Diploma plc

Headquarters: London, United Kingdom

Founded: 1931

Employees: 2,505

CEO: Mr. Jonathan Thomson

show_chart LSE: DPLM -0.32%

Market Cap

£4.04 Billion

GBP as of July 1, 2023

US$5.13 Billion

history Market Cap History

Diploma plc market capitalization over time

Evolution of Diploma plc market cap in the past 5 years

Market capitalizations are calculated from the opening stock price at the beginning of each month.

history Market Cap History of Diploma plc

Detailed Description

Diploma PLC, together with its subsidiaries, supplies specialized technical products and services in the United Kingdom, rest of Europe, North America, and internationally. It operates through three business sectors: Life Sciences, Seals, and Controls. The Life Sciences sector supplies clinical diagnostics instrumentation and products, consumables, specialty surgical devices, and related consumables and services to public hospitals, private clinics, pathology laboratories, scientific research, and medical segments; surgical equipment for hospital operating rooms; and distributes laboratory diagnostics, specialty medical devices, devices, equipment, and patient monitoring technologies used in operating theatres, as well as medically supervised nutrition. It also provides supplies specialist containment solutions and analyzers for chemical, petrochemical, environmental research, and pharmaceutical technology. The Seals sector supplies various seals, gaskets, filters, cylinders, components, and kits used in heavy mobile machinery and specialized industrial equipment; and O-rings, custom molded and machined parts, fluid sealing products, and hydraulic cylinder components. The Controls sector offers cable identification, termination, and management products, and cable products; low voltage cables and cable management solutions; harness components and specialist connectors, including protective sleevings, cut-to-length tubing, kitting, connector assemblies, and prototype quantities of customized multi-core cables; fasteners and related technical support, and other value-added services for civil aerospace, motorsport, defense, and general industries, as well as supports customers with automated inventory replenishment solutions; fluid controllers, compressors, valves, temperature and pressure measurement devices, and liquid dispensing components; and silicones, adhesives, and sealants. Diploma PLC was incorporated in 1931 and is based in London, the United Kingdom.

Stocks & Indices

Diploma plc has the following listings and related stock indices.

Stock: LSE: DPLM

Stock: FSX: DP9

Key People

John Nicholas, Executive Chairman


Revenue: £787.4 million (2021)

Operating income: £104.3 million (2021)

Net income: £69.7 million (2021)



12 Charterhouse Square

London, EC1M 6AX

United Kingdom

Phone: 44 20 7549 5700

Fax: 44 20 7549 5715