| Ab Ingenjörsbyrå Soft Engineering Insinööritoimisto Oy CVR 1020635-2 | ManagementChief Executive Officer | Since 1994 | — | Active |
| Arcpro Ab CVR 1894062-3 | BoardBoard of Directors | Since 2022 | — | Active |
| Solf Energi Ab CVR 1917921-5 | BoardChairperson | Since 2021 | — | Active |
| Asunto Oy Vaasan Merihovi Bostads Ab CVR 2191506-6 | BoardBoard of Directors | Since 2023 | — | Active |
| Asunto Oy Sulvan Kukkaisniitty, Mustasaari - Bostads Ab Solf Blomsteräng, Korsholm CVR 2290212-8 | BoardChairperson | Since 2021 | — | Active |
| Asunto Oy Vaasan Rosenlind CVR 2981700-6 | BoardChairperson | Since 2020 | — | Active |
| Solf Idrottshall Ab CVR 3184746-6 | BoardChairperson | Since 2021 | — | Active |
| Berkshire Hattarway Ab CVR 3187423-7 | OtherConfidential Clerk | Since 2021 | — | Active |
| Fastighets Ab Torgvägen 2 - Kiinteistö Oy Torintie 2 CVR 3205196-1 | BoardChairperson | Since 2025 | — | Active |
| Kvarken Allaktivitetshall Ab CVR 3223222-8 | BoardChairperson | Since 2021 | — | Active |
| Rex Kiinteistökehitys Oy CVR 3233565-7 | BoardChairperson | Since 2021 | — | Active |
| Österbottens flis Ab CVR 3436706-2 | BoardChairperson | Since 2024 | — | Active |
| BESS Solutions Finland Oy CVR 3480736-3 | BoardChairperson | Since 2024 | — | Active |
| Data Center Nordics Oy CVR 3594253-2 | BoardBoard of Directors | Since 2026 | — | Active |
| JM Enterprises Oy CVR 3612476-9 | OtherDeputy Member | Since 2026 | — | Active |