| TIER ONE LIMITED | Private company limited by shares | Dissolved |
| TOP TIER LIMITED | Private company limited by shares | Live |
| Tier One FX Limited | Private company limited by shares | Live |
| Tier Company Limited -The- | Private company limited by shares | Live |
| T.I.E.R Biotech Limited | Private company limited by shares | Live |
| TOP TIER CAPITAL COMPANY LIMITED | Private company limited by shares | Live |
| Next Tier Capital Limited | Private company limited by shares | Live |
| TOP TIER CHEMICALS COMPANY LIMITED | Private company limited by shares | Dissolved |
| TIER ONE TECH HK CO., LIMITED | Private company limited by shares | Live |
| First Tier Tech Co., Limited | Private company limited by shares | Live |
| Grand Tier (USA) Co., Limited | Private company limited by shares | Live |
| Top Tier Education Consultant Limited | | Live |
| Tier ONE Consultants Limited | Private company limited by shares | Live |
| Tier 1 Development Limited | Private company limited by shares | Live |
| TOP TIER EDUCATION LIMITED | Private company limited by shares | Live |
| TIER ONE ENGINEERING LIMITED | Private company limited by shares | Live |
| TIER ONE ENGINEERING SOLUTION LIMITED | Private company limited by shares | Live |
| Top Tier Enterprises Limited | Private company limited by shares | Live |
| First Tier Limited | Private company limited by shares | Live |
| Inno-Revo Next First Tier Limited | | Live |
| Tier 1 Group Company Limited | Private company limited by shares | Live |
| TIER ONE SPORTS GROUP LIMITED | Private company limited by shares | Live |
| TIER Holdings Limited | Private company limited by shares | Live |
| Tier A Holdings Limited | | Live |
| HONG KONG TOP TIER COMPANY LIMITED | Private company limited by shares | Live |
| Tier Import & export Trading Co., Limited | | Live |
| TOP TIER INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| THREE TIER INDUSTRIAL LIMITED | Private company limited by shares | Live |
| TIER ONE INDUSTRIES CO., LIMITED | Private company limited by shares | Live |
| Next Tier Innovations Limited | | Live |
| TOP TIER INTERNATIONAL LIMITED | Private company limited by shares | Live |
| TIER ONE INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| TIER INTERNATIONAL LEASING CO., LIMITED | Private company limited by shares | Live |
| KING TIER LIMITED | Private company limited by shares | Live |
| York Tier Asset Management Limited | Private company limited by shares | Live |
| Top Tier Marketing Limited | | Live |
| Tier One Promotions & Marketing Limited | | Live |
| Sky Tier Corporate Services Limited | Private company limited by shares | Live |
| Sky Tier Secretarial Services Limited | Private company limited by shares | Live |
| Top Tier Technology Limited | Private company limited by shares | Live |
| Three-Party Master (Tier One) Trade Limited | Private company limited by shares | Live |
| Tier One Trading Limited | Private company limited by shares | Live |
| TOP TIER TRADING COMPANY LIMITED | Private company limited by shares | Live |
| Top Tier Travel Entertainment Limited | Private company limited by shares | Live |
| Tier O Wedding Limited | | Live |
| TIER ZERO PRODUCTIONS LIMITED | | Live |
| TIER-1 LIMITED | Private company limited by shares | Live |
| TIER3 INNOVATIONS LIMITED | Private company limited by shares | Dissolved |
| Tierarztin Company Limited | Private company limited by shares | Live |
| Shanghai Tiercel Industry Limited | Private company limited by shares | Live |
| TIERCEL SPORTS COMPANY LIMITED | Private company limited by shares | Live |
| TIERCEL TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TIERDA COMPANY LIMITED | Private company limited by shares | Live |
| TIERNAY TRADING LIMITED | Private company limited by shares | Dissolved |
| TierOnes Limited | Private company limited by shares | Live |
| TIERONG TRADE COMPANY LIMITED | Private company limited by shares | Live |
| DE LA TIERRA LIMITED | | Live |
| TIERRA DIGITAL LIMITED | Private company limited by shares | Live |
| TIERRA ENTERPRISES LIMITED | Private company limited by shares | Live Ceased dormancy on 11-Nov-1997 |
| TIERRA FINANCE LIMITED | Private company limited by shares | Live |
| TIERRA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Tierra Lumi Limited | Private company limited by shares | Live |
| PANEM TIERRA LIMITED | Private company limited by shares | Live |
| TiERRAS LIMITED | Private company limited by shares | Live |
| Top Tiers Limited -The- | Private company limited by shares | Live |