Dec 12 (Reuters) - Spanish construction giant Ferrovial

said on Thursday it closed the sale of a 19.75% stake

in Heathrow Airport Holdings for 2 billion euros ($2.10 billion)

to French investment firm Ardian and Saudi Arabia's sovereign

wealth fund PIF.

Other shareholders of FGP Topco Ltd, the parent company of

Heathrow Airport Holdings, sold an additional 17.87% stake,

taking Ardian and PIF's purchase up to 4 billion euros for

37.62%, Ferrovial said.

Later on Thursday, PIF also announced the completion of

acquisition of approximately a 15% stake of the holding company

of Heathrow Airport Holdings Ltd, saying that the investment is

in line with the PIF strategy to empower important businesses

through long-term partnerships.

The final agreement to sell stakes was announced in June

saying that Ardian and PIF would acquire 22.6% and 15%

respectively of FGP Topco Ltd.

Ferrovial, which builds and manages highways and airports,

is focusing on its expansion in the United States, where it is

building a new terminal at New York's John F. Kennedy

International Airport.

($1 = 0.9538 euros)