Australia's Domain at more than one-month high on US co's buyout offer

Domain Holdings DHG.AX rises as much as 5.2% to A$4.470, highest since March 26

U.S. real estate firm CoStar CSGP.O to buy remaining shares of property classifieds co it does not own at A$4.43/shr, a 4.2% premium to last close

Implied enterprise value of Domain is A$3 bln ($1.92 bln)

Co may also declare special dividend of up to A$0.10/shr

DHG last up 2.8%, takes YD gains to 72.3%

($1 = A$1.5657)