−£887k
−2469%vs Mar 2025Active09462917Private limited companyWitney
SEROX LIMITED
Significant control: G.B. Trustees Limited (50–75%)
From public filings as at 31 Aug 2026; may contain errors or be out of date.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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What does Serox Limited 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.
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01
Summary
SEROX LIMITED is an active private limited company (company number 09462917) incorporated on 27 February 2015, registered in Witney. Its registered activity is research and experimental development on biotechnology (SIC 72110). Latest small accounts cover the period ending 31 March 2026, showing net assets of −£887k and cash of £62k, with 14 employees on average. Net assets fell 2469% on the prior period (£37k).
Peer position · net assets
By net assets it sits in the bottom quarter of 152 comparable companies in Oxford (median £10k, upper quartile £474k).
02
Ownership and control
- G.B. Trustees Limited
- owns 50–75% of shares
- holds 50–75% of voting rights
- has significant influence or control
- Cecilia Muldoon
- owns 25–50% of shares
- holds 25–50% of voting rights
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 February 201511 yrs ago
- Next accounts due
- 31 December 2027in 434 days
- Confirmation statement due
- 13 March 2027in 141 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
- MicroCompanies Act thresholds
05
Financials
£62k
−62%vs Mar 2025Not reported
14
No changevs Mar 2025| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 March 2026 | −£887k | £62k | £55k | — | — | — | 14 |
| 31 March 2025 | £37k | £164k | £91k | — | — | — | 14 |
Cash per employee£4,403Cash ÷ 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 below zeroNet assets £-886,920 at 31 March 2026
- Net assets down 25% or more on the prior period-2468.7% vs prior period
- Cash at bank of £50,000 or moreCash £61,640
- Incorporated five or more years agoIncorporated 27 February 2015
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 434 days
- Confirmation statement duein 141 days
- Accounts period endNet liabilities £887k · small accounts
- Accounts period endNet assets £37k · small accounts
- Incorporated
08
Similar companies in Oxford
- MOLECULAR WAREHOUSE LTD.Oxford · inc. Mar 2015
- PETER KNAPP QA LIMITEDWheatley · inc. Feb 2015
- REPLIMUNE LIMITEDAbingdon · inc. Mar 2015
- ARCTURIS DATA HOLDINGS LIMITEDKidlington · inc. Feb 2015
- BIOME OXFORD LIMITEDThame · inc. Apr 2015
- GLIOTHERAPY LIMITEDOxford · inc. May 2015
All companies incorporated on 27 February 2015 · in Feb 2015.
09
Reminders for SEROX LIMITED
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.