SEC 8-K and 6-K filings classified by Claude with reasoning, plus Form 4 insider transactions. Ingested from EDGAR’s filing stream in near-real time, reconciled overnight.
Open-market buys and sells only — the deliberate trades. Zero here doesn’t mean no filings: grants, option exercises and tax withholding (below) are compensation, not market trades.
| Insider | Role | Date | Transaction | Shares | Value |
|---|---|---|---|---|---|
| Jain Ajit | Vice Chairman, Director | 2026-09-03 | Gift | 10 | — |
| O'Sullivan Michael J. | See Remarks | 2026-08-12 | Open-market buy | 45 | $23K |
| O'Sullivan Michael J. | See Remarks | 2026-08-12 | Open-market buy | 400 | $205K |
| O'Sullivan Michael J. | See Remarks | 2026-08-12 | Open-market buy | 43 | $22K |
| BUFFETT WARREN E | Director, 10% Owner | 2026-07-14 | C | 12000000 | $0 |
| BUFFETT WARREN E | Director, 10% Owner | 2026-07-14 | Gift | 9000000 | $0 |
| BUFFETT WARREN E | Director, 10% Owner | 2026-07-14 | Gift | 1000000 | $0 |
| BUFFETT WARREN E | Director, 10% Owner | 2026-07-14 | Gift | 1000000 | $0 |
| BUFFETT WARREN E | Director, 10% Owner | 2026-07-14 | Gift | 1000000 | $0 |
| Jain Ajit | Vice Chairman, Director | 2026-07-01 | Gift | 3 | — |
| BUFFETT WARREN E | Director, 10% Owner | 2026-05-22 | Gift | 160 | $0 |
| BUFFETT WARREN E | Director, 10% Owner | 2026-05-18 | C | 37500 | $0 |
| BUFFETT WARREN E | Director, 10% Owner | 2026-05-18 | Gift | 18646 | $0 |
| BUFFETT WARREN E | Director, 10% Owner | 2026-05-18 | Gift | 18646 | $0 |
| GUYMAN CHARLOTTE | Director | 2026-05-14 | Gift | 574 | $0 |
| O'Sullivan Michael J. | See Remarks | 2026-05-06 | Open-market buy | 483 | $226K |
| O'Sullivan Michael J. | See Remarks | 2026-05-06 | Open-market buy | 53 | $25K |
| Jain Ajit | Vice Chairman, Director | 2026-03-27 | Gift | 22 | — |
| BUFFETT WARREN E | Chairman and CEO, Director, 10% Owner | 2025-11-10 | C | 2700000 | $0 |
| BUFFETT WARREN E | Chairman and CEO, Director, 10% Owner | 2025-11-10 | Gift | 1500000 | $0 |
Fiscal period ending 2025-12-31 versus 2024-12-31 — view filing on EDGAR →
A long-anticipated CEO succession reduces the dominant key-person risk, but two new worsening disclosures — expanding AI/regulatory compliance exposure and escalating litigation costs driven by third-party funding and social inflation — offset the governance gain. The litigation cost escalation is the most consequential new risk, with structural drivers (funded plaintiffs, inflated verdicts) that are difficult to mitigate operationally.
0 company-specific · 1 eased/removed · 2 common-mode
Succession plan executed: Abel appointed CEO effective Jan 2026, reducing key-person risk concentration on 94-year-old Buffett. Material governance improvement.
We are dependent on a few key people for our major investment and capital allocation decisions. In May 2025, Berkshire’s Board of Directors appointed Mr. Gregory E. Abel to succeed Mr. Warren E.…
Addition of AI regulation risk and explicit mention of "increased laws and regulations" escalates compliance burden beyond prior data privacy focus.
Regulatory changes may adversely impact our future operating results. Over time, regulatory initiatives have been adopted in the United States and elsewhere for a variety of reasons, including as…
New disclosure of third-party litigation funding and social inflation trends as drivers of increased litigation frequency and larger verdicts, escalating claims cost risk.
Risks unique to our regulated businesses Our tolerance for underwriting risk assumed in our various insurance businesses may result in significant underwriting losses. When properly paid for the risk…
We track this company, but none of its filings have been classified as material yet. New filings land after EDGAR’s nightly publish (~10 PM ET).