The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 4, 2025 | Buffett Warren E | 10% Owner | Buy(P) | 1.0M | $21.63 | $22.4M |
| Aug 1, 2025 | Buffett Warren E | 10% Owner | Buy(P) | 1.9M | $21.02 | $40.6M |
| Jul 31, 2025 | Buffett Warren E | 10% Owner | Buy(P) | 85K | $21.43 | $1.8M |
| Jul 31, 2025 | Buffett Warren E | 10% Owner | Buy(P) | 2.0M | $21.04 | $41.6M |
| Feb 3, 2025 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 433K | $23.49 | $10.2M |
| Feb 3, 2025 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 284K | $24.05 | $6.8M |
| Jan 31, 2025 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 840K | $23.62 | $19.8M |
| Jan 30, 2025 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 751K | $22.79 | $17.1M |
| Dec 19, 2024 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 31K | $21.52 | $674K |
| Dec 19, 2024 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 2.0M | $20.85 | $42.5M |
| Dec 18, 2024 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 916K | $21.94 | $20.1M |
| Dec 18, 2024 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 539K | $22.49 | $12.1M |
| Dec 17, 2024 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 1.4M | $22.13 | $31.9M |
| Oct 31, 2024 | Buffett Warren E | 10% Owner | Buy(P) | 679K | $26.59 | $18.1M |
| Oct 30, 2024 | Buffett Warren E | 10% Owner | Buy(P) | 925K | $27.44 | $25.4M |
| Oct 29, 2024 | Buffett Warren E | 10% Owner | Buy(P) | 624K | $27.65 | $17.2M |
| Oct 18, 2024 | Buffett Warren E | 10% Owner | Buy(P) | 176K | $27.43 | $4.8M |
| Oct 17, 2024 | Buffett Warren E | 10% Owner | Buy(P) | 1.0M | $27.01 | $28.1M |
| Oct 16, 2024 | Buffett Warren E | 10% Owner | Buy(P) | 342K | $26.99 | $9.2M |
| Oct 11, 2024 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 1.3M | $24.95 | $31.4M |
| Oct 10, 2024 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 517K | $24.47 | $12.7M |
| Oct 10, 2024 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 918K | $24.16 | $22.2M |
| Oct 9, 2024 | Berkshire Hathaway Inc | 10% Owner | Buy(P) | 870K | $23.55 | $20.5M |
| Sep 9, 2024 | Liberty Sirius XM Holdings Inc. | Director, 10% Owner | Other(J) | 3.2B | — | — |
| Sep 9, 2024 | Liberty Sirius XM Holdings Inc. | Director, 10% Owner | Other(J) | 0 | — | — |
| Sep 9, 2024 | Liberty Media Corp | Director, 10% Owner | Other(J) | 3.2B | — | — |
| Sep 9, 2024 | Liberty Media Corp | Director, 10% Owner | Other(J) | 0 | — | — |
| Apr 7, 2023 | Liberty Media Corp | Director, 10% Owner | Buy(P) | 0 | $28,050,824.36 | $0 |
| Apr 5, 2023 | Liberty Media Corp | Director, 10% Owner | Buy(P) | 0 | $247,074,094.03 | $0 |
| Mar 8, 2023 | Liberty Media Corp | Director, 10% Owner | Buy(P) | 0 | $112,139,108.20 | $0 |
| Nov 1, 2021 | Liberty Media Corp | Director, 10% Owner | Buy(P) | 43.7M | — | — |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Coverage: Form 4 filings indexed 2021-03-29 → 2026-07-14. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).