QBYSS LTD
Company details
- Registered name
- QBYSS LTD
- Company number
- 11963576
- Registered office
- 16 GREAT QUEEN STREET, COVENT GARDEN, LONDON, WC2B 5AH, UNITED KINGDOM · 776 other companies at this postcode
- Company type
- Private Limited Company
- Incorporated on
- 25 April 2019
- Status
- Active
- Age
- 7 years
- Previous names
- ENERGY RESEARCH LAB LTD (to 20 Nov 2024) · ADVANCED ENERGY RESEARCH LTD (to 20 Nov 2024)
- Nature of business (SIC)
- 72190 — Other research and experimental development on natural sciences and engineering
- Accounts — next due
- 30 Jun 2027
- Accounts — last made up to
- 30 Sept 2025
- Confirmation statement — next due
- 19 Oct 2026
- Confirmation statement — last
- 05 Oct 2025
What the register says
Facts from the register, with the dates they are filed under. Not a score: what they mean is for you to judge, and every line can be checked against Companies House itself.
- 580 companies are registered at this address — commonly a formation agent or an accountant rather than an office.
- A person with significant control here also controls 3 other companies.
Companies House register snapshot, read 02/09/2026.
People with significant control
Beneficial owners holding over 25% of shares, voting rights or the right to appoint directors
Corporate structure
Who controls this company, and who they control in turn
Connections
Change history
Reconstructed from the dated records Companies House publishes
| Date | Change | Was | Now |
|---|---|---|---|
| 20/11/2024 | Registered name changed | ADVANCED ENERGY RESEARCH LTD | ENERGY RESEARCH LAB LTD |
| 20/11/2024 | Registered name changed | ENERGY RESEARCH LAB LTD | QBYSS LTD |
| 07/11/2023 | Person with significant control ceased | Mr Sebastian Kulczyk | — |
| 28/10/2021 | Person with significant control added | — | Mr Sebastian Kulczyk |
| 28/10/2021 | Person with significant control added | — | Mr Sebastian Kulczyk |
| 17/02/2020 | Person with significant control ceased | Mr Vanja Baros | — |
| 17/02/2020 | Person with significant control ceased | Mr James Ronald Hersov | — |
| 17/02/2020 | Person with significant control added | — | Mr Lee Harrison |
| 25/04/2019 | Person with significant control added | — | Mr Vanja Baros |
| 25/04/2019 | Person with significant control added | — | Mr James Ronald Hersov |
Financial highlights
Parsed from the filed statutory accounts (£ thousands, except employees)
| Metric | FY2025 | FY2024 |
|---|---|---|
| Net assets | -4,774 | -1,522 |
| Employees (avg) | 18 ▲ 50.0% | 12 |
Documents for QBYSS LTD
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The full registration record as held today — name, number, status, registered office, company type, previous names, officers, PSC and SIC codes, timestamped for your file.
Every figure the company’s own accounts state, across each filed period, with year-on-year movement. Most UK companies file small or micro-entity accounts — a balance sheet and a headcount, no turnover or profit.
Who controls the company: persons with significant control, the nature of that control, the ownership graph and every other company those controllers hold.
Data protection register
No entry found on the ICO register of fee payers under this name.
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About QBYSS LTD (11963576)
QBYSS LTD is a private limited company incorporated on 25 April 2019 and registered in the United Kingdom under company number 11963576. Its registered office is at 16 GREAT QUEEN STREET, COVENT GARDEN, LONDON, WC2B 5AH, UNITED KINGDOM. The recorded nature of business is other research and experimental development on natural sciences and engineering (SIC 72190). The company is currently active , with statutory accounts last made up to 30 September 2025. , and the person with significant control is Mr James Ronald Hersov. This profile is provided by opendata.bot by Noetikos, aggregating official data from Companies House bulk data , last refreshed 2 September 2026.
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