Plexus Holdings plc, founded in 1985 and headquartered in Worthing, United Kingdom, develops and provides specialised wellhead systems, valves, trees and associated equipment and services for the oil and gas sector, primarily leveraging its patented POS-GRIP friction-grip technology and HG metal-to-metal sealing systems. The company offers surface wellheads, tubing spools, subsea wellheads including the Python subsea system, production trees, gate valves, actuators, connectors under POS-SPEED and POS-SET brands, POS-GRIP crown plugs, lateral trees and mudline suspension equipment; it serves exploration drilling from jack-up rigs, plug and abandonment, surface production, subsea, gas storage, geothermal, carbon capture, storage and hydrogen applications for offshore operators worldwide, with key revenue from the United Kingdom, United States and rest of world markets, including rentals, sales and project engineering support. Operations focus on high-pressure/high-temperature environments and emphasise leak-free, gas-tight performance to enhance safety, reduce maintenance costs by up to 70% and support net-zero emissions goals through methane leak prevention. Recent developments include a US$5.2 million intellectual property licence agreement with SLB in 2024 replacing a prior surface production wellhead licence, granting perpetual royalty-free rights to POS-GRIP and HG seal technologies for non-core applications; expansion of an existing Cameron (SLB) licence originally signed in 2020 to broaden POS-GRIP technology use; a proposed placing, subscription and retail offer to raise funds; and a leadership transition with Craig Hendrie appointed chief executive officer in mid-2024. Subsidiaries such as Plexus Ocean Systems Ltd support manufacturing and marketing, with licences granted to partners including TechnipFMC, SLB and Gusar for specific global applications.