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Diploma Plc

Diploma Plc is an active company incorporated on 24 December 1999 with the registered office located in London, Greater London. Diploma Plc was registered 26 years ago.
Status
Active
Active since incorporation
Company No
03899848
Public limited company
Age
26 years
Incorporated 24 December 1999
Size
Large
Turnover is over £54M
Balance sheet is over £27M
Over 250 employees
Confirmation
Submitted
Dated 22 December 2025 (1 month ago)
Next confirmation dated 22 December 2026
Due by 5 January 2027 (11 months remaining)
Last change occurred 2 years 1 month ago
Accounts
Submitted
For period 1 Oct30 Sep 2024 (1 year)
Accounts type is Group
Next accounts for period 30 September 2025
Due by 31 March 2026 (2 months remaining)
Contact
Address
10-11 Charterhouse Square
London
EC1M 6EE
England
Same address for the past 4 years
Telephone
02075495700
Email
Unreported
People
Officers
10
Shareholders
1
Controllers (PSC)
-
Director • British • Lives in England • Born in Jul 1966
Director • Malaysian • Lives in England • Born in Sep 1981
Director • American • Lives in England • Born in Sep 1973
Director • British • Lives in England • Born in Feb 1968
Director • British • Lives in England • Born in Aug 1957
Shareholders, PSCs & Group Structure
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Mutual Companies
Diploma Holdings Plc
Wilson NG and Jonathan David Thomson are mutual people.
Active
Morgan Sindall Group Plc
David Soutar Lowden is a mutual person.
Active
Barratt Redrow Plc
Katie Bickerstaffe is a mutual person.
Active
Newlandglebe Limited
Wilson NG is a mutual person.
Active
Charles Church Developments Limited
Dean Kendal Finch is a mutual person.
Active
Persimmon Public Limited Company
Dean Kendal Finch is a mutual person.
Active
Serco Group Plc
Ian Ramsey Safwat El-Mokadem is a mutual person.
Active
Capita Plc
David Soutar Lowden is a mutual person.
Active
Financials
Net Assets, Total Assets & Total Liabilities (2016–2025)
Period Ended
30 Sep 2025
For period 30 Sep30 Sep 2025
Traded for 12 months
Cash in Bank
£81.7M
Increased by £26.2M (+47%)
Turnover
£1.52B
Increased by £161.1M (+12%)
Employees
3.38K
Decreased by 64 (-2%)
Total Assets
£1.81B
Increased by £37.3M (+2%)
Total Liabilities
-£819.7M
Decreased by £64.4M (-7%)
Net Assets
£989.7M
Increased by £101.7M (+11%)
Debt Ratio (%)
45%
Decreased by 4.59% (-9%)
Latest Activity
Confirmation Submitted
21 Days Ago on 31 Dec 2025
Janice Stipp Details Changed
23 Days Ago on 29 Dec 2025
Mr Wilson Ng Appointed
5 Months Ago on 14 Aug 2025
Christopher Mark Davies Resigned
5 Months Ago on 13 Aug 2025
Anna Lawrence Appointed
7 Months Ago on 30 May 2025
John Morrison Resigned
7 Months Ago on 30 May 2025
Group Accounts Submitted
12 Months Ago on 23 Jan 2025
Mr Ian Ramsey Safwat El-Mokadem Appointed
1 Year Ago on 15 Jan 2025
Confirmation Submitted
1 Year Ago on 27 Dec 2024
Mrs Geraldine Claire Huse Details Changed
1 Year 2 Months Ago on 22 Nov 2024
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Documents
Confirmation statement made on 22 December 2025 with no updates
Submitted on 31 Dec 2025
Director's details changed for Janice Stipp on 29 December 2025
Submitted on 29 Dec 2025
Statement of capital following an allotment of shares on 17 November 2025
Submitted on 1 Dec 2025
Appointment of Mr Wilson Ng as a director on 14 August 2025
Submitted on 14 Aug 2025
Termination of appointment of Christopher Mark Davies as a director on 13 August 2025
Submitted on 14 Aug 2025
Termination of appointment of John Morrison as a secretary on 30 May 2025
Submitted on 30 May 2025
Appointment of Anna Lawrence as a secretary on 30 May 2025
Submitted on 30 May 2025
Resolutions
Submitted on 24 Jan 2025
Group of companies' accounts made up to 30 September 2024
Submitted on 23 Jan 2025
Appointment of Mr Ian Ramsey Safwat El-Mokadem as a director on 15 January 2025
Submitted on 15 Jan 2025
Repayment History
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