| FIIKA Ab Oy | Hospitality | 2017 |
| Fire Brothers AB | Wholesale & retail | 2021 |
| FKD Invest Oy | Real estate | 2020 |
| FP Improvement Oy | Professional & scientific | 2010 |
| FS-service Oy | Construction | 2021 |
| FTM Holding Ab | Real estate | 2020 |
| FU2RUM Ab | Financial services | 2018 |
| FVM-Service Ab | Construction | 2004 |
| Fabulous and Young OÜ filialen i Finland | Other services | 2015 |
| Fallskärs Vattenandelslag | Water & waste | 2024 |
| Fast. Ab Spitusvängen | Real estate | 2021 |
| Fast. Ab Svenska Gården Jakobstad Oy | Real estate | 2024 |
| Fastighets Ab Bulderbacka | Real estate | 1998 |
| Fastighets Ab Ebba Kiinteistö Oy | Construction | 2014 |
| Fastighets Ab Elim Kyrkan | Real estate | 2000 |
| Fastighets Ab Esse Mejeri | Real estate | 1989 |
| Fastighets Ab Familjestallet-Perhetalli Kiinteistö Oy | Real estate | 2007 |
| Fastighets Ab Glashuset | Real estate | 1995 |
| Fastighets Ab HT-3 Hallen i Jakobstad | Real estate | 2021 |
| Fastighets Ab Hamngatan 2 Kiinteistö Oy | Real estate | 1973 |
| Fastighets Ab Jakobstads Bäckvägen 13 - Kiinteistö Oy Pietarsaaren Purotie 13 | Real estate | 2010 |
| Fastighets Ab Karviksgatan 15 Kiinteistö Oy | Real estate | 1989 |
| Fastighets Ab Korsmosståget 12 i Jakobstad | Real estate | 2005 |
| Fastighets Ab Kruunumaja - Kronoby Fjällstuga | Real estate | 2000 |
| Fastighets Ab Kvarnen Kiinteistö Oy | Hospitality | 1994 |
| Fastighets Ab L-M Nygård | Real estate | 1994 |
| Fastighets Ab Majsol | Real estate | 2018 |
| Fastighets Ab Marstrand i Jakobstad Kiinteistö Oy | Real estate | 2008 |
| Fastighets Ab Movägen 2 i Jakobstad Kiinteistö Oy | Real estate | 2007 |
| Fastighets Ab Mästasvägen 2 i Jakobstad Kiinteistö Oy | Real estate | 2009 |
| Fastighets Ab Raman | Real estate | 2007 |
| Fastighets Ab Solkulla | Real estate | 1990 |
| Fastighets Ab Spituholmen | Real estate | 1976 |
| Fastighets Ab Storgatan 5 Jakobstad | Real estate | 1998 |
| Fastighets Ab Vagnsmakarevägen 8, Jakobstad | Real estate | 1997 |
| Fastighetsaktiebolag Skatagården Ab | Real estate | 2014 |
| Fastighetsbolag Brisa Ab Oy | Real estate | 2017 |
| Fastighetsbyrå Versum Ab | Real estate | 1991 |
| Faunaboards Ab | Wholesale & retail | 2020 |
| Fellman-Holding Ab | Financial services | 2021 |
| Fin-Er Oy Ab | Manufacturing | 2020 |
| FinFish Oy Ab | Financial services | 2024 |
| FinSteam Ab Oy | Manufacturing | 2022 |
| Finkas Oy | Administrative & support | 2025 |
| Finskas Ab | Wholesale & retail | 2004 |
| Fiona Tukku Oy | Wholesale & retail | 2024 |
| Fit Jeppis Oy Ab | Arts & recreation | 2026 |
| Flax Invest Ab | Financial services | 2021 |
| Flink Engineering Ab Oy | Professional & scientific | 2012 |
| Flink Service Ab Oy | Professional & scientific | 2002 |
| Forsberg Printed Communication Oy Ab | Manufacturing | 1995 |
| Fouga Software Oy | Information & communication | 2015 |
| Four Investor Ab | Construction | 2005 |
| Fram Equity Oy Ab | Professional & scientific | 2025 |
| Frej Björklund Oy | Manufacturing | 2002 |
| Freya Care Ab | Health & social care | 2024 |
| FurLink Ab Oy | Wholesale & retail | 2026 |
| Furu-Rak Öppet Bolag | Arts & recreation | 2010 |
| FÄBODA EXPERIENCE Ab Oy | Professional & scientific | 2018 |
| G Snellman Consulting Oy Ab | Professional & scientific | 2005 |
| G&A Solutions Ab Oy | Professional & scientific | 2017 |
| GA Estate Ab | Financial services | 1990 |
| GA Products Oy | Manufacturing | 2019 |
| GCH-Berry Ab | Wholesale & retail | 2025 |
| GE-VE Invest Ab | Real estate | 2019 |
| Garage 88 Service Ab | Other services | 2024 |
| Geneva Invest Ab | Real estate | 2020 |
| Glas-Service Lund Ab | Construction | 1979 |
| Gloss Systems Oy | Manufacturing | 2024 |
| Gloveit Ab Oy | Arts & recreation | 2026 |
| Go-track FINLAND Oy | Wholesale & retail | 2018 |
| Gourmet Garage Ab | Hospitality | 2020 |
| Graceful AI Ab | Professional & scientific | 2019 |
| Granholmens Tvätteri Ab Oy | Other services | 2018 |
| Grankulla Fastighets Ab | Real estate | 2008 |
| Gröns vinbar Ab Oy | Hospitality | 2026 |
| Guldkusten Ab | Professional & scientific | 1989 |
| Gunnevis Hemtvätt Ab | Other services | 2000 |
| H & T Liimatainen Oy | Transport & logistics | 1975 |
| H Östman KB | Transport & logistics | 1974 |
| H-Kaskinen Oy | Professional & scientific | 2019 |
| H. Hakanen Kb | Transport & logistics | 1997 |
| H3 Holding Oy | Financial services | 2014 |
| HAB Tomtbolag Ab Oy | Real estate | 1997 |
| HCJM Invest Ab | Other services | 1968 |
| HD Trade Oy | Administrative & support | 2021 |
| HG CRAFT Oy | Manufacturing | 2021 |
| HOLMAG Ab | Professional & scientific | 2020 |
| Holmbäcks Rörservice AB | Construction | 2022 |
| HR Avdelningen Ab | Professional & scientific | 2024 |
| HS Entreprenad Ab | Construction | 2021 |
| HS Group Ab | Professional & scientific | 2019 |
| HS-Elec Oy | Construction | 2004 |
| HT Fastigheter Ab | Construction | 2005 |
| HT Fastigheter Bockholmsvägen 6 Ab | Real estate | 2013 |
| HVAC Consult B2B Oy | Wholesale & retail | 2017 |
| Haglund & Lukkarila öppet bolag | Arts & recreation | 2003 |
| Hagsons Fastigheter Ab | Real estate | 2018 |
| Halla Living Oy | Wholesale & retail | 2025 |
| Halli K.S. Kirsilä Oy | Real estate | 2014 |