How much does STS Engine Services Limited make?

STS Engine Services Limited reported revenue of £16.9m and £1.9m profit in the year to 31 Dec 2025, according to its accounts filed at Companies House.

How many employees does STS Engine Services Limited have?

STS Engine Services Limited reported an average of 85 employees in the year to 31 Dec 2025.

Is STS Engine Services Limited profitable?

Yes — STS Engine Services Limited reported a profit of £1.9m in the year to 31 Dec 2025.

Company No. 07301752 · Incorporated 1 Jul 2010

STS Engine Services Limited

Registered name: STS ENGINE SERVICES LIMITED

Part of STS Aviation Europe Limited group

STS Engine Services Limited made £16.9m revenue and £1.9m profit in the year to 31 Dec 2025.

STS Engine Services Limited’s revenue grew 11% to £16.9m in the year to 31 Dec 2025, with £1.9m profit and 85 employees. The company is classified under “service activities incidental to air transportation” and is based in Birmingham; we hold 4 years of its filed accounts.

Full P&L filedSection H · Transportation and storageSIC 52230Service activities incidental to air transportation

Status: Active
Location: Birmingham, West Midlands
Age: 16 yrs · since 2010
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: “GTES Holdings Limited is the Company's immediate parent undertaking, a company incorporated in England and Wales. The smallest group in which the company's results are consolidated in to is headed up ”

Latest accounts · year to 31 Dec 2025

Key figures

Operating leverage

Revenue

£16.9m

Growth ▲10.6%

Profit

£1.9m

Growth ▲26.2%

Profit margin

11.1%

Gross 40.9%

Employees

Change ▲19.7%

Profit / employee

£21.9k

Revenue/employee £199k

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.

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	No P&L	No P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	—	—	£15.3m	£16.9m
Cost of sales	—	—	£8.9m	£10m
Gross profit	—	—	£6.4m	£6.9m
Operating profit	—	—	£1.7m	£1.9m
Profit before tax	—	—	£1.7m	£1.9m
Profit after tax	—	—	£1.5m	£1.9m
Profit (best available)	—	—	£1.5m	£1.9m
Staff costs	—	—	£4.5m	£5.1m
Employees (average)	38	49	71	85
Ratios
Profit margin	—	—	9.7%	11.1%
Gross margin	—	—	41.8%	40.9%
Revenue per employee	—	—	£215k	£199k
Profit per employee	—	—	£20.8k	£21.9k
Growth (year on year)
Revenue growth	—	—	—	▲10.6%
Profit growth	—	—	—	▲26.2%
Headcount growth	—	▲28.9%	▲44.9%	▲19.7%
Balance sheet — indirect signals, not revenue
Cash at bank	£543k	£1.4m	£470k	£68k
Net assets	£2m	£2.8m	£4.2m	£6.1m
Fixed assets	£1.3m	£1.5m	£1.6m	£1.9m
Current assets	£3.5m	£4.3m	£5.8m	£8m
Debtors	£1.1m	£663k	£1.3m	£3m
Deferred income	£723k	£634k	£1.2m	£1.7m
Source	FullAccounts · bulk data Sep 2024	FullAccounts · bulk data Sep 2024	FullAccounts · bulk data May 2026	FullAccounts · bulk data May 2026

Derived from the latest filing

How the business works

Profit margin: 11.1%; Profit ÷ revenue.
Gross margin: 40.9%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £199k; Revenue ÷ average employees.
Profit per employee: £21.9k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 11.1%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 10.3%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 17.9%; 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: ▲44%; Now £6.1m
Cash at bank: ▼86%; Now £68k
Headcount: ▲20%; Now 85
Deferred income: ▲41%; Now £1.7m
Fixed assets: ▲15%; Now £1.9m

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

STS Aviation Europe Limitedultimate parent75–100%
Gtes Holdings Limited75–100%
STS Engine Services Limitedthis company

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

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 FullAccounts for the year to 31 Dec 2025 (profit £1.9m), from the Companies House accounts bulk data published May 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.