| OAK-B | Brookfield Oaktree Holdings Llc [Oak/Pb] | 20.80 | 20.75 | 20.75 | 25.5K | -0.06 | | 0.29 | |
| OHI | Omega Healthcare Investors | 51.97 | 51.17 | 51.40 | 869.1K | -0.32 | | 0.62 | |
| OIA | Invesco Muni Income Trust | 6.200 | 6.070 | 6.130 | 104.2K | -0.030 | | 0.49 | |
| OII | Oceaneering International | 53.98 | 51.10 | 52.20 | 985.2K | -0.53 | | 1.01 | |
| OPP | Doubleline Strategic Opportunity Fund | 7.700 | 7.616 | 7.616 | 55.4K | -0.030 | | 0.39 | |
| OPP-A | Rivernorth/Doubleline Strategic | 16.11 | 16.00 | 16.00 | 7.0K | -0.06 | | 0.37 | |
| OPP-B | Rivernorth/Doubleline Strategic | 17.12 | 17.02 | 17.02 | 8.9K | 0.03 | | 0.18 | |
| OPTU | Optimum Communications Inc | 0.8400 | 0.7471 | 0.7612 | 4.85M | -0.0462 | | 5.73 | |
| ORC | Orchid Island Capital Inc | 6.629 | 6.480 | 6.490 | 5.95M | -0.050 | | 0.76 | |
| ORI | Old Republic International Corp | 43.42 | 42.20 | 43.08 | 817.5K | 0.78 | | 1.84 | |
| OSG | Overseas Shipholding Group Inc | 5.790 | 5.480 | 5.750 | 176.2K | 0.150 | | 2.68 | |
| OTA.U | Starlink AI Acquisition Corporation | 10.14 | 10.11 | 10.13 | 7.9K | 0.01 | | 0.10 | |
| OTAI | Starlink AI Acquisition Corp. | 9.960 | 9.930 | 9.950 | 8.9K | 0.015 | | 0.15 | |
| OTF | Blue Owl Technology Finance Corp | 10.18 | 9.86 | 10.08 | 1.4M | 0.12 | | 1.21 | |
| OXY | Occidental Petroleum Corp | 56.49 | 54.91 | 54.93 | 5.21M | -2.37 | | 4.14 | |
| OXY.W | Occidental Petroleum Corp WT [Oxy/W/I] | 34.50 | 32.99 | 32.99 | 38.4K | -2.28 | | 6.46 | |