Tetra Tech UK Limited
Registered name: TETRA TECH UK LIMITED
Part of Tetra Tech, Inc. groupTetra Tech UK Limited made £13.6m profit in the year to 28 Sep 2025 (revenue not disclosed).
Tetra Tech UK Limited reported £13.6m profit in the year to 28 Sep 2025, down 1% on the year before; its revenue was not disclosed. It had 4 employees. The company is classified under “activities of head offices” and is based in Abingdon; we hold 4 years of its filed accounts.
- Status
- Active
- Location
- Abingdon, South East
- Age
- 7 yrs · since 2019
- Type
- Private Limited Company
Pass-through vehicle. This looks like a holding, staffing or umbrella company. Its revenue and profit may largely pass through to or from other entities, so the figures may not reflect a standalone operating business. It is excluded from our opportunity lists.
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.
Key figures
This company published its profit but not its turnover, so revenue and margins are not disclosed. We never estimate them.
Badges are automated estimates derived from the filed figures — not statements of fact about the company.
Financial history
| Year to | 30 Sep 2022 | 30 Sep 2023 | 30 Sep 2024 | 28 Sep 2025 |
|---|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Profit only | Profit only |
| Profit & loss | ||||
| Revenue (turnover) | £0 | £500k | — | — |
| Gross profit | £0 | £500k | — | — |
| Operating profit | −£10k | £431k | £370k | £754k |
| Profit before tax | −£10k | £9.1m | — | £17.4m |
| Profit after tax | −£10k | £7.1m | £13.7m | £13.6m |
| Profit (best available) | −£10k | £7.1m | £13.7m | £13.6m |
| Employees (average) | 4 | 5 | 4 | 4 |
| Ratios | ||||
| Profit margin | — | 1426% | — | — |
| Gross margin | — | 100% | — | — |
| Revenue per employee | £0 | £100k | — | — |
| Profit per employee | −£2.5k | £1.4m | £3.4m | £3.4m |
| Growth (year on year) | ||||
| Profit growth | — | — | ▲92.7% | ▼1% |
| Headcount growth | — | ▲25% | ▼20% | 0% |
| Balance sheet — indirect signals, not revenue | ||||
| Cash at bank | £7m | £6.9m | £4m | £16.4m |
| Net assets | £1.3m | £12.1m | £25.8m | £39.4m |
| Fixed assets | £8.3m | £12m | £12m | £12m |
| Current assets | £7m | £14.2m | £29.3m | £84.3m |
| Debtors | £0 | £7.3m | £25.3m | £67.9m |
| Deferred income | −£27k | £2k | £117k | £11k |
| Source | FullAccounts · bulk data Jun 2024 | FullAccounts · bulk data Jun 2024 | FullAccounts · bulk data May 2025 | FullAccounts · bulk data Apr 2026 |
How the business works
- Profit margin
- —
- Profit ÷ revenue.
- Gross margin
- —
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- —
- Revenue ÷ average employees.
- Profit per employee
- £3.4m
- 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.
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
- ▲53%
- Now £39.4m
- Cash at bank
- ▲311%
- Now £16.4m
- Headcount
- 0%
- Now 4
- Deferred income
- ▼91%
- Now £11k
- Fixed assets
- 0%
- Now £12m
Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.
Group structure
Ownership chain
- Tetra Tech, Inc. (registered outside the UK register)ultimate parent75–100%
- Tetra Tech UK Holdings Limited75–100%
- Tetra Tech UK Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Subsidiaries (5)
- Hoare Lea LLPRev. £121m · Profit £14.6m
- Ndy Consulting LimitedRev. £10.1m · Profit £908k
- Coffey Geotechnics LimitedRev. £7.2m · Profit −£61k
- Piteau Associates UK LimitedFigures not disclosed
- Tetra Tech International Development Europe LimitedFigures not disclosed
Sister companies (3)
- R P S Group LimitedFigures not disclosed
- Tetra Tech Europe Executive Services LimitedFigures not disclosed
- Tetra Tech UK Consulting Group LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Sources
Latest figures from FullAccounts for the year to 28 Sep 2025 (profit £13.6m), 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.