UK betting giant William Hill has done a deal to buy Brandywine Bookmaking for $15.7m (£9.4m).
Brandywine operates 16 sportsbooks in Nevada under the Lucky's brand and one in St Kitts in the Caribbean.
It is also the exclusive odds maker for the Delaware State Sports Lottery, which it operates in partnership with Scientific Games.
In 2010, its revenues were $7.7m.
William Hill chief executive Ralph Topping said: "We see the US sportsbook industry as a great development opportunity for William Hill and are excited by the opportunity to invest in bringing together three highly respected leaders in Nevada and Delaware."