# Black Box Advisory Ltd

## Details

- **Company number:** [11998436](https://find-and-update.company-information.service.gov.uk/company/11998436)
- **Status:** Active
- **Type:** Private Limited Company
- **Incorporated:** 15 May 2019
- **Registered office:** 19 OTHER STREET, YNYSYBWL, PONTYPRIDD, CF37 3LN
- **Nature of business:** [69201](/sic/69201) Accounting and auditing activities, [70221](/sic/70221) Financial management, [70229](/sic/70229) Management consultancy activities other than financial management


## Previous names

- Olympus Accountancy Ltd (until 20 Nov 2025)




## Control

| Name | Nature of control | Notified | Ceased |
|---|---|---|---|
| Birkenhaus Group Limited | ownership-of-shares-25-to-50-percent, voting-rights-25-to-50-percent | 15 May 2019 | 22 May 2020 |
| Plutus Consultancy Ltd | ownership-of-shares-75-to-100-percent, voting-rights-25-to-50-percent | 15 May 2019 | 18 Dec 2022 |
| Mr Lee Williams | ownership-of-shares-75-to-100-percent | 18 Dec 2022 |  |



## Accounts

| Year ended | Employees |
|---|---|
| 31 May 2026 | 2 |
| 31 May 2025 | 2 |
| 31 May 2024 | 2 |
| 31 May 2023 | 1 |
| 31 May 2022 | 0 |
| 31 May 2021 | 0 |
| 31 May 2020 | 2 |