Liberty Media shares were up 2% in premarket trading. Liberty Media intends to offer its shareholders one share in the spun-off company for every four shares held, Liberty Broadband said. Berkshire Hathaway Inc and Comcast Corp are among Liberty Media's top shareholders. Liberty Broadband will house Liberty's stake in Charter Communications, investments in Time Warner Cable and the small location technology company True Position Technologies Inc. The spin-off enables Liberty to eventually sell the asset but disadvantages include lengthy holding periods to keep the transaction tax efficient, Macquarie Research analysts wrote in a note.