| A & B Forsberg Öppet bolag | Transport & logistics | 1988 |
| Ab Byggservice KJB Rakennuspalvelu Oy | Construction | 1991 |
| Ab Ekonomihuset Know How | Professional & scientific | 2023 |
| Ab Happy Holding Oy | Professional & scientific | 2022 |
| Ab Jarla-Products Oy | Manufacturing | 2005 |
| Ab Lindberg Construction Oy | Construction | 2015 |
| Ab Malax Begravningsbyrå - Maalahden Hautaustoimisto Oy | Wholesale & retail | 1991 |
| Ab Malmhagen Oy | Real estate | 1993 |
| Ab Mitts & Co Oy | Construction | 1976 |
| Ab Neuropsykolog - Neuropsykologi K. Helenelund Oy | Real estate | 2008 |
| Ab Nimetech Oy | Manufacturing | 1994 |
| Ab SL-Forest Oy | Agriculture & fishing | 2009 |
| Ab Servicestation Sandholm & Lönnvik Oy | Wholesale & retail | 1984 |
| Abxwind Holdings Ab | Construction | 2021 |
| Antells Bär & Trädgård Ab | Agriculture & fishing | 1995 |
| BTBK Service Ab | Hospitality | 2022 |
| Berndts Bildelar Ab Oy | Wholesale & retail | 2000 |
| Boda Fisk och Frakt Öppet bolag | Agriculture & fishing | 2004 |
| Boda Ris Ab | Agriculture & fishing | 2008 |
| Bokmal Ab | Professional & scientific | 2021 |
| Byggnadsvård Perinnerakennus Peltoniemi Oy | Construction | 2024 |
| Chicagowood Ab Ltd | Manufacturing | 2025 |
| Curenta öppet bolag | Health & social care | 2009 |
| ElectroCool OyAb | Other services | 2013 |
| Existens anl | Manufacturing | 2016 |
| Fastighets Ab Lyran | Real estate | 2025 |
| Fastighets Ab Malax Bostäder | Real estate | 1971 |
| Fastighets Ab Rydberg | Real estate | 2015 |
| G. Vahlgren Kb | Agriculture & fishing | 1985 |
| GE Botnia Ab Oy | Water & waste | 1981 |
| Herpman Metall Ab Oy | Manufacturing | 2007 |
| Herrgårds köttrökeri Ab | Manufacturing | 2014 |
| Håkans Produktutveckling Kb | Wholesale & retail | 1998 |
| IN Production Oy Ab | Manufacturing | 2025 |
| Isac Gröndahl Ab Oy | Health & social care | 2023 |
| JCA Consulting Ab Oy | Real estate | 2020 |
| Jan-Erik Skinnar & Co Kommanditbolag | Construction | 1977 |
| K.J. Lindeqvist Elinstallation Kb | Construction | 1992 |
| KK Skogsbruk Ab | Agriculture & fishing | 1998 |
| KP Hyresbostäder Ab | Real estate | 2021 |
| KRK infrasystems Ab Oy | Agriculture & fishing | 2012 |
| Kansa Wellness Ab Oy | Health & social care | 2025 |
| Kb Sanifast Ky | Construction | 2006 |
| Kentas Konsultering Ab | Agriculture & fishing | 1976 |
| Kiinteistö Oy Karijoen Kartano | Real estate | 2006 |
| Konstverkstaden Malakta Ab | Real estate | 2007 |
| Kroppsverkstaden Öppet bolag | Arts & recreation | 2016 |
| Köttdisken Malax Ab | Wholesale & retail | 2014 |
| LK-West Invest Ab | Financial services | 2015 |
| LW Skog Ab Oy | Agriculture & fishing | 2021 |
| Lapin Tuulimylly Oy | Real estate | 2013 |
| Lasses Bokföring Ab | Professional & scientific | 1987 |
| MBS Holding Ab Oy | Financial services | 2020 |
| Maalahden Liha Ky | Manufacturing | 1995 |
| Malakta Films ltd Ab Oy | Information & communication | 2015 |
| Malax Bageri & Conditori Ab | Manufacturing | 1996 |
| Malax Blomstercenter Ab | Wholesale & retail | 2025 |
| Malax Byggmaskiner Ab | Construction | 1990 |
| Malax Energi Ab | Energy | 1990 |
| Malax Fastigheter Ab | Real estate | 1989 |
| Malax Ishall Ab - Maalahden Jäähalli Oy | Arts & recreation | 2013 |
| Malax Jobbtjänst Ab | Construction | 2012 |
| Malax Master building solutions Ab | Construction | 2016 |
| Malax Plåt öppet bolag | Construction | 2015 |
| Malax Trädgård Ab Oy | Agriculture & fishing | 2016 |
| Malax Värmeservice Ab Oy | Agriculture & fishing | 2009 |
| Malax välfärdsfastigheter Ab | Real estate | 2025 |
| Malax-Korsnäs hälsovårdsfastigheter Ab | Real estate | 2025 |
| Mamalia Andelslag | Health & social care | 2015 |
| MarineDock Ab | Manufacturing | 2020 |
| Minettes Kök - Keittiö Ab Oy | Hospitality | 2020 |
| Norrvägens Fastighetspark Ab Oy | Real estate | 2021 |
| Notos Solutions Oy Ab | Professional & scientific | 2010 |
| Oy Ab Cari'ra Cade Ltd | Wholesale & retail | 1995 |
| Oy Botnia Marin Ab | Manufacturing | 1976 |
| Oy J-E Lindell Ab | Manufacturing | 1981 |
| Oy Lurv Ab | Other services | 2019 |
| Oy Nyfors Invest Ab | Financial services | 2009 |
| Oy Thai Style Ab | Hospitality | 2014 |
| Oy Valcyre Ab | Financial services | 2019 |
| PAV Oy Ab | Construction | 1990 |
| PB Import Kb | Wholesale & retail | 2022 |
| Pappadagis Ab | Wholesale & retail | 2010 |
| Pinola Esa Ab Oy | Hospitality | 2016 |
| Pohjanmaan Karjutarvikkeet Oy / Österbottens Galttillbehör Ab | Wholesale & retail | 2002 |
| ProForit Ab Oy | Agriculture & fishing | 2019 |
| Procons Oy Ab | Manufacturing | 2012 |
| Riab Finland OY | Professional & scientific | 2010 |
| RJI Holding Oy | Wholesale & retail | 2012 |
| RJS-Bygg öppet bolag | Construction | 2017 |
| Reidi Oy | Information & communication | 2018 |
| S&T Östman | Construction | 1991 |
| Siivouspalvelu-Städtjänst Korhonen & Mäkinen, öppet bolag | Administrative & support | 1989 |
| Storfors Svin Ab | Agriculture & fishing | 1996 |
| Streemhill Furs Ab | Agriculture & fishing | 1976 |
| Söderholm & Co Ab | Transport & logistics | 1995 |
| T Majors Entreprenad Ab Oy | Construction | 2014 |
| TA Elektriska Kb | Construction | 2013 |
| Tandklinik Lewis KB | Health & social care | 1992 |
| Team Storfors Invest Ab | Financial services | 2026 |