| Kiinteistö Oy Tampereen Hyllilänkatu 14 CVR 0863483-3 | OtherConfidential Clerk | Since 2025 | — | Active |
| Kiinteistö Oy Vantaan Koivukummuntie 14 CVR 1630710-3 | OtherConfidential Clerk | Since 2025 | — | Active |
| Kiinteistö Oy Joensuun Linjakuja 4 CVR 2395804-3 | OtherConfidential Clerk | Since 2025 | — | Active |
| Topicross Ky CVR 2597749-1 | ManagementChief Executive Officer | Since 2014 | — | Active |
| Pissapoika Oy CVR 3016158-5 | BoardBoard of Directors | Since 2019 | — | Active |
| KKOY Tuusulan hanslankarinkuja 5 CVR 3019197-9 | OtherConfidential Clerk | Since 2025 | — | Dissolved |
| Kiinteistö Oy Lavaväylä 7 CVR 3119457-3 | BoardBoard of Directors | Since 2025 | — | Active |
| KKOY Kuopion asevarikontie 12 CVR 3143754-7 | OtherConfidential Clerk | Since 2025 | — | Active |
| Nizzan Primera Oy CVR 3228761-6 | BoardBoard of Directors | Since 2021 | — | Active |
| Heikkinen Invest Oy CVR 3232723-5 | OtherConfidential Clerk | Since 2025 | — | Active |
| Heikkinen Capital Oy CVR 3289729-7 | BoardBoard of Directors | Since 2022 | — | Active |
| Floorman Capital Oy CVR 3373145-9 | OtherDeputy Member | Since 2023 | — | Active |
| Ylisoutaja Oy CVR 3468745-3 | OtherDeputy Member | Since 2024 | — | Active |
| Asunto Oy Penttilän Isla, Joensuu CVR 3474680-4 | OtherDeputy Member | Since 2024 | — | Active |
| Asunto Oy Penttilän Kosti, Joensuu CVR 3474681-2 | OtherDeputy Member | Since 2024 | — | Active |
| Kontticom Oy CVR 3511830-8 | BoardBoard of Directors | Since 2026 | — | Active |
