| 2A Focus Oy | Administrative & support | 2026 |
| AA&NN Rakennus Oy | Construction | 2016 |
| AA-LUX Oy | Construction | 2009 |
| AA-tila Oy | Real estate | 2014 |
| AFWD Consulting Oy | Information & communication | 2021 |
| AHN-Production Oy | Real estate | 1991 |
| AJM Center Oy | Wholesale & retail | 2022 |
| AKR Data Oy | Wholesale & retail | 1999 |
| AN-Tilipalvelu Oy | Professional & scientific | 2025 |
| AV-Asennus Alander Oy | Construction | 2007 |
| Aapo Vainio Oy | Construction | 2005 |
| Ab. Godenhielm & Co. Oy. | Professional & scientific | 1948 |
| Ace of Case Oy | Education | 2012 |
| Agrosa Oy | Wholesale & retail | 2008 |
| Ahti Palonen Ky | Construction | 2011 |
| Aina Holding Oy | Manufacturing | 2006 |
| Ainoco Oy | Financial services | 2026 |
| Alastaro Golf Oy | Arts & recreation | 2005 |
| Aleksi Marketing Ky | Wholesale & retail | 1998 |
| Alfarit Oy | Real estate | 1989 |
| Allan Sepponen Oy | Construction | 2009 |
| Allebram Oy | Financial services | 2012 |
| AluConstruction Oy | Construction | 2021 |
| Ansfix Oy | Manufacturing | 2025 |
| Antin Metsä ja Kulku Oy | Agriculture & fishing | 2026 |
| Antti Poussa Oy | Construction | 2021 |
| Apumiespalvelu-AMP Oy | Administrative & support | 2023 |
| Arctic Flash Trading Oy | Wholesale & retail | 2017 |
| Aroi Group oy | Hospitality | 2024 |
| Arpman Hifi-Tekniikka Ky | Wholesale & retail | 1989 |
| Arssoll Finland Oy | Wholesale & retail | 2023 |
| Asennusliike Hongisto Oy | Construction | 2026 |
| Asianajotoimisto Aleksi Knuutila Ky | Professional & scientific | 1989 |
| Asianajotoimisto Heikki Rantanen Oy | Professional & scientific | 1995 |
| AudioAgents Oy | Information & communication | 2020 |
| Auran Tili ja Kiinteistö Oy | Professional & scientific | 1984 |
| Auto- ja Konekorjaamo APA Oy | Other services | 1991 |
| Auto- ja Koneliike AKR Oy | Wholesale & retail | 1990 |
| Autohuolto Maunu Ky | Other services | 1989 |
| Autosähköpiste Oy | Other services | 1989 |
| Autrics Oy | Professional & scientific | 2013 |
| Avm-Yhtiöt Oy | Professional & scientific | 2025 |
| Avoin yhtiö TB-Huolto Pihlajasaari | Wholesale & retail | 1991 |
| B & J Company Oy | Wholesale & retail | 2013 |
| BBQ & Cafe Shanghai Oy | Hospitality | 2017 |
| BMB Rakennuspalvelu Oy | Construction | 2020 |
| BigQ Oy | Professional & scientific | 2024 |
| Black Start Oy | Energy | 2024 |
| Blue Onion Oy | Information & communication | 2015 |
| Boxtalli Oy | Construction | 2008 |
| C-kassu Oy | Wholesale & retail | 2016 |
| Cartem Oy | Manufacturing | 1986 |
| Catering Jenni Kokkosuo Oy | Hospitality | 2019 |
| Catering PP Pakkaspojat Oy | Hospitality | 2018 |
| Catnap Oy | Hospitality | 1995 |
| Cetram Oy | Wholesale & retail | 2014 |
| Chenespace Oy | Wholesale & retail | 2013 |
| CloudCloud Oy | Education | 2018 |
| Cultum Oy | Wholesale & retail | 2015 |
| D.L. Hitsaaja Oy | Manufacturing | 2022 |
| Dinolift Oy | Manufacturing | 2023 |
| Dnanne Oy | Administrative & support | 2009 |
| Domereal Oy | Real estate | 2008 |
| Dometal Oy | Manufacturing | 2008 |
| Dröm Havet Oy | Wholesale & retail | 2017 |
| EL Lämpötekniikka Oy | Construction | 2023 |
| EMK-Yhtiöt Oy | Wholesale & retail | 2024 |
| Eastern Dragon Kiinalainen Ravintola Ky | Hospitality | 2010 |
| Eevamaija Ky | Manufacturing | 1979 |
| Eklund Art Factory Oy | Professional & scientific | 1993 |
| Ekosata Oy | Manufacturing | 2009 |
| Elontie Oy | Real estate | 2021 |
| Erikoislaukku Oy - Specialbags Ltd | Manufacturing | 2017 |
| Esailex Oy | Wholesale & retail | 2024 |
| Esko Peiponen Oy | Manufacturing | 1995 |
| Fast Finance Finland Oy | Real estate | 2021 |
| Feel Bike Oy | Manufacturing | 2020 |
| Fiksu Väri Oy | Manufacturing | 2023 |
| Finatop Oy | Professional & scientific | 2014 |
| Finden Oy | Financial services | 2026 |
| FinnBearing Oy | Wholesale & retail | 2025 |
| Flexmarketing Oy | Wholesale & retail | 2021 |
| Floor Solutions Oy | Construction | 2018 |
| Forssan Kauppakeskus Oy | Real estate | 1994 |
| Franselli Oy | Manufacturing | 2026 |
| Goose Family Group Oy | Real estate | 2026 |
| Green Division Oy | Manufacturing | 1999 |
| Gruman Oy | Financial services | 2019 |
| H & O Palvelut Avoin Yhtiö | Construction | 2013 |
| HA- Kiinteistöt Oy | Real estate | 2008 |
| HKR Automaatio Oy | Construction | 1960 |
| Haico Oy | Manufacturing | 1991 |
| Hakevirta Oy | Agriculture & fishing | 2012 |
| Hammasklinikka Valkee Oy | Health & social care | 2024 |
| Hampaamo Oy | Health & social care | 2022 |
| Hanna Collin Oy | Professional & scientific | 2025 |
| Helppo Suomi Oy | Administrative & support | 2025 |
| Hissihuolto ja Sähköasennus Heinonen Oy | Construction | 2017 |
| Hoda Oy | Construction | 2018 |
| Hotelli Vihannonkulma Oy | Real estate | 2019 |