How can I buy and sell Diploma shares?

Shares in Diploma PLC can be traded through most banks, building societies, stock brokers or “share shops”.

Our shares can also be traded through our registrars, Computershare Investor Services, via telephone by calling 0870 703 0084 on Monday to Friday between 8:00am and 4.30pm.

How do I transfer my shares?

If you want to transfer your shares to someone that you know, you can transfer your holding using a stock transfer form. Please download and complete the stock transfer form.

How do I contact the registrars?

For all enquiries concerning shares and/or dividend payments, please contact the registrars.

I have lost my share certificate(s), how do I obtain a replacement?

You should notify the registrars, either in writing or by telephone so that a restriction can be placed on your certificate in case of any attempted fraud. You will then be sent a letter of indemnity to complete and return to the registrars so that a replacement certificate can be issued. There is a charge for this service and for more information visit the FAQ section of the registrars’ website.

I have changed my address, who needs to know?

If you have registered for the online service provided by Computershare you can amend your address online. Otherwise you will need to complete a change of address  form or write a letter to the registrars which should include the following:

  • your name in full, as it appears on your share certificate(s)
  • your previous address
  • your new address
  • your shareholder account number

This letter must be signed. For security reasons the registrars cannot accept address changes over the telephone.

I have changed my name, what should I do?

You will need to complete a change of name  form or write a letter to the registrars which should include the following:

  • your old name in full, as it appears on your share certificate(s)
  • your new name
  • a copy of any legal documentation, such as marriage certificate, or deed poll

This letter must be signed. For security reasons the registrars cannot accept name changes over the telephone or online.

What are the procedures if a shareholder has passed away?

Please notify the registrars as soon as possible. For detailed information, visit the FAQ section of the registrars’ website.

What should I do if I receive unsolicited telephone calls and/or documents?

The Company is legally obliged to make its share register publicly available. Consequently some shareholders may receive unsolicited mail and/or calls.

Over recent years a number of companies have become aware that their shareholders have received unsolicited phone calls or correspondence concerning investment matters which imply a connection to the company concerned. These are typically from overseas based ‘brokers’ who target UK shareholders offering to sell them what often turn out to be worthless or high risk shares in US or UK investments. They can be very persistent and extremely persuasive and a 2006 survey by the Financial Conduct Authority (FCA) has reported that the average amount lost by investors is around £20,000. It is not just the novice investor that has been duped in this way; many of the victims had been successfully investing for several years. Shareholders are advised to be very wary of any unsolicited advice, offers to buy shares at a discount or offers of free reports into the company.

If you receive any unsolicited investment advice:

  • Make sure you get the correct name of the person and organisation and make a record of any other information they give you, e.g. telephone number, address etc
  • Check that they are properly authorised by the FCA before getting involved. You can check at
  • The FCA also maintains on its website a list of unauthorised overseas firms who are targeting, or have targeted, UK investors and any approach from such organisations should be reported to the FCA so that this list can be kept up to date and any other appropriate action can be considered. If you deal with an unauthorised firm, you would not be eligible to receive payment under the Financial Services Compensation Scheme. The FCA can be contacted by completing an online form at or 0845 606 1234.
  • Inform our registrars on 0870 707 1606. They are not able to investigate such incidents themselves but will record the details and pass them on to Diploma PLC and liaise with the FCA.

More detailed information on this or similar activity can be found on the FCA website.

Can I receive my shareholder documents electronically?

Yes. Sign in or Register at Investor Centre. Once logged in, to add your email address select the tab 'Update My Details' followed by the option 'Communications Options'. Then follow the onscreen instructions.

What is the 1982 value of Diploma PLC shares for UK Capital Gains Tax purposes?

For UK Capital Gains Tax purposes, the 31 March 1982 value for ordinary shares held at 31 March 1982 was 23.42p. If you require assistance with your Capital Gains Tax calculations, please contact your professional adviser or accountant.

What is the Share Capital history?


Share Capital

Diploma PLC has an issued share capital of 113, 239,555 ordinary shares of 5 pence each and has a Premium Listing on the London Stock Exchange. The rights attaching to the Company’s ordinary shares as well as the powers of the Company’s Directors, are set out in the Company’s Articles of Association.

2008 - Bonus Issue of four shares for every one share held

On 21 January 2008, the authorised share capital of the Company was increased by the creation of an additional 100,000,000 Shares of 5 pence each in the capital of the Company, such Shares forming one class with the existing ordinary Shares having attached thereto the respective rights and privileges and being subject to the limitations and restrictions set out in the articles of association of the Company. At the same time the Company capitalised £4,353,578, being part of the amount standing to credit of the Company’s profit and loss account reserve, together with £176,004, being the amount standing to the credit of the capital redemption reserve, as permitted by the Company’s Articles of Association.

On completion of these transactions, the Directors applied this sum in paying up in full at par 90,591,644 new ordinary Shares of 5 pence each, and credited as fully paid up, to the holders of ordinary Shares whose names were entered on the register of members at close of business on 18 January 2008 in the proportion of four ordinary Shares for each ordinary share held by them, such new ordinary Shares to rank in all respects pari passu with such of the existing issued ordinary Shares as were fully paid (save that they did not so rank for the final dividend of the Company declared in respect of the year ended 30 September 2007.

2000 - Capital Reorganisation

On 18 April 2000, the Company effected a capital reorganisation by a scheme of arrangement, where for every two Diploma shares, the holder received £2.00 in cash plus one New Share of 5 pence each. The Company’s Brokers at that time, Deutsche Bank, advised that the weighted average price of shares on 18 April 2000 was 205.42p.