WTM
WHITE MOUNTAINS INSURANCE GROUP LTD
+20.09 (+0.97%)2,082.5USD6.6K成交股數5.0B市值4.8本益比(近四季)1.3股價營收比+22.6%營收年增(近四季)2026-11-05下次財報
內部人交易 SEC Form 4 · 董事、高階主管與持股 10% 以上股東 · 交易後兩個營業日內申報
買賣點與股價近一年
● 公開市場買進 · ● 公開市場賣出 · 空心 = 10b5-1 預設計畫(事先排程,不代表當下看法)。近一年,只畫 P / S 兩種代碼。
統計
| 近 90 天 買進筆數 · 金額 · 人數 | 0 · 0.00 · 0 |
|---|---|
| 近 90 天 賣出筆數 · 金額 · 人數 | 0 · 0.00 · 0 |
| 其中 10b5-1 計畫賣出 | 0 筆 |
| 近 180 天 買進 · 賣出金額 | 0.00 · 0.00 |
| 近 180 天 淨額 | 0.00 |
公開市場買進(P)是內部人自掏腰包,通常比賣出更有資訊含量 —— 賣出的理由很多(繳稅、分散、買房),買進的理由只有一個。
10b5-1 是事先排定的交易計畫,執行時點不反映當下看法。獲配股票(A)、繳稅扣股(F)、選擇權執行(M)是薪酬流程,不是意見。
| 交易日 | 申報日 | 申報人 | 職稱 | 代碼 | 股數 | 價格 | 金額 | 交易後持股 | 原件 |
|---|---|---|---|---|---|---|---|---|---|
| 2026-08-31 | 08-31 | Tanner David Allen | Director | G 贈與 | 2 | – | – | 2.0K | SEC |
| 2026-08-26 | 08-27 | Klar Stephen | Director | A 獲配股票 | 113 | – | – | 113 | SEC |
| 2026-05-21 | 05-22 | Chu John | Director | A 獲配股票 | 135 | – | – | 335 | SEC |
| 2026-05-21 | 05-22 | Carlson Peter M | Director | A 獲配股票 | 135 | – | – | 852 | SEC |
| 2026-05-21 | 05-22 | Dillon Margaret | Director | A 獲配股票 | 135 | – | – | 1.1K | SEC |
| 2026-05-21 | 05-22 | CAMPBELL REID TARLTON | Director | A 獲配股票 | 135 | – | – | 10.6K | SEC |
| 2026-05-21 | 05-22 | SHANK SUZANNE F. | Director | A 獲配股票 | 135 | – | – | 1.0K | SEC |
| 2026-05-21 | 05-22 | CHOKSI MARY C | Director | A 獲配股票 | 135 | – | – | 2.0K | SEC |
| 2026-05-21 | 05-22 | Hicks Weston M | Director | A 獲配股票 | 190 | – | – | 2.9K | SEC |
| 2026-05-21 | 05-22 | Tanner David Allen | Director | A 獲配股票 | 135 | – | – | 2.0K | SEC |
| 2026-05-21 | 05-22 | Gelston Philip A | Director | A 獲配股票 | 135 | – | – | 1.7K | SEC |
| 2026-03-19 | 03-20 | SEELIG ROBERT LAWRENCE | EVP & General Counsel | G 贈與 | 50 | – | – | 17.9K | SEC |
| 2026-03-04 | 03-05 | Tanner David Allen | Director | G 贈與 | 225 | – | – | 1.9K | SEC |
| 2026-02-25 | 02-27 | Papamichael Michael A | Chief Financial Officer | A 獲配股票 | 500 | – | – | 1.2K | SEC |
| 2026-02-25 | 02-27 | SEELIG ROBERT LAWRENCE | EVP & General Counsel | A 獲配股票 | 775 | – | – | 2.5K | SEC |
| 2026-02-25 | 02-27 | Harrison Giles E | President | A 獲配股票 | 775 | – | – | 2.7K | SEC |
| 2026-02-25 | 02-27 | Caffrey Liam P | Chief Executive Officer | A 獲配股票 | 1.5K | – | – | 3.6K | SEC |
| 2026-02-25 | 02-27 | Hildreth Michaela | MD & Chief Accounting Officer | A 獲配股票 | 600 | – | – | 1.8K | SEC |
| 2026-01-01 | 01-05 | Hildreth Michaela | MD & Chief Accounting Officer | F 繳稅扣股 | 274 | 2,078.0 | 569K | 2.5K | SEC |
