White Mountains Insurance Group, Ltd. (WTM)
NYSE: WTM · Real-Time Price · USD
1,715.50
+0.10 (0.01%)
At close: Sep 16, 2025, 4:00 PM EDT
1,714.51
-0.99 (-0.06%)
Pre-market: Sep 17, 2025, 5:01 AM EDT
WTM Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Sep 16, 2025 | 1,712.78 | 1,719.40 | 1,700.00 | 1,715.50 | 1,715.50 | 0.01% | 29,376 |
| Sep 15, 2025 | 1,760.00 | 1,772.00 | 1,711.28 | 1,715.40 | 1,715.40 | -2.69% | 40,379 |
| Sep 12, 2025 | 1,765.00 | 1,785.77 | 1,762.81 | 1,762.81 | 1,762.81 | -0.66% | 26,557 |
| Sep 11, 2025 | 1,752.00 | 1,774.51 | 1,752.00 | 1,774.51 | 1,774.51 | 0.80% | 33,590 |
| Sep 10, 2025 | 1,779.68 | 1,790.00 | 1,752.88 | 1,760.48 | 1,760.48 | -1.91% | 37,377 |
| Sep 9, 2025 | 1,767.16 | 1,800.06 | 1,762.71 | 1,794.69 | 1,794.69 | 1.56% | 82,797 |
| Sep 8, 2025 | 1,785.00 | 1,800.00 | 1,748.41 | 1,767.16 | 1,767.16 | -1.61% | 30,853 |
| Sep 5, 2025 | 1,797.67 | 1,816.00 | 1,792.00 | 1,796.03 | 1,796.03 | -0.25% | 20,905 |
| Sep 4, 2025 | 1,772.52 | 1,800.51 | 1,767.15 | 1,800.51 | 1,800.51 | 1.58% | 26,917 |
| Sep 3, 2025 | 1,795.00 | 1,819.69 | 1,763.92 | 1,772.52 | 1,772.52 | -3.49% | 32,332 |
| Sep 2, 2025 | 1,815.00 | 1,842.08 | 1,804.00 | 1,836.59 | 1,836.59 | 0.35% | 23,837 |
| Aug 29, 2025 | 1,837.00 | 1,839.31 | 1,830.18 | 1,830.18 | 1,830.18 | 0.26% | 20,507 |
| Aug 28, 2025 | 1,825.00 | 1,850.00 | 1,822.00 | 1,825.39 | 1,825.39 | -1.09% | 25,034 |
| Aug 27, 2025 | 1,838.14 | 1,850.82 | 1,824.30 | 1,845.42 | 1,845.42 | 0.53% | 37,180 |
| Aug 26, 2025 | 1,810.00 | 1,836.21 | 1,810.00 | 1,835.69 | 1,835.69 | 0.42% | 27,026 |
| Aug 25, 2025 | 1,830.00 | 1,840.00 | 1,809.90 | 1,828.05 | 1,828.05 | -1.89% | 24,360 |
| Aug 22, 2025 | 1,856.00 | 1,868.36 | 1,848.37 | 1,863.22 | 1,863.22 | 1.18% | 24,089 |
| Aug 21, 2025 | 1,832.31 | 1,847.39 | 1,831.00 | 1,841.41 | 1,841.41 | 0.25% | 20,379 |
| Aug 20, 2025 | 1,809.00 | 1,841.21 | 1,809.00 | 1,836.89 | 1,836.89 | 1.31% | 26,023 |
| Aug 19, 2025 | 1,777.38 | 1,813.53 | 1,777.38 | 1,813.09 | 1,813.09 | 2.81% | 28,565 |
| Aug 18, 2025 | 1,775.00 | 1,779.02 | 1,758.68 | 1,763.47 | 1,763.47 | -0.35% | 32,776 |
| Aug 15, 2025 | 1,838.00 | 1,848.31 | 1,762.71 | 1,769.60 | 1,769.60 | -4.05% | 41,912 |
| Aug 14, 2025 | 1,865.00 | 1,867.47 | 1,840.00 | 1,844.34 | 1,844.34 | -1.36% | 30,109 |
| Aug 13, 2025 | 1,837.55 | 1,880.11 | 1,819.00 | 1,869.81 | 1,869.81 | 2.48% | 21,933 |
