| Biaxis Oy Ltd CVR 0116115-6 | OtherAudit | 2017 – 2019 | — | Active |
| Reka Industrial Oyj CVR 0693494-7 | OtherAudit | 2019 – 2021 | — | Active |
| Sinch Finland Systems Oy CVR 0736045-5 | OtherAudit | 2019 – 2021 | — | Dissolved |
| Inission Power Finland Oy CVR 0761776-7 | OtherDeputy auditor | 2017 – 2021 | — | Active |
| Alnus Oy CVR 0762281-4 | OtherAudit | 2019 – 2021 | — | Dissolved |
| Jujo Thermal Oy CVR 0842018-1 | OtherAudit | 2008 – 2023 | — | Active |
| Reka Kumi Oy CVR 0870234-9 | OtherAudit | 2020 – 2021 | — | Active |
| Veikkaus Solutions Oy CVR 0907868-0 | OtherAudit | 2011 – 2023 | — | Active |
| Saint-Gobain Finland Oy CVR 0951555-3 | OtherAudit | 2022 – 2023 | — | Active |
| Dahl Suomi Oy CVR 0992466-4 | OtherAudit | 2022 – 2023 | — | Active |
| Tank Service Finland Oy CVR 1049516-6 | OtherAudit | 2019 – 2023 | — | Active |
| Reka Kaapeli Oy CVR 1110846-3 | OtherAudit | 2019 – 2021 | — | Active |
| SAP Finland Oy CVR 1474185-4 | OtherAudit | 2019 – 2023 | — | Active |
| Alko Oy CVR 1505551-4 | OtherAudit | 2021 – 2022 | — | Active |
| Spectra Yhtiöt Oy CVR 1539578-9 | OtherAudit | 2022 – 2023 | — | Active |
| Sinch Finland Oy CVR 1549817-1 | OtherAudit | 2019 – 2021 | — | Active |
| Neste Markkinointi Oy CVR 1626490-8 | OtherAudit | 2022 – 2023 | — | Active |
| Tapiolan Alueen Kehitys Oy CVR 1648063-5 | OtherAudit | 2019 – 2023 | — | Active |
| Kiinteistö Oy Vantaan Tammiston Kauppatie 33 CVR 1650195-0 | OtherAudit | 2012 – 2020 | — | Active |
| Tecnotree Oyj CVR 1651577-0 | OtherAudit | 2017 – 2019 | — | Active |
| Luotea Oyj CVR 1680140-0 | OtherAudit | 2019 – 2022 | — | Active |
| Sihvari Oy CVR 1772768-7 | OtherAudit | 2021 – 2022 | — | Active |
| L&T Relations Oy CVR 1843407-7 | OtherAudit | 2012 – 2022 | — | Dissolved |
| L&T Toimi Oy CVR 1843410-6 | OtherAudit | 2012 – 2022 | — | Dissolved |
| Neste Oyj CVR 1852302-9 | OtherAudit | 2022 – 2023 | — | Active |
| Siili Solutions Oyj CVR 1979903-5 | OtherAudit | 2019 – 2023 | — | Active |
| Kiinteistö Oy Espoon Keilaranta 21 CVR 2044523-4 | OtherAudit | 2022 – 2023 | — | Active |
| Neste Shipping Oy CVR 2079740-8 | OtherAudit | 2022 – 2023 | — | Active |
| Metsämarkka 1 Oy CVR 2118799-4 | OtherAudit | 2019 – 2021 | — | Active |
| Warasto 3PL Oy CVR 2139692-1 | OtherAudit | 2019 – 2019 | — | Active |
| Wetera Capital Oy CVR 2139699-9 | OtherAudit | 2017 – 2019 | — | Active |
| Serveco Oy CVR 2157797-6 | OtherAudit | 2021 – 2023 | — | Active |
| Vala Group Oy CVR 2176658-2 | OtherAudit | 2020 – 2023 | — | Active |
| Enedo Holding Oy CVR 2190644-2 | OtherDeputy auditor | 2017 – 2021 | — | Dissolved |
| Alfaroc Oy CVR 2247751-2 | OtherAudit | 2017 – 2019 | — | Active |
| Turun Seudun Hyötykuljetus Oy CVR 2532329-5 | OtherAudit | 2021 – 2022 | — | Dissolved |
| Suomen Keräystuote Oy CVR 2550279-5 | OtherAudit | 2013 – 2022 | — | Active |
| Navidom Oy CVR 2612951-5 | OtherAudit | 2022 – 2023 | — | Active |
| SSC Esko Oy CVR 2614872-4 | OtherAudit | 2022 – 2023 | — | Active |
| SSC Lunni Oy CVR 2614873-2 | OtherAudit | 2022 – 2023 | — | Active |
| SSC Uikku Oy CVR 2614875-9 | OtherAudit | 2022 – 2023 | — | Active |
| SSC Kiisla Oy CVR 2614876-7 | OtherAudit | 2022 – 2023 | — | Active |
| SSC Ahti Oy CVR 2614878-3 | OtherAudit | 2022 – 2023 | — | Active |
| SSC Ukko Oy CVR 2614879-1 | OtherAudit | 2022 – 2023 | — | Active |
| SSC Suula Oy CVR 2614880-4 | OtherAudit | 2022 – 2023 | — | Active |
| Oakland Service Oy CVR 2726320-6 | OtherAudit | 2020 – 2023 | — | Active |
| Veikkaus Oy CVR 2765220-1 | OtherAudit | 2021 – 2023 | — | Active |
| Recover Nordic Korjausrakentaminen Oy CVR 2768036-8 | OtherAudit | 2016 – 2019 | — | Dissolved |
| Leca Finland Oy CVR 2789863-1 | OtherAudit | 2022 – 2023 | — | Active |
| L&T Työllistämispalvelut Oy CVR 2831469-3 | OtherAudit | 2017 – 2022 | — | Dissolved |
| Siili One Oy CVR 2910186-8 | OtherAudit | 2019 – 2023 | — | Active |
| Siili Auto Oy CVR 3100537-3 | OtherAudit | 2019 – 2023 | — | Active |
| Luotea Kiinteistötekniikka Oy CVR 3155933-3 | OtherAudit | 2020 – 2022 | — | Active |
| Luotea Kiinteistöhuolto Oy CVR 3155934-1 | OtherAudit | 2020 – 2022 | — | Active |
| L&T Teollisuuspalvelut Oy CVR 3155936-8 | OtherAudit | 2020 – 2022 | — | Active |
| L&T Kiinteistöpalvelut tukitoiminnot Oy CVR 3155937-6 | OtherAudit | 2020 – 2023 | — | Active |
| L&T Ympäristöpalvelut Oy CVR 3155938-4 | OtherAudit | 2020 – 2022 | — | Active |
| Luotea Siivous Oy CVR 3155982-7 | OtherAudit | 2020 – 2022 | — | Active |
| Niagara Investments Oy CVR 3165155-1 | OtherAudit | 2020 – 2023 | — | Active |
| Niagara Investments Holding Oy CVR 3165158-6 | OtherAudit | 2020 – 2023 | — | Active |
| Fennica Gaming Oy CVR 3263018-9 | OtherAudit | 2022 – 2023 | — | Active |
| Saint-Gobain PAM Finland Oy CVR 3298511-5 | OtherAudit | 2022 – 2023 | — | Active |