April 24 (Reuters) - Hong Kong Exchanges and Clearing 0388.HK said on Thursday it would buy the top nine floors of One Exchange Square via its unit as its permanent headquarters from Hongkong Land HKLD.SI for HK$6.3 billion ($812.06 million).
($1 = 7.7580 Hong Kong dollars)
(Reporting by Shivangi Lahiri in Bengaluru; Editing by Rashmi Aich)
((Shivangi.Lahiri@thomsonreuters.com;))