| Name | TIDM | ISIN | Watchlist |
|---|---|---|---|
| Observe Medical ASA | OBSRV | NO0013457952 | |
| Ocean GeoLoop ASA | OCEAN | NO0010914641 | |
| Ocean Sun AS | OSUN | NO0010887565 | |
| Odfjell Drilling LTD | ODL | BMG671801022 | |
 Odfjell SE | ODF | NO0003399909 | |
| Odfjell Technology Ltd | OTL | BMG6716L1081 | |
 Okea ASA | OKEA | NO0010816895 | |
| Okeanis Eco Tankers Corp. | OET | MHY641771016 | |
 OMC TANKERS | OMC | NO0013759159 | |
| Omda AS | OMDA | NO0010894512 | |
| Oncoinvent ASA | ONCIN | NO0013711713 | |
 Orkla Group | ORK | NO0003733800 | |
 Otello Corporation ASA | OTEC | NO0010040611 | |
 Otovo ASA | OTOVO | NO0013721613 | |
| OUTLT | OUTLT | NO0013757500 |