← United States · Coverage record
US · SEC FORM 4
WHITE MOUNTAINS INSURANCE GROUP LTD
WTM · NYSE · CIK 0000776867 · Financial Services · Insurance—Property & Casualty
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
11 Form 4 transaction lines observed in the same window
0 sales · 11 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
Showing the six most active owners; 4 additional owner(s) remain in Form 4 evidence.
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2023-11-17 · Hicks Weston M.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 139,645
- Previous report
- 135,407
- Avg daily volume
- 18,801
- Days to cover
- 7.4
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2023-11-17 | Hicks Weston M | Purchase (P) | Common Shares | 1,000 | USD 1,480.56 | USD 1,480,557 | SEC filing ↗ |
| 2023-11-17 | Hicks Weston M | Purchase (P) | Common Shares | 1,000 | USD 1,480.56 | USD 1,480,557 | SEC filing ↗ |
| 2020-03-24 | DAVIS MORGAN W | Purchase (P) | Common Shares | 1,050 | USD 757.61 | USD 795,486 | SEC filing ↗ |
Form 4 evidence
29 transaction lines in the latest 365-day window; 159 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-08-31 | Tanner David Allen | Gift (G) | Common Shares | 2 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-26 | Klar Stephen | Award / grant (A) | Common Shares | 113 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-21 | Tanner David Allen | Award / grant (A) | Common Shares | 135 | USD 0.00 | USD 0 | SEC filing ↗ |
Show recent Form 4 evidence (29 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-08-31 | Tanner David Allen | Gift (G) | Common Shares | 2 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-26 | Klar Stephen | Award / grant (A) | Common Shares | 113 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-21 | Tanner David Allen | Award / grant (A) | Common Shares | 135 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-21 | SHANK SUZANNE F. | Award / grant (A) | Common Shares | 135 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-21 | Hicks Weston M | Award / grant (A) | Common Shares | 190 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-21 | Gelston Philip A | Award / grant (A) | Common Shares | 135 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-21 | Dillon Margaret | Award / grant (A) | Common Shares | 135 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-21 | Chu John | Award / grant (A) | Common Shares | 135 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-21 | Carlson Peter M | Award / grant (A) | Common Shares | 135 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-21 | CHOKSI MARY C | Award / grant (A) | Common Shares | 135 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-21 | CAMPBELL REID TARLTON | Award / grant (A) | Common Shares | 135 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-19 | SEELIG ROBERT LAWRENCE | Gift (G) | Common Shares | 50 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-04 | Tanner David Allen | Gift (G) | Common Shares | 225 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-25 | SEELIG ROBERT LAWRENCE | Award / grant (A) | Common Shares (restricted) | 775 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-25 | Papamichael Michael A | Award / grant (A) | Common Shares (Restricted) | 500 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-25 | Hildreth Michaela | Award / grant (A) | Common Shares (Restricted) | 600 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-25 | Harrison Giles E | Award / grant (A) | Common Shares (restricted) | 775 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-25 | Caffrey Liam P | Award / grant (A) | Common Shares (Restricted) | 1,500 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-01-01 | Hildreth Michaela | Tax withholding (F) | Common Shares | 274 | USD 2,078.03 | USD 569,380 | SEC filing ↗ |
| 2026-01-01 | SEELIG ROBERT LAWRENCE | Tax withholding (F) | Common Shares | 398 | USD 2,078.03 | USD 827,056 | SEC filing ↗ |
| 2026-01-01 | Papamichael Michael A | Tax withholding (F) | Common Shares | 131 | USD 2,078.03 | USD 272,222 | SEC filing ↗ |
| 2026-01-01 | Caffrey Liam P | Tax withholding (F) | Common Shares | 425 | USD 2,078.03 | USD 883,163 | SEC filing ↗ |
| 2025-12-23 | Hildreth Michaela | Gift (G) | Common Shares | 60 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2025-12-19 | Rountree George Manning | Sale (S) | Common Shares | 5,000 | USD 2,050.00 | USD 10,250,000 | SEC filing ↗ |
| 2025-12-19 | CAMPBELL REID TARLTON | Sale (S) | Common Shares | 5,000 | USD 2,050.00 | USD 10,250,000 | SEC filing ↗ |
| 2025-12-19 | CAMPBELL REID TARLTON | Sale (S) | Common Shares | 5,000 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2025-12-16 | Gelston Philip A | Sale (S) | Common Shares | 165 | USD 2,048.51 | USD 338,004 | SEC filing ↗ |
| 2025-11-25 | CAMPBELL REID TARLTON | Gift (G) | Common Shares | 50 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2025-11-10 | Tanner David Allen | Gift (G) | Common Shares | 4 | USD 0.00 | USD 0 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | WTM |
| CIK | 0000776867 |
| Sector | Financial Services |
| Industry | Insurance—Property & Casualty Yahoo Finance |
| SEC SIC | 6331 Fire, Marine & Casualty Insurance |
| Exchange | NYSE |
Data coverage
| Local Form 4 history | 159 transaction lines from 2020-01-01 to 2026-08-31 13 P purchase lines · 10 S sale lines · 136 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.