| Axel Eriksson & Co Ab CVR 0364779-0 | OtherDeputy auditor | 1998 – 2022 | — | Active |
| Oy CMX Finland Ab CVR 0471734-0 | OtherDeputy auditor | 1999 – 2022 | — | Active |
| Einar Holmberg Ab CVR 0521613-4 | OtherDeputy auditor | 1998 – 2023 | — | Active |
| El-Man Konsult Ab CVR 0598290-4 | OtherDeputy auditor | 2004 – 2022 | — | Active |
| Bostads Ab Norragatan i Mariehamn CVR 0651395-8 | OtherDeputy auditor | 2003 – 2019 | — | Active |
| Re & G-Invest Ab CVR 0682651-6 | OtherDeputy auditor | 2004 – 2020 | — | Active |
| Fast Ab Havsglimt CVR 0725625-2 | OtherDeputy auditor | 2001 – 2022 | — | Active |
| Lion Music Ab Ltd CVR 0772656-8 | OtherDeputy auditor | 2003 – 2022 | — | Active |
| Inpro Borrteknik Åland Ab CVR 0804033-0 | OtherDeputy auditor | 2000 – 2021 | — | Active |
| Eckerö Hotell & Restaurang Ab CVR 0816103-6 | OtherDeputy auditor | 1998 – 2022 | — | Active |
| Bostads Ab Barrvägen 8 CVR 0834732-4 | OtherDeputy auditor | 2001 – 2022 | — | Active |
| Fastighets Ab Västra Utfarten CVR 0958068-9 | OtherDeputy auditor | 2000 – 2022 | — | Active |
| Fastighets Ab Havsgatan 24 CVR 1069244-2 | OtherDeputy auditor | 1997 – 2022 | — | Active |
| Mejorana Oy CVR 1100778-5 | OtherDeputy auditor | 1998 – 2022 | — | Active |
| Nunneberga Ab CVR 1475059-0 | OtherDeputy auditor | 1998 – 2022 | — | Active |
| A. Palmer Sailing Ab Ltd CVR 1532317-9 | OtherDeputy auditor | 1999 – 2019 | — | Active |
| Eckerö Golf Ab CVR 1743984-5 | OtherDeputy auditor | 2002 – 2023 | — | Dissolved |
| Ålbiocom Ab CVR 1786013-8 | OtherDeputy auditor | 2002 – 2019 | — | Active |
| Arkitektbyrå Tiina Holmberg Ab CVR 1860499-6 | OtherDeputy auditor | 2003 – 2022 | — | Active |
| Solberget Ab CVR 1881947-9 | OtherDeputy auditor | 2004 – 2022 | — | Dissolved |
