The energy group employs around 1221 people, is active in most European countries and is considered too big to fail in Switzerland.

[3] The company was formed in February 2009 from the merger of Energie Ouest Suisse (EOS) and Aare-Tessin AG für Elektrizität (Atel).

By the end of May 2019, EOS Holding and Primeo Energie each took over half of the share package, financed by a mandatory convertible loan from Credit Suisse.

In addition to its headquarters in Switzerland, the company operates further power plants at several locations in Italy, Spain, France, and Hungary.

Alpiq holds a 40% interest in the Swiss Gösgen Nuclear Power Plant (capacity, 1060 MW) and is in charge of management.

The run-of-river power plant near Flumenthal has a capacity of 27 megawatts and generates 146 million kilowatt hours of electricity per year.

With an output of 23 megawatts, the Ruppoldingen run-of-river power plant generates 115 million kilowatt hours per year and is certified with the Swiss green electricity label naturemade star.

Alpiq was the worst performer among the largest energy companies, with an average of 347 environmental impact points (EIP).

[12] During the construction of the Nant de Drance pumped storage power plant, a total of CHF 22 million were invested in ecological compensation measures, in cooperation with WWF and Pro Natura.

The measures included, above all, the restoration of wetland biotopes to enable the recolonization of endangered or rare animal and plant species.

In rivers downstream of hydroelectric power plants, there is often a lack of bed load, which is considered the habitat of many aquatic creatures.

To counteract the bed load deficit in the Aare downstream of the Ruppoldingen hydroelectric power plant and protect the habitat, Alpiq poured a total of 6,000 cubic meters of gravel into the river in 2021.

[30] The Ruppoldingen hydroelectric power plant is also naturemade star certified, the highest award for green electricity in Switzerland.