Diploma PLC (LSE:DPLM) has upgraded its full-year guidance after delivering another strong quarter, supported by double-digit organic growth and the completion of a strategic acquisition in the United States. The company reported continued strength across its Controls division, improving trends in Seals, and resilient demand in Life Sciences despite mixed market conditions.
Strong trading supports higher guidance
Organic revenue increased 15% during the third quarter, extending the momentum established in the first half of the financial year. Controls remained the standout performer, while Seals recorded a modest improvement and Life Sciences continued to perform steadily despite more challenging end markets.
Diploma also completed the acquisition of CDM, strengthening its position in the US interconnect market with a platform focused primarily on the defence sector. The deal expands the group’s presence in an attractive niche and supports its long-term acquisition strategy.
Reflecting the strong performance, the company now expects full-year organic revenue growth of approximately 14%, an operating margin of around 26.5%, and operating profit growth of roughly 42%. The revised guidance represents another upgrade to market expectations and highlights the group’s confidence in its trading outlook, acquisition pipeline and financial flexibility.
Growth strategy continues to deliver
The latest update demonstrates the strength of Diploma’s model of combining sustained organic expansion with carefully selected acquisitions. Businesses including IS Group, Clarendon, Peerless and Windy City Wire all delivered double-digit growth, reinforcing the company’s ability to generate consistent performance across its portfolio.
Management also pointed to favourable trading conditions within Controls and resilient demand across the wider business, giving investors greater confidence that earnings momentum can continue while the company pursues further acquisition opportunities supported by a strong balance sheet.
Investment outlook
Diploma’s latest trading update reflects a business benefiting from robust revenue growth, expanding margins and healthy cash generation. The upgraded guidance and continued operational execution provide additional confidence in the group’s earnings trajectory, while its active acquisition strategy remains a key driver of long-term growth.
Although the shares continue to trade on a relatively demanding valuation with a high price-to-earnings multiple and a modest dividend yield, the company’s consistent execution and positive trading momentum help support its premium rating.
About Diploma
Diploma PLC is an international value-added distribution group supplying specialised products and services across a wide range of industries. Operating throughout the US, Canada, the UK, Europe and Australia, the FTSE 100 company employs around 3,500 people. Over the past five years, it has delivered average adjusted earnings per share growth of approximately 26% annually through a combination of organic expansion and strategic acquisitions.









