| Code | Name | High | Low | Close | Volume | Change | |
|---|
| O | Realty Income Corp | 65.10 | 64.41 | 64.81 | 1,316,000 | 0.16 |  | 0.25 |   |
| OAK | Oaktree Capital Group Llc | 41.48 | 40.91 | 41.00 | 147,000 | -0.38 |  | 0.92 | |
| OAK-A | Oaktree Cap Group Llc Series A Pfd | 24.82 | 24.67 | 24.70 | 12,000 | 0.00 |  | 0.00 | |
| OAK-B | Oaktree Capital Group Llc Pfd Unit Ser B | 24.46 | 24.23 | 24.46 | 11,900 | 0.20 | | 0.82 | |
| OAS | Oasis Petroleum Inc | 6.670 | 6.430 | 6.630 | 6,397,200 | 0.090 | | 1.38 | |
| OBE | Obsidian Energy Ltd | 0.4900 | 0.4700 | 0.4700 | 473,500 | -0.0250 | | 5.05 | |
| OC | Owens Corning Inc | 48.49 | 46.02 | 48.29 | 1,895,400 | 1.94 | | 4.19 | |
| OCN | Ocwen Financial Corp | 1.900 | 1.830 | 1.870 | 423,900 | -0.010 | | 0.53 | |
| ODC | Oil-Dri Corporation of America | 28.94 | 27.86 | 28.16 | 5,700 | 0.16 | | 0.57 | |
| OEC | Orion Engineered Carbons S.A R | 27.56 | 26.95 | 27.47 | 244,600 | 0.47 | | 1.74 | |
| OFC | Corporate Office Properties | 23.54 | 23.16 | 23.34 | 803,700 | 0.07 | | 0.30 | |
| OFG | Oriental Financial Group | 18.22 | 17.85 | 17.95 | 393,600 | -0.19 | | 1.05 | |
| OFG-A | Oriental Fin Mips A | 24.43 | 24.30 | 24.30 | 4,300 | -0.06 | | 0.25 | |
| OFG-B | Oriental Finl Pfd B | 24.30 | 24.29 | 24.30 | 1,900 | 0.06 | | 0.25 | |
| OFG-D | Oriental Financial Group Inc | 24.63 | 24.50 | 24.50 | 1,400 | -0.20 | | 0.81 | |
| OGE | Oge Energy Corp | 40.44 | 40.00 | 40.19 | 1,461,500 | 0.20 | | 0.50 | |
| OGS | One Gas Inc | 81.83 | 80.12 | 81.59 | 369,000 | 1.03 | | 1.28 | |
| OHI | Omega Healthcare Investors | 38.25 | 37.90 | 38.23 | 1,388,700 | 0.19 | | 0.50 | |
| OI | Owens-Illinois | 19.18 | 18.77 | 18.99 | 1,472,100 | 0.20 | | 1.06 | |
| OIA | Invesco Muni Income Trust | 7.460 | 7.370 | 7.430 | 61,700 | 0.020 | | 0.27 | |
| OIB.C | Oi S.A. | 1.770 | 1.670 | 1.710 | 3,241,200 | 0.030 | | 1.79 | |
| OII | Oceaneering International | 15.69 | 14.91 | 15.61 | 895,000 | 0.22 | | 1.43 | |
| OIS | Oil States International | 17.94 | 17.34 | 17.73 | 850,300 | -0.28 | | 1.55 | |
| OKE | Oneok Inc | 62.08 | 60.74 | 61.90 | 2,389,100 | 0.73 | | 1.19 | |
| OLN | Olin Corp | 23.14 | 22.52 | 23.06 | 1,256,900 | 0.31 | | 1.36 | |
| OLP | One Liberty Properties | 26.50 | 26.00 | 26.31 | 38,100 | 0.19 | | 0.73 | |
| OMA.U | One Madison Group | 10.45 | 10.45 | 10.45 | 100 | 0.00 | | 0.00 | |