| 2026-01-01 | 01-02 | Papamichael Michael A | Chief Financial Officer | F 繳稅扣股 | 131 | 2,078.0 | 272K | 772 | SEC |
| 2026-01-01 | 01-02 | SEELIG ROBERT LAWRENCE | EVP & General Counsel | F 繳稅扣股 | 398 | 2,078.0 | 827K | 17.9K | SEC |
| 2026-01-01 | 01-02 | Caffrey Liam P | Chief Executive Officer | F 繳稅扣股 | 425 | 2,078.0 | 883K | 1.7K | SEC |
| 2025-12-23 | 12-23 | Hildreth Michaela | MD & Chief Accounting Officer | G 贈與 | 60 | – | – | 2.2K | SEC |
| 2025-12-19 | 12-22 | Rountree George Manning | Chief Executive Officer | S 公開市場賣出 | 5.0K | 2,050.0 | 10.3M | 13.8K | SEC |
| 2025-12-19 | 12-22 | CAMPBELL REID TARLTON | Director | S 公開市場賣出 | 5.0K | 2,050.0 | 10.3M | 10.4K | SEC |
| 2025-12-19 | 12-22 | CAMPBELL REID TARLTON | Director | S 公開市場賣出 | 5.0K | – | – | 10.4K | SEC |
| 2025-12-16 | 12-16 | Gelston Philip A | Director | S 公開市場賣出 | 165 | 2,048.5 | 338K | 1.6K | SEC |
| 2025-11-25 | 11-26 | CAMPBELL REID TARLTON | Director | G 贈與 | 50 | – | – | 15.4K | SEC |
| 2025-11-10 | 11-10 | Tanner David Allen | Director | G 贈與 | 4 | – | – | 2.1K | SEC |
| 2025-05-22 | 05-27 | SHANK SUZANNE F. | Director | A 獲配股票 | 150 | – | – | 871 | SEC |
| 2025-05-22 | 05-23 | CAMPBELL REID TARLTON | Director | A 獲配股票 | 150 | – | – | 15.5K | SEC |
| 2025-05-22 | 05-23 | Hicks Weston M | Director | A 獲配股票 | 210 | – | – | 2.7K | SEC |
| 2025-05-22 | 05-23 | Yi Steven | Director | A 獲配股票 | 150 | – | – | 525 | SEC |
| 2025-05-22 | 05-23 | Tanner David Allen | Director | A 獲配股票 | 150 | – | – | 2.1K | SEC |
| 2025-05-22 | 05-23 | CHOKSI MARY C | Director | A 獲配股票 | 150 | – | – | 1.9K | SEC |
| 2025-05-22 | 05-23 | Gelston Philip A | Director | A 獲配股票 | 150 | – | – | 1.7K | SEC |
| 2025-05-22 | 05-23 | Carlson Peter M | Director | A 獲配股票 | 150 | – | – | 717 | SEC |
| 2025-05-22 | 05-23 | Dillon Margaret | Director | A 獲配股票 | 150 | – | – | 945 | SEC |
| 2025-02-26 | 02-28 | Hildreth Michaela | MD & Chief Accounting Officer | A 獲配股票 | 625 | – | – | 1.8K | SEC |
| 2025-02-26 | 02-28 | Harrison Giles E | EVP & Chief Strategy Officer | A 獲配股票 | 900 | – | – | 1.9K | SEC |
| 2025-02-26 | 02-28 | Rountree George Manning | Chief Executive Officer | A 獲配股票 | 1.6K | – | – | 5.4K | SEC |
| 2025-02-26 | 02-28 | Caffrey Liam P | EVP& Chief Financial Officer | A 獲配股票 | 1.0K | – | – | 3.4K | SEC |
| 2025-02-26 | 02-28 | SEELIG ROBERT LAWRENCE | EVP & General Counsel | A 獲配股票 | 825 | – | – | 2.7K | SEC |
