| Newres Oy | Financial services | 2021 |
| News First Finland Oy | Arts & recreation | 2011 |
| NewsBeez Oy | Information & communication | 2020 |
| Newsec Advisory Finland Oy | Real estate | 2009 |
| Newsec Property Asset Management Finland Oy | Real estate | 1988 |
| Newsme Corporation Oy Ltd | Information & communication | 2021 |
| Newstories Oy | Professional & scientific | 1988 |
| NexPath Oy | Information & communication | 2025 |
| NexTry Oy | Information & communication | 2023 |
| Nexcelsior Oy | Professional & scientific | 2020 |
| Nexe Solutions Oy | Administrative & support | 2012 |
| Nexec Oy | Professional & scientific | 2004 |
| Nexen Training Oy | Arts & recreation | 2025 |
| Nexeo Plastics Finland Oy | Wholesale & retail | 2011 |
| Nexer Asset Management Oy | Information & communication | 2006 |
| Nexetic Holdings Oy | Information & communication | 2024 |
| Nexfarma Oy | Wholesale & retail | 2014 |
| Nexfer Oy | Health & social care | 2021 |
| Nexhi Oy | Hospitality | 2025 |
| Nexia Oy | Professional & scientific | 1997 |
| Nexinvest Oy | Financial services | 2010 |
| Nexioris Oy | Information & communication | 2026 |
| Nexit Accelerators Oy | Financial services | 1999 |
| Nexit III GP Oy | Financial services | 2020 |
| Nexit III Ky | Financial services | 2021 |
| Nexit Ventures Oy | Professional & scientific | 1999 |
| Nexora Edge Oy | Education | 2026 |
| Nexstim Oyj | Professional & scientific | 2000 |
| Next Alpha Ventures Oy | Information & communication | 2007 |
| Next Biomed Therapies Oy | Manufacturing | 1999 |
| Next Generation Oy | Information & communication | 1994 |
| Next Legal Finland Oy | Professional & scientific | 2024 |
| Next Level Funding Oy | Financial services | 2018 |
| Next Level Management Oy | Administrative & support | 2020 |
| Next Level Motorsport Oy | Arts & recreation | 2022 |
| Next Page Ventures Oy | Professional & scientific | 2025 |
| Next Print Oy | Manufacturing | 1988 |
| Next Question Holding Oy | Professional & scientific | 2026 |
| Next Step Sports Oy | Education | 2025 |
| Next Time Design Oy | Information & communication | 2024 |
| Next Travel Oy | Administrative & support | 1990 |
| Next news media Oy | Information & communication | 2013 |
| Next-Era Oy | Professional & scientific | 2025 |
| NextBSS Oy | Information & communication | 2018 |
| NextGen Group Oy | Wholesale & retail | 2026 |
| NextLink Oy | Professional & scientific | 2022 |
| NextPhase Consulting Oy | Professional & scientific | 2025 |
| NextSalusoo Konsultointi OY | Professional & scientific | 2026 |
| NextStone Oy | Financial services | 2007 |
| Nextcon Finland Oy | Information & communication | 2004 |
| Nextdoor Host Oy | Hospitality | 2024 |
| Nextension Oy | Information & communication | 1997 |
| Nextform Ky | Professional & scientific | 2004 |
| Nextgen Invest Oy | Financial services | 2022 |
| Nextmet Oy | Other services | 1988 |
| Nextory Finland Oy | Information & communication | 2021 |
| Nextron AS, Suomen sivuliike | Wholesale & retail | 2017 |
| Nextura Oy | Professional & scientific | 2026 |
| Nextwawes fin oy | Administrative & support | 2024 |
| Nexus-IT Oy | Information & communication | 2008 |
| Nga Hirvonen oy | Wholesale & retail | 2017 |
| Ngo Trade Oy | Wholesale & retail | 2018 |
| Nguyen AT Oy | Administrative & support | 2017 |
| NiJi Sushi Oy | Hospitality | 2023 |
| NiWiDest Oy | Real estate | 1979 |
| Niam Core-Plus II Aviabulevardi I Oy | Real estate | 2017 |
| Niam Core-Plus II Aviabulevardi II Oy | Real estate | 2019 |
| Niam Core-Plus II Laajasalo Oy | Real estate | 2018 |
| Niam Core-Plus III Lyyra Lower Holding Oy | Real estate | 2023 |
| Niam Core-Plus III Lyyra Upper Holding Oy | Real estate | 2023 |
| Niam Core-Plus III Sampotalo Lower Holding Oy | Real estate | 2023 |
| Niam Core-Plus III Sampotalo Upper Holding Oy | Real estate | 2023 |
| Niam Core-Plus IV Asunnot Oy | Professional & scientific | 2026 |
| Niam Core-Plus IV Residential TopCo Oy | Professional & scientific | 2026 |
| Niam Oy | Financial services | 2007 |
| Niam VI Keilaniemi Oy | Real estate | 2016 |
| Niam VI Quartetto Estrade Lower Holding Oy | Real estate | 2015 |
| Niam VI Quartetto Estrade Upper Holding Oy | Real estate | 2015 |
| Niam VII Finland Logistics 1 Oy | Professional & scientific | 2021 |
| Niam VII Helsinki Residential Oy | Real estate | 2022 |
| Niam VII Kalasataman Horisontti Holding Oy | Real estate | 2022 |
| Niam VII Kalasataman Horisontti Upper Holding Oy | Real estate | 2022 |
| Niam VII Turku Residential Oy | Professional & scientific | 2022 |
| Niam VIII Tennispalatsi Holding Oy | Real estate | 2024 |
| Nian Trading Oy Ab | Financial services | 1992 |
| Nib Nab Oy | Administrative & support | 2023 |
| Nibelheim Holding Oy | Financial services | 2021 |
| Nibesko Oy | Financial services | 2026 |
| Nibras Holding Oy | Financial services | 2024 |
| NicTon Ab | Professional & scientific | 2024 |
| Nice & Wise Oy | Professional & scientific | 2020 |
| Nice Bike Oy | Wholesale & retail | 2015 |
| Nice Ice Oy | Arts & recreation | 2009 |
| Nice To Do Finland Oy | Wholesale & retail | 2014 |
| Nice Work International Oy | Professional & scientific | 2017 |
| Nice-Sec Oy | Other services | 2016 |
| Nice-business Consulting Oy | Administrative & support | 1999 |
| Niches & Potential Consulting Oy | Professional & scientific | 2015 |
| Nick Dorra Tuotanto Oy | Professional & scientific | 2006 |
| Nickab Oy | Professional & scientific | 2024 |