Sysco Corporation (NYSE:SYY) is included among the Best Retirement Stocks for a Dividend Stock Portfolio. Sysco Corporation (SYY): A Reliable Choice for a Dividend Stock Portfolio in Retirement Sysco Corporation (NYSE:SYY) is the largest foodservice distributor in North America, serving restaurants, hospitals, schools, and hospitality businesses. Its main operations revolve around delivering and selling fresh, frozen, and packaged foods, as well as equipment and supplies, to commercial clients. Success ...