| Societal CDMO | Georgia |
| Society for Information Management | New Jersey |
| Society for Modeling & Simulation International | California |
| Society Hill Computer Associates | Pennsylvania |
| Society of Cable Telecommunications Engineers Alaska Chapter | Alaska |
| Society of Cable Telecommunications Engineers Buckeye Chapter | Ohio |
| Society of Cable Telecommunications Engineers Cascade Range Chapter | Oregon |
| Society of Cable Telecommunications Engineers Central Florida Chapter | Florida |
| Society of Cable Telecommunications Engineers Gateway Chapter | Missouri |
| Society of Cable Telecommunications Engineers Great Valleys Chapter | Virginia |
| Society of Cable Telecommunications Engineers Greater Chicago Chapter | Illinois |
| Society of Cable Telecommunications Engineers Michiana Chapter | Indiana |
| Society of Cable Telecommunications Engineers Penn-Ohio Chapter | Pennsylvania |
| Society of Cable Telecommunications Engineers Rocky Mountain Chapter | Colorado |
| Society of Cable Telecommunications Engineers San Diego Chapter | California |
| Society of Cable Telecommunications Engineers Sierra Chapter | California |
| Society of Cable Telecommunications Engineers, Inc. | Pennsylvania |
| Society of Communications Technology Consultants International | New York |
| Socius Marketing | |
| Socket | California |
| Socket Supply Co. | New York |
| Socket Telecom, LLC | Missouri |
| SocketLabs, Inc. | Pennsylvania |
| Socleads | |
| Socotra | |
| Socra, Inc. | |
| SOCRadar | |
| Socrates Health Solutions | Texas |
| Socratic | |
| Socratic Technologies | California |
| Socratik | |
| Socrato | Massachusetts |
| SOCS | Ohio |
| Socure | New York |
| Soda & Lime, LLC | |
| SodaPop Media, LLC | Texas |
| Soderman Marketing | Arizona |
| SodiusWillert | Michigan |
| SOF, Inc. | Colorado |
| Sofar Ocean | California |
| Sofasco | Virginia |
| Sofbang, LLC | Illinois |
| Soffront Corporation | California |
| Sofia Dallas SEO | |
| Sofia University | California |
| Sofie | Virginia |
| SOFIHDES | |
| Sofinnova Partners | |
| Sofinnova Ventures, Inc. | California |
| SoFla Web Studio | Florida |