£1.36m
vs Jun 2024Active13568883Private limited companyLondon
CONCERT BIO LTD
Significant control: Paul Johan Rutten (75–100%)
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
Watch this company
Get an email when Companies House records a change for Concert Bio Ltd: status, filings, accounts, officers or owners. Free.
Not live yet: alerts start by 15 December 2026. We store your email and this company number only, for these alerts. If alerts don’t launch, we tell you and delete your address. Privacy
Coming soon · product and service lists
What does Concert Bio Ltd sell?
Registered activity: Research and experimental development on biotechnology (SIC 72110). We’re building product and service lists for UK companies. Get this one when it’s ready.
One email, only about this. If we don’t launch within 60 days we’ll tell you. Privacy
01
Summary
CONCERT BIO LTD is an active private limited company (company number 13568883) incorporated on 16 August 2021, registered in London. Its registered activity is research and experimental development on biotechnology (SIC 72110). Latest small accounts cover the period ending 30 June 2025, showing net assets of £1.36m, with 11 employees on average. Net assets rose 210% on the prior period (−£1.23m).
Peer position · net assets
By net assets it sits in the top quarter of 603 comparable companies in London (median £440, upper quartile £92k).
02
Ownership and control
- Mr Paul Johan Rutten
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents. Directors and secretaries: see the officers list at Companies House.
03
Key dates
- Incorporated
- 16 August 20215 yrs ago
- Next accounts due
- 30 March 2027in 155 days
- Confirmation statement due
- 30 August 2027in 308 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 72110
- Research and experimental development on biotechnology
- Accounts type
- Total Exemption Full
- Size band
- SmallCompanies Act thresholds
05
Financials
Not reported
Not reported
11
+10%vs Jun 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 30 June 2025 | £1.36m | — | — | £93k | — | — | 11 |
| 30 June 2024 | −£1.23m | — | — | £42k | — | — | 10 |
Current ratio4.71Current assets ÷ creditors within one year
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
06
Filing and accounts signals
- Net assets above zeroNet assets £1,357,665 at 30 June 2025
- Net assets up 10% or more on the prior period+209.9% vs prior period
- Current assets at least 1.5× creditors within one yearCurrent ratio 4.71
- Incorporated five or more years agoIncorporated 16 August 2021
Neutral facts read from the register and filed accounts, each with its evidence. They are not a rating, a prediction or advice, and may be incomplete or out of date. How each signal is derived.
07
Timeline
- Confirmation statement duein 308 days
- Next accounts duein 155 days
- Accounts period endNet assets £1.36m · small accounts
- Accounts period endNet liabilities £1.23m · small accounts
- Incorporated
08
Similar companies in London
- NWPHARMATECH LTDLondon · inc. Aug 2021
- VECTOR BIOSCIENCE CAMBRIDGE LTDLondon · inc. Aug 2021
- TWIST BIOSCIENCE UK LTDLondon · inc. Aug 2021
- PROPRIA NANORX LIMITEDLondon · inc. Aug 2021
- KORA BIOWORKS LTDLondon · inc. Aug 2021
- PROMATIX BIOSCIENCES LTDLondon · inc. Aug 2021
All companies incorporated on 16 August 2021 · in Aug 2021.
09
Reminders for CONCERT BIO LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.