| Nyland & co AB | Kvissleby | 0 tkr |
| Nylands Städ Holding AB | Kramfors | 0 tkr |
| Nylunds Lås & Larm AB | Härnösand | 0 tkr |
| Nypro Aktiebolag | Kvissleby | 0 tkr |
| Nyströms i Solberg AB | Solberg | 0 tkr |
| Nyström Skog och Energi AB | Sundsvall | 0 tkr |
| Oakgrove Management AB | Sundsvall | 0 tkr |
| Öbacka Holding AB | Härnösand | 0 tkr |
| ÖBM Holding AB | Själevad | 0 tkr |
| Oct First Invest AB | Sundsvall | 0 tkr |
| ÖD 10:155 AB | Jordbro | 0 tkr |
| Öde Förvaltnings AB | Söråker | 0 tkr |
| Oden Parkering AB | Sundsvall | 0 tkr |
| Odigia ledarskap och organisationsutveckling AB | Sundsvall | 0 tkr |
| Ögonvrån Optik - Guld Aktiebolag | Örnsköldsvik | 0 tkr |
| Öhlingsholm Aktiebolag | Erikslund | 0 tkr |
| Öhlingsholm Fastighets AB | Erikslund | 0 tkr |
| Ojalas Skogsarbeten Aktiebolag | Ånge | 0 tkr |
| OJAL Investments AB | Örnsköldsvik | 0 tkr |
| Öjxäv SCL AB | Sundsvall | 0 tkr |
| ÖKA Holding AB | Domsjö | 0 tkr |
| Ökulla Invest AB | Sollefteå | 0 tkr |
| Ola Andersson Holding AB | Alnö | 0 tkr |
| Oldco 1806 AB | Sundsvall | 0 tkr |
| Oldco Holding 12 - 2018 AB | Sundsvall | 0 tkr |
| Oldco Holding 12 - 2019 AB | Sundsvall | 0 tkr |
| Oldco Holding 12 -2020 AB | Sundsvall | 0 tkr |
| Oldco Holding 12 - 2021 AB | Sundsvall | 0 tkr |
| Oldco Holding 12 - 2022 AB | Sundsvall | 0 tkr |
| Oldco Holding 12 - 2023 AB | Sundsvall | 0 tkr |
| Oldco Holding 12 - 2024 AB | Sundsvall | 0 tkr |
| Oldco Holding 12 - 2025 AB | Sundsvall | 0 tkr |
| Oldco Holding 12 - 2026 AB | Sundsvall | 0 tkr |
| Oldco Holding 6 18-19 AB | Sundsvall | 0 tkr |
| Oldco Holding 6 19-20 AB | Sundsvall | 0 tkr |
| Oldco Holding 6 20-21 AB | Sundsvall | 0 tkr |
| Oldco Holding 6 21-22 AB | Sundsvall | 0 tkr |
| Oldco Holding 6 22-23 AB | Sundsvall | 0 tkr |
| Oldco Holding 6 23-24 AB | Sundsvall | 0 tkr |
| Oldco Holding 6 24-25 AB | Sundsvall | 0 tkr |
| Oldco Holding 6 25-26 AB | Sundsvall | 0 tkr |
| Oldco Holding 6 26-27 AB | Sundsvall | 0 tkr |
| Oldco Holding 8 17-18 AB | Sundsvall | 0 tkr |
| Oldco Holding 8 18-19 AB | Sundsvall | 0 tkr |
| Oldco Holding 8 20-21 AB | Sundsvall | 0 tkr |
| Oldco Holding 8 AB | Sundsvall | 0 tkr |
| Oldco Holding AB | Sundsvall | 0 tkr |
| Oliby Aktiebolag | Själevad | 0 tkr |
| Oliver Nilsson AB | Sundsvall | 0 tkr |
| Olja & Sanitet i Sollefteå Holding AB | Sollefteå | 0 tkr |