NYSE · WTM · stock
White Mountains Insurance Group Ltd. (WTM) stock price history
Every NYSE trading session of White Mountains Insurance Group Ltd. from Oct 23, 1985 to Nov 12, 2026: 10,320 daily bars, adjusted for splits and dividends, with minute bars from Jul 13, 2026 forward. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
WTM adjusted close, 1985 to 2026
- $2,376
- All time high, 2026
- $2,379
- 52 week high, $1,869 low
- 10,320
- Daily sessions since 1985
Last updated Nov 12, 2026, the last stored session. Refreshes after each trading day. Full 1985 to 2026 series and minute bars.
WTM key facts
- White Mountains Insurance Group Ltd. (WTM) closed at $2,247 on Nov 12, 2026 on NYSE.
- WTM's all time high close is $2,376, set on Nov 4, 2026; its all time low close is $19.74 on Dec 11, 1987.
- WTM's 52 week range is $1,869 to $2,379.
- WTM returned +16.2% over the year to Nov 12, 2026 and +102.5% over five years.
- Over ten years WTM returned +174%, +10.6% a year compounded.
- WTM's deepest drawdown was -77.7% from Sep 8, 2005 to Mar 9, 2009.
- DataCedar holds 10,320 daily sessions of WTM history from Oct 23, 1985 and minute bars from Jul 13, 2026, adjusted for splits and dividends, served by the API under a key.
WTM price chart, 1985 to 2026
WTM returns
Price return from the last close on or before the window start to Nov 12, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | +7.7% |
| 3 months | +6.0% |
| 6 months | +6.5% |
| Year to date | +8.1% |
| 1 year | +16.2% |
| 3 years | +49.0% |
| 5 years | +102.5% |
| 10 years | +173.7% |
| Since Oct 23, 1985 | +9,973% |
| Compound annual growth, 41.1 years | +11.9% |
WTM records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- $2,376 on Nov 4, 2026
- All time low close
- $19.74 on Dec 11, 1987
- 52 week high
- $2,379 on Nov 4, 2026
- 52 week low
- $1,869 on Nov 19, 2025
- Deepest drawdown
- -77.7% from Sep 8, 2005 to Mar 9, 2009, recovered Dec 8, 2014
- Best single session
- +30.5% on Aug 2, 1990
- Worst single session
- -17.9% on Dec 23, 1993
- Volatility, 1 year annualised
- 20.0%
- Sessions closing higher, 1 year
- 50%
- Growth of 1 since 1985
- 101×
- Best calendar year
- 2000, +167%
- Worst calendar year
- 2008, -48%
WTM price history by year
Open is the first session's open, high and low span the year, close is the last session's close, and the return is close over the previous year's close. 1985 starts on Oct 23, 1985; 2026 runs to Nov 12, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | $2,083 | $2,379 | $1,987 | $2,247 | +8.2% | 4.3M | 218 |
| 2025 | $1,949 | $2,142 | $1,647 | $2,077 | +6.9% | 5.5M | 250 |
| 2024 | $1,496 | $2,021 | $1,473 | $1,943 | +29.3% | 2.8M | 252 |
| 2023 | $1,409 | $1,614 | $1,310 | $1,503 | +6.5% | 2.4M | 250 |
| 2022 | $1,027 | $1,432 | $979.43 | $1,411 | +39.6% | 3.8M | 251 |
| 2021 | $998.25 | $1,262 | $975.35 | $1,011 | +1.4% | 5.2M | 252 |
| 2020 | $1,112 | $1,162 | $626.65 | $996.58 | -10.2% | 4.1M | 253 |
| 2019 | $847.56 | $1,126 | $845.33 | $1,110 | +30.2% | 3.7M | 252 |
| 2018 | $846.00 | $974.64 | $780.26 | $852.23 | +0.9% | 6M | 251 |
| 2017 | $830.09 | $940.70 | $826.96 | $844.82 | +1.9% | 4.8M | 251 |
| 2016 | $720.77 | $867.10 | $682.47 | $828.79 | +15.2% | 4.1M | 252 |
| 2015 | $619.84 | $799.98 | $610.94 | $719.60 | +15.5% | 3.4M | 252 |
| 2014 | $595.96 | $675.07 | $549.95 | $622.91 | +4.7% | 3.3M | 252 |
| 2013 | $511.16 | $607.80 | $507.36 | $595.17 | +17.3% | 2.1M | 252 |
| 2012 | $448.31 | $541.79 | $429.18 | $507.33 | +13.8% | 2M | 250 |
