| A&M Tjänster Ab | Other services | 2019 |
| ASWO Suomi Oy | Wholesale & retail | 2016 |
| Ab Camilla Backlin Oy | Manufacturing | 2006 |
| Ab Cellpac Korsnäs | Manufacturing | 1992 |
| Ab Gabbe & Misses Oy | Real estate | 2015 |
| Ab Hofman & Co Oy | Manufacturing | 2008 |
| Ab Korsnäs Skalman Oy | Agriculture & fishing | 1994 |
| Ab Mr motors Korsnäs Oy | Wholesale & retail | 1992 |
| Ab Trädgård Hinjärv Puutarha Oy | Wholesale & retail | 2020 |
| Ab Williams Korsnäs Oy | Real estate | 1991 |
| Andelslaget Korsnäs Centralantenn | Information & communication | 1983 |
| Andtfolk & Co Ab | Transport & logistics | 1996 |
| Asher Ab | Information & communication | 2025 |
| Aucuparia Ab Oy | Administrative & support | 2021 |
| BN-Rör Kb | Construction | 1983 |
| BT Weld AB | Manufacturing | 2023 |
| Begravningsbyrå Sippus Hautaustoimisto Ab | Other services | 2023 |
| Bo Ekströms Pälsdjursfarm Ab | Agriculture & fishing | 1994 |
| Br. Bäcklund Kb | Manufacturing | 1990 |
| Bröderna Stens Pälsfarm Ab | Agriculture & fishing | 1984 |
| Bygg - Rakennus Olle Kb | Construction | 2022 |
| C Mannfolk Ab | Manufacturing | 2006 |
| C-Consults Ravals kommanditbolag | Professional & scientific | 1987 |
| CG Rent OY AB | Administrative & support | 2021 |
| Café-Restaurang Stenbrytaren, öppet bolag | Hospitality | 2004 |
| Dermoshop Oy | Wholesale & retail | 1977 |
| FR Maskinstation Ab | Transport & logistics | 2021 |
| Fastighetsaktiebolaget Korsnäs Business Center | Real estate | 1989 |
| Företagarhuset i Korsnäs Ab | Administrative & support | 1995 |
| Greenfarmer Ab Oy | Wholesale & retail | 2024 |
| In Pampas Ab | Wholesale & retail | 2006 |
| Inderfjärdens trädgård öppet bolag | Agriculture & fishing | 2009 |
| Korsnäs Auktioner Ab - Korsnäsin Huutokaupat Oy | Wholesale & retail | 2014 |
| Korsnäs Blomster- och Begravningstjänst Kommanditbolag | Other services | 1986 |
| Korsnäs Handelsträdgård Ab | Agriculture & fishing | 1989 |
| Korsnäs Tandklinik AB | Health & social care | 2024 |
| Last Man Oy | Construction | 2014 |
| M.Aspbäck Kb | Transport & logistics | 2010 |
| Mad Miners Ab | Construction | 2024 |
| Mannfolk & Nyståhl Ab | Agriculture & fishing | 1996 |
| Mannfolk Highland Ab | Agriculture & fishing | 2023 |
| Maritima Ab | Professional & scientific | 2020 |
| Matbiten Kb | Hospitality | 2016 |
| Mirzas Jobbservice Ab | Administrative & support | 2015 |
| Moiki Invest Ab | Real estate | 2016 |
| Mosho Oy | Wholesale & retail | 1991 |
| Nocash Oy | Hospitality | 2020 |
| Oy FS-Metall Ab | Manufacturing | 2007 |
| Oy K Hultholm Ab | Wholesale & retail | 1984 |
| Oy Korsnäs Grönsaker Ab | Wholesale & retail | 2025 |
| Oy Nytalo Ab | Wholesale & retail | 2021 |
| Oy P-Log Korsnäs Ab | Transport & logistics | 2002 |
| Oy Photo Lab Studios Ab | Professional & scientific | 2021 |
| Oy Profiweld Ab | Manufacturing | 2003 |
| Oy SpaDealers Ab | Wholesale & retail | 1981 |
| PNH Group Oy Ab | Financial services | 2025 |
| Pellfolks Transport Kb | Transport & logistics | 1983 |
| Prima solutions Oy | Agriculture & fishing | 2024 |
| Protein & Biceps Ab | Education | 2018 |
| Seapax Finland Ab Oy | Wholesale & retail | 2025 |
| Service Östling kommanditbolag | Wholesale & retail | 1981 |
| Stonebreaker Kb | Hospitality | 2009 |
| Tom's Rör Kb | Construction | 2005 |
| UM Transport Ab | Other services | 2006 |
| Vesterbacks Butik, K-E Vesterback & Co | Wholesale & retail | 1992 |
| Villek Ab | Professional & scientific | 1996 |
| Zenvotec Ab | Transport & logistics | 2023 |