Landmark Theatres are not the same as AMC Theatres, as they have different owners, as of October 2015. Todd Wagner and Mark Cuban own Landmark Theatres, but the Wanda Group owns AMC Theatres.
Wagner/Cuban Companies is a group of businesses in the media industry. The company owns over 50 theaters, all of which specialize in showing independent films.
Wanda Group is a Chinese company that manages properties in multiple industries. Its ownership of AMC Theatres helps make it the largest cinema chain manager in the world. AMC Theatres has over 300 locations and focuses on providing a state-of-the-art experience for movie-goers with 3D and IMAX movies and updated dining options.