| OAK-A | Oaktree Cap Group Llc [Oak/Pa] | 20.39 | 20.15 | 20.33 | 13.9K | 0.02 | | 0.10 | |
| OAK-B | Brookfield Oaktree Holdings Llc [Oak/Pb] | 20.23 | 20.15 | 20.22 | 39.5K | -0.05 | | 0.25 | |
| OCA.U | Omnichannel Acquisition Corp | 10.61 | 10.23 | 10.28 | 1.9K | -0.02 | | 0.19 | |
| OCAC | Ocean Capital Acquisition Corporation | 9.990 | 9.980 | 9.990 | 82.7K | 0.010 | | 0.10 | |
| OHI | Omega Healthcare Investors | 46.90 | 46.36 | 46.55 | 522.9K | -0.14 | | 0.30 | |
| OIA | Invesco Muni Income Trust | 5.690 | 5.370 | 5.610 | 716.6K | 0.230 | | 4.28 | |
| OII | Oceaneering International | 45.80 | 43.62 | 44.20 | 543.4K | -1.62 | | 3.53 | |
| OPP | Doubleline Strategic Opportunity Fund | 6.980 | 6.847 | 6.900 | 94.5K | 0.040 | | 0.58 | |
| OPP-A | Rivernorth/Doubleline Strategic | 15.19 | 15.00 | 15.00 | 2.0K | -0.05 | | 0.33 | |
| OPP-B | Rivernorth/Doubleline Strategic | 16.47 | 16.18 | 16.18 | 14.6K | -0.13 | | 0.80 | |
| OPTU | Optimum Communications Inc | 1.035 | 0.965 | 1.025 | 1.34M | 0.010 | | 0.99 | |
| ORC | Orchid Island Capital Inc | 5.795 | 5.670 | 5.770 | 5.72M | 0.090 | | 1.58 | |
| ORI | Old Republic International Corp | 38.10 | 37.65 | 38.06 | 764.3K | 0.03 | | 0.08 | |
| OTAI | Starlink AI Acquisition Corp. | 10.85 | 10.01 | 10.02 | 1.3K | 0.03 | | 0.28 | |
| OTF | Blue Owl Technology Finance Corp | 10.47 | 10.16 | 10.26 | 1.51M | 0.05 | | 0.49 | |
| OXY | Occidental Petroleum Corp | 56.33 | 54.76 | 54.94 | 4.62M | -1.16 | | 2.07 | |
| OXY.W | Occidental Petroleum Corp WT [Oxy/W/I] | 33.70 | 32.79 | 32.98 | 36.7K | -1.07 | | 3.14 | |