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BERKSHIRE HATHAWAY INC due diligence

Who BERKSHIRE HATHAWAY INC (BRK-B) is on the public record: identity, annual results, what it filed in the last year and why, straight from SEC EDGAR.

1000 filings in EDGAR's recent index, 279 of them Form 4 insider filings · view the filings on SEC EDGAR · source: SEC EDGAR submissions index and XBRL financial data

At a glance

BERKSHIRE HATHAWAY INC (BRK-B, BRK-A) is a large accelerated filer incorporated in Delaware, classified under SIC 6331 (Fire, Marine & Casualty Insurance), and lists on NYSE. Its fiscal year ends December 31. It has also filed as NBH INC.

For the fiscal year ended December 31, 2025, its 10-K reported revenue of $247B, down 1.0% from the year before, net income of $67.0B, and total assets of $1.22T.

In the twelve months to October 9, 2026 it made 95 filings on EDGAR, including 1 annual report, 3 quarterly reports, 8 current reports on Form 8-K, and 25 Form 4 insider filings, plus 6 prospectus supplements and free writing prospectuses for its securities offerings. Its 8-Ks were filed most often for results of operations (4), other events (3), and officer or director changes (2).

CIK
0001067983
Filer status
Large accelerated filer
Industry (SIC)
Fire, Marine & Casualty Insurance (6331)
Incorporated
Delaware
Listed on
NYSE
Tickers
BRK-B, BRK-A
Fiscal year end
12-31

Annual results

Fiscal year endedRevenueNet incomeTotal assets
2025-12-31$247B -1.0%$67.0B -24.8%$1.22T
2024-12-31$250B -2.0%$89.0B -7.5%$1.15T
2023-12-31$255B$96.2B$1.07T
As reported in each 10-K's XBRL data on SEC EDGAR (revenue tag RevenueFromContractWithCustomerExcludingAssessedTax); a later 10-K's restatement replaces the earlier figure.
FilingFiledPeriodAccession
Annual report (10-K)2026-03-022025-12-310001193125-26-083899
Quarterly report (10-Q)2026-08-102026-06-300001193125-26-341032
Current report (8-K)2026-08-112026-08-080001193125-26-344495

Filing activity

95 filings since 2025-10-09, 6 of them prospectus supplements and free writing prospectuses (not listed below). By form:

4
25
SCHEDULE 13G/A
17
11-K
9
8-K
8
SCHEDULE 13G
5
13F-HR
4
3
4
S-8 POS
4

8-K items in the last 12 months: results of operations (Item 2.02, 4) · other events (Item 8.01, 3) · officer or director changes (Item 5.02, 2) · charter or bylaw amendments (Item 5.03, 1) · shareholder vote results (Item 5.07, 1).

FiledFormDocumentPeriod
2026-10-07SCHEDULE 13G/ASchedule 13G amendment
2026-10-05442026-10-01
2026-09-30442026-09-28
2026-09-294PRIMARY DOCUMENT2026-09-28
2026-09-25442026-09-23
2026-09-25SDSD
2026-09-21442026-09-17
2026-09-21332026-09-17
2026-09-044PRIMARY DOCUMENT2026-09-03
2026-08-14SCHEDULE 13G/ASchedule 13G amendment
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The full due-diligence dossier on BERKSHIRE HATHAWAY INC

The free view above is identity and filing dates. The paid dossier reads the filings: business and segments, financial trend, insider and institutional activity, litigation and risk-factor themes, recent news, and the red flags, every claim cited and delivered with a data appendix.

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BRK-B insider filingsAll company profiles13F fund holdingsAll reports

Generated from public SEC EDGAR filings. Filing data is shown as filed. This is information, not investment advice.