| OAK-A | Oaktree Cap Group Llc [Oak/Pa] | 20.13 | 20.01 | 20.13 | 5.2K | 0.11 | | 0.55 | |
| OAK-B | Brookfield Oaktree Holdings Llc [Oak/Pb] | 20.00 | 19.84 | 19.84 | 1.7K | -0.03 | | 0.15 | |
| 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 | |
| OCAC | Ocean Capital Acquisition Corporation | 9.990 | 9.990 | 9.990 | 200 | 0.010 | | 0.10 | |
| OHI | Omega Healthcare Investors | 44.79 | 44.60 | 44.79 | 1.2K | 0.34 | | 0.76 | |
| OIA | Invesco Muni Income Trust | 5.810 | 5.710 | 5.740 | 81.5K | -0.060 | | 1.03 | |
| OII | Oceaneering International | 42.52 | 40.70 | 40.74 | 826 | -3.35 | | 7.60 | |
| OPP-A | Rivernorth/Doubleline Strategic | 14.61 | 14.47 | 14.52 | 10.5K | -0.26 | | 1.73 | |
| OPP-B | Rivernorth/Doubleline Strategic | 16.03 | 15.80 | 15.80 | 6.7K | -0.32 | | 1.95 | |
| OPTU | Optimum Communications Inc | 0.7038 | 0.7038 | 0.7038 | 1.0K | -0.0027 | | 0.38 | |
| ORI | Old Republic International Corp | 40.31 | 39.63 | 40.13 | 1.56M | 0.45 | | 1.13 | |
| OSG | Overseas Shipholding Group Inc | 4.770 | 4.675 | 4.740 | 137.8K | -0.020 | | 0.42 | |
| OTA.U | Starlink AI Acquisition Corporation | 10.30 | 10.29 | 10.29 | 2.0K | 0.00 | | 0.05 | |
| OTAI | Starlink AI Acquisition Corp. | 10.28 | 10.10 | 10.11 | 9.7K | 0.01 | | 0.10 | |
| OTF | Blue Owl Technology Finance Corp | 9.000 | 8.759 | 8.850 | 1.86M | -0.050 | | 0.56 | |
| OXY | Occidental Petroleum Corp | 63.71 | 63.10 | 63.36 | 34.1K | 0.66 | | 1.04 | |
| OXY.W | Occidental Petroleum Corp WT [Oxy/W/I] | 41.10 | 40.15 | 40.74 | 37.5K | -0.22 | | 0.54 | |