Charlotte Guyman is Director at BERKSHIRE HATHAWAY INC (BRK.A). They have made 5 open-market trades across 1 company since 2021, most recently 2026-05-14.
CIK 0001269365
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 5 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| BRK.A | 2,888 | $2.1B |
Shares reported on the most recent Form 4, priced at the 2026-05-18 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| BRK.A | SELL | 2024-12-31 | 2025-01-03 | $678064.00 | $678K | +1.6% | +2.1% | +16.5% |
| BRK.A | SELL | 2022-12-12 | 2022-12-14 | $467000.00 | $467K | -0.5% | +3.6% | -0.5% |
| BRK.A | SELL | 2021-12-16 | 2021-12-17 | $448000.00 | $4.5M | +3.3% | +9.5% | +18.3% |
| BRK.A | SELL | 2021-12-10 | 2021-12-14 | $433616.68 | $10.8M | +0.3% | +8.5% | +10.7% |
| BRK.A | SELL | 2021-12-07 | 2021-12-09 | $431009.90 | $2.2M | +2.7% | +10.6% | +13.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.