Archived article
Please note that tax, investment, pension and ISA rules can change and the information and any views contained in this article may now be inaccurate.
Boring has been beautiful for shareholders of distributor Diploma

AJ Bell is an easy to use, award-winning platform Open an account
We've accounts to suit every investing need, and free guides and special offers to help you get the most from them.
You can get a few handy suggestions, or even get our experts to do the hard work for you – by picking one of our simple investment ideas.
All the resources you need to choose your shares, from market data to the latest investment news and analysis.
Funds offer an easier way to build your portfolio – we’ve got everything you need to choose the right one.
Starting to save for a pension, approaching retirement, or after an explainer on pension jargon? We can help.
Please note that tax, investment, pension and ISA rules can change and the information and any views contained in this article may now be inaccurate.
There is a lot to be said for being boring, especially when markets are volatile, and no firm quite captures that essence like FTSE 100 specialist distribution group Diploma (DPLM), whose shares have already sailed serenely to half a dozen all-time highs so far this year.
Diploma operates a decentralised model with three divisions: Controls, which supplies components including specialised wiring, Seals and Life Sciences, which includes consumables and instrumentation.
Over the last 15 years the group has grown EPS (earnings per share) at an average of 15% per year through a combination of organic (like-for-like) growth and acquisitions.
In the nine months to the end of June, the firm posted revenue growth of 13%, with organic, volume-led growth of 6% supplemented by 10% growth from acquisitions which was partly offset by a 3% currency headwind.
The firm said its strong third-quarter performance had continued into the final quarter meaning revenue and margins were in line with expectations.
Analysts are forecasting full-year revenue of £1.38 billion, an increase of just under 15% on last year, with operating profit of £283 million meaning a 20.5% margin compared with £237 million and 19.7% a year ago.
For September 2025, the consensus sees revenue rising around 11% to £1.53 billion and operating profit rising slightly faster to £318 million for a margin of 20.7%.
UK UPDATES OVER THE NEXT 7 DAYS
FULL-YEAR RESULTS
18 Nov: Diploma
19 Nov: Avon Technologies, Imperial Brands
20 Nov: Sage Group, Tracsis
21 Nov: Grainger
FIRST-HALF RESULTS
15 Nov: Land Securities, Volex
18 Nov: Big Yellow, Polar Capital, Sirius Real Estate
19 Nov: Calnex, CML Microsystems, GB, Gear4music, Manolete Partners, Mothercare, Revolution Beauty, Trifast, Vianet
20 Nov: Cropper, HICL Infrastructure
21 Nov: First Property, Halma, Jet2, Liontrust Asset Management, Norcros, Speedy Hire
TRADING ANNOUNCEMENTS
21 Nov: Breedon, Close Brothers, Restore
These articles are provided by Shares magazine which is published by AJ Bell Media, a part of AJ Bell. Shares is not written by AJ Bell.
Shares is provided for your general information and use and is not a personal recommendation to invest. It is not intended to be relied upon by you in making or not making any investment decisions. The investments referred to in these articles will not be suitable for all investors. If in doubt please seek appropriate independent financial advice.
Investors acting on the information in these articles do so at their own risk and AJ Bell Media and its staff do not accept liability for losses suffered by investors as a result of their investment decisions.
The value of your investments can go down as well as up and you may get back less than you originally invested. We don't offer advice, so it's important you understand the risks, if you're unsure please consult a suitably qualified financial adviser. Tax treatment depends on your individual circumstances and rules may change. Past performance is not a guide to future performance and some investments need to be held for the long term.