| 1829 Joni Grundström Oy | Wholesale & retail | 2023 |
| 1Mokka Club Finland Oy | Wholesale & retail | 2015 |
| A&N Invest Oy Ab | Real estate | 2022 |
| AH-Energy Ab Oy | Construction | 2025 |
| Ahl Infra OY AB | Construction | 2017 |
| AL-Autonpesupalvelut Oy | Other services | 2023 |
| Annkriss Rakennus OY | Administrative & support | 2010 |
| Ab Agneta Nordberg Oy | Wholesale & retail | 2009 |
| Ab Aurora Career Opportunities Finland Oy | Other services | 2023 |
| Ab Bilskola Trexo Autokoulu Oy | Education | 1967 |
| Ab Bomiljö Oy | Construction | 2021 |
| Ab Börs Karis-Karjaa Oy | Real estate | 1999 |
| Ab Ekenäs-Grönsaksagentur Oy | Wholesale & retail | 1995 |
| Ab Karis Lastbilscentral - Karjaan Kuorma-autokeskus Oy | Transport & logistics | 1975 |
| Ab Malmkulla Industrifastigheter | Real estate | 1987 |
| Ab RM Service Oy | Administrative & support | 2018 |
| Ab Schaktra Oy | Administrative & support | 1981 |
| Ab Uffes Oy | Real estate | 1991 |
| Ab Västnylands Tanktransport-Länsiuudenmaan Tankkikuljetus Oy | Transport & logistics | 2001 |
| Ab Wadenström & Koskinen Oy | Hospitality | 2013 |
| Ab Werthmann Oy | Other services | 1977 |
| Add Oy Ab | Professional & scientific | 2020 |
| Ahlfors & Granström Kb | Wholesale & retail | 1987 |
| Ahlsa Fastigheter Ab | Wholesale & retail | 2009 |
| AjalinIn Oy | Financial services | 2020 |
| Aktielagret Ab | Financial services | 2005 |
| Alexia Building Oy Ab | Real estate | 2021 |
| Alexia Performance Oy Ab | Arts & recreation | 2020 |
| Aligned Strategy Oy | Professional & scientific | 2025 |
| Anno Media Oy | Professional & scientific | 2014 |
| Annuska, Anna-Lisa Eriksson kommanditbolag | Wholesale & retail | 1978 |
| Ansos Oy | Administrative & support | 2016 |
| Arkkitehtitoimisto K J-A Oy | Professional & scientific | 2020 |
| Arton Paja ky | Manufacturing | 1981 |
| Arvoan Oy | Information & communication | 2022 |
| Astras Oy | Administrative & support | 2020 |
| Autohuolto Ilkka Juurinen Ky | Wholesale & retail | 1988 |
| Automaattisorvaamo A. Lehtola seur. Oy | Manufacturing | 2005 |
| Avoin yhtiö J & M Korpimäki | Administrative & support | 1983 |
| Avoin yhtiö R.V.T Auto | Other services | 1990 |
| Axxell Utbildning Ab | Education | 2006 |
| Bejor OY | Hospitality | 2021 |
| BL Invest Oy | Real estate | 2023 |
| Boost Cut Customs OY | Construction | 2025 |
| Baaij Oy | Administrative & support | 2021 |
| Begravningsbyrå Artzén & Co Ab | Other services | 2024 |
| Best Car Consulting Oy | Wholesale & retail | 2019 |
| Billnäs Bokföring Ab | Professional & scientific | 1988 |
| Billnäs Byggtjänst Ab | Construction | 1995 |
| Billnäsin Ruukin Kiinteistöt Oy - Billnäs Bruks Fastigheter Ab | Real estate | 1987 |
| Birk Lerviks Solutions Ab | Information & communication | 2022 |
| Bjökä Ab | Manufacturing | 2025 |
| Blombänk Oy | Professional & scientific | 2025 |
| Bokföring & Data Consulting Bilenberg Kb | Professional & scientific | 1981 |
| Bokföring & Revision Söderberg Oy | Professional & scientific | 1990 |
| Bokföring P-E Nyberg Kb | Professional & scientific | 1988 |
| Bokföringsbyrå Karis Ekonomitjänst Kb | Professional & scientific | 1996 |
| Bollsta lift trans Oy Ab | Transport & logistics | 2006 |
| Bolon Finland Oy | Administrative & support | 2015 |
| Borgs Glas Oy Ab | Manufacturing | 2022 |
| Byggtjänst o. Husförmedling, Leif Friberg Kommanditbolag | Real estate | 1980 |
| C-E Grönroos Oy Ab | Construction | 2020 |
| C. Winberg Kb Ky | Construction | 1991 |
| Casa Consulting OY AB | Construction | 2010 |
| CD Santok Oy | Construction | 2019 |
| CL VVS LVI Oy Ab | Construction | 2026 |
| Cape Economy Oy Ab | Professional & scientific | 2012 |
| Carassio Oy | Professional & scientific | 2025 |
| Carleo arkitekter Ab | Professional & scientific | 2016 |
| Carpcom AB | Wholesale & retail | 2020 |
| CarpusMedia Ab | Professional & scientific | 2018 |
| Christers Byggtjänst Ab | Construction | 1993 |
| Christian Norrgård Ab Oy | Hospitality | 2001 |
| Clean Spirit Oy | Administrative & support | 2020 |
| Club18 Karis Ab | Hospitality | 2010 |
| Corein Oy | Professional & scientific | 2003 |
| Dintech OY | Wholesale & retail | 2015 |
| DYNAMICS Software Avoin Yhtiö | Information & communication | 2005 |
| Day N nite Entertainment Oy Ab | Arts & recreation | 2024 |
| Demir Steel Oy | Manufacturing | 2018 |
| Deplano Ky | Professional & scientific | 1973 |
| Design-Invest Oy | Professional & scientific | 1990 |
| Designavi Oy Ab | Information & communication | 2020 |
| DiGu Oy | Wholesale & retail | 2025 |
| Diametri Oy | Construction | 1995 |
| Digital Teaching Tools Finland Ab | Information & communication | 2020 |
| Digitally Enlightened Oy | Information & communication | 2020 |
| Dönsby Services kb | Hospitality | 2009 |
| Easy Productions OY | Information & communication | 2017 |
| EK-Automatic Oy | Construction | 2023 |
| Ek-Market Ab Quercus Oy | Wholesale & retail | 1981 |
| Eksola Oy | Wholesale & retail | 1982 |
| Electricboogi Oy | Construction | 2020 |
| Espoon Puhdistus Oy Esbo Rening Ab | Administrative & support | 1984 |
| Etelälinkki Oy | Information & communication | 1990 |
| Europainter oy | Construction | 2020 |
| Eurostep Oy | Information & communication | 1995 |
| ExPro Group avoin yhtiö | Professional & scientific | 2021 |
| FAb Karis hyresbostäder - Karjaan vuokra-asunnot KOy | Real estate | 1994 |
| FL-Music Avoin yhtiö | Manufacturing | 1996 |