| Company | Timeline | Status | |
| Harmon Fabrication Limited Secretary • Unreported | 1 Feb 2007←16 Years→19 Apr 2023 | Active | |
| Harmon Metal Treatments Limited Secretary • Unreported | 5 Nov 2001←21 Years→19 Apr 2023 | Active | |
| Harmon Precision Grinding Limited Secretary • Unreported | 26 Oct 1998←24 Years→19 Apr 2023 | Active | |
| Harmon Group Limited Secretary • Unreported | 26 Oct 1998←24 Years→19 Apr 2023 | Active | |
| Harmon (Form Tools) Limited Secretary • Unreported | 14 Oct 1998←24 Years→19 Apr 2023 | Active | |
