| Company Name | Type | Status |
|---|---|---|
| DOOL CHEMICALS COMPANY LIMITED | Private company limited by shares | Live |
| DO-OL CO., LIMITED | Private company limited by shares | Live |
| DOOLAB LIMITED | Live | |
| DOOLAN LIMITED | Private company limited by shares | Live |
| T.H. DOOLAN (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| DOOLCHEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| FOR DOOLIE LIMITED | Live | |
| DOOLITTLE & ASSOCIATES LIMITED | Private company limited by shares | Dissolved |