Why are the Google founders offloading all their shares?

finance.yahoo.com — Between the two, they have cashed out $5,782,440,068 (yes, that's BILLION with a B) in Google stock over the past year and retain only about 140,000 reported shares between them, valued at $42M total. The question is, why are they getting rid of all their stock??? Sep 21, 2005 View in Crawl 4