| 2025-01-01 | 01-03 | Hildreth Michaela | MD & Chief Accounting Officer | F 繳稅扣股 | 323 | 1,945.1 | 628K | 2.2K | SEC |
| 2025-01-01 | 01-03 | Rountree George Manning | Chief Executive Officer | F 繳稅扣股 | 1.1K | 1,945.1 | 2.1M | 18.8K | SEC |
| 2025-01-01 | 01-03 | Caffrey Liam P | President & CFO | F 繳稅扣股 | 420 | 1,945.1 | 817K | 830 | SEC |
| 2025-01-01 | 01-03 | SEELIG ROBERT LAWRENCE | EVP & General Counsel | F 繳稅扣股 | 496 | 1,945.1 | 965K | 17.3K | SEC |
| 2024-11-29 | 12-02 | Hildreth Michaela | MD & Chief Accounting Officer | G 贈與 | 75 | – | – | 1.8K | SEC |
| 2024-06-10 | 06-10 | Harrison Giles E | EVP & Chief Strategy Officer | A 獲配股票 | 1.0K | – | – | 1.0K | SEC |
| 2024-05-23 | 05-24 | Hicks Weston M | Director | A 獲配股票 | 230 | – | – | 2.5K | SEC |
| 2024-05-23 | 05-24 | CAMPBELL REID TARLTON | Director | A 獲配股票 | 165 | – | – | 15.3K | SEC |
| 2024-05-23 | 05-24 | Yi Steven | Director | A 獲配股票 | 165 | – | – | 375 | SEC |
| 2024-05-23 | 05-24 | Tanner David Allen | Director | A 獲配股票 | 165 | – | – | 2.0K | SEC |
| 2024-05-23 | 05-24 | SHANK SUZANNE F. | Director | A 獲配股票 | 165 | – | – | 721 | SEC |
| 2024-05-23 | 05-24 | Gelston Philip A | Director | A 獲配股票 | 165 | – | – | 1.6K | SEC |
| 2024-05-23 | 05-24 | Dillon Margaret | Director | A 獲配股票 | 165 | – | – | 795 | SEC |
| 2024-05-23 | 05-24 | CHOKSI MARY C | Director | A 獲配股票 | 165 | – | – | 1.7K | SEC |
| 2024-05-23 | 05-24 | Carlson Peter M | Director | A 獲配股票 | 165 | – | – | 1.1K | SEC |
| 2024-03-21 | 03-21 | CAMPBELL REID TARLTON | Director | G 贈與 | 55 | – | – | 15.2K | SEC |
| 2024-02-22 | 02-23 | Caffrey Liam P | EVP& Chief Financial Officer | A 獲配股票 | 1.1K | – | – | 3.6K | SEC |
| 2024-02-22 | 02-23 | SEELIG ROBERT LAWRENCE | EVP & General Counsel | A 獲配股票 | 900 | – | – | 3.1K | SEC |
| 2024-02-22 | 02-23 | Hildreth Michaela | MD & Chief Accounting Officer | A 獲配股票 | 600 | – | – | 1.9K | SEC |
| 2024-02-22 | 02-23 | CAMPBELL REID TARLTON | Director | A 獲配股票 | 45 | – | – | 15.2K | SEC |
| 2024-02-22 | 02-23 | Rountree George Manning | Chief Executive Officer | A 獲配股票 | 1.8K | – | – | 6.5K | SEC |
| 2024-01-01 | 01-02 | CAMPBELL REID TARLTON | President | F 繳稅扣股 | 710 | 1,505.0 | 1.1M | 15.2K | SEC |
| 2024-01-01 | 01-02 | SEELIG ROBERT LAWRENCE | EVP & General Counsel | F 繳稅扣股 | 399 | 1,505.0 | 600K | 16.6K | SEC |
| 2024-01-01 | 01-02 | Hildreth Michaela | MD & Chief Accounting Officer | F 繳稅扣股 | 261 | 1,505.0 | 393K | 1.9K | SEC |
