| IRON COP LIMITED | Private company limited by shares | Dissolved |
| Iron Ore Company Limited | Private company limited by shares | Live |
| IRON SEA LIMITED | Private company limited by shares | Live |
| Iron Man Limited | Private company limited by shares | Live |
| IRON LIMITED | Private company limited by shares | Live |
| Iron Cow Company Limited | Private company limited by shares | Live |
| Iron Ion Company Limited | Private company limited by shares | Live |
| Big Iron Limited | | Live |
| Iron Box Limited | | Live |
| Iron Gym Limited | | Live |
| ASIA IRON LIMITED | Private company limited by shares | Live |
| AUS ASIA IRON LIMITED | Private company limited by shares | Live |
| IRON BOND LIMITED | Private company limited by shares | Dissolved |
| WING FUNG ROLLING DOORS & IRON WORKS LIMITED | Private company limited by shares | Live |
| GOLD IRON COMPANY LIMITED | Private company limited by shares | Dissolved |
| Honest Iron Ore Limited | Private company limited by shares | Live |
| LIFTING IRON COMPANY LIMITED | | Live |
| WORLDLY UNWEATHERING IRON MATERIALS COMPANY LIMITED | Private company limited by shares | Dissolved |
| Iron Ocean Limited | Private company limited by shares | Live |
| ASIA PACIFIC IRON ORE LIMITED | Private company limited by shares | Dissolved |
| Iron Rivers Limited | Private company limited by shares | Live |
| IRON ROCK LIMITED | Private company limited by shares | Dissolved |
| SEIT Iron Company Limited | Private company limited by shares | Dissolved |
| IRON & NET SPORTS LIMITED | Private company limited by shares | Dissolved |
| TIANDA IRON ORE LIMITED | Private company limited by shares | Live |
| Zhicheng Iron Limited | Private company limited by shares | Live |
| IRONBASE COMPANY LIMITED | Private company limited by shares | Dissolved |
| IRONBASE ENGINEERING LIMITED | Private company limited by shares | Live |
| IRONBASE ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| SIN LEONG IRONBED & FURNITURE MANUFACTURING CO., LIMITED | Private company limited by shares | Dissolved |
| IronBirch Capital Limited | Private company limited by shares | Live |
| IRONBIRD TRADING COMPANY, LIMITED | Private company limited by shares | Dissolved |
| IronBrand Company Limited | Private company limited by shares | Live |
| IRONBRIDGE LIMITED | Private company limited by shares | Dissolved |
| IRONCASTLE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| IRONCLAD SYSTEM LIMITED | Private company limited by shares | Live |
| IRONCORP COMPANY LIMITED | Private company limited by shares | Dissolved |
| CARIYAN IRONCRAFT MANUFACTURERS LIMITED | Private company limited by shares | Dissolved |
| IRONDALE LIMITED | Private company limited by shares | Dissolved |
| Ironed Co., Limited | | Live |
| IRONEER LIMITED | Private company limited by shares | Live |
| IRONFEET COMPANY LIMITED | Private company limited by shares | Live |
| Ironfield Limited | | Live |
| Ironfish Asia Co., Limited | Private company limited by shares | Live |
| Ironfish International Holdings Pty Limited | Private company limited by shares | Live |
| IRON-FIT INTERNATIONAL TRADE CO., LIMITED | Private company limited by shares | Live |
| Ironfly Technologies Limited | Private company limited by shares | Live |
| IRONFORD COMPANY LIMITED | Private company limited by shares | Live |
| IRONFORGE LIMITED | Private company limited by shares | Live |
| HONG KONG IRON-HAND TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| IRONHORSE INDUSTRIAL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| IRONHOT LIMITED | Private company limited by shares | Live |
| ironic Limited | Private company limited by shares | Live |
| IRONIC ENTERPRISES LIMITED | Private company limited by shares | Live |
| IRONMACE HK Limited | | Live |
| H&F IRONMAN LIMITED | Private company limited by shares | Live |
| IRONMAN AGENCY LIMITED | Private company limited by shares | Dissolved |
| IRONMAN CAPITAL LIMITED | Private company limited by shares | Live |
| IronMan RSV Co., Limited | Private company limited by shares | Live |
| Ironman Marketing Communications Limited | Private company limited by shares | Live |
| IRONMAN CONCEPT LIMITED | Private company limited by shares | Dissolved |
| Ironman Education Consulting Limited | Private company limited by shares | Live |
| IRONMAN CORPORATION LIMITED | Private company limited by shares | Dissolved |
| Ironman Engineering (Hong Kong) Company Limited | | Live |
| ZHEJIANG IRONMAN INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| IRONMAN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| IRONMAN INVESTMENT LIMITED | Private company limited by shares | Live |
| IRONMAN REALTY LIMITED | Private company limited by shares | Dissolved |
| BIG IRONMAN SPORTS CO. LIMITED | Private company limited by shares | Live |
| IRONMAN STATION COMPANY LIMITED | Private company limited by shares | Live |
| IRONMAN TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| IRONMAN TRADING LIMITED | Private company limited by shares | Dissolved |
| Ironmanbaby Technology Co., Limited | | Live |
| IRONMAX COMPANY LIMITED | Private company limited by shares | Dissolved |
| IRONMONGER EVENTS LIMITED | Private company limited by shares | Live |
| HK Ironmongery Limited | Private company limited by shares | Live |
| BONCO IRONMONGERY LIMITED | Private company limited by shares | Live |
| Zoo Architectural Ironmongery Co., Limited | Private company limited by shares | Live |
| PTL Ironmongery Consultancy Limited | | Live |
| CHINA INTERNATIONAL IRONMONGERY ASSOCIATION LIMITED | Private company limited by shares | Live |
| NEUGU IRONMONGERY LIMITED | | Live |
| RONSTAR IRONMONGERY & SECURITY SUPPLIES LIMITED | Private company limited by shares | Live |
| WEBER IRONMONGERY LIMITED | Private company limited by shares | Live |
| IRONNOX - CONSULTING ENGINEERS AND ARCHITECTS LIMITED | Private company limited by shares | Dissolved |
| IRONPEARL LIMITED | Private company limited by shares | Dissolved |
| IRONPOINT COMPANY LIMITED | Private company limited by shares | Dissolved |
| IRONPORT APAC LIMITED | Private company limited by shares | Dissolved |
| IronRoot Limited | | Live |
| KITAK IRONS WORKS COMPANY LIMITED | Private company limited by shares | Live |
| IRONS SPORT LIMITED | Private company limited by shares | Live |
| IRONSHOE LIMITED | Private company limited by shares | Live |
| Ironshore Hong Kong Limited | Private company limited by shares | Live |
| IRONSIDE LIMITED | Private company limited by shares | Dissolved |
| IRONSKY LIMITED | Private company limited by shares | Live |
| SMART IRONSMITH LIMITED | Private company limited by shares | Live |
| Ironsogon Global Limited | Private company limited by shares | Live |
| IRONSTEEL LIMITED | Private company limited by shares | Live |
| Ironstone Industrial Co., Limited | | Live |
| GNG IRONSTONE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| IRONSTONE INVESTMENTS LIMITED | Private company limited by shares | Live |