North Chicago, Illinois-based AbbVie Inc. (ABBV) is a biopharmaceutical company that researches, develops, manufactures, commercializes, and sells medicines and therapies. Valued at a market cap of $397.3 billion, the company primarily concentrates on key therapeutic areas, including immunology, oncology, neuroscience, eye care, and aesthetics. Companies worth $200 billion or more are typically classified as “mega-cap stocks,” and AbbVie fits the label perfectly, with its market cap exceeding this thresh ...