In 2008, Chamberlain established the Broomton Foundation, which she runs alongside other members of the Chamberlain side of the Grant family. According to Forbes, it has received about $4.5 million from the Chamberlain family, and its objective "may be one of the least clearly defined in history", namely, "its objects are to support such charities or such charitable purposes as the Trustees from time to time in their absolute discretion determine".