Loading the map…

Activities of head offices · London

Diploma

Diploma PLC

ActiveLatest figures: 2025Group consolidated26 years on the register

Public limited company registered in London, classed under “Activities of head offices”.

Headline figures

FY to Sept 2025 · Group consolidated

Turnover

For subscribers

Profit after tax

£186m

Net assets

For subscribers

Cash

For subscribers

Employees

For subscribers

Retained reserves

For subscribers

What the numbers say

4 findings from the figures, in plain English

Written by rules from the figures on this page. Not a forecast or a credit opinion.

History

Pro
£202320242025
Profit after tax£186m
Turnover
Net assets
Cash
Employees
Retained reserves

Every figure for all 3 years

“—” means we did not find the figure in a source; it is never filled with an estimate.

Balance sheet and ratios

From the filed balance sheets · £

Balance sheet202320242025
Current assets
of which cash
Creditors due within a year
Creditors due after a year
Net assets
Ratios
Profit marginProfit after tax as a share of turnover
Return on equityProfit after tax as a share of net assets
Current ratioCurrent assets for every £1 owed within a year
Cash ratioCash for every £1 owed within a year

5 balance-sheet lines and 4 ratios, every year

A ratio appears only for years where every line it needs was filed. Lines are as tagged in the accounts; nothing is added up or estimated.

Timeline

Checked 2026-10-18

  1. Directors
    Termination of appointment of Geraldine Claire Huse as a director on 15 July 2026
  2. Directors
    Appointment of Ms Amanda Jane Gradden as a director on 1 June 2026
  3. Directors
    Appointment of Mrs Cheri Marie Phyfer as a director on 2 March 2026
  4. Filing
    Resolutions (and 14 more like it since 24 January 2013)
  5. Accounts
    Group of companies' accounts made up to 30 September 2025
  6. Directors
    Director's details changed for Janice Stipp on 29 December 2025
  7. Shares
    Statement of capital following an allotment of shares on 17 November 2025 · GBP 6,715,869.9 (and 5 more like it since 30 September 2020)
  8. Directors
    Appointment of Mr Wilson Ng as a director on 14 August 2025
  9. Directors
    Termination of appointment of Christopher Mark Davies as a director on 13 August 2025
  10. Directors
    Appointment of Anna Lawrence as a secretary on 30 May 2025
  11. Directors
    Termination of appointment of John Morrison as a secretary on 30 May 2025
  12. Accounts
    Group of companies' accounts made up to 30 September 2024
  13. 26 earlier
    1. Directors
      Appointment of Mr Ian Ramsey Safwat El-Mokadem as a director on 15 January 2025
    2. Directors
      Director's details changed for Mrs Geraldine Claire Huse on 22 November 2024
    3. Directors
      Appointment of Mrs Katie Bickerstaffe as a director on 1 October 2024
    4. Directors
      Termination of appointment of Anne Thorburn as a director on 30 September 2024
    5. Directors
      Termination of appointment of Andrew Patrick Smith as a director on 16 July 2024
    6. Directors
      Director's details changed for Mr Jonathan David Thomson on 26 March 2024
    7. Accounts
      Group of companies' accounts made up to 30 September 2023
    8. Directors
      Appointment of Janice Stipp as a director on 17 January 2024
    9. Directors
      Appointment of Ms Jennifer Suzanne Ward as a director on 1 June 2023
    10. Directors
      Director's details changed for Mrs Geraldine Claire Huse on 1 March 2020
    11. Accounts
      Group of companies' accounts made up to 30 September 2022
    12. Directors
      Appointment of Mr Christopher Mark Davies as a director on 1 November 2022
    13. Directors
      Termination of appointment of Barbara Gibbes as a director on 30 September 2022
    14. Directors
      Director's details changed for Mr Andrew Patrick Smith on 12 July 2022
    15. Accounts
      Group of companies' accounts made up to 30 September 2021
    16. Directors
      Termination of appointment of John Edward Nicholas as a director on 19 January 2022
    17. Address
      Registered office address changed from 12 Charterhouse Square, London, EC1M 6AX to 10-11 Charterhouse Square London EC1M 6EE on 5 January 2022
    18. Directors
      Appointment of Mr David Soutar Lowden as a director on 19 October 2021
    19. Directors
      Appointment of Mr Dean Kendal Finch as a director on 21 May 2021
    20. Accounts
      Group of companies' accounts made up to 30 September 2020
    21. Filing
      Memorandum and Articles of Association
    22. Directors
      Termination of appointment of Charles Max Packshaw as a director on 20 January 2021
    23. Directors
      Appointment of Mrs Barbara Gibbes as a director on 22 June 2020
    24. Directors
      Termination of appointment of Nigel Peter Lingwood as a director on 22 June 2020
    25. Directors
      Appointment of Mr John Morrison as a secretary on 5 May 2020
    26. Directors
      Termination of appointment of Anthony James Gallagher as a secretary on 5 May 2020

From the Companies House filing history. Routine confirmation statements are left out, and a run of the same filing is shown once.

Questions people ask

›What does Diploma do?

Public limited company registered in London, classed under “Activities of head offices”. In its own words: “Diploma PLC is a value-add solutions group, providing critical products and services for a wide range of uses to customers across many different markets.”

›How much turnover does Diploma make?

Answered in the full report

›Is Diploma profitable?

Yes: it made a profit after tax of £186m in the year to 30 September 2025, its latest filed accounts.

›Who runs and owns Diploma?

Its directors are Anna Lawrence, Katie Bickerstaffe, Ian Ramsey Safwat El-Mokadem, Dean Kendal Finch, Amanda Jane Gradden and 6 more. Its owners are shown to subscribers.

›Where is Diploma based?

Its registered office is 10-11 Charterhouse Square, London, EC1M 6EE, in London.

›When was Diploma founded?

Diploma PLC was incorporated on 24 December 1999.

›Is Diploma still trading?

The register lists Diploma PLC as active.

More companies in London →