How much does Seiche Limited make?

Seiche Limited reported revenue of £9.8m and £101k profit in the year to 31 May 2025, according to its accounts filed at Companies House.

How many employees does Seiche Limited have?

Seiche Limited reported an average of 79 employees in the year to 31 May 2025.

Is Seiche Limited profitable?

Yes — Seiche Limited reported a profit of £101k in the year to 31 May 2025.

Company No. 03475558 · Incorporated 3 Dec 1997

Seiche Limited

Registered name: SEICHE LIMITED

Part of Seiche Water Technology Group Ltd group

Seiche Limited made £9.8m revenue and £101k profit in the year to 31 May 2025. read from filing text

Seiche Limited’s revenue grew 41% to £9.8m in the year to 31 May 2025, with £101k profit and 79 employees. The company is classified under “other research and experimental development on natural sciences and engineering” and is based in Holsworthy; we hold 4 years of its filed accounts.

Full P&L filedSection M · Professional, scientific and technical activitiesSIC 72190Other research and experimental development on natural sciences and engineering

Status: Active
Location: Holsworthy, South West
Age: 28 yrs · since 1997
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 May 2025

Key figures

Revenue

£9.8m

Growth ▲41.1%

Profit

£101k

Growth ▼84.7%

Profit margin

Gross 52.1%

Employees

Change ▲25.4%

Profit / employee

£1.3k

Revenue/employee £123k

Profitable streak

4yrs

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	Profit only	Full P&Lread from filing text	Full P&Lread from filing text	Full P&Lread from filing text
Profit & loss
Revenue (turnover)	—	£5.8m	£6.9m	£9.8m
Cost of sales	—	£2.5m	£2.9m	£4.7m
Gross profit	—	£3.3m	£4m	£5.1m
Operating profit	—	£388k	£689k	£408k
Profit before tax	—	£467k	£836k	£389k
Profit after tax	£339k	£431k	£660k	£101k
Profit (best available)	£339k	£431k	£660k	£101k
Staff costs	—	£2.8m	£2.8m	£4.1m
Employees (average)	48	53	63	79
Ratios
Profit margin	—	7.5%	9.6%	1%
Gross margin	—	56.8%	57.8%	52.1%
Revenue per employee	—	£109k	£110k	£123k
Profit per employee	£7.1k	£8.1k	£10.5k	£1.3k
Growth (year on year)
Revenue growth	—	—	▲19.9%	▲41.1%
Profit growth	—	▲27.1%	▲53.3%	▼84.7%
Headcount growth	—	▲10.4%	▲18.9%	▲25.4%
Balance sheet — indirect signals, not revenue
Cash at bank	£279k	£737k	£1.3m	£281k
Net assets	£4m	£4.3m	£4.4m	£4.3m
Fixed assets	£1.1m	£1.2m	£1.6m	£2.5m
Current assets	£3.4m	£5.8m	£4m	£4.8m
Debtors	£982k	£1.6m	£1.6m	£3.8m
Deferred income	£0	£303k	£307k	£912k
Source	Accounts · bulk data Feb 2024	Accounts · bulk data Feb 2024	FullAccounts · bulk data Feb 2025	FullAccounts · bulk data Mar 2026

Derived from the latest filing

How the business works

Profit margin: 1%; Profit ÷ revenue.
Gross margin: 52.1%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £123k; Revenue ÷ average employees.
Profit per employee: £1.3k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 25.3%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: 9.3%; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 39.3%; 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: ▼2%; Now £4.3m
Cash at bank: ▼78%; Now £281k
Headcount: ▲25%; Now 79
Deferred income: ▲197%; Now £912k
Fixed assets: ▲58%; Now £2.5m

Corporate ownership

Group structure

Ownership chain

Seiche Water Technology Group Ltdultimate parent75–100%
Seiche Limitedthis company

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

Subsidiaries (1)

Seiche Measurements LimitedFigures not disclosed

Sister companies (5)

Ashridge Engineering LimitedFigures not disclosed
Autonaut LimitedRev. — · Profit £599k
Seiche Environmental LtdFigures not disclosed
Seiche Operations LtdFigures not disclosed
Seiche Training 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 £101k), from the Companies House accounts bulk data published Mar 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.