 New York-based American Securities purchased GTL for $1 billion in 2011, and Boston-based ABRY Partners purchased Securus in 2013 for $640 million.> When the global private-equity company Castle Harlan purchased Securus Technologies from Miami-based private equity company, H.I.G.Capital in 2011, they claimed that Securus was "the leading provider" of "inmate telecommunications for the corrections industry".