Better Health for All

The company has undertaken significant mitigation efforts for health-harming externalities. It reduced Scope 1 and 2 emissions by 38% in FY25 against an FY22 baseline, with 82% of its electricity now sourced from renewable sources.

Additionally, waste sent to landfill was reduced to 18% in FY25 from 23% in FY24, and 76% of its businesses now send less than 15% of their waste to landfill.

Fair Money & Economic Opportunity

Diploma PLC is a global group supplying specialized technical products and services across Life Sciences, Seals, and Controls sectors.

The company's core business is not in financial services, lending, or consumer credit. Therefore, the majority of the KPIs under the 'Fair Money & Economic Opportunity' value, which are designed to assess financial institutions' impact on financial inclusion and economic opportunity for marginalized populations, are not applicable to Diploma PLC's operations. The company does not offer lending or deposit services to consumers, nor does it provide financial products requiring APRs, fee structures, or financial literacy programs.

Fair Trade & Ethical Sourcing

90% of key suppliers are aligned to the Supplier Code, which accounts for approximately 54% of total Group supplier spend.

This alignment is verified by internal audits to ensure compliance and accountability, and the Code sets minimum standards on ethics, compliance, and working practices, including the prohibition of forced and child labor. No incidents of non-compliance with the Group’s Modern Slavery policies have been identified to date. The company has also introduced new supply chain sustainability software to assess supplier risk levels, combining external data with supplier self-assessments to identify human rights risks.

Honest & Fair Business

Diploma PLC maintains a comprehensive Whistleblowing Policy, published May 2025

and reviewed annually . It features a 24/7 confidential, independently managed hotline (Safecall) available in multiple languages , allowing for anonymity . The policy is displayed in all business locations , protects against retaliation , and allows external reporting . An Oversight Committee, including Internal Audit, Group General Counsel, and Group CFO, oversees investigations . Internal Audit monitors and reports on the policy , while External Audit reviews the framework and samples investigation outcomes . The company also has a comprehensive Anti-Bribery & Corruption Policy, published July 2024 and reviewed annually . This policy applies globally to the entire group and third parties , adopting a zero-tolerance stance towards bribery, corruption, and facilitation payments (with a safety exception) . It complies with the UK Bribery Act 2010 , includes mandatory training , and requires due diligence for third parties in higher-risk markets, with anti-bribery clauses in contracts . Internal Audit monitors its effectiveness .

Planet-Friendly Business

Diploma PLC has SBTi-validated net-zero targets for 2045, including interim goals to reduce Scope 1 and 2 emissions by 50% and Scope 3 emissions by 30% by 2030 from a FY22 baseline.

The company has published progress, with FY25 Scope 1 and 2 emissions at 4,776 tonnes CO2e, down from the FY22 baseline of 7,489 tonnes CO2e. As of FY25, 82% of its electricity is sourced from renewables, a significant increase from 1% in FY23. The company achieved an 82% waste diversion rate in FY25 (18% waste to landfill) and reported a 74% recycling rate. Its climate-related disclosures are prepared in line with the TCFD framework and comply with UK CRFD, incorporating qualitative scenario analysis. No environmental compliance violations were reported.

Respect for Cultures & Communities

No direct evidence was found in the provided articles that explicitly addresses the specific quantitative or qualitative criteria for any of the KPIs under the 'Respect for Cultures & Communities' ethical value. While one article mentions an investment of £500,000 into community engagement projects supporting local educational programs.

, this is not presented as a percentage of revenue or specifically for cultural heritage organizations. Similarly, a 98% completion rate for ethics training in 2023 is noted , but this is not explicitly defined as cultural sensitivity training.

Zero Waste & Sustainable Products

The company achieved an 82% waste diversion rate in FY25, with 18% of waste sent to landfill.

It has set a target to reduce waste to landfill to less than 15% by FY30. The company implements several waste reduction initiatives, including increased recycling, improved waste management processes, reducing packaging, establishing partnerships with charities to recycle previously unrecyclable materials, and an internal global network for sharing best practices. External waste audits have been conducted for a second year. The company's Supplier Code of Conduct, which includes waste reduction requirements, is aligned with 89% of its key suppliers.