| Company | Timeline | Status | |
| Variety Events Limited Director • Optometrist | 1 Jan 2008←1 Year 2 Months→3 Mar 2009 | Active | |
| Stewart R. Greenberg City Opticians Limited Director • Optician | 20 Dec 1991←33 Years→19 Aug 2025 | Dissolved | |
| Stewart R. Greenberg Opticians Limited Director • Optician | 20 Dec 1991←33 Years→Current | Active | |
