| D&J TIMBER DESIGN LIMITED | Private company limited by shares | Dissolved |
| TIME DESIGN LIMITED | Private company limited by shares | Dissolved |
| Time and Company Design Limited | Private company limited by shares | Live |
| BM Time Design Limited | | Live |
| TimeLess Design Limited | Private company limited by shares | Live |
| Timeless Event Design Limited | Private company limited by shares | Live |
| TIMES DESIGN LIMITED | Private company limited by shares | Live |
| Tinson Design Limited | | Live |
| TinYin Design Limited | Private company limited by shares | Live |
| TITA DESIGN CO. LIMITED | Private company limited by shares | Dissolved |
| T-Mamba Design Limited | | Live |
| Toby Ng Design Limited | Private company limited by shares | Live |
| TOMMYDADDY DESIGN LIMITED | Private company limited by shares | Live |
| Tomorrow's Design Limited | Private company limited by shares | Live |
| TOMSENGA DESIGN LIMITED | Private company limited by shares | Live |
| TONTINI DESIGN LIMITED | Private company limited by shares | Live |
| TOPLAN DESIGN AND CONTRACTING LIMITED | Private company limited by shares | Dissolved |
| TOPLINE DESIGN LIMITED | Private company limited by shares | Dissolved |
| Topzone Design Limited | Private company limited by shares | Live |
| TOTEM DESIGN & GRAPHICS LIMITED | Private company limited by shares | Live |
| TOURS DESIGN LIMITED | Private company limited by shares | Dissolved |
| TOUT ENSEMBLE DESIGN HOUSE LIMITED | Private company limited by shares | Live |
| TOYOTA DESIGN (JAPAN) LIMITED | Private company limited by shares | Dissolved |
| Toys Design Limited | Private company limited by shares | Live |
| DESIGN TRADE LIMITED | Private company limited by shares | Dissolved |
| FM DESIGN & TRADE COMPANY LIMITED | Private company limited by shares | Dissolved |
| DREAM DESIGN AND TRADING COMPANY LIMITED | Private company limited by shares | Live |
| Ever Grow Design and Trading Company Limited | Private company limited by shares | Dissolved |
| Legendary Trading And Design Company Limited | | Live |
| EVER YOUNG SQUARE DESIGN AND TRADING LIMITED | Private company limited by shares | Live |
| AL TRANSFO DESIGN GROUP LIMITED | Private company limited by shares | Live |
| Transform Design Limited | | Live |
| TRANSFORMER TECHNOLOGY DESIGN LIMITED | | Live |
| TRANSFRONT DESIGN CO. LIMITED | Private company limited by shares | Dissolved |
| Sky Tree Design Limited | Private company limited by shares | Live |
| TREE DESIGN LIMITED | | Live |
| TRENDMALL DESIGN LIMITED | Private company limited by shares | Live |
| Trimension Design Limited | | Live |
| Trinity Design Limited | Private company limited by shares | Live |
| Tri-novation Design & Innovation Limited | Private company limited by shares | Dissolved |
| Les Trios Design Limited | Private company limited by shares | Dissolved |
| TRIPLE MARK DESIGN LIMITED | Private company limited by shares | Live |
| Trissia Design Limited | Private company limited by shares | Live |
| TROCHILUS DESIGN LIMITED | Private company limited by shares | Live Commenced dormancy on 03-Jan-2014 |
| TROIKA DESIGN LIMITED | Private company limited by shares | Live |
| TROIS MODE DESIGN COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRUE . DESIGN LIMITED | Private company limited by shares | Dissolved |
| TRUE DESIGN PLUS LIMITED | Private company limited by shares | Dissolved |
| TRUNVEX DESIGN COMPANY LIMITED | Private company limited by shares | Live |
| TRUYTS DUTCH DESIGN LIMITED | Private company limited by shares | Live |
| T.S. DESIGN LIMITED | Private company limited by shares | Live |
| HERRICK TSANG DESIGN LIMITED | Private company limited by shares | Live |
