| Company | Timeline | Status | |
| John H. Whitaker (Management) Limited Director • Director | 11 Mar 2024←1 Year 8 Months→Current | Active | |
| John H.Whitaker (Tankers) Limited Director • Unreported | 11 Mar 2024←1 Year 8 Months→Current | Active | |
| Cantii Aestuarium Holdings Limited Director • Unreported | 13 Dec 2023←1 Year 11 Months→Current | Active | |
| Sea Transportation Limited Director • Bunker Trader | 2 Apr 2012←13 Years→Current | Active | |
