| Ägir Invest Aktiebolag CVR 5560564444 | BoardBoard of Directors | Since 2020 | — | Active |
| Aktiebolag Grännastrandens Camping CVR 5562180272 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| Svarta Båden Fastigheter AB CVR 5563292431 | BoardBoard of Directors | Since 2020 | — | Active |
| Dunross & Co Aktiebolag CVR 5563310209 | BoardBoard of Directors | Since 2020 | — | Active |
| Holtermansgatans Fastighets AB CVR 5565398632 | BoardBoard of Directors | Since 2020 | — | Active |
| Cellectricon AB CVR 5566020896 | BoardBoard of Directors | Since 2022 | — | Active |
| Johanneberg Campusbo AB CVR 5566586730 | BoardBoard of Directors | Since 2024 | — | Active |
| WALLBLOMGRUPPEN AB CVR 5567153282 | BoardBoard of Directors | Since 2022 | — | Active |
| Aktivitetscentrum Udden Orsa AB CVR 5567255756 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| Leif Nilsson i Göteborg AB CVR 5568347040 | BoardBoard of Directors | Since 2022 | — | Active |
| K21 Entreprenad AB CVR 5568897101 | BoardBoard of Directors | Since 2024 | — | Active |
| K21 Service AB CVR 5568933633 | BoardBoard of Directors | Since 2024 | — | Active |
| Nålskäran Fastighets AB CVR 5569734329 | BoardBoard of Directors | Since 2020 | — | Active |
| Uddjaur Fastighets AB CVR 5591053482 | BoardBoard of Directors | Since 2020 | — | Active |
| Landalagatan Fastighets AB CVR 5591179378 | BoardBoard of Directors | Since 2020 | — | Active |
| K21 Entreprenad Bohuslän AB CVR 5591222459 | BoardBoard of Directors | Since 2024 | — | Active |
| Lilly & gänget AB CVR 5591525646 | BoardDeputy Board Member | Since 2022 | — | Active |
| Alientum Kapital AB CVR 5591527782 | BoardDeputy Board Member | Since 2022 | — | Active |
| Nya Ostindiska Kapital AB CVR 5591538532 | BoardDeputy Board Member | Since 2021 | — | Active |
| K21 Entreprenad ROT AB CVR 5591833149 | BoardBoard of Directors | Since 2024 | — | Active |
| Gåsen Fastighets AB CVR 5595503425 | BoardBoard of Directors | Since 2025 | — | Active |
| K 21 Entreprenad Väst AB CVR 5595687061 | BoardBoard of Directors | Since 2026 | — | Active |