| Company | Timeline | Status | |
| Sprecher Grier Halberstam LLP Designated LLP Member • Unreported | 15 May 2025←6 Months→Current | Active | |
| SGH Martineau Company Secretarial LLP Designated LLP Member • Unreported | 15 May 2025←6 Months→Current | Active | |
| SGH Trustees Limited Director • Solicitor | 15 May 2025←6 Months→Current | Active | |
| SGH Company Secretaries Limited Director • Solicitor | 15 May 2025←6 Months→Current | Active | |
| Martineau Secretaries Limited Director • Solicitor | 15 May 2025←6 Months→Current | Active | |
| SGH Trustee Services Limited Director • Solicitor | 15 May 2025←6 Months→Current | Active | |
| Keith Spedding Notary Public Ltd Director • Solicitor And Notary Public | 29 May 2024←1 Year 6 Months→Current | Active | |
| Ampa Trust Corporation Limited Director • Solicitor | 11 Feb 2022←3 Years→Current | Active | |
| Shakespeare Martineau LLP Designated LLP Member • Unreported | 28 Oct 2021←2 Years 6 Months→22 May 2024 | Active | |
| Ampa Holdings LLP Designated LLP Member • Unreported | 1 May 2021←4 Years→Current | Active | |
