| Stenfast i Stenungsund AB CVR 5560739202 | BoardBoard of Directors | Since 2022 | — | Active |
| VÄSTKUSTDOLOMITEN Aktiebolag CVR 5562305564 | BoardBoard of Directors | Since 2022 | — | Active |
| Stenfast i Stenungsund Aktiebolag CVR 5564269669 | BoardBoard of Directors | Since 2023 | — | Dissolved |
| Fastigheten Lilla Stranden AB CVR 5564505310 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| OB Förvaltnings AB CVR 5566288469 | BoardDeputy Board Member | Since 2022 | — | Active |
| Martin Gösfeldt-Bilar i Stenungsund Aktiebolag CVR 5566577333 | BoardBoard of Directors | Since 2022 | — | Active |
| Objektbyggen Väst AB CVR 5566601000 | BoardDeputy Board Member | Since 2019 | — | Dissolved |
| Martin Gösfeldt Fastighets AB CVR 5566788237 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| Stenfast Holding i Stenungsund AB CVR 5568470073 | BoardBoard of Directors | Since 2022 | — | Active |
| Stenälv Fastighets AB CVR 5569108029 | BoardDeputy Board Member | Since 2019 | — | Dissolved |
| Enestigens Fastighetsskötsel AB CVR 5591751044 | BoardDeputy Board Member | Since 2022 | — | Active |
| Stenfast Bygg-och Fastighetsskötsel AB CVR 5593858334 | BoardBoard of Directors | Since 2022 | — | Active |
| SEOO Bemanning AB CVR 5593893448 | BoardBoard of Directors | Since 2023 | — | Active |
| Stenfast Förvaltning AB CVR 5594649088 | BoardBoard of Directors | Since 2024 | — | Active |
| Fastigheten Stenfast lilla strandvägen Stenung 16:5 AB CVR 5594649096 | BoardBoard of Directors | Since 2023 | — | Active |