| Company | Timeline | Status | |
| JHK RGRI Ltd Director • Director | 29 Apr 2025←6 Months→Current | Active | |
| John H King Holding Co Ltd Director • Director | 29 Apr 2025←6 Months→Current | Active | |
| JHK Npi Ltd Director • Director | 25 Jan 2022←3 Years→Current | Active | |
| JHK Devonshire Ltd Director • Chartered Surveyor | 11 Apr 2016←9 Years→Current | Active | |
| Brixton Estates Limited Director • Chartered Surveyor | 27 Jan 2016←9 Years→22 Aug 2025 | Dissolved | |
