Apple has fallen one place in the Fortune 500 rankings, based on company revenues.

Last year, Apple retained its #3 slot after falling behind major AAPL investor Berkshire Hathaway, but overtaking Exxon Mobile. This year, however, it has slipped to #4 …

As last year, Walmart tops the list with revenues of $500B. Exxon Mobil takes the #2 slot at $244B, with Berkshire Hathaway just behind at $242B while Apple is now #4 with revenues of $229B.

Exxon Mobil has been in the Fortune 500 list every year since it started, in 1955. That accolade is shared by 53 companies, including GE, GM and Chevron.

Fortune notes that while Apple is only 4th in terms of revenue, it is #1 for profit, at $48B.

Apple’s lowest point in the ranking was in 2002, when it was at #325. It first entered the top 100 in 2009, and the top 10 in 2013, where it has been ever since.

Photo: Matthew Roberts