Berkshire Hathaway INC (BRK-B) SEC Filings — 2011 0 SEC filings for Berkshire Hathaway INC (BRK-B) in 2011. FilingsNo filings found for BRK-B in 2011. ExploreAll BRK-B Filings · BRK-B 2010 · BRK-B 2012 · All 2011 Filings