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Company No. 10915566 · Incorporated 15 Aug 2017

Penwortham Storage Limited

Registered name: PENWORTHAM STORAGE LIMITED

Part of Gresham House Energy Storage Fund PLC group

Penwortham Storage Limited made £3.5m revenue and a £5.2m loss in the year to 31 Dec 2025.

Penwortham Storage Limited’s revenue was £3.5m in the year to 31 Dec 2025, with a loss of £5.2m. The company is classified under “production of electricity” and is based in London.

Full P&L filedSection D · Electricity, gas, steam and air conditioning supplySIC 35110Production of electricity
Status
Active
Location
London, London
Age
9 yrs · since 2017
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

Revenue
£3.5m
Growth —
Profit
−£5.2m
Growth —
Profit margin
−148.2%
Gross 89.4%
Employees
—
Change —
Profit / employee
—
 
Profitable streak
0yrs
Consecutive profitable years in our data

Badges are automated estimates derived from the filed figures — not statements of fact about the company.

1 filed year

Financial history

Multi-year financials, oldest to newest
Year to31 Dec 2025
DisclosureFull P&L
Profit & loss
Revenue (turnover)£3.5m
Cost of sales−£371k
Gross profit£3.1m
Operating profit−£1.8m
Profit before tax−£5.2m
Profit after tax−£5.2m
Profit (best available)−£5.2m
Employees (average)—
Ratios
Profit margin−148.2%
Gross margin89.4%
Balance sheet — indirect signals, not revenue
Net assets—
SourceAccounts · bulk data Jul 2026
Derived from the latest filing

How the business works

Profit margin
−148.2%
Profit ÷ revenue.
Gross margin
89.4%
Gross profit ÷ revenue. High for software and services.
Revenue per employee
—
Revenue ÷ average employees.
Profit per employee
—
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
—
Now —
Cash at bank
—
Now —
Headcount
—
Now —
Deferred income
—
Now —
Fixed assets
—
Now —
Corporate ownership

Group structure

Ownership chain

  1. Gresham House Energy Storage Fund PLCultimate parent75–100%
  2. Gresham House Energy Storage Holdings Limited75–100%
  3. Grid Holdco 1 Limited75–100%
  4. Penwortham Storage Limitedthis company

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

Sister companies (23)

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 accounts for the year to 31 Dec 2025 (profit −£5.2m), from the Companies House accounts bulk data published Jul 2026. Spotted an error? Request a correction.

Updated from Companies House on 12 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.