AviAlliance (previously HOCHTIEF AirPort GMBH, part of the German construction conglomerate) is a significant operator/investor.
In 2013, HOCHTIEF sold all its shares in HOCHTIEF AirPort GmbH to the Public Sector Pension Investment Board (PSP Investments) of Canada for EUR1.1 billion. The transaction was concluded with economic effect from January 1st, 2013. Following the sale, the company was renamed AviAlliance.
HOCHTIEF had received bids for its airport unit from Fraport, Global Infrastructure Partners, Brookfield Asset Management and Allianz plus one unnamed bidder for its German assets only. It had previously tried to sell the unit in 2011 but the market environment was more difficult than expected.
Working together with AviAlliance Capital (previously HOCHTIEF Airport Capital) it has a relatively balanced portfolio. Four of its five airports are in Europe, with two in Germany, one in Hungary and one in Greece.
Source: Corporate website