Gilead Sciences, Inc. (GILD) and Bristol Myers Squibb (BMY) are leading biotechnology companies with broad and diverse portfolios and a global footprint.Gilead Sciences is a pioneer in developing treatments for human immunodeficiency virus (HIV). The company’s wide portfolio also includes drugs for liver, hematology/oncology and inflammation/respiratory diseases.On the other hand, Bristo Myers is focused on discovering, developing and delivering transformational drugs for oncology, hematology, immunology, c ...