| SOUNW | SoundHound AI, Inc. | Technology | $1.0B | — | 0 |
| SSTI | SoundThinking, Inc. | Technology | $70.9M | — | 0 |
| SOR | Source Capital, Inc. | Financial Services | $374M | — | 0 |
| SOBO | South Bow Corporation | Energy | $7.2B | — | 0 |
| SDSYA | South Dakota Soybean Processors, LLC | Consumer Defensive | $243M | — | 0 |
| SPMEF | South Pacific Metals Corp. | — | — | — | 0 |
| SPFI | South Plains Financial, Inc. | Financial Services | $820M | — | 0 |
| STSBF | South Star Battery Metals Corp. | Basic Materials | $11.1M | — | 0 |
| SCE-PL | SOUTHERN CALIFORNIA EDISON Co | — | — | — | 0 |
| SCCO | Southern Copper Corporation | Basic Materials | $168B | — | 0 |
| NCOOU | Southern Cross Acquisition I Corp. | — | — | — | 0 |
| SCATU | Southern Cross Acquisition II Corp. | — | — | — | 0 |
| SXGCF | Southern Cross Gold Consolidated Ltd. | — | — | — | 0 |
| SFST | Southern First Bancshares, Inc. | Financial Services | $569M | — | 0 |
| SITS | Southern ITS International, Inc. | Industrials | $5.4M | — | 0 |
| SMBC | Southern Missouri Bancorp, Inc. | Financial Services | $795M | — | 0 |
| SSVFF | Southern Silver Exploration Corp. | Basic Materials | $165M | — | 0 |
| SLND-WT | Southland Holdings, Inc. | — | — | — | 0 |
| SBSI | Southside Bancshares, Inc. | Financial Services | $919M | — | 0 |
| SSB | SouthState Bank Corp. | Financial Services | $9.9B | — | 0 |
| LUV | Southwest Airlines Co. | Industrials | $20.3B | — | 0 |
| SWX | Southwest Gas Holdings, Inc. | Utilities | $5.9B | — | 0 |
| SNUS-PH | Sovereign Bancorp, Inc. | — | — | — | 0 |
| SOWG | Sow Good Inc. | Consumer Defensive | $42.7M | — | 0 |
| SCQC | SPACCircle Acquisition Corp. | — | — | — | 0 |