| Suomen Terätuonti Oy CVR 1736033-6 | BoardChairperson | Since 2026 | — | Active |
| Suomen Kulutusosa Oy CVR 2305580-5 | BoardChairperson | Since 2024 | — | Active |
| Öljycenter Finland Oy CVR 2494106-7 | BoardChairperson | Since 2025 | — | Active |
| Cruselli Oy CVR 2595683-4 | BoardBoard of Directors | Since 2014 | — | Active |
| Sponsor Partners Oy CVR 2600113-2 | OtherConfidential Clerk | Since 2014 | — | Active |
| Sponsor GP V Oy CVR 3130610-9 | OtherConfidential Clerk | Since 2021 | — | Active |
| Fasteo Group Oy CVR 3263315-2 | BoardChairperson | Since 2022 | — | Active |
| Vantaan Kiinnike ja Rak Oy CVR 3264256-9 | BoardChairperson | Since 2022 | — | Active |
| Airfil Oy CVR 3348430-4 | BoardChairperson | Since 2024 | — | Active |
| Sponosa Holding Oy CVR 3363776-1 | BoardChairperson | Since 2023 | — | Dissolved |
| Sponosa Group Oy CVR 3391141-7 | BoardChairperson | Since 2023 | — | Dissolved |
| Sponsor GP VI Oy CVR 3474569-2 | OtherPerson with significant control | Since 2024 | — | Active |
| Corewood Oy CVR 3525656-7 | BoardChairperson | Since 2025 | — | Active |
| Sponforest Midco Oy CVR 3525657-5 | BoardChairperson | Since 2025 | — | Active |
| Sponforest Holding Oy CVR 3525658-3 | BoardChairperson | Since 2025 | — | Active |
| Haukka Topco Oy CVR 3550571-1 | BoardBoard of Directors | Since 2025 | — | Active |
