Most Widely Held Stocks You May Not Know You Own By: CNBC.com News September 10, 2012 at 13:33 PM EDT Here are the top 10 most widely held and heavily weighted stocks owned by equity mutual funds in all 401(k) retirement plans. Read More >> Related Stocks: Amazon.com Apple Comcast Corp Exxon Mobil Google, Inc. Microsoft Wal-Mart Stores, Inc. Wells Fargo