| Company | Timeline | Status | |
| Beacon: For Rare Diseases Ltd Director • Company Director | 11 Oct 2019←6 Years→Current | Active | |
| R Costello Limited Director • Direcrtor | 9 Oct 2018←7 Years→Current | Active | |
| Shellplas Limited Director • Direcrtor | 9 Oct 2018←2 Years 6 Months→20 Apr 2021 | Dissolved | |
| Costello Medical Consulting Limited Director • Pharmaceutical Consultant | 11 Nov 2008←16 Years→Current | Active | |
