| OAK-A | Oaktree Cap Group Llc [Oak/Pa] | 21.06 | 20.65 | 20.79 | 11.4K | -0.11 | | 0.50 | |
| OAK-B | Brookfield Oaktree Holdings Llc [Oak/Pb] | 20.73 | 20.28 | 20.56 | 16.2K | -0.06 | | 0.29 | |
| OHI | Omega Healthcare Investors | 48.97 | 48.17 | 48.26 | 1.57M | -0.73 | | 1.49 | |
| OIA | Invesco Muni Income Trust | 6.050 | 5.960 | 6.010 | 122.0K | -0.010 | | 0.17 | |
| OII | Oceaneering International | 38.78 | 37.44 | 38.48 | 606.1K | 0.08 | | 0.21 | |
| OPP | Doubleline Strategic Opportunity Fund | 7.640 | 7.585 | 7.640 | 95.6K | 0.030 | | 0.39 | |
| OPP-A | Rivernorth/Doubleline Strategic | 16.71 | 16.61 | 16.62 | 1.8K | 0.02 | | 0.15 | |
| OPP-B | Rivernorth/Doubleline Strategic | 18.17 | 18.16 | 18.16 | 800 | 0.01 | | 0.06 | |
| OPTU | Optimum Communications Inc | 0.7756 | 0.6216 | 0.7137 | 5.42M | 0.0623 | | 9.56 | |
| ORC | Orchid Island Capital Inc | 6.875 | 6.690 | 6.830 | 4.42M | 0.050 | | 0.74 | |
| ORI | Old Republic International Corp | 39.78 | 38.92 | 39.65 | 1.85M | -0.21 | | 0.53 | |
| OSG | Overseas Shipholding Group Inc | 5.780 | 5.610 | 5.740 | 330.9K | -0.080 | | 1.37 | |
| OTA.U | Starlink AI Acquisition Corporation | 10.10 | 10.04 | 10.06 | 24.2K | 0.03 | | 0.25 | |
| OTF | Blue Owl Technology Finance Corp | 10.85 | 10.62 | 10.75 | 2.57M | -0.17 | | 1.56 | |
| OXY | Occidental Petroleum Corp | 60.84 | 58.02 | 58.83 | 13.98M | -0.04 | | 0.07 | |
| OXY.W | Occidental Petroleum Corp WT [Oxy/W/I] | 38.70 | 35.99 | 36.82 | 93.7K | -0.03 | | 0.08 | |