| OAK-A | Oaktree Cap Group Llc [Oak/Pa] | 20.33 | 20.07 | 20.21 | 9.2K | 0.06 | | 0.31 | |
| OAK-B | Brookfield Oaktree Holdings Llc [Oak/Pb] | 20.09 | 19.95 | 20.00 | 16.9K | -0.02 | | 0.10 | |
| OCA.U | Omnichannel Acquisition Corp | 10.29 | 10.29 | 10.29 | 100 | 0.07 | | 0.68 | |
| OCAC | Ocean Capital Acquisition Corporation | 9.980 | 9.960 | 9.980 | 1.6K | 0.010 | | 0.10 | |
| OHI | Omega Healthcare Investors | 47.85 | 46.71 | 46.99 | 3.07M | 0.04 | | 0.09 | |
| OIA | Invesco Muni Income Trust | 5.900 | 5.820 | 5.850 | 129.2K | -0.040 | | 0.68 | |
| OII | Oceaneering International | 51.40 | 50.51 | 51.09 | 1.14M | 0.52 | | 1.03 | |
| OPP | Doubleline Strategic Opportunity Fund | 7.480 | 7.342 | 7.360 | 64.1K | 0.020 | | 0.27 | |
| OPP-A | Rivernorth/Doubleline Strategic | 15.21 | 15.13 | 15.21 | 8.0K | 0.06 | | 0.40 | |
| OPP-B | Rivernorth/Doubleline Strategic | 16.45 | 16.22 | 16.43 | 23.7K | 0.20 | | 1.20 | |
| OPTU | Optimum Communications Inc | 1.070 | 0.987 | 1.020 | 1.51M | 0.055 | | 5.68 | |
| ORC | Orchid Island Capital Inc | 6.400 | 6.290 | 6.330 | 5.09M | -0.020 | | 0.31 | |
| ORI | Old Republic International Corp | 41.28 | 40.59 | 40.96 | 859.4K | 0.12 | | 0.29 | |
| OSG | Overseas Shipholding Group Inc | 5.070 | 4.805 | 4.840 | 440.7K | -0.150 | | 3.01 | |
| OTF | Blue Owl Technology Finance Corp | 10.87 | 10.67 | 10.71 | 1.53M | 0.02 | | 0.19 | |
| OXY | Occidental Petroleum Corp | 61.49 | 60.50 | 61.46 | 7.77M | 0.30 | | 0.49 | |
| OXY.W | Occidental Petroleum Corp WT [Oxy/W/I] | 39.50 | 38.78 | 39.50 | 60.7K | 0.18 | | 0.46 | |