How much does Cook Defence Systems Limited make?

Cook Defence Systems Limited reported revenue of £51.4m and £4.1m profit in the year to 28 Jun 2025, according to its accounts filed at Companies House.

How many employees does Cook Defence Systems Limited have?

Cook Defence Systems Limited reported an average of 6 employees in the year to 28 Jun 2025.

Is Cook Defence Systems Limited profitable?

Yes — Cook Defence Systems Limited reported a profit of £4.1m in the year to 28 Jun 2025.

Company No. 06792266 · Incorporated 15 Jan 2009

Cook Defence Systems Limited

Registered name: COOK DEFENCE SYSTEMS LIMITED

Part of Heico Corporation group

Cook Defence Systems Limited made £51.4m revenue and £4.1m profit in the year to 28 Jun 2025.

Cook Defence Systems Limited’s revenue grew 4% to £51.4m in the year to 28 Jun 2025, with £4.1m profit and 6 employees. The company is classified under “agents involved in the sale of machinery, industrial equipment, ships and aircraft” and is based in Bishop Auckland; we hold 2 years of its filed accounts.

Full P&L filedSection G · Wholesale and retail trade; repair of motor vehiclesSIC 46140Agents involved in the sale of machinery, industrial equipment, ships and aircraft SIC 84220Defence activities

Status: Active
Location: Bishop Auckland, North East
Age: 17 yrs · since 2009
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. From the filing: “As at the 28 June 2025, the immediate and ultimate parent company is William Cook Holdings Limited, a company incorporated in England and Wales. William Cook Holdings Limited is the largest and smalle”

Latest accounts · year to 28 Jun 2025

Key figures

Small teamCapital-lightOperating leverageDoing more with less

Revenue

£51.4m

Growth ▲4.4%

Profit

£4.1m

Growth ▲55.3%

Profit margin

Gross 27.8%

Employees

Change ▼14.3%

Profit / employee

£683k

Revenue/employee £8.6m

Profitable streak

2yrs

Consecutive profitable years in our data

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

2 filed years

Financial history

Multi-year financials, oldest to newest
Year to	29 Jun 2024	28 Jun 2025
Disclosure	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£49.2m	£51.4m
Cost of sales	£35.9m	£37.1m
Gross profit	£13.3m	£14.3m
Operating profit	£4.7m	£5.5m
Profit before tax	£4.7m	£5.5m
Profit after tax	£2.6m	£4.1m
Profit (best available)	£2.6m	£4.1m
Staff costs	£417k	£346k
Employees (average)	7	6
Ratios
Profit margin	5.4%	8%
Gross margin	27%	27.8%
Revenue per employee	£7m	£8.6m
Profit per employee	£377k	£683k
Growth (year on year)
Revenue growth	—	▲4.4%
Profit growth	—	▲55.3%
Headcount growth	—	▼14.3%
Balance sheet — indirect signals, not revenue
Cash at bank	£580k	£1.1m
Net assets	£6.3m	£10.4m
Fixed assets	£2.3m	£2.2m
Current assets	£15.2m	£18.8m
Debtors	£3.4m	£3.9m
Deferred income	£5m	£1.5m
Source	FullAccounts · bulk data Mar 2026	FullAccounts · bulk data Mar 2026

Derived from the latest filing

How the business works

Profit margin: 8%; Profit ÷ revenue.
Gross margin: 27.8%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £8.6m; Revenue ÷ average employees.
Profit per employee: £683k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 4.3%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 2.9%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 7.5%; 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: ▲65%; Now £10.4m
Cash at bank: ▲84%; Now £1.1m
Headcount: ▼14%; Now 6
Deferred income: ▼70%; Now £1.5m
Fixed assets: ▼4%; Now £2.2m

Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.

Corporate ownership

Group structure

Ownership chain

Heico Corporation (registered outside the UK register)ultimate parent75–100%
Heico-Cook Defence Ltd75–100%
Cook Defence Systems Limitedthis company

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

Sister companies (2)

William Cook Stanhope LimitedRev. £39.2m · Profit £7m
William Cook Intermodal LimitedFigures not disclosed

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

Same industry, similar size

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 28 Jun 2025 (profit £4.1m), from the Companies House accounts bulk data published Mar 2026. Spotted an error? Request a correction.

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