How much does Sinewave Energy Solutions Limited make?

Sinewave Energy Solutions Limited reported revenue of £30.1m and £2.4m profit in the year to 31 May 2025, according to its accounts filed at Companies House.

How many employees does Sinewave Energy Solutions Limited have?

Sinewave Energy Solutions Limited reported an average of 82 employees in the year to 31 May 2025.

Is Sinewave Energy Solutions Limited profitable?

Yes — Sinewave Energy Solutions Limited reported a profit of £2.4m in the year to 31 May 2025.

Company No. 09585850 · Incorporated 12 May 2015

Sinewave Energy Solutions Limited

Registered name: SINEWAVE ENERGY SOLUTIONS LIMITED

Part of Amplitude Topco Limited group

Sinewave Energy Solutions Limited made £30.1m revenue and £2.4m profit in the year to 31 May 2025. read from filing text

Sinewave Energy Solutions Limited’s revenue grew 48% to £30.1m in the year to 31 May 2025, with £2.4m profit and 82 employees. The company is classified under “construction of utility projects for electricity and telecommunications” and is based in Swindon; we hold 4 years of its filed accounts.

Full P&L filedSection F · ConstructionSIC 42220Construction of utility projects for electricity and telecommunications

Status: Active
Location: Swindon, South West
Age: 11 yrs · since 2015
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: “At year end the ultimate controlling party was Mr A M Woodley.”

Latest accounts · year to 31 May 2025

Key figures

Capital-lightOperating leverageCash flow filed

Revenue

£30.1m

Growth ▲48%

Profit

£2.4m

Growth ▲177%

Profit margin

7.8%

Gross 33.1%

Employees

Change ▲22.4%

Profit / employee

£28.7k

Revenue/employee £367k

Profitable streak

3yrs

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 May 2022	31 May 2023	31 May 2024	31 May 2025
Disclosure	No P&L	Full P&L	Full P&L	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	—	£12.8m	£20.3m	£30.1m
Cost of sales	—	£8.4m	£13.9m	£20.1m
Gross profit	—	£4.4m	£6.4m	£10m
Operating profit	—	£165k	£1.4m	£3m
Profit before tax	—	£72.4k	£1.2m	£3.2m
Profit after tax	—	£92.6k	£849k	£2.4m
Profit (best available)	—	£92.6k	£849k	£2.4m
Staff costs	—	£3.7m	£4m	£5.7m
Employees (average)	53	64	67	82
Ratios
Profit margin	—	0.7%	4.2%	7.8%
Gross margin	—	34.1%	31.7%	33.1%
Revenue per employee	—	£200k	£303k	£367k
Profit per employee	—	£1.4k	£12.7k	£28.7k
Cash conversion	—	−121.1%	−568.5%	155.6%
Growth (year on year)
Revenue growth	—	—	▲58.8%	▲48%
Profit growth	—	—	▲817%	▲177%
Headcount growth	—	▲20.8%	▲4.7%	▲22.4%
Balance sheet — indirect signals, not revenue
Cash at bank	£272k	£234k	£6.7m	£1.3m
Net assets	−£90.3k	£132k	£674k	£2.9m
Fixed assets	£266k	£317k	£291k	£468k
Current assets	£4.6m	£4.9m	£17.5m	£16.5m
Debtors	£1.9m	£2m	£4.9m	£4.9m
Deferred income	—	£806k	£8.4m	£8.6m
Cash from operations	—	−£200k	−£7.7m	£4.7m
Source	FullAccounts · bulk data Feb 2024	FullAccounts · bulk data Feb 2024	FullAccounts · bulk data Dec 2024	FullAccounts · bulk data Jan 2026

Derived from the latest filing

How the business works

Profit margin: 7.8%; Profit ÷ revenue.
Gross margin: 33.1%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £367k; Revenue ÷ average employees.
Profit per employee: £28.7k; Profit ÷ average employees.
Cash conversion: 155.6%; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 1.6%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 28.7%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 16.4%; 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: ▲324%; Now £2.9m
Cash at bank: ▼81%; Now £1.3m
Headcount: ▲22%; Now 82
Deferred income: ▲3%; Now £8.6m
Fixed assets: ▲61%; Now £468k

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

Amplitude Topco Limitedultimate parent75–100%
Amplitude Midco Limited75–100%
Amplitude Bidco Limited75–100%
Sinewave Energy Solutions Limitedthis company

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

Subsidiaries (2)

Amplify Ev LimitedFigures not disclosed
Voltform LimitedFigures 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 May 2025 (profit £2.4m), from the Companies House accounts bulk data published Jan 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.