| ELCO LIMITED | Private company limited by shares | Live |
| ELCO INC LIMITED | Private company limited by shares | Live |
| ELCO ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ELCODA LIMITED | Private company limited by shares | Dissolved |
| Elcodex Limited | Private company limited by shares | Live |
| ELCODIS COMPANY LIMITED | Private company limited by shares | Dissolved |
| ELCOM LIMITED | Private company limited by shares | Dissolved |
| ELCOM HK LIMITED | Private company limited by shares | Live |
| ELCOM MANUFACTURING COMPANY, LIMITED | Private company limited by shares | Dissolved |
| ELCOM PRODUCTIONS LIMITED | Private company limited by shares | Live |
| ELCOM TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ELCOME TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| ELCOMETER (HONG KONG) PRINTED DESIGN PACKAGING LIMITED | Private company limited by shares | Live |
| ELCOMMER CO., LIMITED | Private company limited by shares | Live |
| ELCOMP LIMITED | Private company limited by shares | Live |
| ELCOMP TRADE LIMITED | Private company limited by shares | Live |
| ELCOMPONICS SALES CO., LIMITED | Private company limited by shares | Live |
| ELCOMSUP LIMITED | | Live |
| ELCON LIMITED | Private company limited by shares | Dissolved |
| ELCON PRODUCTS DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Shantian Elcon Electronic Company Limited | Private company limited by shares | Live |
| ELCON ELECTRONICS CO. LIMITED | Private company limited by shares | Dissolved |
| ELCON ELECTRONICS TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| ELCON TECHNOLOGIES (H.K.) COMPANY LIMITED | Private company limited by shares | Dissolved |
| ELCON (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| ELCON INDUSTRIAL CO LIMITED | Private company limited by shares | Live |
| ELCON INTERNATIONAL (H.K.) LIMITED | Private company limited by shares | Dissolved |
| ELCON INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ELCON INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ELCON CAPACITOR MANUFACTURING LIMITED | Private company limited by shares | Live |
| Elcon Technology Limited | Private company limited by shares | Live |
| Elcon Worldwide Limited | Private company limited by shares | Live |
| Elcon Worldwide Group Limited | Private company limited by shares | Live |
| ELCONI TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| Hongkong Elconi Industry Co., Limited | Private company limited by shares | Live |
| ELCOTEQ SE LIMITED | Private company limited by shares | Dissolved |
| ELCOTT LIMITED | Private company limited by shares | Dissolved |
| ELCOVIEW LIMITED | Private company limited by shares | Dissolved |