| Oy City Capital Ab | Financial services | 1989 |
| Oy Concretecrofters Ab | Mining & quarrying | 2020 |
| Oy Deutec Ab | Wholesale & retail | 1990 |
| Oy Domestos Ab | Real estate | 1988 |
| Oy Drägsby Vattenkraft - Treksilän Vesivoima Ab | Energy | 2000 |
| Oy E.R. Wegelius Ab | Professional & scientific | 1989 |
| Oy EUROCARRIER 2000 Ltd | Transport & logistics | 2024 |
| Oy EUROCARRIER Ltd | Transport & logistics | 2021 |
| Oy EUROGAS Ltd | Energy | 2022 |
| Oy EUROTRAIN Ltd | Transport & logistics | 2026 |
| Oy Ednas Print Ltd | Wholesale & retail | 2007 |
| Oy Einar Kaivin ja Kuljetus Ab | Construction | 1993 |
| Oy Elmersro Ab | Hospitality | 2019 |
| Oy EuroBridge Ltd | Transport & logistics | 2026 |
| Oy Evidentum Ab | Professional & scientific | 1994 |
| Oy FENNOGAS Ltd | Wholesale & retail | 2020 |
| Oy FENNOMARE Ltd | Transport & logistics | 2019 |
| Oy Ferrytek Ab | Construction | 1997 |
| Oy Finfal Ltd | Real estate | 2017 |
| Oy Fishpoint Finland Ab | Wholesale & retail | 2013 |
| Oy Flash Ab | Professional & scientific | 1973 |
| Oy Fredlund Floors Ab | Construction | 1994 |
| Oy FriendShip Cruises Ab | Transport & logistics | 2016 |
| Oy Glasstrong Ab | Real estate | 1999 |
| Oy Glen Dimplex Nordic Ab | Wholesale & retail | 1993 |
| Oy Green Machine Infra Ab | Construction | 2009 |
| Oy Habitex Ab | Wholesale & retail | 2004 |
| Oy Hakex Ab | Professional & scientific | 1990 |
| Oy Helifoto Ab | Professional & scientific | 1985 |
| Oy Hellberg Capital Ab | Financial services | 2014 |
| Oy Hellberg Trading & Co Ab | Wholesale & retail | 2006 |
| Oy Hetecon Ab | Construction | 1987 |
| Oy Hilario | Health & social care | 2009 |
| Oy Innobor Ltd | Construction | 2000 |
| Oy Insinööritoimisto Duopoint Ingenjörsbyrå Ab | Professional & scientific | 2023 |
| Oy Instant-Team Ab | Construction | 1997 |
| Oy Jelca-lift Ab | Administrative & support | 2011 |
| Oy Jensen Invest Ab | Construction | 2022 |
| Oy Jimmy Suuronen Ab | Transport & logistics | 2021 |
| Oy Kaj Forsblom Ab | Transport & logistics | 1990 |
| Oy Kaj Rask Ab | Construction | 1998 |
| Oy Kaj Rosenström Ab | Construction | 1988 |
| Oy Kascal Ab | Professional & scientific | 1992 |
| Oy Kivaline Ab | Construction | 1994 |
| Oy Kokon-Sport Ab | Arts & recreation | 1999 |
| Oy Kokonhalli Ab | Real estate | 1982 |
| Oy Konseptiplus Ltd | Professional & scientific | 1998 |
| Oy L-J Nyholm Ab | Real estate | 1993 |
| Oy LVIS-K.A.Stendahl-VVSEL Ab | Construction | 2004 |
| Oy LadyL Ab | Other services | 2020 |
| Oy Lavs Ab | Real estate | 1989 |
| Oy Lindvest Ab | Professional & scientific | 1995 |
| Oy Line-Ma Ab | Wholesale & retail | 1962 |
| Oy Louer | Construction | 2021 |
| Oy Lumilandia Ab | Construction | 2006 |
| Oy MakuSmak Ab | Hospitality | 2022 |
| Oy Maritop Ab | Professional & scientific | 2002 |
| Oy Medilääkintä Ab | Health & social care | 1989 |
| Oy Micservice Ab | Construction | 1998 |
| Oy My Holding & Assets Ab | Financial services | 1990 |
| Oy Myrd Invest LTD | Construction | 1992 |
| Oy Niem Ab | Real estate | 2014 |
| Oy Nikotron Ab | Manufacturing | 1989 |
| Oy Nim-med Ab | Health & social care | 2019 |
| Oy Nineteenth Hole Ltd | Real estate | 1987 |
| Oy Ole V. Andersson Ab | Professional & scientific | 1997 |
| Oy Ole-Service Ab | Professional & scientific | 1971 |
| Oy Orxter Ltd | Professional & scientific | 2008 |
| Oy PSB Borgå Ab | Construction | 2022 |
| Oy Pace 1 Tools Ltd | Manufacturing | 2007 |
| Oy Painotalo tt-urex Ab | Manufacturing | 2006 |
| Oy Pellinge Notariat och Bokföring Ab | Professional & scientific | 2001 |
| Oy PhysioKit Ab | Health & social care | 2011 |
| Oy Pop it up Retail Ab | Professional & scientific | 2016 |
| Oy Porvoon Autotarvike Ab | Other services | 1953 |
| Oy Porvoon Huolto Seppo-Borgå Service Seppo Ab. | Other services | 1992 |
| Oy Porvoon Keskusgolf Ab | Arts & recreation | 2001 |
| Oy Porvoon Kiinteistöpörssi - Borgå Fastighetsbörs Ab | Real estate | 2004 |
| Oy Porvoon Löytöpiste Ab | Wholesale & retail | 1994 |
| Oy ProPersonDNA Ab | Education | 1999 |
| Oy Remil Ab | Professional & scientific | 2015 |
| Oy Rukafun Ab | Real estate | 2004 |
| Oy Råkulla Stables Ab | Arts & recreation | 1983 |
| Oy Rönnäs Vatten och Avfall Ab | Water & waste | 2002 |
| Oy S.O. Olenius Ab | Wholesale & retail | 1971 |
| Oy SCANBULK Ltd | Transport & logistics | 2019 |
| Oy SCANENERGY Ltd | Wholesale & retail | 2021 |
| Oy SCANFERRY Ltd | Transport & logistics | 2024 |
| Oy SCANHOLDING Ltd | Transport & logistics | 2020 |
| Oy SCANSTEVE Ltd | Transport & logistics | 2024 |
| Oy Safari-Valmir | Administrative & support | 2024 |
| Oy Samaria Ab Hoitotyö - Vårdarbete | Health & social care | 1999 |
| Oy Selmok Ab | Construction | 1992 |
| Oy Sevelyn Ab | Wholesale & retail | 2010 |
| Oy Sijoitus Revontuli Ab | Real estate | 1988 |
| Oy Sipoon Puutarhapuoti - Sibbo Trädgårdsboden Ab | Wholesale & retail | 1992 |
| Oy Skandinavia Offset Ab | Manufacturing | 1979 |
| Oy Soundstation Finland Ltd | Information & communication | 1996 |
| Oy Stefan Forsberg Ab | Transport & logistics | 2013 |
| Oy Stenström Engineering Ab | Professional & scientific | 2019 |