| OAK-A | Oaktree Cap Group Llc [Oak/Pa] | 20.20 | 20.03 | 20.20 | 5.3K | -0.03 | | 0.14 | |
| OAK-B | Brookfield Oaktree Holdings Llc [Oak/Pb] | 20.00 | 19.83 | 19.90 | 3.9K | -0.06 | | 0.28 | |
| OCA.U | Omnichannel Acquisition Corp | 10.61 | 10.23 | 10.28 | 1.9K | -0.02 | | 0.19 | |
| OCA.W | Omnichannel Acquisition Corp WT | 0.0353 | 0.0351 | 0.0353 | 200 | -0.0047 | | 11.75 | |
| OHI | Omega Healthcare Investors | 45.80 | 44.88 | 44.91 | 595.6K | -0.75 | | 1.64 | |
| OIA | Invesco Muni Income Trust | 5.780 | 5.700 | 5.750 | 190.3K | -0.040 | | 0.69 | |
| OII | Oceaneering International | 44.68 | 43.61 | 44.43 | 249.8K | 0.64 | | 1.46 | |
| OPP | Doubleline Strategic Opportunity Fund | 6.973 | 6.895 | 6.920 | 40.7K | -0.030 | | 0.43 | |
| OPP-A | Rivernorth/Doubleline Strategic | 14.82 | 14.75 | 14.75 | 1.1K | -0.05 | | 0.34 | |
| OPP-B | Rivernorth/Doubleline Strategic | 16.20 | 15.90 | 15.90 | 4.5K | -0.03 | | 0.19 | |
| OPTU | Optimum Communications Inc | 0.9298 | 0.8562 | 0.9126 | 1.23M | 0.0003 | | 0.03 | |
| ORC | Orchid Island Capital Inc | 5.020 | 4.750 | 4.775 | 5.33M | -0.200 | | 4.02 | |
| ORI | Old Republic International Corp | 39.70 | 39.20 | 39.27 | 623.7K | -0.39 | | 0.98 | |
| OSG | Overseas Shipholding Group Inc | 4.670 | 4.550 | 4.635 | 85.9K | -0.040 | | 0.86 | |
| OTA.U | Starlink AI Acquisition Corporation | 10.30 | 10.26 | 10.28 | 3.8K | -0.02 | | 0.19 | |
| OTF | Blue Owl Technology Finance Corp | 9.230 | 8.920 | 9.010 | 1.82M | -0.120 | | 1.31 | |
| OXY | Occidental Petroleum Corp | 63.06 | 61.49 | 62.72 | 5.47M | 0.34 | | 0.55 | |
| OXY.W | Occidental Petroleum Corp WT [Oxy/W/I] | 41.00 | 39.70 | 40.85 | 63.3K | 0.51 | | 1.26 | |