| Polyamp Aktiebolag CVR 5561032763 | BoardBoard of Directors | Since 2024 | — | Active |
| Polyamp Instrument Aktiebolag CVR 5562219948 | BoardBoard of Directors | Since 2024 | — | Active |
| ab1 Commercial Solutions AB CVR 5565563995 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| ab1 Linköping AB CVR 5565938486 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| ab1 Utveckling AB CVR 5566308747 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| ab1 Consulting AB CVR 5566403969 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| T21 Affärsnytta Aktiebolag CVR 5566572789 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| ab1 Infrastruktur AB CVR 5567008940 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| ab1 Utveckling Syd AB CVR 5567254973 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| ab1 Utveckling Väst AB CVR 5567298152 | BoardBoard of Directors | Since 2019 | — | Dissolved |
| OH Infra Consulting Sweden AB CVR 5591194179 | BoardBoard of Directors | Since 2026 | — | Active |
| T21 Essence Management & Consulting Group AB CVR 5591256499 | BoardBoard of Directors | Since 2022 | — | Active |
| Noedo IT-Consulting AB CVR 5591362594 | BoardDeputy Board Member | Since 2022 | — | Active |
| Ready Player One Consulting AB CVR 5591363899 | BoardDeputy Board Member | Since 2022 | — | Active |
| M44 Investment AB CVR 5595637355 | BoardBoard of Directors | Since 2025 | — | Active |
