| OAK-A | Oaktree Cap Group Llc [Oak/Pa] | 21.26 | 21.11 | 21.23 | 3.0K | 0.07 | | 0.32 | |
| OAK-B | Brookfield Oaktree Holdings Llc [Oak/Pb] | 21.20 | 21.10 | 21.16 | 2.5K | -0.05 | | 0.26 | |
| OHI | Omega Healthcare Investors | 50.10 | 49.02 | 49.65 | 310.6K | 0.62 | | 1.26 | |
| OIA | Invesco Muni Income Trust | 6.210 | 6.180 | 6.180 | 38.9K | -0.045 | | 0.72 | |
| OII | Oceaneering International | 39.68 | 38.83 | 39.24 | 163.0K | 0.38 | | 0.98 | |
| OPP | Doubleline Strategic Opportunity Fund | 7.710 | 7.660 | 7.690 | 46.4K | 0.010 | | 0.13 | |
| OPP-A | Rivernorth/Doubleline Strategic | 16.28 | 16.19 | 16.19 | 3.3K | -0.02 | | 0.12 | |
| OPP-B | Rivernorth/Doubleline Strategic | 17.43 | 17.33 | 17.38 | 4.9K | 0.08 | | 0.46 | |
| OPTU | Optimum Communications Inc | 1.400 | 1.200 | 1.285 | 6.27M | 0.055 | | 4.47 | |
| ORC | Orchid Island Capital Inc | 6.930 | 6.780 | 6.805 | 2.79M | -0.090 | | 1.31 | |
| ORI | Old Republic International Corp | 42.35 | 41.57 | 41.82 | 175.6K | 0.24 | | 0.58 | |
| OSG | Overseas Shipholding Group Inc | 6.560 | 6.400 | 6.460 | 104.1K | 0.040 | | 0.62 | |
| OTA.U | Starlink AI Acquisition Corporation | 10.19 | 10.12 | 10.17 | 6.1K | 0.02 | | 0.20 | |
| OTF | Blue Owl Technology Finance Corp | 10.64 | 10.35 | 10.40 | 619.3K | 0.03 | | 0.24 | |
| OXY | Occidental Petroleum Corp | 50.43 | 48.89 | 50.02 | 2.44M | 1.20 | | 2.46 | |
| OXY.W | Occidental Petroleum Corp WT [Oxy/W/I] | 27.23 | 26.53 | 26.93 | 21.0K | -0.03 | | 0.11 | |