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Company No. 12297489 · Incorporated 4 Nov 2019

Ionian 1 Limited

Registered name: IONIAN 1 LIMITED

Part of Iih Trustee Limited group

Ionian 1 Limited made £5.9m profit in the year to 30 Sep 2025 (revenue not disclosed).

Ionian 1 Limited reported £5.9m profit in the year to 30 Sep 2025; its revenue was not disclosed. It had 15 employees. The company is classified under “non-trading company” and is based in London; we hold 4 years of its filed accounts.

Status
Active
Location
London, London
Age
6 yrs · since 2019
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 30 Sep 2025

Key figures

Revenue
—
Not disclosed in filing
Profit
£5.9m
Growth —
Profit margin
—
 
Employees
15
Change ▲15.4%
Profit / employee
£394k
 
Profitable streak
1yr
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 to30 Nov 202230 Nov 202331 Oct 202430 Sep 2025
DisclosureNo P&LNo P&LNo P&LProfit only
Profit & loss
Revenue (turnover)————
Profit after tax———£5.9m
Profit (best available)———£5.9m
Employees (average)——1315
Ratios
Profit margin————
Profit per employee———£394k
Growth (year on year)
Headcount growth———▲15.4%
Balance sheet — indirect signals, not revenue
Net assets£4£4£10m£10m
Fixed assets——£10m£10m
Current assets—£4£4£4
Debtors—£4£4£4
SourceFullAccounts · bulk data Nov 2023FullAccounts · bulk data Nov 2023FullAccounts · 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
£394k
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
0%
Now £10m
Cash at bank
—
Now —
Headcount
▲15%
Now 15
Deferred income
—
Now —
Fixed assets
0%
Now £10m
Corporate ownership

Group structure

Ownership chain

  1. Iih Trustee Limitedultimate parent75–100%
  2. Ionian 1 Limitedthis company

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

Subsidiaries (4)

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

Sources

Latest figures from FullAccounts for the year to 30 Sep 2025 (profit £5.9m), 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.