| Othaniel International Holding Limited | Private company limited by shares | Live |
| Othaniel International Holding Limited | Private company limited by shares | Live |
| OTHE Workshop Limited | Private company limited by shares | Live |
| OTHEDO LIMITED | Private company limited by shares | Dissolved |
| OTHELLO LIMITED | Private company limited by shares | Dissolved |
| OTHER ONE LIMITED | Private company limited by shares | Dissolved |
| OTHER CHART CO., LIMITED | | Live |
| OTHER ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OTHER EVENT COMPANY LIMITED -THE- | Private company limited by shares | Live |
| OTHER INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Other Leaf Limited -The- | Private company limited by shares | Live |
| Other Projects Limited | Private company limited by shares | Live |
| THE OTHER SIDE HK LIMITED | | Live |
| Other Way Sports Limited | Private company limited by shares | Live |
| Think Other Company Limited | Private company limited by shares | Live |
| IN OTHER WORDS LIMITED | Private company limited by shares | Live |
| Otherhalf Limited | | Live |
| DESIGN OTHERING COMPANY LIMITED | Private company limited by shares | Live |
| OtherKomster Limited | Private company limited by shares | Live |
| OtherLand Limited | Private company limited by shares | Live |
| OTHER-WAY ENTERPRISES LIMITED | Private company limited by shares | Live |
| Otherwhere Studio Limited | Private company limited by shares | Live |
| OTHERWISE COMPANY LIMITED | | Live |
| OtherWorld Limited | Private company limited by shares | Live |
| OTHM Global Limited | | Live |
| OTHNIEL LIMITED | Private company limited by shares | Dissolved |
| OTHNIEL INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live |
| Othos Virtual Solutions Limited | Private company limited by shares | Live |
| U.S.A OTHSUN GROUP (HONGKONG) LIMITED | Private company limited by shares | Live |
| OTHUA LIMITED | Private company limited by shares | Live |
| OTIC LIMITED | Private company limited by shares | Live |
| OTIC HEARING & SPEECH SERVICE CENTRE (CENTRAL) LIMITED | Private company limited by shares | Dissolved |
| OTIC HEARING & SPEECH SERVICE CENTRE LIMITED | Private company limited by shares | Live |
| OTIC DIGITECH LIMITED | Private company limited by shares | Live |
| OTIC FOUNDATION LIMITED | Company limited by guarantee | Live |
| OTIC HONG KONG COMPANY LIMITED | Private company limited by shares | Live |
| OTIC MEDIA LIMITED | Private company limited by shares | Live |
| OTIC TECH TIME CO. LIMITED | Private company limited by shares | Live Commenced dormancy on 03-Sep-2013 |
| OTIC TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live Commenced dormancy on 03-Sep-2013 |
| OTICO LIMITED | Private company limited by shares | Dissolved |
| OTIHK LIMITED | | Live |
| OTILE.COM LIMITED | Private company limited by shares | Live |
| OTIME INTERNATIONAL CO., LIMITED | | Live |
| OTIME Technology Co., Limited | | Live |
| Otincle Company Limited | Private company limited by shares | Live |
| Otinifni Limited | Private company limited by shares | Live |
| HONGKONG OTINWELL GROUP LIMITED | Private company limited by shares | Live |
| OTION COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTION (CIAO WEATHER) FURNITURE CO., LIMITED | Private company limited by shares | Live |
| OTIRA LIMITED | Private company limited by shares | Dissolved |
| OTIRA TRADING CO. LIMITED | Private company limited by shares | Dissolved |
| OTIS COMPANY LIMITED | Private company limited by shares | Live |
| AMERICAN OTIS INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OTIS AND ASSOCIATES (H.K.) LIMITED | Private company limited by shares | Dissolved |
| OTIS E&M CHINA LIMITED | Private company limited by shares | Live |
| OTIS ELEVATOR (CHINA) GROUP LIMITED | Private company limited by shares | Dissolved |
| OTIS ELEVATOR COMPANY (H.K.) LIMITED | Private company limited by shares | Live |
| OTIS ENGINEERING AND TRADE LIMITED | Private company limited by shares | Live |
| Otis China Export Company Limited | Private company limited by shares | Dissolved |
| OTIS GROUP COMPANY LIMITED | Private company limited by shares | Live |
| USA SPEEDINESS OTIS ELEVATOR GROUP LIMITED | Private company limited by shares | Live |
| OTIS MANN INTERNATIONAL (HONG KONG) CO. LIMITED | Private company limited by shares | Live |
| OTIS PRECISION HONG KONG LIMITED | Private company limited by shares | Live |
| Otis Tarda Limited | Private company limited by shares | Live |
| OTIS TRADE LIMITED | Private company limited by shares | Live |
| Otis Trading company Limited | Private company limited by shares | Live |
| XIAMEN OTISKY ENTERPRISE LIMITED | Private company limited by shares | Live |
| OTISTAR ENTERPRISE LIMITED | Private company limited by shares | Live |
| OTISWEAR CO. LIMITED | Private company limited by shares | Dissolved |
| OTIUM LIMITED | Private company limited by shares | Dissolved |
| OTIUM LIMITED | Private company limited by shares | Live |
| OTIUM CAPITAL LIMITED | Private company limited by shares | Live |
| OTIUM COACH (HK) COMPANY LIMITED | Private company limited by shares | Live |
| OTIUM FURNISHINGS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Otium Interiors Limited | Private company limited by shares | Live |
| Otium Journeys Limited | Private company limited by shares | Live |
| Otium Pacific Limited | Private company limited by shares | Live |
| OTIUM TRAVEL LIMITED | | Live |
| Otivio Hong Kong Limited | Private company limited by shares | Live |
| OTIX Company Limited | Private company limited by shares | Live |
| Otiz Limited | Private company limited by shares | Live |
| OTKS Limited | Private company limited by shares | Live |
| ITALY OTLESS FINERY (HK) INT'L LIMITED | Private company limited by shares | Live |
| OTLEY COMPANY LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI OTOCASTLE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| OTOCKY HOLIDAYS LIMITED | Private company limited by shares | Dissolved |
| Hermosa Otok Limited | Private company limited by shares | Dissolved |
| OTOKAMI Limited | Private company limited by shares | Live |
| OTOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| Otomo Holding Limited | Private company limited by shares | Live |
| OTOMO TRANSPORT SYSTEM (HONG KONG) LIMITED | Private company limited by shares | Live |
| HK OTOMO INDUSTRY LIMITED | | Live |
| OTOMO TRADE LIMITED | Private company limited by shares | Live |
| GLORY OTONE TRADE LIMITED | | Live |
| FRANCE OTONEW COSMETICS GROUP COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTONI LIMITED | Private company limited by shares | Dissolved |
| OtoNo Limited | | Live |
| OTONS INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| OTONTREND GROUP LIMITED | Private company limited by shares | Live |
| OTOO LIMITED | Private company limited by shares | Dissolved |