| Vansö Prästgård AB CVR 5560393653 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| Perssons Bilplåt Aktiebolag CVR 5562836634 | BoardDeputy Board Member | Since 2019 | — | Dissolved |
| Björn Gärtze Aktiebolag CVR 5563440782 | BoardBoard of Directors | Since 2021 | — | Active |
| Svenska Bilreservdelsdepån Aktiebolag CVR 5564134582 | BoardBoard of Directors | Since 2023 | — | Dissolved |
| Backa Industrihus Aktiebolag CVR 5565471967 | BoardDeputy Board Member | Since 2019 | — | Dissolved |
| Backa Industrihus Invest Aktiebolag CVR 5565471975 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| Bilreservdelsdepån Invest i Strängnäs Aktiebolag CVR 5565661427 | BoardDeputy Board Member | Since 2022 | — | Active |
| Gärtze Fastighetsförvaltning Aktiebolag CVR 5565807541 | BoardDeputy Board Member | Since 2022 | — | Active |
| Sundbyviks Transport AB CVR 5566642632 | BoardBoard of Directors | Since 2022 | — | Active |
| Fastighetsaktiebolaget Björn Gärtze CVR 5566973110 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| AB Stensborg Sexton CVR 5592094857 | BoardDeputy Board Member | Since 2022 | — | Active |
| Gärtze Holding AB CVR 5593416851 | BoardBoard of Directors | Since 2022 | — | Active |
| Eskilstuna Holding AB CVR 5593416869 | BoardDeputy Board Member | Since 2023 | — | Active |
| Gärtze Förvaltning AB CVR 5594028622 | BoardDeputy Board Member | Since 2022 | — | Active |
| AB Stockrosen Tolv i Eskilstuna CVR 5595256354 | BoardDeputy Board Member | Since 2025 | — | Active |