Berkshire Hathaway INC (BRK-B) SEC Filings — 2026 1 SEC filing for Berkshire Hathaway INC (BRK-B) in 2026. FilingsBerkshire Hathaway INC 424B5 Filing — 424B5 · Apr 14, 2026 ExploreAll BRK-B Filings · BRK-B 2025 · All 2026 Filings