Berkshire Hathaway INC (BRK-B) SEC Filings — 2020 0 SEC filings for Berkshire Hathaway INC (BRK-B) in 2020. FilingsNo filings found for BRK-B in 2020. ExploreAll BRK-B Filings · BRK-B 2019 · BRK-B 2021 · All 2020 Filings