After-Hours Buzz: HPQ, FFIV, AAP & More By: CNBC.com News April 04, 2013 at 16:53 PM EDT Check out which companies are making headlines after the bell Thursday: Read More >> Related Stocks: Advance Auto Parts Inc Aetna Best Buy Cigna Corp F5 Networks Hanesbrands Inc Hewlett-Packard Humana Huntington Bancshares UnitedHealth Group W D 40 Company