£391k
Not reported the period beforeActive10053017Private limited companyMountain Ash
THERMETRIX LTD.
From public filings as at 31 Aug 2026; may contain errors or be out of date.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 Thermetrix Ltd. 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
THERMETRIX LTD. is an active private limited company (company number 10053017) incorporated on 9 March 2016, registered in Mountain Ash. Its registered activity is manufacture of electronic measuring, testing etc. equipment, not for industrial process control (SIC 26511). Latest abridged accounts cover the period ending 31 December 2025, showing net assets of £391k and cash of £16k, with 1 employee on average. As abridged accounts, no profit and loss account is filed, so turnover and profit are not public.
Peer position · net assets
By net assets it sits in the upper half of 889 comparable companies in the UK (median £28k, upper quartile £400k).
02
Ownership and control
No active person with significant control is registered.
- Mr Peter Plassmann
- owns 75–100% of shares
- holds 75–100% 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
- 9 March 201610 yrs ago
- Next accounts due
- 30 September 2027in 342 days
- Confirmation statement due
- 23 March 2027in 151 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
- Accounts type
- Unaudited Abridged
- Size band
- MicroCompanies Act thresholds
05
Financials
£16k
Not reported the period beforeNot disclosed
1
Not reported the period before| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 December 2025 | £391k | £16k | £643 | £63k | — | — | 1 |
| 1 January 2025 | — | — | — | — | — | — | — |
| 31 December 2024 | £303k | £1,146 | £2,272 | £224k | — | — | 5 |
Current ratio0.71Current assets ÷ creditors within one year
Cash per employee£16kCash ÷ 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 £391,107 at 31 December 2025
- Current assets below creditors within one yearCurrent ratio 0.71
- Three or more accounting periods on record3 periods on record
- Incorporated five or more years agoIncorporated 9 March 2016
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 151 days
- Accounts period endNet assets £391k · abridged accounts
- Accounts period end
- Accounts period endNet assets £303k · abridged accounts
- Incorporated
08
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All companies incorporated on 9 March 2016 · in Mar 2016.
09
Reminders for THERMETRIX LTD.
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.