| VÄSTANFORS-VÄSTERVÅLA FÖRSAMLING CVR 2520040524 | BoardDeputy Board Member | Since 2022 | — | Active |
| Norbergs Fastighetsaktiebolag CVR 5560371337 | BoardDeputy Board Member | Since 2024 | — | Active |
| Ernsts Express Aktiebolag CVR 5560398231 | BoardBoard of Directors | Since 2022 | — | Active |
| Sörmlast Aktiebolag CVR 5560605528 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| m4 Fastigheter AB CVR 5560924465 | BoardBoard of Directors | Since 2020 | — | Active |
| LBC Västerås Aktiebolag CVR 5560979782 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| m4 Utveckling AB CVR 5561213025 | BoardBoard of Directors | Since 2020 | — | Active |
| Triofrakt Aktiebolag CVR 5561781880 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| Steingruber Transport Aktiebolag CVR 5564388071 | BoardBoard of Directors | Since 2022 | — | Active |
| m4 Ballast AB CVR 5564523412 | BoardBoard of Directors | Since 2020 | — | Active |
| CEAB i Avesta Aktiebolag CVR 5565758785 | BoardBoard of Directors | Since 2021 | — | Active |
| Ernex Fastighets AB CVR 5566603675 | BoardBoard of Directors | Since 2021 | — | Active |
| Förskolan Västanvinden i Västerås AB CVR 5567460489 | BoardBoard of Directors | Since 2022 | — | Active |
| m4 gruppen Aktiebolag CVR 5567878318 | BoardBoard of Directors | Since 2020 | — | Active |
| m4 Delägare AB CVR 5567970586 | BoardBoard of Directors | Since 2020 | — | Active |
| Bröderna Holmström Ombenning AB CVR 5568501885 | BoardBoard of Directors | Since 2020 | — | Active |
| ProcessMekanik i Västerås AB CVR 5569374647 | BoardDeputy Board Member | Since 2022 | — | Active |
| m4 Löparängen AB CVR 5593739898 | BoardBoard of Directors | Since 2025 | — | Active |
| Mats Jacob Holmström CVR 6305306950 | OtherStakeholder | Since 1995 | — | Active |