Diploma lifts full-year guidance after strong first half and acquisition-led growth

An update from Diploma ( (GB:DPLM) ) is now available.

Diploma reported a strong first-half performance for the six months to 31 March 2026, with revenue up 17% to £851.1m and organic revenue growth accelerating to 15%. Adjusted operating profit rose 33% to £208.9m, lifting the adjusted operating margin by 300 basis points to 24.5%, while adjusted earnings per share increased 36% and returns on adjusted trading capital employed reached 22.7%.

The company signalled continued momentum by upgrading its full-year 2026 guidance, now targeting 12% organic revenue growth and a total 6% contribution from acquisitions, implying adjusted operating profit growth of over 30%. Diploma completed or agreed 15 deals over the last 12 months for around £310m, including a sizeable U.S. defence interconnect acquisition, while maintaining leverage at 0.8x and declaring a 5% higher interim dividend, underscoring confidence in its cash generation and balance sheet strength.

Sector performance was mixed but overall positive, with the Controls division achieving 26% organic growth on strong demand in aerospace, defence, data centres and energy, while Seals grew 2% and Life Sciences 4% amid tougher market conditions. Management highlighted a healthy acquisition pipeline, resilient diversified portfolio and robust second-half trading start, reinforcing its strategy of combining ambitious earnings growth with disciplined returns despite a more uncertain macroeconomic environment.

The most recent analyst rating on (GB:DPLM) stock is a Hold with a £5760.00 price target. To see the full list of analyst forecasts on Diploma stock, see the GB:DPLM Stock Forecast page.

Spark’s Take on DPLM Stock

According to Spark, TipRanks’ AI Analyst, DPLM is a Outperform.

The score is driven primarily by strong financial performance (growth, improving margins, and robust free cash flow) and supportive technical momentum. Corporate events are generally favorable with upgraded outlook and strong trading, though governance-related shareholder pushback adds some risk. The main constraint is valuation, with a high P/E and modest yield.

To see Spark’s full report on DPLM stock, click here.

More about Diploma

Diploma PLC is a value-add solutions group supplying critical products and services across diverse markets, with operations spanning the U.S., Canada, the UK, Europe and Australia. The FTSE 100 company employs around 3,400 people and has built a track record of “sustainable quality compounding,” growing adjusted earnings per share by about 26% annually over the past five years through a mix of organic expansion and acquisitions.

The group focuses on specialised businesses in sectors such as controls, seals and life sciences, positioning itself in structurally growing end markets including aerospace, defence, data centres, energy infrastructure and healthcare. Its model emphasises differentiated, value-added distribution and disciplined capital allocation to deliver strong returns on invested capital for shareholders.

Average Trading Volume: 533,413

Technical Sentiment Signal: Buy

Current Market Cap: £9.01B

Learn more about DPLM stock on TipRanks’ Stock Analysis page.