Diploma Results Presentation Deck

21 Diploma PLC Half Year 2022 Results Seals Revenue £137.4m +15% underlying +11% y/y Operating profit £25.8m +25% y/y Margin: 18.8% +210bps North American Seals: Underlying growth 19% • Accelerated Aftermarket growth ● International Seals: Underlying growth 8% after a resilient 2021 • Well diversified end market exposure ● Margin +210 bps: Significant step up in Aftermarket margin as expected Louisville: dual running costs end • Positive operating leverage Disposal of Kentek is margin accretive ● ● DIPLOMA PLC

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