RIYADH, Nov 29 (Reuters) - Saudi Arabia's Public Investment Fund (PIF) has struck a share purchase agreement to buy a 10% stake in TOPCO, the holding company of Heathrow Airport Holdings Ltd, from Ferrovial (FERF.AS), state news agency (SPA) reported on Wednesday. Reporting by Clauda Tanios Editing by Mark PotterOur Standards: The Thomson Reuters Trust Principles.

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Persons: Clauda, Mark Potter Organizations: Saudi, Public Investment Fund, Heathrow Airport Holdings, Thomson Locations: RIYADH, TOPCO, Ferrovial