Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.
| Filed | Form | Filer | Stake | Shares | Intent | |
|---|---|---|---|---|---|---|
| 2026-08-26 | SCHEDULE 13D/A | Nonko Eugene | — | — | view → | |
| 2025-02-28 | SCHEDULE | Nonko Eugene | 10.80% | 5,996,864 | view → | |
| 2024-05-03 | SC | WHITE MOUNTAINS INSURANCE GROUP LTD | — | — | view → | |
| 2024-01-03 | SC | WHITE MOUNTAINS INSURANCE GROUP LTD | — | — | view → |
| Date | Insider | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-10-28 | Nonko Eugene | director | Sale | 1,940 | $11.63 | $23K |
| 2026-10-28 | Nonko Eugene | director | Sale | 7,273 | $11.63 | $85K |
| 2026-10-27 | Nonko Eugene | director | Sale | 3,394 | $11.92 | $40K |
| 2026-10-27 | Nonko Eugene | director | Sale | 8,283 | $11.85 | $98K |
| 2026-10-26 | Nonko Eugene | director | Sale | 1,940 | $11.83 | $23K |
| 2026-10-26 | Nonko Eugene | director | Sale | 7,273 | $11.83 | $86K |
| 2026-10-21 | Nonko Eugene | director | Sale | 1,940 | $11.63 | $23K |
| 2026-10-21 | Nonko Eugene | director | Sale | 7,273 | $11.63 | $85K |
| 2026-10-20 | Nonko Eugene | director | Sale | 1,940 | $11.62 | $23K |
| 2026-10-20 | Nonko Eugene | director | Sale | 7,273 | $11.72 | $85K |
| 2026-10-19 | Cramer Keith | officer | Sale | 12,000 | $11.39 | $137K |
| 2026-10-19 | Nonko Eugene | director | Sale | 1,940 | $11.39 | $22K |
| 2026-10-19 | Nonko Eugene | director | Sale | 7,273 | $11.39 | $83K |
| 2026-10-09 | Yi Steven | director, officer | Sale | 2,033 | $11.01 | $22K |
| 2026-10-08 | Yi Steven | director, officer | Sale | 24,000 | $10.04 | $241K |
| 2026-09-22 | Nonko Eugene | director | Sale | 1,067 | $10.79 | $12K |
| 2026-09-22 | Nonko Eugene | director | Sale | 6,667 | $10.78 | $72K |
| 2026-09-21 | Nonko Eugene | director | Sale | 1,067 | $10.54 | $11K |
| 2026-09-21 | Nonko Eugene | director | Sale | 6,667 | $10.53 | $70K |
| 2026-08-17 | Cramer Keith | officer | Sale | 13,000 | $12.76 | $166K |
| 2026-08-15 | COYNE JEFFREY B | officer | F | 2,187 | $13.17 | $29K |
| 2026-08-15 | COYNE JEFFREY B | officer | F | 2,542 | $13.17 | $33K |
| 2026-08-15 | COYNE JEFFREY B | officer | F | 5,224 | $13.17 | $69K |
| 2026-08-15 | COYNE JEFFREY B | officer | F | 4,229 | $13.17 | $56K |
| 2026-08-15 | Thompson Patrick Ryan | officer | F | 5,258 | $13.17 | $69K |
| Settlement | Short Interest | Days to Cover | % Δ vs prior |
|---|---|---|---|
| 2026-10-15 | 3,219,791 | 2.78 | +13.7% |
| 2026-09-30 | 2,831,462 | 3.14 | -7.1% |
| 2026-09-15 | 3,047,075 | 4.94 | -3.4% |
| 2026-08-31 | 3,153,546 | 5.39 | +10.0% |
| 2026-08-14 | 2,866,591 | 3.90 | +0.6% |
| 2026-07-31 | 2,848,781 | 2.40 | +4.9% |
| 2026-07-15 | 2,714,948 | 2.66 | -8.0% |
| 2026-06-30 | 2,950,610 | 3.57 | -17.2% |
| 2026-06-15 | 3,563,013 | 5.94 | +7.7% |
| 2026-05-29 | 3,307,340 | 6.48 | +1.2% |
| 2026-05-15 | 3,267,829 | 5.39 | +4.9% |
| 2026-04-30 | 3,114,988 | 4.47 | -1.6% |
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