£839k
−11%vs Mar 2024Active02715464Private limited companyWatford
SEMIMETRICS LIMITED
Significant control: Oliver Don (75–100%)
From public filings as at 31 Aug 2026; may contain errors or be out of date.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 Semimetrics Limited sell?
Registered activity: Manufacture of electronic measuring, testing etc. equipment, not for industrial process control (SIC 26511). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
SEMIMETRICS LIMITED is an active private limited company (company number 02715464) incorporated on 18 May 1992, registered in Watford. Its registered activity is manufacture of electronic measuring, testing etc. equipment, not for industrial process control (SIC 26511). Latest small accounts cover the period ending 31 March 2025, showing net assets of £839k and cash of £843k, with 3 employees on average. Net assets fell 11% on the prior period (£943k).
Peer position · net assets
By net assets it sits in the top quarter of 57 comparable companies in Greater London (median £80k, upper quartile £701k).
02
Ownership and control
- Mr Oliver Don
- owns 75–100% of shares
- holds 75–100% of voting rights
- can appoint or remove directors
- Mrs Barbel Don
- owns 25–50% of shares
- holds 25–50% of voting rights
- Mr Eric Robertson Don
- 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
- 18 May 199234 yrs ago
- Next accounts due
- 31 December 2026in 68 days
- Confirmation statement due
- 1 June 2027in 220 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 26511
- Manufacture of electronic measuring, testing etc. equipment, not for industrial process control
- SIC 46140
- Agents involved in the sale of machinery, industrial equipment, ships and aircraft
- SIC 62020
- Information technology consultancy activities
- Accounts type
- Total Exemption Full
- Size band
- MicroCompanies Act thresholds
05
Financials
£843k
−12%vs Mar 2024Not reported
3
No changevs Mar 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 March 2025 | £839k | £843k | — | £24k | — | — | 3 |
| 31 March 2024 | £943k | £954k | — | £34k | — | — | 3 |
Current ratio34.6Current assets ÷ creditors within one year
Cash per employee£281kCash ÷ 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 £839,339 at 31 March 2025
- Current assets at least 1.5× creditors within one yearCurrent ratio 34.6
- Cash at bank of £50,000 or moreCash £843,193
- Incorporated five or more years agoIncorporated 18 May 1992
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 220 days
- Next accounts duein 68 days
- Accounts period endNet assets £839k · small accounts
- Accounts period endNet assets £943k · small accounts
- Incorporated
08
Similar companies in Greater London
- SCANPROBE TECHNIQUES LIMITEDSidcup · inc. Jan 1992
- SURFACE MEASUREMENT SYSTEMS LIMITEDMiddlesex · inc. Nov 1989
- TWICKENHAM SCIENTIFIC INSTRUMENTS LIMITEDMiddlesex · inc. Nov 1994
- COHERENT RESEARCH LIMITEDKingston Upon Thames · inc. Aug 1989
- TRACE MEASUREMENT LIMITEDGrays · inc. Jan 1989
- LEVEL DEVELOPMENTS LIMITEDCroydon · inc. Oct 1987
All companies incorporated on 18 May 1992 · in May 1992.
09
Reminders for SEMIMETRICS LIMITED
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.