| Company | Timeline | Status | |
John H Whitaker (Liberia) Limited Director • Director And Chartered Accountant | 12 Sep 2014←3 Years→2 Jan 2018 | Dissolved | |
| Crown Crewing (UK) Limited Director • Director And Chartered Accountant | 18 Oct 2013←6 Years→31 Aug 2020 | Dissolved | |
Whitcrew Management (UK) Limited Director • Financial Director | 17 Apr 1998←17 Years→23 Feb 2016 | Dissolved | |
John Harker,Limited Director • Financial Director | 10 Jul 1991←29 Years→13 Oct 2020 | Dissolved | |
| John H. Whitaker (Management) Limited Director • Financial Director | 10 Jul 1991←29 Years→31 Aug 2020 | Active | |
| John H.Whitaker (Tankers) Limited Director • Financial Director | 10 Jul 1991←29 Years→31 Aug 2020 | Active | |
| John H. Whitaker (Holdings) Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Liquidation | |
