| Company | Timeline | Status | |
| Skate Buddies UK Cic Director • Unreported | 10 May 2024←1 Year 6 Months→Current | Active | |
| Edgbaston Reservoir Co Limited Director • Unreported | 8 Feb 2021←4 Years→Current | Active | |
| Misfits Music Ltd Director • Unreported | 6 Feb 2020←5 Years→Current | Active | |
| Bertz Associates Ltd Director • Unreported | 30 Jan 2020←5 Years→Current | Active | |
| Still Walking Cic Director • None | 2 Feb 2015←4 Years→31 Dec 2019 | Active | |
| Midland Actors Theatre Director • Self Employed | 27 Nov 2013←4 Years→22 Dec 2017 | Active | |
| Iris Bertz Limited Director • Unreported | 19 Jan 2004←21 Years→Current | Active | |
