Diploma | Sustainability & Chart

GB0001826634

Basic information on Diploma

Location: United Kingdom

Industry: Professional & Technical Services

Website

Impact Score

Description Diploma

Diploma Plc is an international group focused on providing specialized technical products and services within the life sciences, seals, fluid control, and controls sectors.

Diploma Sustainability Performance

Climate

64%

Renewable Energy

Diploma obtains 51% of its energy from renewable energies. Target value per method: min. 100%

Greenhouse Gas Emissions

Diploma emits 54% of its CO₂ budget of 16,476 tons of CO₂ equivalent. Target value per method: max. 100% of CO₂ budget

Supply Chain

Taking into account the entire supply chain, Diploma emits 16,9 times its CO₂ budget of 16,476 tons of CO₂ equivalent. Target value per method: max. 100% of CO₂ budget

Recycling and Recovery of Waste

Diploma recycles 74% of its waste. Target value per method: min. 75%

Society

42%

Union Formation and Collective Bargaining Power

No data available for Diploma. Target value per method: min. 80%

CEO Pay Ratio

CEO Johnny Thomson earns 191 times the median salary of employees. Target value per method: max. 30 times

Employee Turnover Rate

Diploma has an employee turnover rate of 20%. Target value per method: max. 10%

Harassment and Discrimination at the Workplace

Diploma meets 4 quality criteria for handling harassment and discrimination at the workplace. Target value per method: 4 quality criteria

Gender

72%

Women on Board

Diploma has 35% women across its top leadership and supervisory bodies. Target value per method: min. 40%

Gender Pay Gap

No data available for Diploma. Target value per method: max. 3%

Women in Management

Diploma employs 40% female managers. Target value per method: min. 40%

Glass Ceiling

The proportion of women in senior management at Diploma is 125% of the proportion of women in the overall workforce. Target value per method: min. 90%

Sustainable [100]

Almost sustainable [67-99]

Moderate [34-66]

Not sustainable [0-33]

No data

Renewable Energy

Greenhouse Gas Emissions

Supply Chain

Waste Recycling

Sustainable [100]

Almost sustainable [67-99]

Moderate [34-66]

Not sustainable [0-33]

No data

We measure the sustainability of companies based on 12 criteria.Indicators range from 0 to 100: values from 0 to 33 are shown in red (“not sustainable”), values from 34 to 66 in yellow (“moderate”), values from 67 to 99 in light green (“almost sustainable”), and a value of 100 in green (“sustainable”). Learn more about our method.

Compare Diploma with ...

Diploma

?

Impact Score

Climate

Society

Gender

64%

42%

72%

Diploma

?

Impact Score

Climate

Society

Gender

Sources of sustainability performance

Metric	Value	Unit	Year	PDF Name	PDF Page
CEO Pay Ratio
CEO-to-median-salary-ratio	191	Ratio	2025	diploma-plc-annual-report-and-accounts-2025.pdf	96
CEO name	Johnny Thomson		2025	diploma-plc-annual-report-and-accounts-2025.pdf	10
Employee Turnover Rate
Employee turnover	20	%	2025	diploma-plc-annual-report-and-accounts-2025.pdf	41
Glass Ceiling
Women in management	40	%	2025	diploma-plc-annual-report-and-accounts-2025.pdf	15
Women in workforce	32	percentage	2025	diploma-plc-annual-report-and-accounts-2025.pdf	15
Greenhouse Gas Emissions
Number of employees	3 390	people	2025	diploma-plc-annual-report-and-accounts-2025.pdf	120
Scope 2 emissions, location based	5 213	(tonnes CO2e)	2025	diploma-plc-annual-report-and-accounts-2025.pdf	43
Scope 1 emissions	3 732	(tonnes CO2e)	2025	diploma-plc-annual-report-and-accounts-2025.pdf	43
Harassment and Discrimination at the Workplace
Incident notification mechanism	Yes		2025	external-code-of-conduct-70.pdf	5
Anti-discrimination policy	Yes		2025	external-code-of-conduct-70.pdf	7
Retaliation safeguards	Yes		2025	external-whistleblowing-policy.pdf	6
Confidentiality mechanisms	Yes		2025	external-whistleblowing-policy.pdf	6
Renewable Energy
Total renewable energy consumption	51	%	2024	diploma-2024-annual-report.pdf	55
Supply Chain
Number of employees	3 390	people	2025	diploma-plc-annual-report-and-accounts-2025.pdf	120
Scope 2 emissions, location based	5 213	(tonnes CO2e)	2025	diploma-plc-annual-report-and-accounts-2025.pdf	43
Scope 1 emissions	3 732	(tonnes CO2e)	2025	diploma-plc-annual-report-and-accounts-2025.pdf	43
Scope 3 emissions	269 863	(tonnes CO2e)	2025	diploma-plc-annual-report-and-accounts-2025.pdf	43
Recycling and Recovery of Waste
Waste recycled	74	%	2025	diploma-plc-annual-report-and-accounts-2025.pdf	43
Women on Board
Executive board size	10	people	2025	diploma-plc-annual-report-and-accounts-2025.pdf	74
Women on executive board	3	people	2025	diploma-plc-annual-report-and-accounts-2025.pdf	74
Supervisory board size	10	people	2025	diploma-plc-annual-report-and-accounts-2025.pdf	62
Women on supervisory board	44,4	%	2025	diploma-plc-annual-report-and-accounts-2025.pdf	58
Women in Management
Women in management	40	%	2025	diploma-plc-annual-report-and-accounts-2025.pdf	15

Note: The PDF pages given here refer to the page in the PDF document, which is not necessarily the one found in the footer of the page. For example, page 10 is the 10th page in the document, even if it is labeled as page 8.

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Diploma | Sustainability & Chart

Basic information on Diploma

Description Diploma

Diploma Sustainability Performance

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Diploma

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Sources of sustainability performance

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