Below is an updated look at the rankings for the largest public companies in the US. After moving back above the $100/share level today, Apple (AAPL) is back over the $600 billion mark as well. This puts it nearly $180 billion larger than Exxon Mobil (XOM), the next largest company in the US. The difference in market cap between Apple and Exxon is equivalent to the size of AT&T, the 19th largest company in the country!
Exxon is still valued at more than $400 billion, but it's getting close to losing its number 2 status to two Tech behemoths. As shown below, Google (GOOGL) is now valued at $397 billion, just $15 billion less than XOM. And don't sleep on Microsoft (MSFT) either. MSFT has surged in 2014, adding $74 billion in market cap to put it at $386.4 billion.
Berkshire Hathaway (BRK/B) rounds out the top five with a market cap of $339.5 billion. No other companies are worth more than $300 billion, but Johnson & Johnson (JNJ) is close at $296 bln.
Along with Microsoft (MSFT), other companies that have added significantly to their market caps this year include Facebook (FB) -- up $62 billion, Verizon (VZ) -- up $60 billion, Gilead Sciences (GILD) -- up $47.5 billion, and Intel (INTC) -- up $44 billion. Some of the big losers along with XOM include General Electric (GE) -- down $22.7 billion, and Amazon.com (AMZN) -- down $29 billion. Coming into the year, Amazon.com was the 16th largest company in the US, but declines in the stock have left it outside the top 25.