Over one hundred years of experience

CVC Capital Partners announces the sale of their stake in ista International GmbH to Charterhouse Capital Partners.

As part of its final separation from the Viterra AG real estage group, Viterra returns to its roots and is named ista North America.

Viterra is sold to the British Investment Company CVC Capital Partners. The ownership is transferred with retroactive economic effect from January 1, 2003.

Viterra Energy Services continues to expand its activities in the USA and has acquired 100% of the shares in Utiliread Inc, Atlanta.

Viterra Energy Services AG has acquired the Stockholm metering and accounting company Etrem with activities in Sweden, Finland and Norway and thus joins the Scandinavian energy and utility market.

With its program "Energie im Griff" (Getting a Grip on Energy), Viterra Energy Services offers comprehensive services for the German metering market.

Viterra Energy Services takes over the Spanish company Incatema and thus joins the Spanish and Brazilian metering business.

Viterra Energy Services becomes market leader in the Czech Republic.

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.

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

Raab Karcher Energy Services is represented with subsidiaries in practically all European countries

Raab Karcher Energy Services joins the US-American market and expands its activities to Asia by setting up a representative agent in Beijing, China

Merger of ISTA and CLORIUS to form RAAB KARCHER ENERGIESERVICE

RAAB KARCHER takes over ISTA

CLORIUS taken over by ISS

ISTA is set up by Joh. Schultz and Karl Völker in Mannheim (Germany). ISTA receives a first patent for heat allocation meters.

CLORIUS receives a first patent for heat allocation meters

CLORIUS set up in Denmark by Odin and Aksel Clorius

At ista North America, our people make the difference. Our team provides superior utility expense management solutions. We can custom design solutions from our offering of comprehensive, field-proven systems and services. We offer utility submetering, resident billing, Utility Expense Management, Energy Cost Allocation, advanced MITS compliant EDI, Collections, and hardware installation for water, electric, and gas submeters.  Find out how to increase your NOI with ista by your side today!