North Chicago, Illinois-based Abbott Laboratories (ABT) discovers, develops & manufactures a diversified line of healthcare products. Valued at $221.2 billion by market cap, Abbott’s extensive portfolio includes life-changing technologies, with leading businesses and products in diagnostics, medical devices, nutritional, and branded generic medicines. Companies worth$200 billion or more are generally described as "mega-cap stocks." Abbott Laboratories fits right into that category, with its market cap ex ...