| Christian Forsman & Co Aktiebolag CVR 5562558923 | BoardBoard of Directors | Since 2022 | — | Active |
| RELS Fastigheter AB CVR 5567099543 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| Centrofastigheter i Nynäshamn AB CVR 5567195713 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| Alkärrsplans Utvecklings AB CVR 5567652184 | BoardBoard of Directors | Since 2025 | — | Active |
| Nynäshamn P 13 AB CVR 5567903165 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| Nynäshamn P 13 AB CVR 5568338809 | BoardBoard of Directors | Since 2022 | — | Active |
| Forsmans Gårdafastighet AB CVR 5568629058 | BoardBoard of Directors | Since 2022 | — | Active |
| TBS Holding AB CVR 5569081390 | BoardBoard of Directors | Since 2022 | — | Active |
| DuoFors AB CVR 5590009774 | BoardBoard of Directors | Since 2022 | — | Active |
| Nynäshamns Centrum Förvaltning AB CVR 5592310154 | BoardBoard of Directors | Since 2020 | — | Active |
| Stationshuset i Nynäshamn AB CVR 5592526239 | BoardBoard of Directors | Since 2022 | — | Active |
| Alkärrsplans Intressenter AB CVR 5593471385 | BoardBoard of Directors | Since 2022 | — | Active |
| Alkärrsplans Utveckling Holding AB CVR 5593825267 | BoardBoard of Directors | Since 2025 | — | Active |
| Alkärrsplans Projekt AB CVR 5593826893 | BoardBoard of Directors | Since 2025 | — | Active |
| Knutpunktshuset AB CVR 5594091364 | BoardBoard of Directors | Since 2023 | — | Dissolved |