The story
All of South Africa's airports used to be owned and operated by the state until 23 July 1993, when nine airports were reassigned to ACSA. ACSA was then owned by the South African Government through the Department of Transport.
In 1998, Aeroporti di Roma bought 20% of ACSA's shares for R819 million. In 2005, the Public Investment Corporation, bought the 20% shares back from the Italian group.
In 2006, ACSA was part of a consortium that won the bid to manage the Chhatrapati Shivaji International Airport in Mumbai, India.
In 2012, ACSA signed a 20-year concession agreement to manage the São Paulo–Guarulhos International Airport in Brazil, a strategic alliance between two countries that organized the soccer world cup in recent years. The deal was signed through a consortium including Brazil's Invepar for 51% of the concession and at a cost of $9.2 billion.
In May 2016, ACSA finished installing a solar power plant near the Kimberley Airport as part of a broader plan to install solar farms in all of its regional airports.
From Wikipedia’s article on Airports Company South Africa, shared under CC BY-SA 4.0.4