hans Blomkvist Ab Oy | Real estate | 1975 |
| HealthCraft Oy | Health & social care | 2023 |
| Herea Oy | Professional & scientific | 2015 |
| Hinauskuljetus Lähdekorpi Oy | Transport & logistics | 1989 |
| Holmberg Holding Ab Oy | Professional & scientific | 2021 |
| Hyvän Olon Kauppa Eija Parkkila Oy | Financial services | 2004 |
| INGSVA Resor - Matkat Ab Oy | Administrative & support | 1977 |
| Ideavec Oy | Professional & scientific | 2008 |
| Infra-Lab Oy | Professional & scientific | 2014 |
| Ingves Invest Ab Oy | Transport & logistics | 1983 |
| Insane Empire Oy | Professional & scientific | 2020 |
| Investment K Lindgrén Ab | Financial services | 2002 |
| J. K. Steel Oy | Water & waste | 2015 |
| J. Vanharanta Oy | Hospitality | 2001 |
| JAPGas Oy | Professional & scientific | 2022 |
| JDA-Invest Oy | Real estate | 2021 |
| JJ Tools Oy Ab | Manufacturing | 2018 |
| JKV Holding Ab | Financial services | 2026 |
| JLT Group Oy Ab | Administrative & support | 2022 |
| JLT Services Oy Ab | Manufacturing | 2018 |
| JP Accounting Oy Ab | Professional & scientific | 2012 |
| Jakelu Yhtiö Vaasa Oy | Transport & logistics | 2024 |
| Jakobstads Trävaru Ab - Pietarsaaren Puutavara Oy | Wholesale & retail | 2007 |
| Jan Hautaoja Ky | Wholesale & retail | 1987 |
| Jelppis-Tiimi Osuuskunta | Health & social care | 1998 |
| Jordbyggnad Berglund öppet bolag | Construction | 2007 |
| Juratech Ky | Construction | 2016 |
| KA Invest Oy | Financial services | 2016 |
| KH Jamakari Oy | Professional & scientific | 1998 |
| KL-Engineering Oy | Professional & scientific | 2017 |
| KM Roofing Oy Ab | Construction | 2012 |
| KSK Group Oy Ab | Construction | 2017 |
| KSL Invest Oy | Real estate | 2015 |
| KVB Päls Ab | Agriculture & fishing | 1993 |
| Karina&Jussi Consulting Oy | Education | 2022 |
| Kaysa Living Oy/Ab | Real estate | 1990 |
| Kiinteistö Oy Ilola | Real estate | 2005 |
| Kiinteistö Oy JJ Hämäläinen | Real estate | 2012 |
| Kiinteistö Oy Kauppakuja 5 | Real estate | 2016 |
| Kiinteistö Oy Kauppatie 6 | Real estate | 2007 |
| Kiinteistö Oy Mustasaaren Hallitie | Real estate | 2025 |
| Kiinteistö Oy S. ja T. Autio Fastighets Ab | Real estate | 1984 |
| Kiinteistö Oy Speranza | Real estate | 2016 |
| Kiinteistö Oy Tiirak | Real estate | 2021 |
| Kiinteistö Oy VKK Sijoitus | Real estate | 2015 |
| Kiinteistö Oy Vaasan Kiitotie | Real estate | 2011 |
| Kiinteistö Oy Vuoriseppä | Real estate | 2012 |
| Kiinteistö Oy Vöyrin Rekipellontie 12-14 Ab | Real estate | 2015 |
| Kikapu Group Oy | Wholesale & retail | 2021 |
| Kind Life Oy | Professional & scientific | 2015 |
| KoiTu Oy | Wholesale & retail | 2025 |
| Koirakari Invest Oy | Real estate | 2015 |
| Kommandiittiyhtiö Lassen Radio-TV - Lasses Radio-TV Lars Erik Östergård Kommanditbolag | Wholesale & retail | 1978 |
| Kommanditbolag Planering Herrgård Suunnittelu Kommandiittiyhtiö | Professional & scientific | 1987 |
| Kommanditbolaget Beijar & Co Kommandiittiyhtiö | Construction | 1975 |
| Korsholms Busspark Ab | Real estate | 2011 |
| Korsholms Trätjänst Ab | Manufacturing | 2011 |
| Korsholms utvecklingsfastigheter Ab | Real estate | 2025 |
| Kotileipomo Hämäläinen Oy | Manufacturing | 2012 |
| Kvarkens Fastigheter Ab Oy | Real estate | 2021 |
| Kvarkens VVS Ab | Construction | 2018 |
| Ky Laakso & Köykkä Kb | Wholesale & retail | 1986 |
| L Jokela Oy Ab | Manufacturing | 1993 |
| L4M Partners Oy | Professional & scientific | 2017 |
| LMI Finland Oy Ab | Professional & scientific | 2016 |
| LN Move Oy | Transport & logistics | 2026 |
| Lasse G Ab Oy | Hospitality | 1946 |
| Lime & Blue Oy | Wholesale & retail | 2010 |
| Lindell Media Kb | Information & communication | 2026 |
| Lindell Travel Team Ab | Administrative & support | 2012 |
| Little Wardrobe Company Oy Ab | Manufacturing | 2025 |
| Litviikkilaari Oy | Financial services | 2021 |