How much does Diamond Box Limited make?

Diamond Box Limited reported revenue of £46.1m and a loss of £1.5m in the year to 31 Mar 2025, according to its accounts filed at Companies House.

How many employees does Diamond Box Limited have?

Diamond Box Limited reported an average of 173 employees in the year to 31 Mar 2025.

Is Diamond Box Limited profitable?

No — Diamond Box Limited reported a loss of £1.5m in the year to 31 Mar 2025.

Company No. 06423200 · Incorporated 9 Nov 2007

Diamond Box Limited

Registered name: DIAMOND BOX LIMITED

Diamond Box Limited made £46.1m revenue and a £1.5m loss in the year to 31 Mar 2025.

Diamond Box Limited’s revenue grew 15% to £46.1m in the year to 31 Mar 2025, with a loss of £1.5m and 173 employees. The company is classified under “manufacture of corrugated paper and paperboard, sacks and bags” and is based in West Bromwich; we hold 2 years of its filed accounts.

Full P&L filedSection C · ManufacturingSIC 17211Manufacture of corrugated paper and paperboard, sacks and bags SIC 17219Manufacture of other paper and paperboard containers

Status: Active
Location: West Bromwich, West Midlands
Age: 18 yrs · since 2007
Type: Private Limited Company

Latest accounts · year to 31 Mar 2025

Key figures

IndependentCash flow filed

Revenue

£46.1m

Growth ▲14.6%

Profit

−£1.5m

Growth ▼589.1%

Profit margin

−3.2%

Gross 21%

Employees

173

Change ▲20.1%

Profit / employee

−£8.4k

Revenue/employee £267k

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.

2 filed years

Financial history

Multi-year financials, oldest to newest
Year to	31 Mar 2024	31 Mar 2025
Disclosure	Full P&L	Full P&L
Profit & loss
Revenue (turnover)	£40.2m	£46.1m
Cost of sales	£30.5m	£36.4m
Gross profit	£9.7m	£9.7m
Operating profit	£1.3m	−£1.1m
Profit before tax	£597k	−£2m
Profit after tax	£299k	−£1.5m
Profit (best available)	£299k	−£1.5m
Staff costs	£6.6m	£8m
Employees (average)	144	173
Ratios
Profit margin	0.7%	−3.2%
Gross margin	24.1%	21%
Revenue per employee	£279k	£267k
Profit per employee	£2.1k	−£8.4k
Cash conversion	−272.4%	—
Growth (year on year)
Revenue growth	—	▲14.6%
Profit growth	—	▼589.1%
Headcount growth	—	▲20.1%
Balance sheet — indirect signals, not revenue
Cash at bank	£182k	£202k
Net assets	£3.2m	£1.4m
Fixed assets	£10.6m	£10.6m
Current assets	£14.7m	£17.7m
Debtors	£9m	£10.6m
Cash from operations	−£3.7m	−£2.6m
Source	FullAccounts · bulk data Mar 2026	FullAccounts · bulk data Mar 2026

Derived from the latest filing

How the business works

Profit margin: −3.2%; Profit ÷ revenue.
Gross margin: 21%; Gross profit ÷ revenue. High for software and services.
Revenue per employee: £267k; Revenue ÷ average employees.
Profit per employee: −£8.4k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: 22.9%; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: —; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: 22.9%; 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: ▼56%; Now £1.4m
Cash at bank: ▲11%; Now £202k
Headcount: ▲20%; Now 173
Deferred income: —; Now —
Fixed assets: ▼0%; Now £10.6m

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Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Mar 2025 (profit −£1.5m), 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.