| QUBT | Quantum Computing, Inc. | Technology | $2.1B | — | 0 |
| QMCO | Quantum Corporation | Technology | $1.2B | — | 0 |
| QUCY | Quantum Cyber N.V. | Healthcare | $30.5M | — | 0 |
| QNC | Quantum eMotion Corp. | Technology | $415M | — | 0 |
| QLEP-WT | Quantum Leap Acquisition Corp | — | — | — | 0 |
| QXL | Quantum X Labs Inc. | Technology | $68.9M | — | 0 |
| QSI | Quantum-Si incorporated | Healthcare | $158M | — | 0 |
| QS | QuantumScape Corporation | Consumer Cyclical | $3.0B | — | 0 |
| QUMSR | Quantumsphere Acquisition Corp. Rights | Financial Services | $41.1M | — | 0 |
| QGAI | Quantumzyme Corp. | — | — | — | 0 |
| QURT | Quarta-Rad, Inc. | Technology | $5.6M | — | 0 |
| QZMRF | Quartz Mountain Resources Ltd. | Basic Materials | $20.9M | — | 0 |
| QSEAU | Quartzsea Acquisition Corporation Units | Financial Services | $132M | — | 0 |
| QRED-RI | Quasaredge Acquisition Corporation | — | — | — | 0 |
| DGX | Quest Diagnostics Incorporated | Healthcare | $26.1B | — | 0 |
| QPRC | Quest Patent Research Corporation | Industrials | $1.3M | — | 0 |
| QRHC | Quest Resource Holding Corporation | Industrials | $28.9M | — | 0 |
| QWTR | Quest Water Global, Inc. | Industrials | $6.6M | — | 0 |
| QETAU | Quetta Acquisition Corporation Unit | Financial Services | $43.3M | — | 0 |
| QH | Quhuo Limited | Technology | $12.8M | — | 0 |
| QUIK | QuickLogic Corporation | Technology | $195M | — | 0 |
| QDEL | QuidelOrtho Corporation | Healthcare | $729M | — | 0 |
| QNCX | Quince Therapeutics, Inc. | Healthcare | $8.5M | — | 0 |
| QNST | QuinStreet, Inc. | Communication Services | $827M | — | 0 |
| QMLS | QumulusAI, Inc. | — | — | — | 0 |