£397k
+4%vs Dec 2024Active05271161Private limited companyOxon
SYNTH-ISIS LTD
Significant control: Virginia Mary Madeley (25–50%), John Paul Madeley (25–50%)
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
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Registered activity: Other research and experimental development on natural sciences and engineering (SIC 72190). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
SYNTH-ISIS LTD is an active private limited company (company number 05271161) incorporated on 27 October 2004, registered in Oxon. Its registered activity is other research and experimental development on natural sciences and engineering (SIC 72190). Latest small accounts cover the period ending 31 December 2025, showing net assets of £397k and cash of £21k, with 1 employee on average. Net assets rose 4% on the prior period (£382k).
Peer position · net assets
By net assets it sits in the top quarter of 124 comparable companies in Oxford (median £954, upper quartile £58k).
02
Ownership and control
- Mrs Virginia Mary Madeley
- owns 25–50% of shares
- Dr John Paul Madeley
- owns 25–50% of shares
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
- 27 October 200421 yrs ago
- Next accounts due
- 30 September 2027in 342 days
- Confirmation statement due
- 10 November 2026in 18 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 72190
- Other research and experimental development on natural sciences and engineering
- Accounts type
- Total Exemption Full
- Size band
- MicroCompanies Act thresholds
05
Financials
£21k
−21%vs Dec 2024Not reported
1
−50%vs Dec 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 December 2025 | £397k | £21k | £25k | £37k | — | — | 1 |
| 31 December 2024 | £382k | £27k | £372k | £41k | — | — | 2 |
Current ratio1.61Current assets ÷ creditors within one year
Cash per employee£21kCash ÷ average employees
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 £397,431 at 31 December 2025
- Current assets at least 1.5× creditors within one yearCurrent ratio 1.61
- Incorporated five or more years agoIncorporated 27 October 2004
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
- Next accounts duein 342 days
- Confirmation statement duein 18 days
- Accounts period endNet assets £397k · small accounts
- Accounts period endNet assets £382k · small accounts
- Incorporated
08
Similar companies in Oxford
- P1VITAL LIMITEDWallingford · inc. Oct 2004
- VELOCYS TECHNOLOGIES LIMITEDOxford · inc. Oct 2004
- SALUNDA LIMITEDBicester · inc. Sept 2004
- PHYNOVA GROUP LIMITEDBanbury · inc. Aug 2004
- OXFORD NANOPORE TECHNOLOGIES PLCOxford · inc. Mar 2005
- SYSTEMS BIOLOGY LABORATORY UK C.I.CAbingdon · inc. May 2004
All companies incorporated on 27 October 2004 · in Oct 2004.
09
Reminders for SYNTH-ISIS LTD
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.