Plexus was established in 1980 as a Wisconsin corporation. Since 1999, Plexus has completed nine acquisitions to expand its design, engineering and manufacturing capabilities. These include selected operations of MCMS, Qtron, e2E, Keltek (Holdings), electronics manufacturing operations of Elamex, Agility, the printed circuit board operations of Intermec Technologies and of Shure, and SeaMED. Plexus' customers include both original equipment manufacturers, or OEMs, and emerging technology companies. These customers range from large multinational companies to smaller emerging technology companies, including start-ups. Plexus markets its services primarily through its own sales and marketing organization of approximately 70 people. Plexus has a number of subsidiaries. The first of these is Plexus Services, a Nevada corporation, which in turn owns the subsidiaries Plexus Electronic Assembly, Plexus Technology Group, and Plexus NPI Plus (being merged into Plexus Electronic Assembly). And Plexus Electronic Assembly again owns the subsidiaries Plexus International Sales and Logistics, Plexus QS, Plexus Nampa, and four Mexican subsidiaries. The second direct subsidiary of Plexus is Plexus International Services, comprised of Plexus Corp. (UK), Plexus Technology Group, Plexus International, and Plexus Asia, a British Virgin Islands corporation, which in turn owns a Chinese and a Malaysian subsidiary. The remaining direct subsidiaries of Plexus are QTRON, Plexus ABS, PTL Information Technology Services, and Plexus Property Holding, all of which are based in the US.