Booking Holdings is acquiring an Australian hotel meta search engine and adding it to its Kayak subsidiary based in Stamford.

Norwalk-based Booking Holdings did not state immediately what it paid for HotelsCombined, which was founded in 2005 and has its main office in Sydney.

HotelsCombined stated it handled 400 million hotels searches on its website last year, with its search engines combing several sites including Booking Holdings’ own and; 203-842-2545; @casoulman