As of January 2016, cast members on "Shark Tank" include Mark Cuban, Daymond John, Lori Greiner and Robert Herjavec. These investors are all entrepreneurial multi-millionaires who receive business and product pitches from "Shark Tank" guests. The investors reach deal agreements in exchange for equity in the company, with some reducing their equity after the investment amount has been satisfied. The sharks also give their chosen company access to professionals with business leadership and development plans.
Mark Cuban became an entrepreneur at age 12 by selling garbage bags door-to-door. Mark kept his focus and has since become the founder of HDNet and MicroSolutions, as well as an investor in start-up companies, including Mahalo and Simple Sugars. As of January 2016, Cuban is the owner of the National Basketball Association's Dallas Mavericks.
As of January 2016, Lori Greiner holds 120 U.S. and international patents, and is the inventor of more than 400 products. Known for her presentations and shows on QVC-TV, Greiner's collection of items ranges from jewelry and cosmetic organizers to kitchen tools and travel bags. Greiner's cleverly designed products cover a large range, as she is constantly adding new items. Her "Shark Tank" interests generally include items that she considers to be easily marketable on QVC, but she has chosen to invest with guests in other product areas as well.