| 1099 Sari Rämö Oy | Wholesale & retail | 2014 |
| AJR Invest Oy Ab | Real estate | 2022 |
| ANB Holding Oy | Real estate | 2025 |
| Anders Winberg Ky Kb | Professional & scientific | 2000 |
| Autohuolto Kuutti Ky | Other services | 1984 |
| BaanaSell Oy | Wholesale & retail | 2026 |
| Black Beard Company Oy | Professional & scientific | 2012 |
| Brandt Design Oy | Manufacturing | 2023 |
| Bygg och Planering - Rakennus ja Suunnittelu Kb R. FyhrqvistKy | Construction | 1988 |
| Chapel Harbour Golf avoin yhtiö | Arts & recreation | 2020 |
| Disponentbyrå ANNI Ab | Real estate | 2025 |
| Elli ja Tytöt Oy | Financial services | 2019 |
| Erfin Oy | Financial services | 2023 |
| Esa Nieminen Production Oy | Information & communication | 1998 |
| EverGreen Health Group Oy | Wholesale & retail | 2024 |
| Fendeks Oy Ab | Hospitality | 2021 |
| Filterpak Oy Ab Ltd | Manufacturing | 1994 |
| Fin-Al Trading Oy | Real estate | 2018 |
| Flexlift Oy | Construction | 2008 |
| Friday Capital Oy | Information & communication | 2017 |
| Granströms Båtvarv Oy | Manufacturing | 1985 |
| Hangon Maa ja Vesirakennus Oy | Construction | 2009 |
| Hangö Bokföringsbyrå Ab | Professional & scientific | 2008 |
| Hanko Blue Oy | Real estate | 2024 |
| Hanko Green Oy | Wholesale & retail | 2023 |
| Hanko Industrial Consulting ky | Professional & scientific | 1985 |
| Helmer Modig Oy | Transport & logistics | 1990 |
| Heros Oy | Construction | 1993 |
| Insinööritoimisto Björn Peltonen Ingenjörsbyrå Oy Ab | Professional & scientific | 2018 |
| JBos Hanko Oy | Financial services | 2021 |
| Kimkon Oy Ab | Construction | 2025 |
| Kronoholmarna Oy | Real estate | 1975 |
| Laiturin Laiturit Oy | Arts & recreation | 2021 |
| Libraria Ab Oy | Information & communication | 2023 |
| LiigU Oy | Administrative & support | 2019 |
| Linda Boating Oy | Transport & logistics | 2020 |
| Lohvander Oy | Construction | 2020 |
| M & L Patent Oy Ab | Professional & scientific | 2012 |
| M.A.D. Solutions Oy | Construction | 2022 |
| MF Consulting Oy | Professional & scientific | 2020 |
| MK Consept Oy | Professional & scientific | 2023 |
| Minikat Oy | Professional & scientific | 2014 |
| Murningstjänst R. Malmlund Kb | Construction | 1982 |
| Museibyggarna Museorakentajat Ab Oy | Arts & recreation | 2026 |
| Nordic Solutions Finland OY Ltd | Real estate | 2018 |
| Nordlund fastigheter Ab | Real estate | 2021 |
| OPEA Avoin yhtiö | Education | 2001 |
| Oceanside Oy | Manufacturing | 2023 |
| Open Sky Summer Festivals Oy Ab | Arts & recreation | 2021 |
| Oy Aeon Lindström Ab | Professional & scientific | 2015 |
| Oy Aino Söderström Ab | Real estate | 1994 |
| Oy Chyde Invest Ab | Real estate | 2015 |
| Oy Concept Development Ltd | Professional & scientific | 1977 |
| Oy HolmMediaData Ab | Information & communication | 2019 |
| Oy JML Oil Recovery Ab | Professional & scientific | 2020 |
| Oy Litorale Ab | Information & communication | 1995 |
| Oy Nordströms El Ab | Construction | 2007 |
| Oy Tedmark Invest Ab | Financial services | 1986 |
| Pekkuva Oy | Wholesale & retail | 1995 |
| Purjehdusklubi Seaface Oy | Administrative & support | 1983 |
| Rafla Henksu Oy | Administrative & support | 2025 |
| Ravintola Peperone Oy | Hospitality | 1984 |
| Real Haus Oy | Real estate | 2005 |
| Rinnovare oy | Construction | 2024 |
| Royal Mint Records Oy | Manufacturing | 2025 |
| Southside Software Ab | Information & communication | 2026 |
| Street Movies AB filial i Finland | Information & communication | 2012 |
| Sundqvist Investments Oy Ab | Transport & logistics | 2010 |
| Södergårdsgatan Holding Ab | Financial services | 2026 |
| Tenala Svetsmontering Kb - Tenholan Hitsausasennus Ky | | 1987 |
| Theo's VVS - Theo'n LVI Ab | Construction | 2026 |
| Tobbes Ab | Construction | 2023 |
| TonyPadel Oy | Arts & recreation | 2022 |
| Transito R Grahn Ab Oy Ltd | Transport & logistics | 1994 |
| Underwater Suomi Oy | Manufacturing | 2024 |
| Unique Travel World Oy | Administrative & support | 2022 |
| VANTAA ELECTRONICS MANUFACTURING Oy | Manufacturing | 2026 |
| Vanha Veistämö Oy | Manufacturing | 2020 |
| Varustamo Origo Oy | Hospitality | 1999 |
| Warrant Art Lab Oy Ab | Information & communication | 2025 |
| hootappi oy | Professional & scientific | 2020 |
| sturefjadercompany oyab | Professional & scientific | 2024 |