Diploma Results Presentation Deck

23 Diploma PLC Half Year 2023 Results Delivering Value Responsibly (DVR) 8 DECENT WORK AND ECONOMIC GROWTH GOOD HEALTH AND WELL-BEING 8 DECENT WORK AND ECONOMIC GROWTH M Health & Safety Our mission is to keep everyone safe and well with the support of a strong health & safety culture. Colleague Engagement Our mission is to retain great talent and drive performance by engaging colleagues throughout the Group. 5 QUALITY REDUCED INEQUALITIES € Diversity, Equity & Inclusion Our mission is for all our colleagues to feel able to bring their full selves to work, fulfil their potential and benefit from working as part of a diverse team. Delivering Value Responsibly DECENT WORK AND ECONOMIC GROWTH Positive Impact Revenue Positioning ourselves for commercial growth with a positive impact on society and the environment 10 REDUCED Supply Chain Our mission is to ensure an ethical and resilient supply chain that underpins value for our customers. NEQUALITIES 13 CLIMATE ACTION Environment Our mission is to be a growing business with a shrinking environmental impact. 13 CUMATE ACTION Significant commercial potential Building momentum • Performance plans in place and delivering improvements • Net zero plans submitted to SBTI (2045 across full value chain) Huge positive impact opportunity • New Sustainability Director DIPLOMA PLC

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