Berkshire Hathaway INC (BRK-B) SEC Filings — 2006 0 SEC filings for Berkshire Hathaway INC (BRK-B) in 2006. FilingsNo filings found for BRK-B in 2006. ExploreAll BRK-B Filings · BRK-B 2005 · BRK-B 2007 · All 2006 Filings