PLEXTEK LIMITED
Company number 02305889 · Monitor this company
Executive summary
Plextek Limited is a founder-led, debt-free specialist consultancy with a 36-year technical moat in radar and communications, positioned at the centre of accelerating Western defence and security technology demand. The balance sheet is strong but under-deployed: over £2.8M sits as group lending rather than funding the headcount rebuild and IP productization that represent the firm's clearest growth path. The decisive strategic agenda is capacity restoration, capital redeployment, and succession planning — each addressable, none deferrable.
Shareholders' funds
£2,623,330
Balance sheet as at 2021-03-31
Overview
- Company type
- Private Limited Company
- Incorporated
- 1988-10-17
- Employees
- 17 (2021 accounts · was 23 in 2020)
- Registered office
- The Plextek Building London Road, Great Chesterford, Saffron Walden, United Kingdom, CB10 1NY
- Postcode
- CB10 1NY
- Capital
- 3,852 GBP
- Accounts category
- Total Exemption Full
- Charges
- 3 outstanding
Accounts
- Last made up to
- 2025-03-31
- Next due by
- 2026-12-31
- Financial year end
- 31 March
Confirmation statement
- Last statement dated
- 2026-10-14
- Next due by
- 2027-10-28
Nature of business (SIC)
- 74909 Other professional, scientific and technical activities not elsewhere classified
Officers 5 current · 5 resigned
Group structure 1 subsidiary
Controlled by PLEXTEK HOLDINGS LIMITED — since 2016-04-06
-
SENAPTIC LTD Dissolved
From persons-with-significant-control filings on the public register.
Data protection registration
Registered with the ICO as a data protection fee payer — Z7509571 (Tier 1), registered since 2003.
Information Commissioner's Office register of fee payers, licensed under the Open Government Licence.
Contact details
- Website
- plextek.com
Plextex is an engineering and consulting company, with over 35 years of experience working with governments and industry in radar, comms and data systems. Based in Cambridge, UK.
Previous company names
| Name | Date changed |
|---|---|
| KELLMAN LIMITED | 1989-03-29 |
Previous registered addresses 6
| Address | Changed on |
|---|---|
| PLEXTEK LONDON ROAD, GREAT CHESTERFORD, SAFFRON WALDEN, CB10 1NY, ENGLAND | 2018-02-07 |
| PLEXTEK BUILDING LONDON ROAD, GREAT CHESTERFORD, SAFFRON WALDEN, ESSEX, CB10 1NY, UNITED KINGDOM | 2018-02-07 |
| LONDON ROAD, GREAT CHESTERFORD, ESSEX, CB10 1NY | 2018-02-05 |
| SOUTH STREET, GREAT CHESTERFORD, ESSEX, CB10 1NW | 1996-12-11 |
| 61 PRESTWICK DRIVE, BISHOPS STRORTFORD, HERTFORDSHIRE | 1993-03-24 |
| 83/85 CITY ROAD, CARDIFF, CF2 3BL | 1989-04-24 |
Among its peers
Top 5%
by shareholders' funds, of 569 similar companies in CB
Among the biggest employers among its local peers (17 staff).
Among the oldest 25% of its local peers, trading since 1988.
Competitors Cambridge
This company ranks 15 among other professional, scientific and technical activities not elsewhere classified in Cambridge.
The class of 1988
45%
of the 202 companies in this sector incorporated in 1988 are still active today; 54% have since been dissolved.
A fact about the year, not a forecast for this company.