Alt Healthworks - Costco is now projected to sell over $4 billion in organic products this year according to this article by takepart.com, which trumps Whole Foods' projected $3.6 billion and makes it the likely number one seller. The numbers were calculated by financial firm BMO Capital Markets.
The article mentioned that Costco has increased sales of organics by about $1 billion the past six months and is now going all in on that commitment, similar to the plans of other major store chains like Kroger (which was also expected to possibly surpass Whole Foods this year) and Target.
Wal-Mart also has invested heavily in organic food along with several other major retailers who have become worried about being left in the dust.