| Company | Timeline | Status | |
| Maritime International Secretariat Services Limited Director • Company Director | 27 Jun 2023←1 Year 11 Months→12 Jun 2025 | Active | |
| International Chamber Of Shipping Limited Director • Chairman | 22 Jun 2022←3 Years→Current | Active | |
| Sussex Shipping Limited Director • Chartered Accountant | 8 Mar 2019←19 Days→27 Mar 2019 | Active | |
| The Chamber Of Shipping Limited Director • Chartered Accountant | 15 Mar 2018←5 Years→14 Feb 2024 | Active | |
| The British Shipping Federation Limited Director • Chartered Accountant | 15 Mar 2018←5 Years→14 Feb 2024 | Active | |
| Denholm Industrial Group Limited Director • Director | 19 Apr 2016←4 Years→25 Nov 2020 | Active | |
| Denholm Logistics Group Limited Director • Chartered Accountant | 30 Jul 2015←5 Years→27 Nov 2020 | Active | |
| Denholm Energy Services Limited Director • None | 21 Aug 2014←11 Years→Current | Active | |
| Mountpark Shipping Company Limited Director • Chartered Accountant | 8 Apr 2014←11 Years→Current | Active | |
| Denholm Industrial Services (Holdings) Limited Director • Chartered Accountant | 7 Feb 2014←3 Years→21 Apr 2017 | Dissolved | |
