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Company No. 00311333 · Incorporated 7 Mar 1936

Martin Secker and Warburg Limited

Registered name: MARTIN SECKER AND WARBURG LIMITED

Part of Bertelsmann UK Limited group

Martin Secker and Warburg Limited does not publish its revenue or profit. Its accounts to 31 Dec 2025 show net assets of £163k.

Martin Secker and Warburg Limited did not publish its revenue or profit — small companies aren’t required to file a profit & loss account. Its accounts for the year to 31 Dec 2025 showed net assets of £163k and 0 employees. The company is classified under “non-trading company” and is based in London; we hold 4 years of its filed accounts.

Balance sheet onlySIC 74990Non-trading company
Status
Active
Location
London
Age
90 yrs · since 1936
Type
Private Limited Company
Latest accounts · year to 31 Dec 2025

Key figures

Revenue not disclosed

Martin Secker and Warburg Limited’s accounts for the year to 31 Dec 2025 contain a balance sheet but no profit & loss account, so its revenue and profit are not public. UK small and micro-entity companies are not required to publish a P&L — this is normal and says nothing about how the business is performing.

We never estimate revenue. Below you’ll find the balance-sheet figures that were filed — useful as indirect signals of momentum, but they are not revenue or profit.

Employees
0
Net assets
£163k
4 filed years

Financial history

Multi-year financials, oldest to newest
Year to31 Dec 202231 Dec 202331 Dec 202431 Dec 2025
DisclosureNo P&LNo P&LNo P&LNo P&L
Profit & loss
Revenue (turnover)————
Profit (best available)————
Employees (average)0000
Ratios
Profit margin————
Balance sheet — indirect signals, not revenue
Net assets£163k£163k£163k£163k
Current assets£163k£163k£163k£163k
Debtors£163k£163k£163k£163k
SourceFullAccounts · bulk data Jun 2024FullAccounts · bulk data Jun 2024FullAccounts · bulk data Sep 2025FullAccounts · bulk data Aug 2026
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 £163k
Cash at bank
—
Now —
Headcount
—
Now 0
Deferred income
—
Now —
Fixed assets
—
Now —
Corporate ownership

Group structure

Ownership chain

  1. Bertelsmann UK Limitedultimate parent75–100%
  2. Penguin Random House Limited75–100%
  3. The Random House Group Limited75–100%
  4. Martin Secker and Warburg Limitedthis company

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

Sister companies (39)

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

Sources

Companies House profile Filing history & original accounts

Latest figures from FullAccounts for the year to 31 Dec 2025, from the Companies House accounts bulk data published Aug 2026. Spotted an error? Request a correction.

Updated from Companies House on 14 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.