| 1593 Merja Auvinen Oy | Wholesale & retail | 2017 |
| 1764 Niina Lehtoranta Oy | Wholesale & retail | 2021 |
| A. Maléns fisk kb | Agriculture & fishing | 2019 |
| AG Marine Group Oy | Manufacturing | 2010 |
| ALV Trade OY | Wholesale & retail | 2022 |
| Aarrenlämpö Oy | Energy | 1975 |
| Ab Costacalida Oy | Administrative & support | 1989 |
| Ab Drottningberg Oy | Real estate | 2012 |
| Ab Fastighetsbyrå-Hangete-Kiinteistötoimisto Oy | Professional & scientific | 2001 |
| Ab Haga Systems Oy | Professional & scientific | 1997 |
| Ab Lavendel Services Oy | Other services | 2018 |
| Ab Lillolle Oy | Real estate | 2008 |
| Ab Steelstudio Oy | Arts & recreation | 2001 |
| Ab Stigu Oy | Financial services | 1982 |
| Ab tandläkarmottagning Cecil Svanbäck-hammaslääkärivastaanotto Oy | Health & social care | 2008 |
| Aboxia Oy | Wholesale & retail | 1997 |
| Aderno Oy | Financial services | 2006 |
| Ag Marine Hanko Oy | Manufacturing | 2018 |
| Airputs Oy | Administrative & support | 1990 |
| Aktiebolaget Snåldöhamn | Real estate | 1955 |
| Alpha BIO Oy | Manufacturing | 2023 |
| Alvent Oy | Administrative & support | 2026 |
| Ant Tehdas Oy | Other services | 2026 |
| Apsola Trading OY | Wholesale & retail | 2022 |
| Apsola avoin yhtiö | Wholesale & retail | 2017 |
| Archipelagia Expeditions Oy | Other services | 2022 |
| AsUsual Oy | Professional & scientific | 2021 |
| Autolink Finland Oy | Transport & logistics | 2009 |
| Axel Liljefors Oy Ab Ltd | Wholesale & retail | 1991 |
| BEH-Consulting Oy | Real estate | 2024 |
| Bali the Dog Ab | Wholesale & retail | 2017 |
| Barraquito Oy | Financial services | 2023 |
| Bed & Breakfast Villa Aurora Oy | Hospitality | 2020 |
| Bill Baarman Oy Ab | Transport & logistics | 2017 |
| Bränn & Bränn Osakeyhtiö - Bränn & Bränn Aktiebolag | Professional & scientific | 2002 |
| C & E Rosenberg Oy | Hospitality | 2021 |
| Café Bellis OY | Hospitality | 2021 |
| CSM-Capital Oy Ab | Health & social care | 2021 |
| Cafetering Oy | Hospitality | 1992 |
| Cafferie Oy Ab | Other services | 2012 |
| Café Triton Öppet bolag | Hospitality | 1996 |
| Century Films Oy | Information & communication | 2004 |
| Chia Food Company Oy | Wholesale & retail | 2020 |
| CoachMee Oy | Professional & scientific | 2024 |
| Coast Burgers Kb | Hospitality | 1999 |
| Cosmox Ky | Information & communication | 2001 |
| Desmond Oy Ab | Real estate | 1994 |
| DiagFactor Oy | Professional & scientific | 2015 |
| Digidc Oy | Information & communication | 2025 |
| Digikonttori Kiertotalous Oy | Professional & scientific | 2024 |
| Doxie Oy | Information & communication | 2019 |
| Dualco Oy | Health & social care | 2016 |
| EDT Finland Oy | Wholesale & retail | 2022 |
| ELRAK Oy | Construction | 2023 |
| EPES Oy | Hospitality | 2023 |
| En Wildmark Oy | Agriculture & fishing | 2016 |
| Etelä-Suomen kaivinpalvelu Ky | Construction | 2009 |
| Eteläkärjen Automaalaamo Oy | Other services | 2006 |
| Eteläkärjen kiinteistöhuolto Oy | Administrative & support | 1997 |
| Eteläreimari Oy | Manufacturing | 2004 |
| Europe Dentist Oy | Health & social care | 2017 |
| Euroports Hanko Oy | Transport & logistics | 1912 |
| Exotic Food Tannus Oy | Hospitality | 2009 |
| FC HIK Oy Ab | Transport & logistics | 2021 |
| FHA Oy | Manufacturing | 2021 |
| Fastighets Ab Rosenhill | Real estate | 2009 |
| Fastighets Ab Skäggfrans Kiinteistö Oy | Real estate | 1977 |
| Fastighets Ab Torsken Kiinteistö Oy | Real estate | 1975 |
| Fastighets Ab Täktom Torpet | Administrative & support | 2000 |
| Fastighets Ab Villa Uggla | Real estate | 1989 |
| Fastighets Ab Ålen Kiinteistö Oy | Real estate | 1975 |
| Fastighetsbolaget Björklid Ab | Real estate | 1996 |
| Fastighetsservice Tullis Ab | Administrative & support | 2022 |
| Fastruoka Oy | Hospitality | 2021 |
| First Venture Ky | Hospitality | 2007 |
| Flowers & Green Ky | Wholesale & retail | 2022 |
| Forcit Defence International Oy Ab | Manufacturing | 2023 |
| Forcit International Oy Ab | Wholesale & retail | 2013 |
| Foto R. Kuittinen Ky | Wholesale & retail | 1982 |
| FoundryWorks Finland Oy | Professional & scientific | 2026 |
| Fyren Helsinki Oy | Professional & scientific | 2013 |
| Gambol Oy | Information & communication | 2023 |
| Global Alliance for Projects (GAP) Oy | Wholesale & retail | 1956 |
| Grönan Oy | Hospitality | 1996 |
| H&H Isännöinti Oy | Real estate | 2022 |
| HPT Ilmastointi Oy | Construction | 1969 |
| HTL-Service Oy | Construction | 2010 |
| HaVet Oy | Professional & scientific | 2024 |
| Hammaskaksikko Oy | Health & social care | 1998 |
| Han-Golf Oy Ab | Arts & recreation | 2000 |
| Hangon Kangaspuoti Oy | Wholesale & retail | 2023 |
| Hangon Läntinen Laituri Oy | Real estate | 2019 |
| Hangon Nyc 3 Oy | Real estate | 2013 |
| Hangon Rahtiasema Oy | Transport & logistics | 1972 |
| Hangon Rakennustoimisto Oy | Construction | 2021 |
| Hangon Rakentajat Oy | Construction | 1979 |
| Hangon Remonttipuusepät Iivonen & Iivonen Avoin Yhtiö | Construction | 1985 |
| Hangon Satama - Hangö Hamn Oy Ab | Transport & logistics | 2013 |
| Hangon Siivous ja Huolto Ky | Administrative & support | 1992 |
| Hangon Terästekno Ky | Professional & scientific | 1989 |