| OAK-A | Oaktree Cap Group Llc [Oak/Pa] | 20.18 | 20.00 | 20.13 | 3.7K | 0.04 | | 0.20 | |
| OAK-B | Brookfield Oaktree Holdings Llc [Oak/Pb] | 19.87 | 19.78 | 19.81 | 7.4K | -0.14 | | 0.70 | |
| OCA.U | Omnichannel Acquisition Corp | 10.75 | 10.30 | 10.30 | 900 | 0.02 | | 0.19 | |
| OCA.W | Omnichannel Acquisition Corp WT | 0.0353 | 0.0351 | 0.0353 | 200 | -0.0047 | | 11.75 | |
| OCAC | Ocean Capital Acquisition Corporation | 9.990 | 9.990 | 9.990 | 200 | 0.010 | | 0.10 | |
| OHI | Omega Healthcare Investors | 46.85 | 45.89 | 46.22 | 1.02M | -0.07 | | 0.15 | |
| OIA | Invesco Muni Income Trust | 5.780 | 5.670 | 5.760 | 160.8K | 0.020 | | 0.35 | |
| OII | Oceaneering International | 39.34 | 36.33 | 39.28 | 1.6M | 2.65 | | 7.24 | |
| OPP-A | Rivernorth/Doubleline Strategic | 14.75 | 14.65 | 14.65 | 8.8K | -0.09 | | 0.61 | |
| OPP-B | Rivernorth/Doubleline Strategic | 16.02 | 15.81 | 15.81 | 1.7K | -0.13 | | 0.82 | |
| OPTU | Optimum Communications Inc | 0.6833 | 0.5500 | 0.6571 | 4.94M | 0.0594 | | 9.90 | |
| ORC | Orchid Island Capital Inc | 5.050 | 4.760 | 5.050 | 5.12M | 0.150 | | 3.06 | |
| ORI | Old Republic International Corp | 40.01 | 38.62 | 38.91 | 1.9M | -1.17 | | 2.92 | |
| OSG | Overseas Shipholding Group Inc | 4.820 | 4.660 | 4.745 | 202.1K | 0.030 | | 0.64 | |
| OTA.U | Starlink AI Acquisition Corporation | 10.35 | 10.30 | 10.30 | 4.1K | -0.01 | | 0.09 | |
| OTF | Blue Owl Technology Finance Corp | 9.225 | 9.010 | 9.120 | 1.35M | -0.030 | | 0.33 | |
| OXY | Occidental Petroleum Corp | 64.96 | 62.50 | 64.16 | 8.28M | 1.67 | | 2.67 | |
| OXY.W | Occidental Petroleum Corp WT [Oxy/W/I] | 42.90 | 40.92 | 42.35 | 66.4K | 1.88 | | 4.65 | |