| NASDAQ | OAKU | 1 |
| NASDAQ | OAS | 53 |
| NASDAQ | OB | 10 |
| NASDAQ | OBCI | 13 |
| NASDAQ | OBIO | 20 |
| NASDAQ | OBNK | 19 |
| NASDAQ | OBT | 20 |
| NASDAQ | OCAX | 1 |
| NASDAQ | OCC | 19 |
| NASDAQ | OCCI | 55 |
| NASDAQ | OCDX | 10 |
| NASDAQ | OCFC | 87 |
| NASDAQ | OCGN | 56 |
| NASDAQ | OCSL | 185 |
| NASDAQ | OCUL | 89 |
| NASDAQ | OCUP | 9 |
| NASDAQ | OCX | 18 |
| NASDAQ | ODFL | 53 |
| NASDAQ | ODP | 77 |
| NASDAQ | OEG | 14 |
| NASDAQ | OESX | 107 |
| NASDAQ | OFED | 6 |
| NASDAQ | OFIX | 74 |
| NASDAQ | OFLX | 25 |
| NASDAQ | OFS | 11 |
| NASDAQ | OKTA | 332 |
| NASDAQ | OKUR | 12 |
| NASDAQ | OLB | 13 |
| NASDAQ | OLED | 96 |
| NASDAQ | OLLI | 47 |
| NASDAQ | OLMA | 59 |
| NASDAQ | OLPX | 15 |
| NASDAQ | OM | 179 |
| NASDAQ | OMCC | 12 |
| NASDAQ | OMCL | 236 |
| NASDAQ | OMDA | 3 |
| NASDAQ | OMER | 43 |
| NASDAQ | OMEX | 23 |
| NASDAQ | OMGA | 6 |
| NASDAQ | OMIC | 11 |
| NASDAQ | OMQS | 2 |
| NASDAQ | ON | 213 |
| NASDAQ | ONB | 59 |
| NASDAQ | ONC | 47 |
| NASDAQ | ONCO | 6 |
| NASDAQ | ONCR | 15 |
| NASDAQ | ONCS | 53 |
| NASDAQ | ONCT | 10 |
| NASDAQ | ONCY | 13 |
| NASDAQ | ONDS | 31 |
