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Company No. 00953609 · Incorporated 6 May 1969

Critical Maritime Systems & Support Limited

Registered name: CRITICAL MARITIME SYSTEMS & SUPPORT LIMITED

Part of Science Group PLC group

Critical Maritime Systems & Support Limited made £27.5m revenue and £4.3m profit in the year to 31 Dec 2025.

Critical Maritime Systems & Support Limited’s revenue grew 4% to £27.5m in the year to 31 Dec 2025, with £4.3m profit and 107 employees. The company is classified under “manufacture of other special-purpose machinery” and is based in Cambridge; we hold 3 years of its filed accounts.

Full P&L filedSection C · ManufacturingSIC 28990Manufacture of other special-purpose machinery n.e.c.
Status
Active
Location
Cambridge, East of England
Age
57 yrs · since 1969
Type
Private Limited Company

Part of a group. The filing indicates this company sits within a group structure, so its results may depend on intra-group trading and it may be hard to replicate independently.

Latest accounts · year to 31 Dec 2025

Key figures

Operating leverageDoing more with less
Revenue
£27.5m
Growth ▲4.5%
Profit
£4.3m
Growth ▲6.5%
Profit margin
15.5%
 
Employees
107
Change ▼5.3%
Profit / employee
£39.8k
Revenue/employee £257k
Profitable streak
3yrs
Consecutive profitable years in our data

Badges are automated estimates derived from the filed figures — not statements of fact about the company.

3 filed years

Financial history

Multi-year financials, oldest to newest
Year to31 Dec 202331 Dec 202431 Dec 2025
DisclosureFull P&LFull P&LFull P&L
Profit & loss
Revenue (turnover)£22.2m£26.4m£27.5m
Cost of sales£18.9m£21m−£22.4m
Operating profit£3.3m£5.4m£5.2m
Profit before tax£3m£5.3m£5.5m
Profit after tax£2.4m£4m£4.3m
Profit (best available)£2.4m£4m£4.3m
Employees (average)124113107
Ratios
Profit margin10.6%15.2%15.5%
Revenue per employee£179k£233k£257k
Profit per employee£19k£35.4k£39.8k
Growth (year on year)
Revenue growth—▲18.8%▲4.5%
Profit growth—▲70.2%▲6.5%
Headcount growth—▼8.9%▼5.3%
Balance sheet — indirect signals, not revenue
Net assets———
SourceAccounts · bulk data May 2025Accounts · bulk data May 2025Accounts · bulk data Aug 2026
Derived from the latest filing

How the business works

Profit margin
15.5%
Profit ÷ revenue.
Gross margin
—
Gross profit ÷ revenue. High for software and services.
Revenue per employee
£257k
Revenue ÷ average employees.
Profit per employee
£39.8k
Profit ÷ average employees.
Cash conversion
—
Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue
—
Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue
—
Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue
—
Money owed by customers. Low = customers pay quickly.
Indirect — not revenue

Balance-sheet signals

Year-on-year changes in filed balance-sheet items. They can hint at momentum (or investment) but are not revenue or profit and must not be read as such.

Net assets
—
Now —
Cash at bank
—
Now —
Headcount
▼5%
Now 107
Deferred income
—
Now —
Fixed assets
—
Now —
Corporate ownership

Group structure

Ownership chain

  1. Science Group PLCultimate parent75–100%
  2. Critical Maritime Systems & Support Limitedthis company

Bands show the share of ownership each company holds in the one below it.

Sister companies (9)

From the Persons with Significant Control register (corporate controllers only).

Same industry, similar size

Similar profitable businesses

Industry benchmarks →

Sources

Companies House profile Filing history & original accounts

Latest figures from accounts for the year to 31 Dec 2025 (profit £4.3m), from the Companies House accounts bulk data published Aug 2026. Spotted an error? Request a correction.

Updated from Companies House on 14 Oct 2026

Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.