1925	Setting up a machine shop by Paul Pleiger in Sprockhövel Manufacture of pneumatic cocks and valves for the mining industry
1934	Manufacture of pneumatic pumps for the mining industry Setting up a non-ferrous foundry in Herbede (Witten)
1937	Moving into a newly built machine factory in Herbede (Witten) , 375 employees
1952	Beginning of the manufacture of polyurethane cast elastomers (Vulkollan®)
1952	Formation of Paul Pleiger Handelsgesellschaft, Sprockhövel
1955	Manufacture of valves and cocks for coke ovens and automation
1957	Starting the extrusion of thermoplastics in a factory in Kiel
1958	Development of hydraulic components, manufacture of hydraulic radial piston motors and actuators
1966	Starting the commercial activities in electronics with products such as controllers, control systems, complete plant automations
1969	Building a new factory facility for processing of plastics in Raisdorf (Kiel)
1972	Changing the legal form of Paul Pleiger Maschinenfabrik into a limited partnership (KG)
1982	Beginning of the manufacture of centrifugal pumps for untreated waste water
1983	Accidental death of Dr. Paul Pleiger jun. Transformation of Paul Pleiger Maschinenfabrik KG into a GmbH & Co. KG
1985	Foundation of Pleiger Far East Co. Ltd., Pusan, Korea
1986	Foundation of Pleiger Plastics Company, Washington/PA, USA
1990	Divisionalizing of Paul Pleiger Maschinenfabrik GmbH & Co. KG 700 employees
1995	Foundation of Pleiger Kunststoff Technik GmbH & Co. KG, Buchholz (Hamburg) Takeover of the cast elastomer business of the companies Phönix AG and Martin Merkel GmbH & Co. KG
1996	Transforming the divisions of Paul Pleiger Maschinenfabrik GmbH & Co. KG into the following independent companies Pleiger Maschinenbau GmbH & Co. KG Pleiger Elektronik GmbH & Co. KG Pleiger Industrie-Kunststoffe GmbH & Co. KG Pleiger Thermoplast GmbH & Co. KG
1998	Starting developmental production of components for laser optics