| AB Fardenes&L Oy | Other services | 2022 |
| Billnäs Ingenjörsbyrå OY AB | Professional & scientific | 2017 |
| Benny Blomqvist Kb | Other services | 1985 |
| Billmet avoin yhtiö | Other services | 2000 |
| Billnäs Construction Oy Ab | Construction | 2020 |
| Billnäs Kraftverksvägen 1 Ab | Real estate | 2022 |
| Billnäs Reservdelsbank Ab | Wholesale & retail | 2019 |
| Billnäs Ridcentrum Ab | Arts & recreation | 1983 |
| Billnäs Taimisto-Plantskola Oy Ab | Agriculture & fishing | 1984 |
| Billnäs invest Ab | Real estate | 2020 |
| Billnäsin Ruukki Oy | Real estate | 2008 |
| Billnäsin ravintola ja nautinto Oy | Hospitality | 1990 |
| Byggtradition Ab | Real estate | 2016 |
| Comsense Oy | Professional & scientific | 2022 |
| Eden Billnäs Oy | Hospitality | 2022 |
| Fedeco Oy Ab Fiskars Environmental Development and Engineering Company | Professional & scientific | 1996 |
| FoHaCon Oy Ab | Information & communication | 2017 |
| Ginepro Oy | Professional & scientific | 2009 |
| Graafinen viestintätoimisto Kuu Oy | Professional & scientific | 1998 |
| Hjärnbruket Ab Oy | Professional & scientific | 2020 |
| Insinööritoimisto Sture Oy | Construction | 1990 |
| Invectis Oy | Real estate | 2021 |
| J Tuomainen Oy | Construction | 2012 |
| JADE MARIN Oy | Real estate | 2007 |
| JINO-FIX Oy | Construction | 2013 |
| Javanainen Consulting Oy | Information & communication | 2008 |
| Kaisa-Maria Laiho Oy | Arts & recreation | 2022 |
| Laxell Consulting Ab | Information & communication | 2020 |
| Little Garden Oy | Agriculture & fishing | 2016 |
| Livsakademi Oy Ab | Education | 2023 |
| MHM Finland OY | Professional & scientific | 2023 |
| Maanrakennus Tuomainen Ky | Construction | 2026 |
| Made by Emma Oy | Other services | 2023 |
| Matematik.fi Finland Ab | Education | 2014 |
| Nettilomake FI Oy | Information & communication | 2019 |
| NutrIQ Ab | Health & social care | 2022 |
| Oy JR-Center Ab | Arts & recreation | 2003 |
| Oy Kamarit Ab | Education | 2013 |
| Oy Liwo Ab | Information & communication | 1987 |
| SBE Service Ab Oy | Administrative & support | 2024 |
| The Natural Design Company Oy | Professional & scientific | 2018 |
| Thermo-Asennus Oy | Construction | 2021 |
| Westmarin Oy | Real estate | 2019 |
| Wood Mind avoin yhtiö | Manufacturing | 2017 |
| YOK Invest Ab | Real estate | 2020 |