| TSBE DESIGN CONSULTANT LIMITED | Private company limited by shares | Live |
| TUART LANDSCAPE DESIGN COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNG MEI DESIGN CO. LIMITED | Private company limited by shares | Live |
| TUNG TAI DESIGN COMPANY LIMITED | Private company limited by shares | Live |
| TUNG CHUNG DESIGN COMPANY LIMITED | Private company limited by shares | Live |
| TUNG FAI DESIGN & CONSULTANCY LIMITED | Private company limited by shares | Live |
| Yee Tung Design & Contracting Limited | | Live |
| TUNG MEI DESIGN (H.K.) HOLDING CO. LIMITED | Private company limited by shares | Live |
| TAI TUNG MACHINERY DESIGN COMPANY LIMITED | Private company limited by shares | Dissolved |
| Turnmile Design Limited | Private company limited by shares | Live |
| TWINCEITY DESIGN LIMITED | Private company limited by shares | Live |
| TWINKLE DESIGN COMPANY LIMITED | Private company limited by shares | Dissolved |
| TWINKLE DESIGN LIMITED | Private company limited by shares | Dissolved |
| TWINS DESIGN COMPANY LIMITED | Private company limited by shares | Live |
| T-WOOD FURNITURE DESIGN LIMITED | Private company limited by shares | Live |
| T.Y. DESIGN COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHINA TYGF DESIGN CO., LIMITED | Private company limited by shares | Dissolved |
| TYPE ONE DESIGN LIMITED | Private company limited by shares | Live |
| Ultimate Design HK Limited | Private company limited by shares | Live Commenced dormancy on 23-Dec-2015 |
| ULTIMATE DESIGN LIMITED | Private company limited by shares | Live |
| Ultimate Display Design Limited | Private company limited by shares | Live |
| ULTIMATE FRAGRANCE DESIGN LIMITED | Private company limited by shares | Live |
| ULTRATECH MOLD DESIGN & MFG. CO. LIMITED | Private company limited by shares | Live |
| UMBRELLA DESIGN CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNDERWOOD DESIGN LIMITED | Private company limited by shares | Dissolved |
| UNDERWOOD DESIGN STUDIO LIMITED | Private company limited by shares | Live |
| UNI-ASIA DESIGN LIMITED | Private company limited by shares | Live |
| UNICUT DESIGN LIMITED | Private company limited by shares | Live |
| UniOne Design International Limited | Private company limited by shares | Live |
| Unique Aqua Design Company Limited | Private company limited by shares | Live |
| UNISIA ADVERTISING AND DESIGN COMPANY LIMITED | Private company limited by shares | Dissolved |
| THE UNIT DESIGN LIMITED | | Live |
| DESIGN RESEARCH UNIT HK LIMITED | Private company limited by shares | Dissolved |
| XPERIMENTAL DESIGN UNIT LIMITED | Private company limited by shares | Dissolved |
| JD UNITE DESIGN LIMITED | Private company limited by shares | Live |
| Unite Creative Design Co. Limited | Private company limited by shares | Live |
| UNITED POWER FASHION DESIGN LIMITED | Private company limited by shares | Live |
| HK UNIVERSAL SUPER TRAVEL DESIGN EXECUTE LIMITED | Private company limited by shares | Live |
| UNIVERSAL LIGHTING DESIGN LIMITED | Private company limited by shares | Live Ceased dormancy on 14-Oct-2011 |
| (UN)KNOW DESIGN LIMITED | Private company limited by shares | Dissolved |
| UNLIMITED DESIGN LIMITED | Private company limited by shares | Live |
| UNOLAI DESIGN GROUP (ASIA) COMPANY LIMITED | Private company limited by shares | Live |
| Up&up design Limited | | Live |
| Uranus Design Limited | | Live |
| HK BEST URBAN&ARCHITECTURE DESIGN LIMITED | Private company limited by shares | Dissolved |
| Urbanite Design Limited | Private company limited by shares | Live |
| USELESS SPACE DESIGN LIMITED | Private company limited by shares | Live |
| USSO DESIGN LIMITED | Private company limited by shares | Dissolved |