| 2011 | $332.22 | $446.13 | $332.22 | $445.81 | +35.5% | 4.5M | 252 |
| 2010 | $327.49 | $356.22 | $289.11 | $329.00 | +1.2% | 4.7M | 252 |
| 2009 | $256.90 | $332.38 | $141.90 | $325.20 | +25.4% | 9.3M | 252 |
| 2008 | $493.84 | $509.91 | $189.39 | $259.43 | -47.6% | 6.1M | 253 |
| 2007 | $547.43 | $581.84 | $471.84 | $494.89 | -10.0% | 4.8M | 251 |
| 2006 | $521.74 | $570.14 | $421.02 | $549.73 | +5.3% | 4.1M | 251 |
| 2005 | $596.14 | $661.11 | $518.70 | $522.02 | -12.4% | 3.3M | 252 |
| 2004 | $423.58 | $608.14 | $415.80 | $596.14 | +40.7% | 2.1M | 252 |
| 2003 | $296.53 | $427.31 | $281.83 | $423.58 | +42.9% | 2.7M | 252 |
| 2002 | $319.42 | $348.39 | $258.88 | $296.52 | -6.9% | 1.7M | 252 |
| 2001 | $290.09 | $358.77 | $259.99 | $318.50 | +9.4% | 1.7M | 248 |
| 2000 | $108.72 | $291.92 | $92.19 | $291.01 | +167.1% | 2.1M | 252 |
| 1999 | $125.48 | $134.37 | $103.62 | $108.95 | -12.9% | 1.9M | 249 |
| 1998 | $107.67 | $136.02 | $104.19 | $125.09 | +17.1% | 1.1M | 251 |
| 1997 | $84.97 | $109.43 | $82.35 | $106.78 | +27.3% | 1.6M | 253 |
| 1996 | $64.76 | $83.88 | $62.91 | $83.88 | +29.1% | 2.1M | 254 |
| 1995 | $63.02 | $66.29 | $57.57 | $64.98 | +3.1% | 1.8M | 251 |
| 1994 | $68.25 | $69.34 | $52.33 | $63.02 | -8.0% | 2.3M | 252 |
| 1993 | $62.80 | $80.68 | $62.36 | $68.47 | +9.0% | 3.6M | 252 |
| 1992 | $60.84 | $64.98 | $54.51 | $62.80 | +3.0% | 8.3M | 246 |
| 1991 | $44.44 | $61.27 | $43.47 | $60.95 | +36.2% | 20.6M | 252 |
| 1990 | $29.34 | $44.87 | $25.13 | $44.76 | +52.0% | 37.7M | 253 |
| 1989 | $24.45 | $34.38 | $24.14 | $29.44 | +20.9% | 26.6M | 250 |
| 1988 | $21.07 | $27.76 | $21.07 | $24.35 | +15.6% | 26.6M | 253 |
| 1987 | $28.41 | $34.66 | $19.74 | $21.07 | -25.8% | 49M | 251 |
| 1986 | $24.81 | $35.76 | $24.61 | $28.41 | +14.5% | 43.9M | 248 |
| 1985 | $20.80 | $27.23 | $20.80 | $24.81 | n/a | 18.5M | 48 |
WTM monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| November 2026 | $2,247 | -1.0% |
| October 2026 | $2,270 | +13.1% |
| September 2026 | $2,006 | -4.5% |
| August 2026 | $2,102 | +0.2% |
| July 2026 | $2,098 | +1.2% |
| June 2026 | $2,073 | +0.4% |
| May 2026 | $2,065 | -7.5% |
| April 2026 | $2,232 | +1.6% |
| March 2026 | $2,197 | -1.0% |
| February 2026 | $2,219 | +8.6% |
| January 2026 | $2,044 | -1.6% |
| December 2025 | $2,077 | +2.7% |
About the WTM data
Daily bars. 10,320 sessions from Oct 23, 1985 to Nov 12, 2026, one row per NYSE trading day with open, high, low, close and volume. Prices are adjusted for splits and cash dividends so the series is comparable across its whole length; the API also serves the raw, split only and dividend only views.
Minute bars. Stored from Jul 13, 2026 forward, most recent session Oct 23, 2026. Minute history is captured from the day collection began and is never backfilled, so this start date is exact. Five minute, fifteen minute and hourly bars are derived from these minutes.
Time and currency. Session dates are NYSE trading days; minute timestamps are UTC. Prices are in USD. Volume is shares traded on the session.
Get the data. The REST endpoint returns the daily series as JSON with pagination; a free key serves the last year, Quant and above the full history back to Oct 23, 1985, and minute bars come with the paid windows. It takes timeframe (1Min, 5Min, 15Min, 1Hour, 1Day), adjustment, start and end. See the bars endpoint and authentication, and pricing for the plan windows.
curl "https://api.datacedar.com/v3/stocks/nyse%3AWTM/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on NYSE
Common questions
WTM share price history
