There weren't many surprises on Fortune’s annual list of the 500 wealthiest companies, but one surprise was the company who didn't appear at the top.

Walmart is almost a consistent winner as the world’s largest retail chain and the largest company on the annual Fortune 500 list, but this year This year it dropped a notch to second place behind Exxon.

It still is the biggest retail outlet on the list, but it was not a big enough year to get it to the top. Walmart earned over $446 million in revenue for 2011.

Exxon replaced Walmart at the top by increasing revenues by 28% and reaching $452 billion, and increased profits by 35% to more than $40 billion.

Here is this years Fortune 500 list:

Fortune’s Top 10 Wealthiest Companies and Their Total Revenue for 2011

1. Exxon – $452.9 million
2. Wal-Mart – $446.9 million
3. Chevron – $245.6 million
4. ConocoPhillips – $237.3 million
5. General Motors – $150.3 million
6. General Electric – $147.6 million
7. Berkshire Hathaway – $143.7 million
8. Fannie Mae – $137.5 million
9. Ford – $136.3 million
10. Hewlett-Packard – $127.2 million