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SEC company identity · Oct 5, 2026
Open-market timeline · full history
13 buys2 sellsbar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| BERKSHIRE HATHAWAY INCtrack record | Other | $641.6M | Unusual size |
| Fry Michael W. | Other | $661K | Unusual size | SEC |
| Hunt Mark E | Other | $458.5K | SEC |
| Hunt Mark E | Other | $16K | SEC |
| BURGESS PETER Strack record | Other | $224K | SEC |
| Grady Lois W | Other | $224K | SEC |
| Goldstein David S | Other | $278.5K | Unusual size | SEC |
| Guilbert Daniel R | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Hunt Mark E | Other | $32K | SEC |
| Hunt Mark E | Other | $16K | SEC |
| MARRA THOMAS M | Other | $10.9M | Unusual size | SEC |
| Katzmar Holmes Christine Ann | Other | $170K | Unusual size | SEC |
| Meister Margaret A. | Other | $3.2M | Unusual size | SEC |
| WHITE MOUNTAINS INSURANCE GROUP LTD | Other | $658M | Unusual size | SEC |
| Brooks Tommie D. | Other | $170K | Unusual size | SEC |
| Hunt Mark E | Other | $670.4K | SEC |
| MARRA THOMAS M | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Goldstein David S | Other | $188.8K | Unusual size | SEC |
| Guilbert Daniel R | Other | $661K | Unusual size | SEC |
| Meister Margaret A. | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Guilbert Daniel R | Other | $1.5M | Unusual size | SEC |
| LUSARDI ROBERT R | Other | $327.2K | Unusual size | SEC |
| Fry Michael W. | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| SMITH LOWNDES ANDREWtrack record | Other | $320K | SEC |
| Katzmar Holmes Christine Ann | Other | $505.4K | Unusual size | SEC |