| Summit Healthcare Services | Massachusetts |
| Summit Information Solutions, Inc. | Virginia |
| Summit IT Solutions, Inc. | |
| Summit Partners | Massachusetts |
| Summit Software Company | New York |
| Summit Source | Indiana |
| Summit Space Corporation | |
| Summit Systems, Inc. | Missouri |
| Summit Technologies | Connecticut |
| Summit Technology Group | |
| Summit Therapeutics, Inc. | |
| Summit Web Design | Virginia |
| SummitIG, LLC | Virginia |
| Summitsoft | Nebraska |
| Summus Global, Inc. | |
| Sumo Logic | California |
| Sumo Scheduler | Georgia |
| SumoDrive, LLC | |
| SumTotal | California |
| SUMURI | |
| Sun Bear Software, Inc. | Massachusetts |
| Sun Capital Partners, Inc. | Florida |
| Sun Diagnostics, LLC | Maine |
| Sun Electronics | Florida |
| Sun Graphic | Washington |
| Sun Ridge Systems, Inc. | California |
| Sun Valley Research Center, Inc. | |
| Sunai | |
| Sunant Interactive | Wisconsin |
| Sunbelt Computer Systems, Inc. | Texas |
| Sunbelt Rentals, Inc. | |
| Sunbird Bio | Massachusetts |
| Sunbit Now, LLC | California |
| Sunbound | District of Columbia |
| Sunbridge Institute | New York |
| Sunburst Digital | Illinois |
| Sunburst Electronics, Inc. | Pennsylvania |
| Sunburst Software Solutions, Inc. | Vermont |
| Sunburst Web Services | Texas |
| Suncoast Broadband | Maryland |
| Suncoast Computing | Florida |
| Suncoast Website Design | |
| Sund and Company | Ohio |
| Sundance International, LLC | Illinois |
| Sundance Networks, Inc. | Pennsylvania |
| Sundance Systems, Inc. | Ohio |
| Sunday communications, Inc. | Georgia |
| Sunday Software, Inc. | Florida |
| SundaySky | |
| Sundial Software Corporation | |