£30.41m
−11%vs Dec 2023Active00138006Private limited companyDartford
SEM LIMITED
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
01
Summary
SEM LIMITED is an active private limited company (company number 00138006) incorporated on 17 October 1914, registered in Dartford. Its registered activity is manufacture of electric motors, generators and transformers (SIC 27110). Latest full accounts cover the period ending 31 December 2024, showing net assets of £30.41m and cash of £4.74m, with 133 employees on average. Turnover was £17.81m and profit for the year £1.12m. Net assets fell 11% on the prior period (£34.29m).
Peer position · net assets
By net assets it sits in the top quarter of 350 comparable companies in the UK (median £10k, upper quartile £248k).
02
Key dates
- Incorporated
- 17 October 1914112 yrs ago
- Next accounts due
- 30 September 202622 days overdue
- Confirmation statement due
- 31 October 2026in 9 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
03
Activity
- SIC 27110
- Manufacture of electric motors, generators and transformers
- Accounts type
- Full
- Size band
- MediumCompanies Act thresholds
04
Financials
£4.74m
+133%vs Dec 2023£17.81m
−9%vs Dec 2023133
+2%vs Dec 2023| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 31 December 2024 | £30.41m | £4.74m | £3.65m | — | £17.81m | £1.12m | 133 |
| 31 December 2023 | £34.29m | £2.04m | £11.11m | — | £19.53m | £251k | 131 |
| 31 December 2022 | — | — | — | — | — | — | — |
Net margin6.3%Profit for the year ÷ turnover
Cash per employee£36kCash ÷ average employees
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.
05
Filing and accounts signals
- Net assets above zeroNet assets £30,406,862 at 31 December 2024
- Cash at bank of £50,000 or moreCash £4,739,624
- Three or more accounting periods on record3 periods on record
- Incorporated five or more years agoIncorporated 17 October 1914
- Accounts past their due dateDue 30 September 2026
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 They are not a rating, a prediction or advice, and may be incomplete or out of date.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.
06
Ownership and control
- Westec Holding Company Limited
- owns 75–100% of shares
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents.
07
Timeline
- Confirmation statement duein 9 days
- Next accounts due22 days overdue
- Accounts period endNet assets £30.41m · full accounts
- Accounts period endNet assets £34.29m · full accounts
- Accounts period end
- Incorporated
08
Similar companies in Greater London
- C.G. & W. YOUNG LIMITEDTwickenham · inc. Sept 1974
- PRESTOLITE ELECTRIC LIMITEDMiddlesex · inc. Oct 1974
- COULSTOCK & PLACE ENGINEERING CO LIMITEDDartford · inc. Jul 1986
- RULIX INDUSTRIES LTDEffingham · inc. Apr 1993
- VALRADIO ELECTRONICS LIMITEDMiddlesex · inc. Oct 1995
- JM TRANSFORMERS LIMITEDLeatherhead · inc. Nov 2003
All companies incorporated on 17 October 1914 · in Oct 1914.
09
Reminders for SEM LIMITED
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.