| OAK-A | Oaktree Cap Group Llc [Oak/Pa] | 20.61 | 20.50 | 20.60 | 3.3K | 0.08 | | 0.39 | |
| OAK-B | Brookfield Oaktree Holdings Llc [Oak/Pb] | 20.84 | 20.27 | 20.27 | 4.3K | -0.04 | | 0.20 | |
| OCA.U | Omnichannel Acquisition Corp | 11.00 | 10.22 | 10.22 | 200 | -0.01 | | 0.10 | |
| OCA.W | Omnichannel Acquisition Corp WT | 0.0400 | 0.0358 | 0.0358 | 36.9K | -0.0041 | | 10.28 | |
| OCAC | Ocean Capital Acquisition Corporation | 9.960 | 9.950 | 9.960 | 12.6K | 0.010 | | 0.10 | |
| OHI | Omega Healthcare Investors | 46.43 | 45.88 | 46.00 | 381.8K | -0.30 | | 0.65 | |
| OII | Oceaneering International | 51.78 | 50.00 | 50.60 | 303.8K | -0.62 | | 1.21 | |
| OPP-A | Rivernorth/Doubleline Strategic | 15.39 | 15.32 | 15.35 | 6.6K | 0.04 | | 0.24 | |
| ORC | Orchid Island Capital Inc | 6.780 | 6.670 | 6.685 | 6.59M | -0.050 | | 0.74 | |
| ORI | Old Republic International Corp | 42.55 | 41.94 | 42.08 | 403.7K | -0.17 | | 0.40 | |
| OSG | Overseas Shipholding Group Inc | 4.830 | 4.520 | 4.640 | 978.2K | 0.130 | | 2.88 | |
| OTA.U | Starlink AI Acquisition Corporation | 10.23 | 10.18 | 10.19 | 5.8K | -0.01 | | 0.05 | |
| OTAI | Starlink AI Acquisition Corp. | 10.005 | 9.980 | 9.991 | 11.1K | 0.006 | | 0.06 | |
| OTF | Blue Owl Technology Finance Corp | 11.43 | 11.22 | 11.39 | 1.78M | 0.08 | | 0.71 | |
| OXY | Occidental Petroleum Corp | 59.48 | 58.67 | 59.10 | 2.27M | -0.07 | | 0.12 | |
| OXY.W | Occidental Petroleum Corp WT [Oxy/W/I] | 37.35 | 36.85 | 37.01 | 14.2K | -0.19 | | 0.51 | |