| Förvaltningsaktiebolaget Castor CVR 5560442013 | BoardBoard of Directors | Since 2022 | — | Active |
| Castor Plus AB CVR 5562990902 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 110 AB CVR 5563818169 | BoardBoard of Directors | Since 2022 | — | Active |
| Teknisk Fastighetsservice i Norrland Aktiebolag CVR 5564733102 | BoardBoard of Directors | Since 2020 | — | Active |
| Styrteknik i Norr AB CVR 5564860962 | BoardBoard of Directors | Since 2022 | — | Active |
| Falu Ventilation AB CVR 5565201646 | BoardBoard of Directors | Since 2022 | — | Dissolved |
| Invent i Falun AB CVR 5565276572 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 101 AB CVR 5565389516 | BoardBoard of Directors | Since 2020 | — | Active |
| Hedern Fastigheter 401 AB CVR 5565434577 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 103 AB CVR 5565500211 | BoardBoard of Directors | Since 2022 | — | Active |
| Bohlin och Johansson El och Hushållsservice AB CVR 5566105424 | BoardBoard of Directors | Since 2021 | — | Dissolved |
| Svensk Kylteknik i Uppsala AB CVR 5566181318 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 102 AB CVR 5566400262 | BoardBoard of Directors | Since 2022 | — | Active |
| Rör & Värmeteknik i Sundsvall AB CVR 5566596077 | BoardBoard of Directors | Since 2022 | — | Active |
| Fenix Holding AB CVR 5566758818 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 104 AB CVR 5566792890 | BoardBoard of Directors | Since 2022 | — | Active |
| Specialistläkarhuset i Sundsvall AB CVR 5566946306 | BoardBoard of Directors | Since 2026 | — | Active |
| Energi & Driftteknik i Sundsvall AB CVR 5566951553 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 105 AB CVR 5567116404 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter Holding AB CVR 5567171664 | BoardBoard of Directors | Since 2020 | — | Active |
| Hedern Fastigheter 114 AB CVR 5567244826 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 107 AB CVR 5567326284 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 106 AB CVR 5567360309 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 313 AB CVR 5567424493 | BoardBoard of Directors | Since 2026 | — | Active |
| Hedern Invest AB CVR 5568093974 | BoardBoard of Directors | Since 2022 | — | Active |
| TWS System AB CVR 5568366420 | BoardBoard of Directors | Since 2025 | — | Active |
| Södra Järn AB CVR 5568393812 | BoardDeputy Board Member | Since 2022 | — | Active |
| Jämtlands kyl och värmecenter AB CVR 5568749096 | BoardBoard of Directors | Since 2020 | — | Dissolved |
| Falu Rörteknik AB CVR 5569044638 | BoardBoard of Directors | Since 2023 | — | Dissolved |
| Stenstans Värme & Sanitet AB CVR 5569171027 | BoardBoard of Directors | Since 2022 | — | Active |
| CoolFors Sweden AB CVR 5569362428 | BoardBoard of Directors | Since 2025 | — | Active |
| Konsult Mattias Lundstedt AB CVR 5569541831 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 109 AB CVR 5590280706 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 112 AB CVR 5590315742 | BoardBoard of Directors | Since 2022 | — | Dissolved |
| Hedern Fastigheter 312 AB CVR 5590323720 | BoardBoard of Directors | Since 2023 | — | Active |
| Hedern Fastigheter 304 AB CVR 5590939715 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 301 AB CVR 5590939723 | BoardBoard of Directors | Since 2022 | — | Active |
| Nordmassivet Holding AB CVR 5590947148 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 302 AB CVR 5590947288 | BoardBoard of Directors | Since 2022 | — | Active |
| Montani Invest AB CVR 5591154405 | BoardBoard of Directors | Since 2022 | — | Active |
| Mittvent AB CVR 5591241160 | OtherExternal Signatory | Since 2022 | — | Dissolved |
| Hedern Fastigheter 300 AB CVR 5591654123 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 396 AB CVR 5591727978 | BoardBoard of Directors | Since 2020 | — | Dissolved |
| Hedern Fastigheter 398 AB CVR 5591728240 | BoardBoard of Directors | Since 2020 | — | Dissolved |
| Hedern Fastigheter 399 AB CVR 5591728257 | BoardBoard of Directors | Since 2020 | — | Dissolved |
| Hedern Fastigheter 397 AB CVR 5591728471 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| Kyltec Sverige AB CVR 5591903231 | BoardBoard of Directors | Since 2022 | — | Dissolved |
| KTT Värme och VVS i Bergslagen AB CVR 5591914519 | BoardBoard of Directors | Since 2025 | — | Active |
| LiveFair AB CVR 5591962252 | BoardBoard of Directors | Since 2021 | — | Active |
| Radonkonsult Norrland AB CVR 5592266182 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 311 AB CVR 5592456106 | BoardBoard of Directors | Since 2022 | — | Active |
| Roventum AB CVR 5592491459 | BoardBoard of Directors | Since 2020 | — | Active |
| Hedern Fastigheter 111 AB CVR 5593301301 | BoardBoard of Directors | Since 2022 | — | Active |
| Hedern Fastigheter 113 AB CVR 5593852485 | BoardBoard of Directors | Since 2022 | — | Active |
| Fenix Lodges & Villas AB CVR 5594742636 | BoardBoard of Directors | Since 2024 | — | Active |
| TF Montage i Norrland AB CVR 5594805029 | BoardBoard of Directors | Since 2024 | — | Active |
| Castor Projektledning AB CVR 5595111161 | BoardBoard of Directors | Since 2024 | — | Active |
| Hedern Fastigheter 314 AB CVR 5595576363 | BoardBoard of Directors | Since 2025 | — | Active |
| Hedern Fastigheter 395 AB CVR 5595577486 | BoardBoard of Directors | Since 2025 | — | Dissolved |