COMPLEMENT GENOMICS LIMITED
Company number 03929876 · Active · Durham DH7 0EX
COMPLEMENT GENOMICS LIMITED is an active private limited company (company number 03929876) incorporated on 21 February 2000, registered in Durham. Its registered activity is research and experimental development on biotechnology (SIC 72110). Latest small accounts cover the period ending 31 July 2025, showing net assets of £840k and cash of £59k, with 17 employees on average. Net assets fell 18% on the prior period (£1.02m).
By net assets it sits in the top quarter of 2,418 comparable companies in the UK (median £1,000, upper quartile £92k).
Key dates
- Incorporated
- 21 February 2000
- Next accounts due
- 30 April 2027 — in 193 days
- Confirmation statement due
- 7 March 2027 — in 139 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
Activity
- SIC 72110
- Research and experimental development on biotechnology
- Accounts type
- Total Exemption Full
- Size band
- Small (Companies Act thresholds)
Financials — 2 periods on record, latest ending 31 July 2025
| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 July 2025 | £840k | £59k | — | £91k | — | — | 17 |
| 31 July 2024 | £1.02m | £120k | — | £107k | — | — | 15 |
- Current ratio
- 7.53 — comfortable
- Cash per employee
- £3,455
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
Firmoscan score: 80/100 (grade A)
- +10 Positive net assets — Net assets £840,428 at 2025-07-31
- +8 Comfortable liquidity — Current ratio 7.53
- +4 Cash reserves — Cash £58,727
- +8 Established — Incorporated 2000-02-21 (27 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
- Neil Fraser Sullivan — owns 50–75% of shares; holds 50–75% of voting rights · since 6 April 2016
- Ms Louise Claire Allcroft — owns 25–50% of shares; holds 25–50% of voting rights · since 25 May 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 Newcastle
Same activity (research and experimental development on biotechnology), closest in incorporation date.
- EPITOPE INFORMATICS LIMITED — Hexham, inc. Mar 2000
- AEIRTEC LTD — North Shields, inc. Sept 2003
- MDNA LIFE SCIENCES (UK) LTD — Newcastle Upon Tyne, inc. Mar 2005
- OPTIMUM SCIENTIFIC LIMITED — Morpeth, inc. Nov 2007
- IKSUDA THERAPEUTICS LIMITED — Newcastle Upon Tyne, inc. Nov 2007
- SANTON PROJECTS LTD — East Boldon, inc. Dec 2008
Reminders for COMPLEMENT GENOMICS LIMITED
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.