| Erica-Grilli Oy | Hospitality | 1995 |
| Erikoislääkäri Markus Lindroos Oy | Health & social care | 2025 |
| Eriksson & Högdahl Oy | Transport & logistics | 1994 |
| Eriksson-Invest Oy Ab | Financial services | 2014 |
| Esa Siltaloppi Media Oy Ab | Information & communication | 1988 |
| Esikko Oy | Wholesale & retail | 2014 |
| Esko Johannes Paavola Oy | Financial services | 1987 |
| Espoon Kotiklinikka Oy | Health & social care | 2024 |
| Esse Vind Ab | Energy | 2019 |
| Esse-Matic Ky | | 1983 |
| Esselström Oy | Wholesale & retail | 2021 |
| Etab Electric Oy | Construction | 1993 |
| Etha Oy | Construction | 2002 |
| Etupelto Oy | Real estate | 2019 |
| EuroLithium Oy | Mining & quarrying | 2022 |
| EuroStaffing Solutions Ab | Administrative & support | 2021 |
| Eurofins bestLab Oy | Professional & scientific | 2016 |
| Euromare Oy | Real estate | 1992 |
| Evo Engineering Oy | Construction | 2016 |
| Exacore Oy Ab | Information & communication | 2019 |
| Exakt Diagnostik Ab | Health & social care | 2024 |
| Excosoft Oy | Professional & scientific | 2012 |
| Exetico Ab | Professional & scientific | 2016 |
| Exevi Oy | Professional & scientific | 1993 |
| Ezmina Oy | Financial services | 2022 |
| F Nordstrom Consulting Oy Ab | Professional & scientific | 2021 |
| F Riska Oy Ab | Professional & scientific | 2023 |
| F. Sport OY | Arts & recreation | 2023 |
| FAM-Rakennus Oy | Real estate | 2016 |
| FH Service Oy | Other services | 2022 |
| FIABA kuntoutus Oy | Health & social care | 2011 |
| FINEST Trading Oy | Wholesale & retail | 2018 |
| FINN-D ky | Professional & scientific | 2011 |
| FLOW Event Management Ab | Professional & scientific | 2026 |
| FM Konsult Oy | Health & social care | 2022 |
| FP-Kiinnike Oy | Wholesale & retail | 2026 |
| FRSH Nearby Ab | Wholesale & retail | 2026 |
| FTJ Nordic Purku & Saneeraus Oy | Construction | 2026 |
| FV Growth Enabler Ab | Real estate | 2025 |
| FW Holding Ab | Financial services | 2026 |
| FaLaLia Consulting Ab Oy | Health & social care | 2009 |
| Fahe Oy | Financial services | 2017 |
| Falk Finances Oy | Financial services | 2025 |
| Famdell Oy Ab | Professional & scientific | 2005 |
| Fantoy Oy Ab | Wholesale & retail | 1960 |
| Fasti Group Oy | Wholesale & retail | 2018 |
| Fastighets Ab Bisatsen Kiinteistö Oy | Real estate | 1974 |
| Fastighets Ab Folkhälsanhuset Wasas Parkering | Transport & logistics | 2013 |
| Fastighets Ab Formansgatan 14 Kiinteistö Oy | Real estate | 1978 |
| Fastighets Ab Graniten | Real estate | 2003 |
| Fastighets Ab Herrlinsbo Kiinteistö Oy | Real estate | 1988 |
| Fastighets Ab Karkmoröjtsor | Real estate | 2002 |
| Fastighets Ab Kronansvägen 2 | Real estate | 1990 |
| Fastighets Ab Kvevlax Affärshus | Real estate | 1988 |
| Fastighets Ab Plazentia | Real estate | 1988 |
| Fastighets Ab Svenska Gården i Lahtis | Real estate | 2017 |
| Fastighets Ab Tegelbruksgatan 5-7 | Real estate | 2000 |
| Fastighets Ab Vasa Fjällhus | Real estate | 1989 |
| Fastighets Ab Vasa Palazzos | Real estate | 1992 |
| Fastighets Ab Yttermalax Brinken | Real estate | 1971 |
| Fastighetsbolaget Eila Ab | Real estate | 1992 |
| Fastighetsbolaget Nygård & Björklund Ab | Real estate | 2012 |
| Fenda Oy | Wholesale & retail | 1998 |
| Fennotontit avoin yhtiö | Real estate | 2023 |
| FerruMed Oy | Health & social care | 2024 |
| Festalia Oy | Professional & scientific | 2014 |
| Fevia Fin Lab Oy Ab | Professional & scientific | 1988 |
| Fides-Invest Oy | Financial services | 1987 |
| Fiener Oy | Manufacturing | 2022 |
| Fiksut konsultit Oy Ab | Professional & scientific | 2026 |
| Filla Capital Oy | Financial services | 2026 |
| Finacs Oy | Professional & scientific | 2021 |
| Finadept Ab | Professional & scientific | 2019 |
| Finalti Oy | Professional & scientific | 2025 |
| Finance Consulting LMK Ab | Other services | 2011 |
| Finfonic Oy | Manufacturing | 2003 |
| Finhow Education Oy | Education | 2021 |
| Finkivi Oy | Mining & quarrying | 2018 |
| Finlandia Cleaning Services Ab | Administrative & support | 2020 |
| Finn-Teho Oy Ab | Wholesale & retail | 2005 |
| FinnRev Oy Ab | Professional & scientific | 2008 |
| Finnbox J. Oy | Transport & logistics | 2024 |
| Finnbox Post Oy | Transport & logistics | 2019 |
| Finnemans Snickeri Kb | Construction | 1989 |
| Finnfeeds Oy | Manufacturing | 1991 |
| Finnish Food Trading Company Oy | Wholesale & retail | 2012 |
| Finnåkersvägenin vesiosuuskunta/Finnåkersvägens vattenandelslag | Water & waste | 2017 |
| Fintekno Oy | Manufacturing | 1999 |
| Fintos Oy | Wholesale & retail | 2008 |
| Finvacon Oy | Manufacturing | 2005 |
| Fire Island Invest Ab | Transport & logistics | 2019 |
| Firmon Oy | Information & communication | 2025 |
| Fiskaffär Ruotsala Ab | Wholesale & retail | 2016 |
| Fiskdisken Vasa Ab Oy | Wholesale & retail | 2017 |
| Fiskets Hus Fastighets Ab | Real estate | 2018 |
| Five Pii Consulting Oy | Professional & scientific | 1998 |
| FixForce Group Oy Ab | Wholesale & retail | 2023 |
| Fixura Ab Oy | Financial services | 2009 |
| Fjoop Oy | Information & communication | 2023 |
| Fliq Oy | Information & communication | 2013 |