Berkshire Hathaway INC (BRK-B) SEC Filings — 2021 0 SEC filings for Berkshire Hathaway INC (BRK-B) in 2021. FilingsNo filings found for BRK-B in 2021. ExploreAll BRK-B Filings · BRK-B 2020 · BRK-B 2022 · All 2021 Filings