| OBSJF | Obrascon Huarte Lain Brasil S.A. | 0.5100 | 0.5100 | 0.5100 | 5.0K | -0.0663 | | 11.50 | |
| OERLY | Oc Oerlikon Corp Unsp/Adr | 12.73 | 12.73 | 12.73 | 2.1K | -1.41 | | 9.97 | |
| OFED | Oconee Federal Fincl Corp | 21.50 | 19.95 | 21.50 | 500 | 1.55 | | 7.77 | |
| OLVI | Oliveda International Inc | 0.2513 | 0.1800 | 0.2047 | 82.9K | -0.0333 | | 13.99 | |
| OMHI | Om Holdings International Inc | 0.0010 | 0.0010 | 0.0010 | 500 | 0.0003 | | 42.86 | |
| OMMSF | Omineca Mining & Mtls Ord | 0.0470 | 0.0450 | 0.0450 | 300 | -0.0027 | | 5.66 | |
| OPMXF | Operadora DE Sites Mexicn | 0.9600 | 0.9490 | 0.9490 | 11.0K | -0.0382 | | 3.87 | |
| ORLCF | Oracle Commodity Hldg Crp | 0.0240 | 0.0205 | 0.0205 | 58.1K | -0.0034 | | 14.23 | |
| OROVY | Orient Overseas Inr U/Adr | 96.56 | 96.56 | 96.56 | 100 | 1.42 | | 1.50 | |
| ORWHF | Oriental Watch Holdings Ltd | 0.4613 | 0.4613 | 0.4613 | 100 | 0.0494 | | 11.99 | |
| OTLC | Oncotelic Therapeutcs Inc | 0.0480 | 0.0401 | 0.0436 | 229.4K | -0.0037 | | 7.82 | |
| OTMCF | Romios Gold Resources Inc | 0.3404 | 0.3200 | 0.3404 | 24.5K | 0.0146 | | 4.48 | |
| OXFYY | Oxford Nanopre Tech U/Adr | 6.050 | 6.050 | 6.050 | 100 | 0.080 | | 1.34 | |
| OZSC | Ozop Energy Solutions Inc | 0.0350 | 0.0310 | 0.0311 | 398.2K | -0.0008 | | 2.51 | |