| Vattenandelslaget Bredskär-Nätihamn-Fäboda | Water & waste | 1995 |
| Veljekset Mäkipelto Oy | Construction | 1985 |
| ViVaPro Oy | Construction | 2020 |
| ViaCall Finland Ab Oy | Administrative & support | 2005 |
| Viherterra Ab, Oy | Wholesale & retail | 1997 |
| Vikström Services Ab | Manufacturing | 2023 |
| Viola Hemservice Kotipalvelu Ab Oy | Health & social care | 2011 |
| Visible Realms Oy | Information & communication | 2017 |
| Visit Pietarsaari - Jakobstad Oy Ab | Administrative & support | 2023 |
| VisualsByConny Oy Ab | Professional & scientific | 2024 |
| VitaService Oy Ab | Wholesale & retail | 2002 |
| Vitruvius Arch Oy | Professional & scientific | 2007 |
| Vivos Fastigheter Ab | Real estate | 2017 |
| Vuokravekotin Oy | Wholesale & retail | 2020 |
| Västra Fäbodavikens vattenandelslag | Water & waste | 2006 |
| Warghäggblom AB | Real estate | 2020 |
| WBT Surveillance öppet bolag | Administrative & support | 2017 |
| WESO Oy | Manufacturing | 2023 |
| WK Fastigheter Ab | Real estate | 1983 |
| Walberg Entreprenad öppet bolag | Construction | 2011 |
| Walberg Media Oy | Professional & scientific | 2020 |
| Wargh & Granlund Ab | Real estate | 2019 |
| Weboksi Oy | Manufacturing | 2022 |
| Weepower öppet bolag | Construction | 2022 |
| Wesell Ab | Information & communication | 2022 |
| West Bay Entertainment, öppet bolag | Information & communication | 2004 |
| West Care Engineering Oy | Professional & scientific | 2019 |
| West Care Finland Oy | Construction | 2000 |
| WidNet öppet bolag | Information & communication | 2007 |
| Widetoes Oy Ab | Wholesale & retail | 2022 |
| Wikro Ab Oy | Manufacturing | 1968 |
| Wild Finnish Berries Oy | Wholesale & retail | 2026 |
| Willys Boats Ab | Manufacturing | 1996 |
| Wilma Interiör Ab Oy | Wholesale & retail | 2002 |
| Wonder in Energy Oy | Professional & scientific | 2025 |
| Woodhead Engineering Ab Oy | Manufacturing | 2024 |
| Xgrill Kb | Hospitality | 2025 |
| XtraKnäck öppet bolag | Construction | 2010 |
| Xtreme Performance Ab Oy | Wholesale & retail | 2021 |
| Yhtyneet Artistit Oy | Arts & recreation | 1993 |
| Yhtyneet Hitsaajat Oy | Manufacturing | 1974 |
| Yohto Ab Oy | Information & communication | 2020 |
| Yrityspalvelu Star Oy | Professional & scientific | 2019 |
| Yumraz Oy | Wholesale & retail | 2025 |
| ZAW Group Oy | Professional & scientific | 2023 |
| ZENSO Ab | Other services | 2020 |
| Zaigen Investment Oy | Financial services | 2020 |
| Zeill Oy Ab | Manufacturing | 2025 |
| Zfriends Ab | Hospitality | 2024 |
| Zump Finland Oy | Transport & logistics | 2020 |
| iGlobal Provider Solution Ab Oy | Other services | 2018 |
| jhrb-products ab oy | Wholesale & retail | 2020 |
| nTrade Oy Ltd | Wholesale & retail | 2015 |
| reviva oy ab | Other services | 2015 |
| Ådö vattenandelslag | Water & waste | 2024 |
| Ådön-Rajstall vattenandelslag | Water & waste | 2002 |
| Åkerlund Jonny Kb | Manufacturing | 1997 |
| Öppet bolag E & J Westerlund | Arts & recreation | 2001 |
| Övermark Holding Oy | Financial services | 2024 |