| Aug 12, 2025 | 1,786.79 | 1,828.03 | 1,779.00 | 1,824.59 | 1,824.59 | 2.30% | 29,559 |
| Aug 11, 2025 | 1,746.00 | 1,791.18 | 1,744.00 | 1,783.51 | 1,783.51 | 1.82% | 37,429 |
| Aug 8, 2025 | 1,759.00 | 1,789.00 | 1,750.21 | 1,751.62 | 1,751.62 | 0.07% | 24,358 |
| Aug 7, 2025 | 1,770.11 | 1,776.92 | 1,747.60 | 1,750.35 | 1,750.35 | -1.82% | 49,066 |
| Aug 6, 2025 | 1,774.96 | 1,795.47 | 1,756.00 | 1,782.71 | 1,782.71 | -0.13% | 32,014 |
| Aug 5, 2025 | 1,779.43 | 1,788.30 | 1,777.24 | 1,785.01 | 1,785.01 | 0.59% | 21,222 |
| Aug 4, 2025 | 1,777.87 | 1,790.00 | 1,774.15 | 1,774.50 | 1,774.50 | -0.02% | 22,713 |
| Aug 1, 2025 | 1,779.93 | 1,779.93 | 1,762.00 | 1,774.87 | 1,774.87 | -0.72% | 16,873 |
| Jul 31, 2025 | 1,790.00 | 1,796.80 | 1,780.57 | 1,787.80 | 1,787.80 | 0.51% | 16,119 |
| Jul 30, 2025 | 1,796.00 | 1,801.00 | 1,773.20 | 1,778.73 | 1,778.73 | -1.01% | 15,594 |
| Jul 29, 2025 | 1,796.90 | 1,796.90 | 1,785.53 | 1,796.89 | 1,796.89 | 0.41% | 12,058 |
| Jul 28, 2025 | 1,780.00 | 1,789.56 | 1,780.00 | 1,789.56 | 1,789.56 | - | 13,668 |
| Jul 25, 2025 | 1,785.10 | 1,794.00 | 1,782.94 | 1,789.58 | 1,789.58 | 0.66% | 12,089 |
| Jul 24, 2025 | 1,785.39 | 1,785.39 | 1,777.88 | 1,777.88 | 1,777.88 | -0.58% | 15,685 |
| Jul 23, 2025 | 1,789.10 | 1,789.10 | 1,780.52 | 1,788.21 | 1,788.21 | -0.18% | 13,871 |
| Jul 22, 2025 | 1,770.50 | 1,799.44 | 1,770.50 | 1,791.35 | 1,791.35 | 0.71% | 21,041 |
| Jul 21, 2025 | 1,820.00 | 1,820.00 | 1,776.21 | 1,778.74 | 1,778.74 | -2.06% | 16,789 |
| Jul 18, 2025 | 1,819.50 | 1,824.80 | 1,801.67 | 1,816.20 | 1,816.20 | 0.23% | 26,946 |
| Jul 17, 2025 | 1,774.00 | 1,812.00 | 1,774.00 | 1,812.00 | 1,812.00 | 1.91% | 28,542 |
| Jul 16, 2025 | 1,800.00 | 1,820.75 | 1,778.00 | 1,778.00 | 1,778.00 | -0.84% | 34,328 |
| Jul 15, 2025 | 1,823.00 | 1,823.00 | 1,793.11 | 1,793.11 | 1,793.11 | -2.06% | 25,176 |
| Jul 14, 2025 | 1,809.70 | 1,831.19 | 1,805.10 | 1,830.85 | 1,830.85 | 1.62% | 24,898 |
| Jul 11, 2025 | 1,787.76 | 1,801.74 | 1,787.00 | 1,801.74 | 1,801.74 | 0.28% | 22,480 |
| Jul 10, 2025 | 1,803.00 | 1,807.94 | 1,788.14 | 1,796.69 | 1,796.69 | -0.40% | 45,277 |
| Jul 9, 2025 | 1,820.71 | 1,820.71 | 1,798.76 | 1,803.82 | 1,803.82 | 0.30% | 28,739 |
| Jul 8, 2025 | 1,794.03 | 1,815.00 | 1,793.88 | 1,798.47 | 1,798.47 | 0.77% | 51,058 |