How much does Active Tunnelling Limited make?

Active Tunnelling Limited reported revenue of £38.7m and £4.4m profit in the year to 31 Jul 2025, according to its accounts filed at Companies House.

How many employees does Active Tunnelling Limited have?

Active Tunnelling Limited reported an average of 40 employees in the year to 31 Jul 2025.

Is Active Tunnelling Limited profitable?

Yes — Active Tunnelling Limited reported a profit of £4.4m in the year to 31 Jul 2025.

Company No. 02895908 · Incorporated 8 Feb 1994

Active Tunnelling Limited

Registered name: ACTIVE TUNNELLING LIMITED

Part of John Doherty Holdings Limited group

Active Tunnelling Limited made £38.7m revenue and £4.4m profit in the year to 31 Jul 2025. read from filing text

Active Tunnelling Limited’s revenue grew 26% to £38.7m in the year to 31 Jul 2025, with £4.4m profit and 40 employees. The company is classified under “construction of bridges and tunnels” and is based in Coventry; we hold 2 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 42130Construction of bridges and tunnels SIC 42910Construction of water projects

Status: Active
Location: Coventry, West Midlands
Age: 32 yrs · since 1994
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 parent company of Active Tunnelling Limited is John Doherty Holdings Limited, consolidated accounts are available from its registered office, International House, Zone 4a Bayton Road, Exhall, Cove”

Latest accounts · year to 31 Jul 2025

Key figures

Capital-lightCash flow filed

Revenue

£38.7m

Growth ▲26.2%

Profit

£4.4m

Growth ▲24.6%

Profit margin

11.3%

Gross 20.1%

Employees

Change ▲11.1%

Profit / employee

£110k

Revenue/employee £966k

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	31 Jul 2024	31 Jul 2025
Disclosure	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	£30.6m	£38.7m
Cost of sales	£24.2m	£30.9m
Gross profit	£6.5m	£7.8m
Operating profit	£3.2m	£4.1m
Profit before tax	£3.1m	£4.1m
Profit after tax	£3.5m	£4.4m
Profit (best available)	£3.5m	£4.4m
Staff costs	£3.3m	£3.6m
Employees (average)	36	40
Ratios
Profit margin	11.5%	11.3%
Gross margin	21.1%	20.1%
Revenue per employee	£851k	£966k
Profit per employee	£97.7k	£110k
Cash conversion	−67.9%	−32.5%
Growth (year on year)
Revenue growth	—	▲26.2%
Profit growth	—	▲24.6%
Headcount growth	—	▲11.1%
Balance sheet — indirect signals, not revenue
Cash at bank	£2.3m	£2.9m
Net assets	£9.2m	£13.4m
Fixed assets	£1.9m	£1.8m
Current assets	£11.7m	£13.7m
Debtors	£2.2m	£1.5m
Deferred income	£879k	£542k
Cash from operations	−£2.2m	−£1.3m
Source	FullAccounts · bulk data Apr 2026	FullAccounts · bulk data Apr 2026

Derived from the latest filing

How the business works

Profit margin: 11.3%; Profit ÷ revenue.
Gross margin: 20.1%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £966k; Revenue ÷ average employees.
Profit per employee: £110k; Profit ÷ average employees.
Cash conversion: −32.5%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 4.7%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 1.4%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 3.9%; 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: ▲46%; Now £13.4m
Cash at bank: ▲30%; Now £2.9m
Headcount: ▲11%; Now 40
Deferred income: ▼38%; Now £542k
Fixed assets: ▼6%; Now £1.8m

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

John Doherty Holdings Limitedultimate parent75–100%
Active Tunnelling Limitedthis company

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

Sister companies (1)

Connect Pipeline LimitedFigures not disclosed

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 Jul 2025 (profit £4.4m), from the Companies House accounts bulk data published Apr 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.