Diploma PLC, trading as DPLMF on the OTC Market, is a UK-based international distributor of specialized technical products and services. The company serves regulated industries—including energy, infrastructure and healthcare—through the distribution of engineered consumables, instrumentation and related services. Operating across three core segments—Controls, Seals and Life Sciences—Diploma supplies O-rings, seals, gaskets, precision instruments, fluid control components and laboratory consumables designed to meet stringent performance standards.
Each segment is tailored to specific end-market needs. The Controls division focuses on electromechanical and instrumentation solutions for process control applications. Seals specialises in fluid power, hydraulic and pneumatic sealing products, delivering mission-critical sealing solutions for industrial machinery. The Life Sciences arm offers laboratory and process consumables, safety equipment and cleanroom products to pharmaceutical, biotechnology and healthcare customers.
Founded in the mid-1960s and headquartered in London, Diploma has expanded through a combination of organic growth and targeted acquisitions. Today, the Group operates in more than 30 countries across Europe, North America, Asia and Australasia, supported by a global network of technical sales and service teams. With a commitment to quality assurance, strong manufacturer partnerships and customer service excellence, Diploma continues to pursue sustainable growth in its core markets.
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