Complex sentence: Holt eventually ended up being owned by CBS, which sold their magazines in a leveraged buyout, led by division head Peter Diamandis, to the Times-Mirror Company, which in turn sold their magazines to Time Inc. in 2001.
Split into simpler sentences: Holt eventually ended up being owned by CBS, who sold their magazines in a leveraged buyout led by division head Peter Diamandis. It was sold by Diamandis to the Times-Mirror Company, which sold their magazines to Time Inc. in 2001.