| Simmo Limited | Private company limited by shares | Dissolved |
| SIMMO COMPANY LIMITED | Private company limited by shares | Live |
| SIMMON LIMITED | Private company limited by shares | Dissolved |
| SIMMON ENTERPRISE CO., LIMITED | Private company limited by shares | Dissolved |
| DICKSON SIMMONDS EMPLOYMENT AGENCY LIMITED | Private company limited by shares | Dissolved |
| LUCY SIMMONDS FINE PAINTINGS LIMITED | Private company limited by shares | Dissolved |
| Simmons & Simmons Limited | Private company limited by shares | Live |
| America Simmons Limited | Private company limited by shares | Live |
| SIMMONS ASIA LIMITED | Private company limited by shares | Dissolved |
| GRANT, SIMMONS & COMPANY LIMITED | Private company limited by shares | Dissolved |
| Simmons Mattress Group Limited | | Live |
| SIMMONS ENGINEERED PRODUCTS LIMITED | Private company limited by shares | Live Commenced dormancy on 12-Sep-2013 |
| USA SIMMONS SHARE LIMITED | | Live |
| SIMMONS FURNITURE TECHNOLOGY LIMITED | | Live |
| THOS. W. SIMMONS & COMPANY, LIMITED | Private company limited by shares | Dissolved |