In its latest 13F filing, Andreas Halvorsen’s Viking Global Investors disclosed new positions. The size of the portfolio was increased from $18 billion in 3Q 2013 to $21 billion in 4Q 2013. The notable positions traded during the quarter are outlined in the table given below. New positions include Walgreen Co. (WAG), Canadian Pacific Railway (CP), and Cemex SAB de CV (CX). The fund increased its positions in Facebook (FB) and Valero Energy Corporation (VLO), and liquidated positions in Yahoo (YHOO) and Comcast Corporation (CMCSA).