Exhibit 21
Subsidiaries of the Registrant
| Entity Name | Organized Under Laws of | |
| Strong Westrex, Inc. | Nebraska | |
| Strong Technical Services, Inc. | Nebraska | |
| Strong/MDI Screen Systems, Inc. | Canada | |
| SDM Holdco, Inc. | Delaware | |
| StrongVest Global Advisors, LLC | Delaware | |
| Digital Ignition, LLC | Georgia |