| ONON | On Holding AG | Consumer Cyclical | $10.0B | — | 0 |
| ON | ON Semiconductor Corporation | Technology | $28.5B | — | 0 |
| ONAR | ONAR Holding Corporation | Communication Services | $1.9M | — | 0 |
| OFRM | Once Upon A Farm Pbc | Consumer Defensive | $693M | — | 0 |
| ONCY | Oncolytics Biotech Inc. | Healthcare | $68.2M | — | 0 |
| ONCO | Onconetix, Inc. | Healthcare | $3.3M | — | 0 |
| OTLC | Oncotelic Therapeutics, Inc. | Healthcare | $10.8M | — | 0 |
| ONDS | Ondas Holdings Inc. | Technology | $4.3B | — | 0 |
| YDDL | One and one Green Technologies. Inc | Industrials | $65.1M | — | 0 |
| OBULF | One Bullion Ltd | — | — | — | 0 |
| OGS | ONE Gas, Inc. | Utilities | $4.5B | — | 0 |
| OLP | One Liberty Properties, Inc. | Real Estate | $491M | — | 0 |
| OSS | One Stop Systems, Inc. | Technology | $231M | — | 0 |
| OWPC | One World Products, Inc. | Healthcare | $0.1M | — | 0 |
| ONEG | OneConstruction Group Limited | Industrials | $16.2M | — | 0 |
| OIMAU | Oneim Acquisition Corp. | Financial Services | $295M | — | 0 |
| OMF | OneMain Holdings, Inc. | Financial Services | $6.5B | — | 0 |
| ONMDW | OneMedNet Corporation | Healthcare | $40.2M | — | 0 |
| ONEI | OneMeta AI | Technology | $7.4M | — | 0 |
| OKE | ONEOK, Inc. | Energy | $57.5B | — | 0 |
| OSPN | OneSpan Inc. | Technology | $655M | — | 0 |
| OSW | OneSpaWorld Holdings Ltd | Consumer Cyclical | $2.3B | — | 0 |
| ONEW | OneWater Marine Inc. | Consumer Cyclical | $165M | — | 0 |
| ONFOP | Onfolio Holdings, Inc. | — | — | — | 0 |
| ONIT | Onity Group Inc. | Financial Services | $261M | — | 0 |