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Berkshire Hathaway Inc (BRK.B)
United States · Delayed Price · Currency is USD
Fire, Marine & Casualty Insurance
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Insider Score
––Not scored
BRK.B Insider Score
Insiders filed in the last 90 days, but none of those trades qualified for scoring — round-trip buys and filings whose price is far off the market are excluded.
BRK.B Stock Insider Trading Activity
BRK.B stock’s insider trading shows 5 purchases for an estimated $500.62K and 1 sale on the open market for an estimated $19.97M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days0 qualifying buys0 insiders$250.07K bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Jain Ajit Director | Gift | 19 | — | — | 6.0% | 298 | Oct 21, 2026 | — | Form 4 |
| Jain Ajit Director | Sell | 39,700 | $503.09 | $19.97M | 37.0% | 67,608 | Sep 28, 2026 | — | Form 4 |
| Jain Ajit Director | Gift | 10 | — | — | 3.1% | 317 | Sep 3, 2026 | — | Form 4 |
| O'Sullivan Michael J. Other | Buy | 45 | $510.64 | $22.98K | 6.8% | 708 | Aug 12, 2026 | D | Form 4 |
| O'Sullivan Michael J. Other | Buy | 400 | $512.52 | $205.01K | 56.5% | 1,108 | Aug 12, 2026 | C | Form 4 |
| O'Sullivan Michael J. Other | Buy | 43 | $513.61 | $22.09K | 3.9% | 1,151 | Aug 12, 2026 | D | Form 4 |
| BUFFETT WARREN E Director | Gift | 1,000,000 | — | — | 99.9% | 1,162 | Jul 14, 2026 | — | Form 4 |
| BUFFETT WARREN E Director | Gift | 1,000,000 | — | — | 33.3% | 2,001,162 | Jul 14, 2026 | — | Form 4 |
| BUFFETT WARREN E Director | Gift | 1,000,000 | — | — | 50.0% | 1,001,162 | Jul 14, 2026 | — | Form 4 |
| BUFFETT WARREN E Director | Converted | 12,000,000 | — | — | 1032702% | 12,001,162 | Jul 14, 2026 | — | Form 4 |
| BUFFETT WARREN E Director | Gift | 9,000,000 | — | — | 75.0% | 3,001,162 | Jul 14, 2026 | — | Form 4 |
| Jain Ajit Director | Gift | 3 | — | — | 0.9% | 327 | Jul 1, 2026 | — | Form 4 |
| BUFFETT WARREN E Director | Gift | 160 | — | — | 12.1% | 1,162 | May 22, 2026 | — | Form 4 |
| BUFFETT WARREN E Director | Gift | 18,646 | — | — | 48.3% | 19,968 | May 18, 2026 | — | Form 4 |
| BUFFETT WARREN E Director | Converted | 37,500 | — | — | 3366% | 38,614 | May 18, 2026 | — | Form 4 |
| BUFFETT WARREN E Director | Gift | 18,646 | — | — | 93.4% | 1,322 | May 18, 2026 | — | Form 4 |
| GUYMAN CHARLOTTE Director | Gift | 574 | — | — | 16.6% | 2,888 | May 14, 2026 | — | Form 4 |
| O'Sullivan Michael J. Other | Buy | 483 | $467.13 | $225.62K | 380% | 610 | May 6, 2026 | BFirst BuyStake Doubler | Form 4 |
| O'Sullivan Michael J. Other | Buy | 53 | $470.22 | $24.92K | 8.7% | 663 | May 6, 2026 | DFirst Buy | Form 4 |
| Jain Ajit Director | Gift | 22 | — | — | 6.3% | 330 | Mar 27, 2026 | — | Form 4 |
| BUFFETT WARREN E CEO | Gift | 400,000 | — | — | 99.7% | 1,114 | Nov 10, 2025 | — | Form 4 |
| BUFFETT WARREN E CEO | Gift | 400,000 | — | — | 49.9% | 401,114 | Nov 10, 2025 | — | Form 4 |
| BUFFETT WARREN E CEO | Gift | 400,000 | — | — | 33.3% | 801,114 | Nov 10, 2025 | — | Form 4 |
| BUFFETT WARREN E CEO | Gift | 1,500,000 | — | — | 55.5% | 1,201,114 | Nov 10, 2025 | — | Form 4 |
| BUFFETT WARREN E CEO | Converted | 2,700,000 | — | — | 242370% | 2,701,114 | Nov 10, 2025 | — | Form 4 |
| GUYMAN CHARLOTTE Director | Gift | 410 | — | — | 10.6% | 3,462 | Nov 3, 2025 | — | Form 4 |
| GUYMAN CHARLOTTE Director | Converted | 1,500 | — | — | 63.2% | 3,872 | Nov 3, 2025 | — | Form 4 |
| Jain Ajit Director | Gift | 32 | — | — | 8.3% | 352 | Oct 22, 2025 | — | Form 4 |
| Jain Ajit Director | Gift | 32 | — | — | 7.7% | 384 | Sep 24, 2025 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Buy (P) — Open-market or private purchase
- Sell (S) — Open-market or private sale
- Converted (C) — Conversion of a derivative security into shares
- Gift (G) — Bona fide gift
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.