LUDLUM SYSTEMS LIMITED

Active
Company number 13025528Private limited companyIncorporated 2020

Key figures

£445,503+94.3%
Net assets 2025
-200 k0200 k400 k600 k20212022202320242025

Like most small UK companies, LUDLUM SYSTEMS LIMITED does not publish a profit and loss account in its latest accounts. The figures below come from the balance sheet.

Ratios

2025

Sector comparison

SIC 71129

Where the company stands among the 26,451 active companies whose first SIC code is 71129 (Other engineering activities).

Net assets£445,503
Higher than 92% · median £14,496
Total assets£1,599,305
Higher than 95% · median £45,430
Cash£723,016
Higher than 95% · median £26,683
Employees0
Lower than 75% · median 1
Company age6.0 years
Older than 52% · median 5.5 years
Largest in this sector by net assets
  1. BABCOCK INTERNATIONAL GROUP PLC£629.3m
  2. MOTT MACDONALD GROUP LIMITED£523.3m
  3. MOTT MACDONALD LIMITED£509.3m
  4. JACOBS U.K. LIMITED£337.2m
  5. LOCKHEED MARTIN HELICOPTER COMPANY LTD£152.8m
  6. WILLIAMS GRAND PRIX ENGINEERING LIMITED£98.6m
  7. EXXONMOBIL ENGINEERING EUROPE LIMITED£77.9m
  8. TETRA TECH LIMITED£70.8m
  9. FRAZER-NASH CONSULTANCY LIMITED£64.8m
  10. CAPITA PROPERTY AND INFRASTRUCTURE LIMITED£60.2m

Positions are approximate. Figures come from each company's latest accounts; money and employee figures are compared only with companies that filed accounts in pounds for a period ending in the last two and a half years and are not dormant, so those groups are smaller than 26,451. The line on each bar marks the median.

Summary: LUDLUM SYSTEMS LIMITED

What kind of company is it?

LUDLUM SYSTEMS LIMITED is a private limited company registered with Companies House under company number 13025528. It was incorporated on 17 Nov 2020. Its status is active. The registered office is in Uxbridge (UB8). Its nature of business (SIC 2007) is other engineering activities (71129).

How is the company doing financially?

The latest accounts in the database are for 2025 (period ending 31 Dec 2025); the company files small company accounts. Net assets were £445,503, up 94.3% on the previous year. Cash at bank and in hand was £723,016. The company had an average of 0 employees. Figures are available for 5 financial years (2021–2025).

How does it compare with similar companies?

Compared with 26,451 active companies whose first SIC code is 71129: By net assets it ranks higher than 92% of them (median £14,496). By total assets it ranks higher than 95% of them (median £45,430). By cash it ranks higher than 95% of them (median £26,683). By number of employees it ranks lower than 75% of them (median 1). It is older than 52% of them (median age 5.5 years).

Does it supply the public sector?

The company is named as a supplier in 11 public contract award notices from 7 public sector buyers since 2023. Contracts awarded to it alone have a combined published value of £10.8m. Its most frequent buyer is Nuclear Restoration Services Limited (3 contracts).

What do public registers and reports show?

HMRC lists it as an importer of goods, mainly optical, medical and measuring instruments, electrical equipment, inorganic chemicals. HMRC lists it as an exporter of goods, mainly optical, medical and measuring instruments.

Who runs and controls the company?

The company has 3 current directors. One person with significant control is registered.

When are its next filings due?

The next accounts are due by 30 Sep 2027. The next confirmation statement is due by 29 Jun 2027.

Filed accounts2021–2025
20212022202320242025
Profit for the year—-30,171———
Cash at bank and in hand96,236121,044195,930628,449723,016
Total assets277,529308,1321,038,2131,362,2511,599,305
Total liabilities303,879364,653968,1731,097,099—
Net assets / total equity-26,350-56,52138,940229,259445,503
Average number of employees101114180

A dash (—) means no accounts were filed for that year or the item is not in the accounts; 0 is a zero stated in the accounts. Small companies usually file only a balance sheet, so the profit and loss account is often missing.

