| Tornion Palveluasunnot Oy | Health & social care | 2006 |
| Tornion Panimo Oy | Manufacturing | 1994 |
| Tornion Pool Oy | Construction | 1992 |
| Tornion Puhdistuspalvelu Oy | Administrative & support | 1992 |
| Tornion Puupaja Ky | Construction | 1986 |
| Tornion Rabatti Oy | Financial services | 1993 |
| Tornion Rajaportti Oy | Wholesale & retail | 2010 |
| Tornion Rakennussaneeraus Ky | Construction | 1989 |
| Tornion Rakennussora Oy | Construction | 1987 |
| Tornion Rakennusurakointi Oy | Construction | 2024 |
| Tornion Revontuli avoin yhtiö | Hospitality | 2019 |
| Tornion Sisustajat Oy | Agriculture & fishing | 1989 |
| Tornion Sähkö-Service Oy | Construction | 2015 |
| Tornion Sähköapu Oy | Construction | 1990 |
| Tornion Sähköpojat Oy | Manufacturing | 1974 |
| Tornion Taksi Oy | Transport & logistics | 1995 |
| Tornion Taloustarvike Kulju & Kumpp. | Wholesale & retail | 1978 |
| Tornion Tennishalli Oy | Arts & recreation | 2017 |
| Tornion Teollisuuspalvelu Oy | Manufacturing | 2021 |
| Tornion Terapia Oy | Health & social care | 2020 |
| Tornion Tilipalvelu Oy | Professional & scientific | 1984 |
| Tornion Tyylikaluste Ky | Construction | 1994 |
| Tornion Vesi Oy | Water & waste | 2004 |
| Tornion Viirak-Rakennus Oy | Construction | 2021 |
| Tornion katsastus Oy | Professional & scientific | 1998 |
| Tornion sähkötuvat Oy | Financial services | 1998 |
| Tornion varastot Oy | Real estate | 2012 |
| Tornion vuokra-asunnot Oy | Real estate | 1989 |
| Tornionlaakson Taimitarha, avoin yhtiö | Agriculture & fishing | 1991 |
| Torpin Duo Oy | Real estate | 2025 |
| Torpin Tusina Oy | Financial services | 1990 |
| Torppihallit Oy | Real estate | 2025 |
| Tositori Ky | Wholesale & retail | 2014 |
| Tovila Oy | Real estate | 2002 |
| Trading House Taida Oy | Professional & scientific | 2023 |
| Traktorityöt J. Huhtanen Oy | Construction | 2006 |
| Treeless Invest oy | Real estate | 2026 |
| Trestam Oy | Real estate | 1994 |
| Tsv-Rakennuttajat Oy | Construction | 2020 |
| Tsv-Steel Oy | Manufacturing | 2021 |
| Tuurasoft Oy | Information & communication | 2016 |
| Työkunto Suomi Oy | Professional & scientific | 2026 |
| Unia Visions Oy | Health & social care | 2021 |
| Urakointi Uusitalo Oy | Construction | 2023 |
| Utopia Pizzeria Oy | Hospitality | 2010 |
| Uusitalo Service Oy | Construction | 2024 |
| Uusitalon Kuljetus Oy | Transport & logistics | 1987 |
| VAU-Rakennus Oy | Construction | 2019 |
| VJ-Yhtiöt Oy | Real estate | 2015 |
| VJP Transport Oy | Other services | 2006 |
| VMJ Service Ky | Professional & scientific | 2014 |
| VMK-Lappi Oy | Professional & scientific | 2020 |
| VSJ Service Oy | Other services | 2026 |
| Vaarala Holding Oy | Financial services | 2025 |
| Vaaran Taksi Ky | Transport & logistics | 2007 |
| Valho Oy | Hospitality | 2015 |
| Valinta Pikku & Tukku Ky | | 1988 |
| Valuuttavelhot Oy | Financial services | 2021 |
| Vara-Ville Oy | Construction | 2012 |
| Vareservice Oy | Construction | 2021 |
| VeerMax Oy | Financial services | 2026 |
| Veeti Jaako Oy | Financial services | 2021 |
| Veijo Isometsä Oy | Professional & scientific | 2020 |
| Veirok Oy | Construction | 2021 |
| Veljekset Kunnari Ky | Transport & logistics | 1993 |
| Veljekset Pannimaa | Construction | 2005 |
| Viippola Group Oy | Administrative & support | 2019 |
| Villakorpi Oy | Construction | 2011 |
| Ville-Veli Oy | Professional & scientific | 2023 |
| Vilsme-Palvelut Oy | Manufacturing | 2021 |
| Vipite Capital Oy | Professional & scientific | 2018 |
| Viplux Oy | Wholesale & retail | 2005 |
| Virvatuli Oy | Financial services | 1977 |
| Virvatuli-Valaisimet Oy | Wholesale & retail | 1994 |
| Voiters Oy | Real estate | 1992 |
| Voltguy Oy Ab | Construction | 2021 |
| VäKi Kiinteistöt Oy | Real estate | 2025 |
| Väriraitti Oy | Wholesale & retail | 2008 |
| Väylän Mettäpalvelu Oy | Agriculture & fishing | 2020 |
| Väylän Vakuutus Oy | Financial services | 2009 |
| Wanha-Pirkkiön Ratsutalli Oy | Education | 2026 |
| Weir Minerals Finland Oy | Wholesale & retail | 1990 |
| West Border Ky Myllylahti | Professional & scientific | 1982 |
| Wild and Free Oy | Wholesale & retail | 1968 |
| Wirkkala Optiikka Oy | Wholesale & retail | 2023 |
| Woodmark Oy | Professional & scientific | 1991 |
| X Venture Oy | Manufacturing | 2026 |
| X-Treme Hunter Oy | Wholesale & retail | 2014 |
| X-off Ky | Construction | 2007 |
| Xerotec Oy | Manufacturing | 1996 |
| Ylirakennus OY | Construction | 2025 |
| Ylläksen Isännöinti Ky | Real estate | 2020 |
| Ylläsloma Oy | Hospitality | 2006 |
| Yöväenliike Oy Ab | Hospitality | 2013 |
| Zoomia Oy | Real estate | 1993 |
| akliiN Oy | Professional & scientific | 2024 |
| heavypro oy | Mining & quarrying | 2021 |
| iLme innorooms Oy | Professional & scientific | 1998 |
| nopea pizza kebab oy | Hospitality | 2020 |