| 2024-01-01 | 01-02 | Rountree George Manning | Chief Executive Officer | F 繳稅扣股 | 1.1K | 1,505.0 | 1.6M | 17.2K | SEC |
| 2023-12-01 | 12-01 | Hildreth Michaela | MD & Chief Accounting Officer | G 贈與 | 100 | – | – | 1.5K | SEC |
| 2023-11-17 | 11-20 | Hicks Weston M | Director | P 公開市場買進 | 120 | 1,476.7 | 177K | 1.5K | SEC |
| 2023-11-17 | 11-20 | Hicks Weston M | Director | P 公開市場買進 | 11 | 1,483.4 | 16K | 2.1K | SEC |
| 2023-11-17 | 11-20 | Hicks Weston M | Director | P 公開市場買進 | 579 | 1,479.9 | 857K | 2.1K | SEC |
| 2023-11-17 | 11-20 | Hicks Weston M | Director | P 公開市場買進 | 120 | 1,476.7 | 177K | 1.5K | SEC |
| 2023-11-17 | 11-20 | Hicks Weston M | Director | P 公開市場買進 | 52 | 1,476.2 | 77K | 1.4K | SEC |
| 2023-11-17 | 11-20 | Hicks Weston M | Director | P 公開市場買進 | 238 | 1,485.0 | 353K | 2.3K | SEC |
| 2023-11-17 | 11-20 | Hicks Weston M | Director | P 公開市場買進 | 11 | 1,483.4 | 16K | 2.1K | SEC |
| 2023-11-17 | 11-20 | Hicks Weston M | Director | P 公開市場買進 | 579 | 1,479.9 | 857K | 2.1K | SEC |
| 2023-11-17 | 11-20 | Hicks Weston M | Director | P 公開市場買進 | 238 | 1,485.0 | 353K | 2.3K | SEC |
| 2023-11-17 | 11-20 | Hicks Weston M | Director | P 公開市場買進 | 52 | 1,476.2 | 77K | 1.4K | SEC |
| 2023-05-25 | 05-30 | Carlson Peter M | Director | A 獲配股票 | 180 | – | – | 968 | SEC |
機構持股(13F) 管理規模 1 億美元以上的機構,每季末後 45 天內申報 · 最新 2026-06-30
前 25 大持有機構季末市值 · 與前一季股數比較
| 機構 | 持股 | 季末市值 | 股數季變化 | 動作 |
|---|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP | 159K | 330M | 新進 | 新進 |
| NEUBERGER BERMAN GROUP LLC | 119K | 247M | 新進 | 新進 |
| BlackRock, Inc. | 118K | 244M | 新進 | 新進 |
| River Road Asset Management, LLC | 116K | 240M | 新進 | 新進 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 112K | 232M | 新進 | 新進 |
| VANGUARD CAPITAL MANAGEMENT LLC | 107K | 223M | 新進 | 新進 |
| FULLER & THALER ASSET MANAGEMENT, INC. | 102K | 211M | 新進 | 新進 |
| COOKE & BIELER LP | 85.1K | 176M | 新進 | 新進 |
| Wallace Capital Management Inc. | 80.1K | 166M | 新進 | 新進 |
| FIDUCIARY MANAGEMENT INC /WI/ | 66.5K | 138M | 新進 | 新進 |
| GENDELL JEFFREY L | 59.2K | 123M | 新進 | 新進 |
| Boston Partners | 55.6K | 115M | 新進 | 新進 |
| LONDON CO OF VIRGINIA | 54.0K | 112M | 新進 | 新進 |
| STATE STREET CORP | 50.3K | 104M | 新進 | 新進 |
| GEODE CAPITAL MANAGEMENT, LLC | 49.4K | 102M | 新進 | 新進 |
| MORGAN STANLEY | 46.9K | 97.2M | 新進 | 新進 |
| REINHART PARTNERS, LLC. | 44.5K | 92.3M | 新進 | 新進 |
| AMERICAN CENTURY COMPANIES INC | 31.1K | 64.5M | 新進 | 新進 |
| 挪威主權基金 NORGES BANK | 28.0K | 58.0M | 新進 | 新進 |
