| Uudenmaan Remonttiässät Ky | | |
| UVL Järvenpää Oy | Construction | 2003 |
| UVL Talotekniikka Oy | Construction | 2018 |
| UX Vision Oy | Professional & scientific | 1997 |
| Uh-Rak Kommandiittiyhtiö | Construction | 2006 |
| Uimonen Productions Oy | Arts & recreation | 2026 |
| UkkoCo Oy | Construction | 2021 |
| Ulrikan Unelmat Oy | Administrative & support | 1997 |
| Umen Oy | Education | 2024 |
| Unicorn equestrian Finland | Agriculture & fishing | 2022 |
| Urakointi Paul Hintzell Oy | Construction | 1997 |
| Urban Nails & Beauty Oy | Other services | 2007 |
| Urvas Group Oy | Real estate | 2020 |
| Uudenmaan Carpojat Oy | Other services | 2005 |
| Uudenmaan Huoltopalvelu UHP Oy | Other services | 1985 |
| Uudenmaan INFRA Konsultit Oy | Professional & scientific | 2017 |
| Uudenmaan Kiinteistötekniikka Oy | Construction | 2025 |
| Uudenmaan Kylmähuolto Oy | Wholesale & retail | 2016 |
| Uudenmaan LVI - Mittaus Oy | Construction | 2023 |
| Uudenmaan LVI-Tiimi Oy | Construction | 1998 |
| Uudenmaan Laatumaalaus Oy | Construction | 2022 |
| Uudenmaan Lajittelukeskus Oy | Water & waste | 2001 |
| Uudenmaan Lämpöpumppu Oy | Construction | 1996 |
| Uudenmaan Pultti Oy | Wholesale & retail | 1992 |
| Uudenmaan Rakennusapu Oy | Construction | 2008 |
| Uudenmaan Tilat Oy | Real estate | 2017 |
| Uudenmaan Vammaispalvelut Oy | Health & social care | 2002 |
| Uudenmaan asuntojalostus Oy | Construction | 2017 |
| Uudenmaan kaivuu ja kuljetus Oy | Construction | 2023 |
| Uudenmaan konepalvelu Oy | Wholesale & retail | 2009 |
| Uudenmaan saneerauspalvelu Oy | Construction | 2008 |
| Uusinta Kustannusosakeyhtiö | Information & communication | 2000 |
| Uusiofuusio Oy | Wholesale & retail | 2014 |
| Uvicom Rakennus Oy | Construction | 2019 |
| V. Pulkkinen Oy | Construction | 1990 |
| V.J Holdings Oy | Construction | 2023 |
| VA Invest Oy | Construction | 2012 |
| VA-Development Oy | Financial services | 2008 |
| VA-Systems Oy | Financial services | 1983 |
| VAS Rakennus Oy | Construction | 2023 |
| VF-Yhtiöt Oy | Transport & logistics | 1996 |
| VHIG Oy | Construction | 2008 |
| VIP Mainos Oy | Professional & scientific | 2005 |
| VKG Prime Oy | Financial services | 2015 |
| VM Autostyling Oy | Other services | 2023 |
| VMP-Sales Oy | Wholesale & retail | 1992 |
| VO Partners Oy | Professional & scientific | 2019 |
| VT Fellows Oy | Professional & scientific | 2025 |
| VV-Kuljetus Oy | Transport & logistics | 1992 |
| Vaarna Group Oy | Financial services | 2026 |
| Vaatelainaamo Vaatepuu Oy | Administrative & support | 2017 |
| Vakuuttavin TK Oy | Financial services | 2022 |
| Vakuutus JF Oy | Financial services | 2024 |
| Valariutta Healthcare Consulting Oy | Financial services | 2022 |
| Valkea Visuals Oy | Professional & scientific | 2024 |
| Valkoinen Pingviini Oy | Wholesale & retail | 1995 |
| Valmennus-Siat Oy | Professional & scientific | 2019 |
| Valmennuskeskus Vuori Oy | Education | 2023 |
| Valo Fysio & Coaching Oy | Education | 2021 |
| ValoaNäkyvissä Oy | Health & social care | 2015 |
| Valoracare oy | Health & social care | 2025 |
| Valta Software Oy | Information & communication | 2024 |
| Vantaan Kultakaari Oy | Wholesale & retail | 1981 |
| Vartalon Hymy Oy | Health & social care | 2017 |
| Vauhtimato Oy | Real estate | 1994 |
| Vaurio Car Oy | Other services | 2023 |
| Vehkatupa Oy | Health & social care | 2010 |
| Velim Oy | Construction | 1991 |
| Veloxia Oy | Wholesale & retail | 1993 |
| Ven & Van Oy | Health & social care | 2026 |
| Venni Lindroth Oy | Professional & scientific | 2026 |
| Ventured Oy | Professional & scientific | 2015 |
| Verhoomo Elomäki Ky | Manufacturing | 1996 |
| Veridient Oy | Professional & scientific | 2025 |
| Verkkokasvu Oy | Information & communication | 2026 |
| Vermiselli Oy Helsinki | Financial services | 2011 |
| VeroSara Ky | Professional & scientific | 2016 |
| Verstas 5 oy | Construction | 2019 |
| Verstas247 - CraftGym Oy | Other services | 2018 |
| Vesi-Pauli Oy | Professional & scientific | 1987 |
| Vesteriset E & R Avoin yhtiö | Wholesale & retail | 1998 |
| Vetovoimainen mieli Oy | Education | 2023 |
| ViSa Rakennus ja Sijoitus Oy | Real estate | 2021 |
| Viaber Oy | Wholesale & retail | 2001 |
| Viherisännöinti Oy | Administrative & support | 2023 |
| Viherrakennusliike Ikivihreä Ky | Administrative & support | 1990 |
| Vihreäkatu Oy | Wholesale & retail | 2021 |
| Viihdelehdet Martti Häkkinen Oy | Wholesale & retail | 1978 |
| Viimapää Oy | Professional & scientific | 2014 |
| Viisi Kettua OY | Wholesale & retail | 2021 |
| Villa Valeria Oy | Health & social care | 2025 |
| Villa Viinikkala Oy | Professional & scientific | 2010 |
| Vilsu Oy | Professional & scientific | 2021 |
| Vimartek Oy | Manufacturing | 2012 |
| Vintageplanes Oy | Transport & logistics | 2021 |
| Vinter Oy | Construction | 2014 |
| Virtasen Rakennuspalvelu Oy | Construction | 2026 |
| Visio Work Days Oy | Professional & scientific | 2022 |
| Visions Reincarnated Oy | Information & communication | 2020 |
| Visuamista oy | Professional & scientific | 2023 |