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About ista History
ista - A name and a claim to which we are committed
The history of our company goes back 100 years to the foundation of CLORIUS and ISTA, the Danish and German pioneers of consumption-based billing of energy and water. Since then, these two pioneering companies have advanced to become market leaders in many countries.
Our expertise and our experience which are key to ista's success have their roots in this tradition. High-quality, durable products, a wide range of services, a closely knit network of locations, a reliable delivery service and the competent, friendly advice our well-trained staff give our customers - that's why today the name ista stands for outstanding quality in the field of metering services, especially in Germany, and our "istameter" has virtually become a synonym for water meters.
2007
The fonds advised by the british financial investor Charterhouse Capital Partners buy ista from CVC.
2006
Largest acquisition in company history: ista has taken over the French market leader Comptage Immobilier Services (CIS) and becomes the undisputed No. 1 in Europe as well.
2005
Viterra Energy Services changes its name to ista.
The acquisition of USI Energy Inc. makes ista the market leader in the USA. ista also becomes the No. 1 in Belgium following the purchase of the two companies, ISTA Belgien SA and Energy Control.
2003
The fonds advised by the british financial investor CVC Capital Partners buy Viterra Energy Services from Viterra AG
2001
Viterra Energy Services acquires the Stockholm-based billing company, Etrem, which has activities in Sweden, Finland and Norway. This acquisition opens the door to the Scandinavian energy and utility market. Viterra Energy Services continues to expand in the USA, acquiring 100% of the shares in Utiliread Inc., Atlanta.
2000
Viterra Energy Services takes over the Spanish company Incatema and thereby joins the Spanish and Brazilian metering business.
By acquiring Envirotech Utility Management Services, Viterra Energy Services becomes market leader in the USA for the allocation of energy and water costs based on individually measured consumption.
1999
Following the merger of Raab Karcher and Veba Immobilien to form Viterra AG, Raab Karcher Energy Services now operates under the name of Viterra Energy Services
1998
Raab Karcher Energy Services is represented with subsidiaries in practically all European countries
1997
Raab Karcher Energy Services joins the US-American market and expands its activities to Asia by setting up a representative agent in Beijing, China
1994
Merger of ISTA and CLORIUS to form RAAB KARCHER ENERGIESERVICE
1990
RAAB KARCHER takes over ISTA
1974
CLORIUS taken over by ISS
1957
ISTA is set up by Joh. Schultz and Karl Völker in Mannheim (Germany).
ISTA receives a first patent for heat allocation meters
1924
CLORIUS receives a first patent for heat allocation meters
1902
CLORIUS set up in Denmark by Odin and Aksel Clorius