| OMA.W | One Madison Corp. Warrants | 0.8000 | 0.7900 | 0.8000 | 700 | 0.0500 | | 6.67 | |
| OMAD | One Madison Corporation Class A | 10.06 | 10.06 | 10.06 | 103,000 | 0.00 | | 0.00 | |
| OMC | Omnicom Group Inc | 74.68 | 73.75 | 74.35 | 1,949,200 | -0.32 | | 0.43 | |
| OMF | Onemain Holdings Inc | 28.67 | 27.99 | 28.49 | 381,100 | 0.37 | | 1.32 | |
| OMI | Owens & Minor | 7.605 | 7.180 | 7.330 | 1,868,900 | -0.300 | | 3.93 | |
| OMN | Omnova Solutions Inc | 8.260 | 7.990 | 8.250 | 78,100 | 0.190 | | 2.36 | |
| OMP | Oasis Midstream Partners LP | 19.04 | 18.33 | 18.57 | 123,300 | -0.23 | | 1.22 | |
| ONDK | On Deck Capital Inc | 7.200 | 6.890 | 7.000 | 508,200 | -0.080 | | 1.13 | |
| ONE | Onesmart International Education Group | 8.950 | 8.440 | 8.590 | 160,100 | -0.330 | | 3.70 | |
| OOMA | Ooma Inc | 15.42 | 14.67 | 15.38 | 91,800 | 0.57 | | 3.85 | |
| OPP | Rivernorth/Doubleline Strategic | 16.68 | 16.42 | 16.57 | 48,000 | -0.09 | | 0.54 | |
| OPY | Oppenheimer Holdings | 27.71 | 27.09 | 27.62 | 51,300 | 0.32 | | 1.17 | |
| OR | Osisko Gold Royalties Ltd | 8.990 | 8.885 | 8.920 | 226,500 | 0.000 | | 0.00 | |
| ORA | Ormat Technologies | 55.31 | 53.96 | 54.89 | 112,000 | 0.60 | | 1.11 | |
| ORAN | Orange ADR | 15.36 | 15.22 | 15.34 | 398,600 | 0.17 | | 1.12 | |
| ORC | Orchid Island Capital Inc | 6.840 | 6.730 | 6.750 | 570,500 | -0.060 | | 0.88 | |
| ORCL | Oracle Corp | 48.91 | 47.81 | 48.58 | 12,711,200 | 0.52 | | 1.08 | |
| ORI | Old Republic International Corp | 21.86 | 21.41 | 21.47 | 2,062,800 | -0.13 | | 0.60 | |
| ORN | Orion Group Holdings Inc | 4.970 | 4.760 | 4.940 | 149,800 | 0.120 | | 2.49 | |
| OSB | Norbord Inc | 28.18 | 27.07 | 27.95 | 183,900 | 0.81 | | 2.98 | |
| OSG | Overseas Shipholding Group Inc | 2.040 | 1.980 | 2.010 | 160,000 | -0.040 | | 1.95 | |
| OSK | Oshkosh Truck Corp | 71.41 | 67.81 | 70.60 | 1,048,600 | 2.06 | | 3.01 | |
| OSLE | Oaktree Specialty Lending Corp | 25.19 | 24.90 | 24.90 | 3,000 | -0.30 | | 1.19 | |
| OUT | Outfront Media Inc | 20.51 | 20.16 | 20.45 | 665,200 | 0.01 | | 0.05 | |
| OXM | Oxford Industries | 76.28 | 73.88 | 75.33 | 179,200 | 0.60 | | 0.80 | |
| OXY | Occidental Petroleum Corp | 66.10 | 64.45 | 65.83 | 4,767,400 | 0.69 | | 1.06 | |
| OZM | Och-Ziff Capital Management | 12.68 | 11.34 | 12.20 | 237,900 | 0.92 | | 8.16 | |