Diploma Results Presentation Deck

28 Diploma PLC Half Year 2022 Results Sector revenue and profit Half Year ended 31 March Controls Seals Life Sciences Group Controls Seals Life Sciences Central costs Group H1 2022 £m 224.0 137.4 87.1 448.5 Revenue H1 2022 £m 47.0 25.8 19.6 (9.9) 82.5 H1 2021 £m 152.8 123.8 88.6 365.2 Change +47% +11% (2)% Adjusted operating profit H1 2021* £m 31.2 20.7 21.3 (6.6) 66.6 +23% Change +51% +25% (8)% +50% +24% Underlying growth H1 2022 % +28% +15% (7)% +16% * Re-presented to show central corporate costs separately in line with current year presentation H1 2022 % 21.0 18.8 22.5 H1 2021 % Adjusted operating margin H1 2021* % 20.4 16.7 24.0 18.4 (1)% (2)% +14% +2% 18.2 Change +60bps +210bps (150)bps +20bps DIPLOMA PLC

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