QBYSS LTD
Company number 11963576 · Active · London WC2B 5AH
QBYSS LTD is an active private limited company (company number 11963576) incorporated on 25 April 2019, registered in London. Its registered activity is other research and experimental development on natural sciences and engineering (SIC 72190). Latest small accounts cover the period ending 30 September 2025, showing net assets of −£4.77m and cash of £402k, with 18 employees on average. Net assets fell 214% on the prior period (−£1.52m).
By net assets it sits in the bottom quarter of 654 comparable companies in London (median £101, upper quartile £41k).
Key dates
- Incorporated
- 25 April 2019
- Next accounts due
- 30 June 2027 — in 251 days
- Confirmation statement due
- 9 May 2027 — in 199 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
Activity
- SIC 72190
- Other research and experimental development on natural sciences and engineering
- Accounts type
- Small
- Size band
- Micro (Companies Act thresholds)
Financials — 2 periods on record, latest ending 30 September 2025
| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 30 September 2025 | −£4.77m | £402k | — | £3.12m | — | — | 18 |
| 30 September 2024 | −£1.52m | £419k | — | £2.58m | — | — | 12 |
- Current ratio
- 0.28 — current liabilities exceed current assets
- Cash per employee
- £22k
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
Firmoscan score: 31/100 (grade E)
- -15 Negative net assets — Net assets £-4,774,461 at 2025-09-30
- -8 Net assets falling — -213.6% vs prior period
- -8 Current liabilities exceed current assets — Current ratio 0.28
- +4 Cash reserves — Cash £401,935
- +8 Established — Incorporated 2019-04-25 (7 years)
A transparent, rules-based score from filed data only: every point lists its evidence. It is not a credit rating or advice.
Ownership and control
- Mr Lee Harrison — owns 25–50% of shares; holds 25–50% of voting rights · since 17 February 2020
- Mr Sebastian Kulczyk — owns 50–75% of shares; holds 50–75% of voting rights · since 28 October 2021
- Mr Vanja Baros — owns 25–50% of shares; holds 25–50% of voting rights; can appoint or remove directors · since 25 April 2019 · ceased 17 February 2020
- Mr James Ronald Hersov — owns 25–50% of shares; holds 25–50% of voting rights; can appoint or remove directors · since 25 April 2019 · ceased 17 February 2020
- Mr Sebastian Kulczyk — owns 25–50% of shares; holds 25–50% of voting rights · since 28 October 2021 · ceased 7 November 2023
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents.
Similar companies in London
Same activity (other research and experimental development on natural sciences and engineering), closest in incorporation date.
- MATERIAL CULTURES LTD — London, inc. Apr 2019
- AIV LTD — London, inc. Apr 2019
- BREATHE BATTERY TECHNOLOGIES LIMITED — London, inc. May 2019
- COOL PLANET TECHNOLOGIES LIMITED — London, inc. May 2019
- DEBYE LTD — London, inc. Mar 2019
- VERINAG LIMITED — London, inc. Mar 2019
All companies incorporated on 25 April 2019 · in Apr 2019.
Reminders for QBYSS LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.