| Company | Timeline | Status | |
| Holtzbrinck Science & Technology Limited Director • Company Director  | 25 May 2020←1 Year 4 Months→11 Oct 2021  | Active  | |
HMT No. 2 Limited Director • Company Director  | 5 Aug 2015←10 Months→28 Jun 2016  | Dissolved  | |
HMT No. 1 Limited Director • Company Director  | 5 Aug 2015←10 Months→28 Jun 2016  | Dissolved  | |
| Holtzbrinck Publishing Investments Limited Director • Company Director  | 14 Apr 2015←6 Years→11 Oct 2021  | Active  | |
| Holtzbrinck Investment Limited Director • Company Director  | 14 Apr 2015←6 Years→11 Oct 2021  | Active  | |
CRW Publishing Limited Director • Company Director  | 27 Feb 2015←2 Years 2 Months→23 May 2017  | Dissolved  | |
Macmillan Distribution Limited Director • Company Director  | 28 Mar 2014←3 Years→28 Nov 2017  | Dissolved  | |
| Euphyia Limited Director • Director  | 17 May 2004←18 Years→17 Jan 2023  | Dissolved  | |
| Euphyia Limited Secretary • Unreported  | 17 May 2004←6 Years→1 Sep 2010  | Dissolved  | |
Antsa Limited Director • Director  | 4 Sep 2003←15 Years→11 Sep 2018  | Dissolved  | |
