| OAK-A | Oaktree Cap Group Llc [Oak/Pa] | 21.16 | 20.81 | 20.98 | 11.5K | -0.23 | | 1.08 | |
| OAK-B | Brookfield Oaktree Holdings Llc [Oak/Pb] | 20.85 | 20.64 | 20.72 | 23.4K | -0.14 | | 0.67 | |
| OHI | Omega Healthcare Investors | 51.37 | 50.20 | 50.98 | 1.19M | 0.36 | | 0.71 | |
| OIA | Invesco Muni Income Trust | 6.200 | 6.150 | 6.170 | 38.0K | -0.040 | | 0.64 | |
| OII | Oceaneering International | 51.48 | 46.49 | 48.02 | 1.45M | 3.02 | | 6.71 | |
| OPP | Doubleline Strategic Opportunity Fund | 7.710 | 7.610 | 7.620 | 35.3K | -0.100 | | 1.30 | |
| OPP-A | Rivernorth/Doubleline Strategic | 16.10 | 16.06 | 16.07 | 5.4K | -0.06 | | 0.34 | |
| OPP-B | Rivernorth/Doubleline Strategic | 17.20 | 16.94 | 16.95 | 9.0K | -0.23 | | 1.34 | |
| OPTU | Optimum Communications Inc | 0.9282 | 0.8300 | 0.8653 | 3.46M | -0.0265 | | 2.96 | |
| ORC | Orchid Island Capital Inc | 6.730 | 6.680 | 6.710 | 13.1K | 0.100 | | 1.51 | |
| ORI | Old Republic International Corp | 43.01 | 39.85 | 41.34 | 886.1K | -0.28 | | 0.67 | |
| OSG | Overseas Shipholding Group Inc | 5.800 | 5.520 | 5.530 | 264.0K | -0.300 | | 5.14 | |
| OTA.U | Starlink AI Acquisition Corporation | 10.17 | 10.10 | 10.13 | 9.5K | 0.03 | | 0.30 | |
| OTAI | Starlink AI Acquisition Corp. | 10.060 | 9.910 | 9.910 | 3.7K | -0.015 | | 0.15 | |
| OTF | Blue Owl Technology Finance Corp | 9.980 | 9.780 | 9.935 | 1.61M | -0.020 | | 0.20 | |
| OXY | Occidental Petroleum Corp | 57.87 | 56.77 | 57.20 | 26.9K | -0.40 | | 0.69 | |
| OXY.W | Occidental Petroleum Corp WT [Oxy/W/I] | 36.87 | 35.55 | 35.65 | 57.8K | 0.17 | | 0.48 | |