Tampa, Florida-based The Mosaic Company (MOS) produces and markets concentrated phosphate and potash crop nutrients in North America and internationally. With a market cap of $7.9 billion, Mosaic operates through Phosphates, Potash, and Mosaic Fertilizantes segments. Companies worth between $2 billion and $10 billion are generally described as "mid-cap stocks." Mosaic fits right into that category, with its market cap exceeding this threshold, reflecting its substantial size and influence in the agricultu ...