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Company No. 12578676 · Incorporated 29 Apr 2020

Sep Hydrographic Limited

Registered name: SEP HYDROGRAPHIC LIMITED

Part of Survey Management Limited group

Sep Hydrographic Limited made £237k profit in the year to 31 Oct 2025 (revenue not disclosed).

Sep Hydrographic Limited reported £237k profit in the year to 31 Oct 2025, down 55% on the year before; its revenue was not disclosed. It had 8 employees. The company is classified under “quantity surveying activities” and is based in Skelmersdale; we hold 4 years of its filed accounts.

Profit onlySection M · Professional, scientific and technical activitiesSIC 74902Quantity surveying activities
Status
Active
Location
Skelmersdale, North West
Age
6 yrs · since 2020
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 Oct 2025

Key figures

Small team
Revenue
—
Not disclosed in filing
Profit
£237k
Growth ▼55.2%
Profit margin
—
 
Employees
8
Change ▼11.1%
Profit / employee
£29.7k
 
Profitable streak
2yrs
Consecutive profitable years in our data

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.

4 filed years

Financial history

Multi-year financials, oldest to newest
Year to31 Oct 202231 Oct 202331 Oct 202431 Oct 2025
DisclosureNo P&LNo P&LProfit onlyProfit only
Profit & loss
Revenue (turnover)————
Profit after tax——£530k£237k
Profit (best available)——£530k£237k
Employees (average)111098
Ratios
Profit margin————
Profit per employee——£58.9k£29.7k
Growth (year on year)
Profit growth———▼55.2%
Headcount growth—▼9.1%▼10%▼11.1%
Balance sheet — indirect signals, not revenue
Cash at bank£166k£230k£550k£314k
Net assets£227k£328k£858k£866k
Fixed assets£30.1k£21.8k£354k£381k
Current assets£277k£531k£883k£864k
Debtors£97.1k£209k£248k£447k
SourceFullAccounts · bulk data Jul 2024FullAccounts · bulk data Jul 2024FullAccounts · bulk data Jul 2025FullAccounts · bulk data Jul 2026
Derived from the latest filing

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
£29.7k
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.
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
▲1%
Now £866k
Cash at bank
▼43%
Now £314k
Headcount
▼11%
Now 8
Deferred income
—
Now —
Fixed assets
▲7%
Now £381k
Corporate ownership

Group structure

Ownership chain

  1. Survey Management Limitedultimate parent50–75%
  2. Sep Hydrographic Limitedthis company

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

Sister companies (7)

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 Oct 2025 (profit £237k), from the Companies House accounts bulk data published Jul 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.