Berkshire (BRK-B)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-06 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: BERKSHIRE HATHAWAY INC (BRK.B) CIK: 0001067983 --- Reporting Owner --- Name: O'Sullivan Michael J. CIK: 0001713777 Role: Officer (See Remarks) --- Non-Derivative Transactions --- [Transaction #1] Security: Class B Common Stock Date: 2026-05-06 | Code: P (Open market purchase) Shares: +483 | Price: $467.13 Total Value: $225,623.79 Shares Owned After: 610 | Ownership: I (Indirect) | Nature: By Trust Footnotes: [F1] The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $ 467.07 to $ 467.20 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. [F2] Shares held by a living trust of which the reporting person is trustee. [Transaction #2] Security: Class B Common Stock Date: 2026-05-06 | Code: P (Open market purchase) Shares: +53 | Price: $470.22 Total Value: $24,921.66 Shares Owned After: 663 | Ownership: I (Indirect) | Nature: By Trust Footnotes: [F2] Shares held by a living trust of which the reporting person is trustee. --- Footnotes (Complete Index) --- F1: The reported price in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $ 467.07 to $ 467.20 per share, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. F2: Shares held by a living trust of which the reporting person is trustee. --- Signature --- /s/ /s/ Michael O'Sullivan (2026-05-06)