Public contracts

11 contracts

LUDLUM SYSTEMS LIMITED is named as a supplier in 11 public contract award notices from 7 public sector buyers since 2023. The 10 contracts awarded to it alone with a published value add up to £10.8m.

Contracts per year
Main buyers7
Nuclear Restoration Services Limited
3 contracts · £341.7k
Nuclear Restoration Services
3 contracts · £245.7k
SELLAFIELD LIMITED
1 contract · £4.5m
Magnox Limited
1 contract · £4.4m
NRS
1 contract · £1.2m
Contracts
  1. DNA Boilers - Purchase of Waste Monitoring Equipment‡NRS · £1,219,112 · runs until Jul 2027
  2. Proposed award of Upgrade of Installed Personal Monitors (IPM9 x 2) Hunterston A‡Nuclear Restoration Services Limited · £155,000
  3. IPM9 Rebuild Kit‡Dounreay · £68,099
  4. Berkeley - Delivery of a Functional RADOS Machine with On-Site Installation etc‡Nuclear Restoration Services · £40,075
  5. Model 4530-14000 Gate Monitor - G5 Base System‡nuclear restoration services · £108,109
Show 6 more
  1. HFC-8 WITH ALPHA BETA PLASTIC DETECTORS‡Nuclear Restoration Services Limited · £80,757
  2. QA2 GOODS - HWM-400 4 DETECTOR WITH 30MM LEAD SHIELDING - 1 MANUAL DOOR‡NUCLEAR RESTORATION SERVICES · £97,486
  3. 2 X HWM-38 Clearance Monitors SGHWR‡Nuclear Restoration Services Limited · £105,961
  4. Calibration & Maintenance of Radiological Measuring Instruments Services‡Magnox Limited · £4,400,000
  5. IPM Upgrade‡CTM Portal for the NDA Shared Services Alliance
  6. Thermo 7,8 and 9 Radiometric IPM Upgrade KitsSELLAFIELD LIMITED · £4,500,000

From contract award notices on Contracts Finder (since 2016) and Find a Tender (since 2021), published by the Cabinet Office under the Open Government Licence v3.0. Values are as published by the buyer and usually cover the whole contract term; the total leaves out awards shared between several suppliers, where the published figure is a ceiling for all of them, placeholder values and single figures of £1 billion or more. Notices marked ‡ do not state a company number and were linked by an exact match on the registered name. Contracts below the publication thresholds and those of devolved buyers that publish elsewhere are not included.

Registers and licences

International trade‡

Listed by HMRC as an importer of goods in 12 of the last 12 months on record, most recently August 2026. Main goods: optical, medical and measuring instruments, electrical equipment, inorganic chemicals, plastics and machinery.

Listed by HMRC as an exporter of goods in 6 of the last 12 months on record, most recently August 2026. Main goods: optical, medical and measuring instruments.

From HMRC's monthly lists of importers and exporters. Traders can ask to be left off the lists, so absence does not mean a company does not trade.

Sources: Charity Commission for England and Wales, Care Quality Commission, Home Office and HM Revenue & Customs, under the Open Government Licence v3.0. Entries marked ‡ come from lists that do not state a company number and were linked by an exact match on the registered name.

History

12 events
  1. Financial year 2025 endedAccounts: net assets £445.5k, 0 employees
  2. Financial year 2024 endedAccounts: net assets £229.3k, 18 employees
  3. Financial year 2023 endedAccounts: net assets £38.9k, 14 employees
  4. Financial year 2022 endedAccounts: net assets −£56.5k, 11 employees
  5. Financial year 2021 endedAccounts: net assets −£26.4k, 10 employees
  6. Paul Michael READ appointedDirector
  7. Laurence Merl LUDLUM appointedDirector
  8. Jeanie Kay MCPHERSON appointedDirector
Earlier events (4)
  1. Mr Laurence Merl Ludlum registered as a person with significant control
  2. Ludlum Measurements,Inc. registered as a person with significant control
  3. Ludlum Measurements,Inc. ceased to be a person with significant control
  4. Company incorporatedPrivate limited company

Dates as recorded at Companies House: incorporation, name changes, officer appointments and resignations, current and former persons with significant control, and the end of each financial year with figures in the database.