How much does Thornton Tomasetti Defence Limited make?

Thornton Tomasetti Defence Limited reported revenue of £7.5m and £1.1m profit in the year to 31 Dec 2025, according to its accounts filed at Companies House.

How many employees does Thornton Tomasetti Defence Limited have?

Thornton Tomasetti Defence Limited reported an average of 42 employees in the year to 31 Dec 2025.

Is Thornton Tomasetti Defence Limited profitable?

Yes — Thornton Tomasetti Defence Limited reported a profit of £1.1m in the year to 31 Dec 2025.

Company No. 02390791 · Incorporated 31 May 1989

Thornton Tomasetti Defence Limited

Registered name: THORNTON TOMASETTI DEFENCE LIMITED

Thornton Tomasetti Defence Limited made £7.5m revenue and £1.1m profit in the year to 31 Dec 2025. read from filing text

Thornton Tomasetti Defence Limited’s revenue grew 8% to £7.5m in the year to 31 Dec 2025, with £1.1m profit and 42 employees. The company is classified under “other engineering activities” and is based in London; we hold 4 years of its filed accounts.

Full P&L filedSection M · Professional, scientific and technical activitiesSIC 71129Other engineering activities

Status: Active
Location: London, London
Age: 37 yrs · since 1989
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: “The ultimate parent company is Thornton Tomasetti Inc, a company registered in the United States of America, with a registered address of 120 Broadway, New York, NY 10271, USA. This is the largest and”

Latest accounts · year to 31 Dec 2025

Key figures

Operating leverage

Revenue

£7.5m

Growth ▲8.1%

Profit

£1.1m

Growth ▲28.7%

Profit margin

14%

Gross 66.4%

Employees

Change ▲10.5%

Profit / employee

£25.1k

Revenue/employee £179k

Profitable streak

4yrs

Consecutive profitable years in our data

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

4 filed years

Financial history

Multi-year financials, oldest to newest
Year to	31 Dec 2022	31 Dec 2023	31 Dec 2024	31 Dec 2025
Disclosure	Profit only	Profit only	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	—	—	£7m	£7.5m
Cost of sales	—	—	£2.6m	£2.5m
Gross profit	—	—	£4.3m	£5m
Profit before tax	—	—	£1.1m	£1.4m
Profit after tax	£425k	£37.8k	£819k	£1.1m
Profit (best available)	£425k	£37.8k	£819k	£1.1m
Employees (average)	35	37	38	42
Ratios
Profit margin	—	—	11.8%	14%
Gross margin	—	—	62.2%	66.4%
Revenue per employee	—	—	£183k	£179k
Profit per employee	£12.1k	£1k	£21.6k	£25.1k
Growth (year on year)
Revenue growth	—	—	—	▲8.1%
Profit growth	—	▼91.1%	▲2070%	▲28.7%
Headcount growth	—	▲5.7%	▲2.7%	▲10.5%
Balance sheet — indirect signals, not revenue
Cash at bank	£173k	£57.1k	£230k	£1.1m
Net assets	£3m	£3.1m	£3.9m	£4.9m
Fixed assets	£937k	£857k	£965k	£819k
Current assets	£4.3m	£4.9m	£6m	£6.7m
Debtors	£899k	£1.1m	£1.6m	£991k
Source	FullAccounts · bulk data Jul 2024	FullAccounts · bulk data Jul 2024	FullAccounts · bulk data Sep 2025	FullAccounts · bulk data Jul 2026

Derived from the latest filing

How the business works

Profit margin: 14%; Profit ÷ revenue.
Gross margin: 66.4%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £179k; Revenue ÷ average employees.
Profit per employee: £25.1k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 10.9%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: —; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 13.2%; 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: ▲27%; Now £4.9m
Cash at bank: ▲393%; Now £1.1m
Headcount: ▲11%; Now 42
Deferred income: —; Now —
Fixed assets: ▼15%; Now £819k

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Dec 2025 (profit £1.1m), from the Companies House accounts bulk data published Jul 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.