How much does Sirius Remediation Limited make?

Sirius Remediation Limited reported revenue of £26.9m and £1.8m profit in the year to 31 Dec 2025, according to its accounts filed at Companies House.

How many employees does Sirius Remediation Limited have?

Sirius Remediation Limited reported an average of 104 employees in the year to 31 Dec 2025.

Is Sirius Remediation Limited profitable?

Yes — Sirius Remediation Limited reported a profit of £1.8m in the year to 31 Dec 2025.

Company No. 04860112 · Incorporated 7 Aug 2003

Sirius Remediation Limited

Registered name: SIRIUS REMEDIATION LIMITED

Part of Sirius Eot Limited group

Sirius Remediation Limited made £26.9m revenue and £1.8m profit in the year to 31 Dec 2025.

Sirius Remediation Limited’s revenue grew 38% to £26.9m in the year to 31 Dec 2025, with £1.8m profit and 104 employees. The company is classified under “remediation activities and other waste management services” and is based in Durham; we hold 4 years of its filed accounts.

Full P&L filedSection E · Water supply, sewerage and waste managementSIC 39000Remediation activities and other waste management services

Status: Active
Location: Durham, North East
Age: 23 yrs · since 2003
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.

Latest accounts · year to 31 Dec 2025

Key figures

Capital-lightOperating leverageBoring industry

Revenue

£26.9m

Growth ▲38.3%

Profit

£1.8m

Growth ▲222.8%

Profit margin

6.8%

Gross 25.7%

Employees

104

Change ▲5.1%

Profit / employee

£17.5k

Revenue/employee £258k

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	Full P&L	Full P&L	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£33.3m	£18.8m	£19.4m	£26.9m
Cost of sales	£23.4m	£15.4m	£14.7m	£20m
Gross profit	£9.9m	£3.4m	£4.7m	£6.9m
Operating profit	£5.1m	−£514k	£801k	£2.4m
Profit before tax	£5.1m	−£489k	£762k	£2.4m
Profit after tax	£4.6m	−£565k	£563k	£1.8m
Profit (best available)	£4.6m	−£565k	£563k	£1.8m
Staff costs	£6.1m	£5.8m	£5.7m	£6.2m
Employees (average)	113	109	99	104
Ratios
Profit margin	13.9%	−3%	2.9%	6.8%
Gross margin	29.8%	18.2%	24.4%	25.7%
Revenue per employee	£295k	£172k	£196k	£258k
Profit per employee	£41.1k	−£5.2k	£5.7k	£17.5k
Growth (year on year)
Revenue growth	—	▼43.6%	▲3.6%	▲38.3%
Profit growth	—	▼112.2%	—	▲222.8%
Headcount growth	—	▼3.5%	▼9.2%	▲5.1%
Balance sheet — indirect signals, not revenue
Cash at bank	£6.5m	£2.1m	£2m	£6.2m
Net assets	£10m	£5.5m	£5.6m	£5.9m
Fixed assets	£194k	£438k	£228k	£147k
Current assets	£13.3m	£7.8m	£8.5m	£11.8m
Debtors	£128k	£105k	£34.1k	£108k
Source	FullAccounts · bulk data Sep 2024	FullAccounts · bulk data Sep 2024	FullAccounts · bulk data Sep 2025	FullAccounts · bulk data Aug 2026

Derived from the latest filing

How the business works

Profit margin: 6.8%; Profit ÷ revenue.
Gross margin: 25.7%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £258k; Revenue ÷ average employees.
Profit per employee: £17.5k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 0.5%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: —; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 0.4%; 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: ▲6%; Now £5.9m
Cash at bank: ▲213%; Now £6.2m
Headcount: ▲5%; Now 104
Deferred income: —; Now —
Fixed assets: ▼36%; Now £147k

Corporate ownership

Group structure

Ownership chain

Sirius Eot Limitedultimate parent75–100%
Sirius Engineering Group Ltd75–100%
Sirius Remediation Limitedthis company

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

Sister companies (8)

Sirius Civil Engineering LimitedRev. £29.1m · Profit £728k
Sirius Demolition LtdFigures not disclosed
Sirius Drilling LtdFigures not disclosed
Sirius Environmental LtdFigures not disclosed
Sirius Geotechnical LtdFigures not disclosed
Sirius Planning LtdFigures not disclosed
Sirius Plant LtdFigures not disclosed
Sirius Renewable Energy LtdFigures not disclosed

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

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Dec 2025 (profit £1.8m), from the Companies House accounts bulk data published Aug 2026. Spotted an error? Request a correction.

Updated from Companies House on 22 Oct 2026

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