| St. Edwards University Department of Computer Science | Texas |
| St. Edwards University Department of Mathematics | Texas |
| St. Francis College | New York |
| St. George's University | New York |
| St. Jacques, Inc. | New Jersey |
| St. John Fisher University | New York |
| St. John's College | Maryland |
| St. John's University | New York |
| St. Johns River State College | Florida |
| St. Joseph's University | New York |
| St. Lawrence University | New York |
| St. Louis Arch Angels | Missouri |
| St. Louis Digital Media | |
| St. Louis Online | Missouri |
| St. Louis Perl Mongers | Missouri |
| St. Louis SEO Stars | |
| St. Mary's College of Maryland | Maryland |
| St. Mary's University Department of Computer Science | Texas |
| St. Mary's University Department of Mathematics | Texas |
| St. Norbert College Computer Science | Wisconsin |
| St. Norbert College Mathematics | Wisconsin |
| St. Olaf College Computer Science | Minnesota |
| St. Olaf College Mathematics | Minnesota |
| St. Paul Cooperative Telephone | Oregon |
| St. Paul's School | New Hampshire |
| St. Pete Catalyst | Florida |
| St. Petersburg College | Florida |
| St. Teresa Medical, Inc. | Minnesota |
| St. Thomas Aquinas College | New York |
| St. Thomas University Bachelor of Science in Computer Science | Florida |
| St. Thomas University Bachelor of Science in Data Science and Applied Mathematics | Florida |
| ST8 Creative Solutions, Inc. | California |
| STA Digital | Illinois |
| STA Group, LLC | Illinois |
| STAAR Surgical | California |
| Stabie-Soft, Inc. | Texas |
| Stability Biologics | Tennessee |
| StabilizOrtho | Pennsylvania |
| StabiLux Biosciences, Inc. | |
| Stabl, Inc. | |
| Stable | California |
| Stable Host | Arizona |
| Stable Kernel, Inc. | Georgia |
| Stable Sea | |
| Stablecog, Inc. | |
| StableLogic, Inc. | Massachusetts |
| Stablenet | North Carolina |
| Stablix, Inc. | New York |
| Stably Corporation | |
| Stack AI | |