| Cannell & Spears LLC | 27.6K | 57.2M | 新進 | 新進 |
| BANK OF AMERICA CORP /DE/ | 25.0K | 51.9M | 新進 | 新進 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 23.5K | 48.7M | 新進 | 新進 |
| Mraz, Amerine & Associates, Inc. | 22.2K | 46.1M | 新進 | 新進 |
| Allspring Global Investments Holdings, LLC | 18.1K | 37.4M | 新進 | 新進 |
| Gotham Asset Management, LLC | 17.9K | 37.2M | 新進 | 新進 |
持有機構數近 12 季
每季 13F 申報中持有本股的機構家數;綠柱 = 比上季少。機構數是「有多少人在船上」,不是「買了多少」。
| 持有機構 · 季變化 | 356 -12 |
|---|---|
| 新進 / 出清 / 加碼 / 減碼 | 356 / 0 / 0 / 0 |
| 機構合計持股 · 佔流通股 | 2.2M · 92.3% |
| 合計季末市值 | 4.4B |
13F 只申報多頭部位(含可轉債與選擇權,選擇權這裡已排除),不申報放空,也不申報 1 億美元以下的機構。同一集團多個申報主體會各算一家。
放空餘額 FINRA 每月兩次(15 日與月底結算)· 最新 2026-08-31
空單佔流通股近 13 個月
FINRA 每月兩次結算的空單餘額佔流通股數的比例,近 13 個月。滑到柱子看股數與回補天數。
最新一期
| 空單股數 | 132K |
|---|---|
| 與上期比 | -3.4% |
| 佔流通股數 | 5.52% |
| 日均成交量 | 20.3K |
| 回補天數 | 6.5 天 |
空單佔比 10% 以上算高、20% 以上算很高(這是通行的說法,不是本站的判斷)。回補天數 = 空單 ÷ 日均量,天數愈長,空方要出場時愈容易推升股價。
放空餘額是「有人借股票賣掉還沒還」的存量,不代表看空的人正在加碼;避險基金做多空配對時也會產生空單。
| 結算日 | 空單股數 | 與上期比 | 佔流通股 | 日均量 | 回補天數 |
|---|---|---|---|---|---|
| 2026-08-31 | 132K | -3.4% | 5.52% | 20.3K | 6.5 |
| 2026-08-14 | 136K | -0.5% | 5.71% | 24.0K | 5.7 |
| 2026-07-31 | 137K | -1.0% | 5.74% | 16.1K | 8.5 |
| 2026-07-15 | 138K | +10.9% | 5.79% | 18.7K | 7.4 |
| 2026-06-30 | 125K | +4.6% | 5.23% | 18.2K | 6.9 |
| 2026-06-15 | 119K | +31.1% | 5.00% | 26.4K | 4.5 |
| 2026-05-29 | 91.0K | +3.4% | 3.81% | 22.0K | 4.1 |
| 2026-05-15 | 88.0K | +12.7% | 3.69% | 23.8K | 3.7 |
| 2026-04-30 | 78.0K | +8.8% | 3.27% | 13.2K | 5.9 |
| 2026-04-15 | 71.7K | -12.8% | 3.00% | 18.7K | 3.8 |
| 2026-03-31 | 82.2K | -6.1% | 3.45% | 17.9K | 4.6 |
| 2026-03-13 | 87.6K | +16.6% | 3.67% | 21.2K | 4.1 |
| 2026-02-27 | 75.1K | +8.2% | 3.15% | 16.3K | 4.6 |
| 2026-02-13 | 69.4K | -14.7% | 2.91% | 17.8K | 3.9 |
| 2026-01-30 | 81.4K | +12.9% | 3.41% | 15.9K | 5.1 |
| 2026-01-15 | 72.1K | +11.3% | 3.02% | 18.7K | 3.9 |
| 2025-12-31 | 64.8K | -25.6% | 2.71% | 18.2K | 3.6 |
| 2025-12-15 | 87.1K | -20.7% | 3.65% | 22.0K | 4.0 |
| 2025-11-28 | 110K | +15.1% | 4.60% | 18.9K | 5.8 |
| 2025-11-14 | 95.4K | -11.6% | 4.00% | 22.8K | 4.2 |
| 2025-10-31 | 108K | +14.0% | 4.52% | 25.7K | 4.2 |
| 2025-10-15 | 94.6K | +16.8% | 3.96% | 37.9K | 2.5 |
| 2025-09-30 | 81.0K | +23.6% | 3.39% | 35.1K | 2.3 |
| 2025-09-15 | 65.5K | +1.6% | 2.74% | 35.6K | 1.8 |
| 2025-08-29 | 64.5K | -9.1% | 2.70% | 26.6K | 2.4 |
| 2025-08-15 | 70.9K | +23.7% | 2.97% | 29.7K | 2.4 |