| Siegel Architecture AB CVR 5568153687 | BoardBoard of Directors | Since 2022 | — | Active |
| Siegel Real AB CVR 5569341349 | BoardBoard of Directors | Since 2022 | — | Active |
| Siegel Development 1 AB CVR 5569341372 | BoardBoard of Directors | Since 2022 | — | Active |
| Siegel Group AB CVR 5569883399 | BoardBoard of Directors | Since 2022 | — | Active |
| Siegel Ohboy AB CVR 5569916512 | BoardBoard of Directors | Since 2022 | — | Active |
| Cykelhotell Malmö AB CVR 5590804869 | BoardBoard of Directors | Since 2022 | — | Active |
| Siegel Development 2 AB CVR 5591175756 | BoardBoard of Directors | Since 2022 | — | Active |
| GBGBG AB CVR 5591474126 | BoardBoard of Directors | Since 2022 | — | Active |
| Inre Hamnen Holding Norrköping AB CVR 5591474167 | BoardBoard of Directors | Since 2022 | — | Active |
| Inre Hamnen Fastighet 2 Norrköping AB CVR 5591474175 | BoardBoard of Directors | Since 2022 | — | Active |
| Siegel Iggy AB CVR 5591474910 | BoardBoard of Directors | Since 2021 | — | Active |
| Siegel Höllviken AB CVR 5591901649 | BoardBoard of Directors | Since 2022 | — | Active |
| Siegel Skymningen 3 AB CVR 5592495468 | BoardBoard of Directors | Since 2022 | — | Active |
| Rader och Romber AB CVR 5593076945 | BoardBoard of Directors | Since 2022 | — | Active |
| Bostadsrättsföreningen Hackspett i Göteborg CVR 7696402812 | BoardBoard of Directors | Since 2022 | — | Active |