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WTM Insider Trading

Insider Ownership Percentage: 3.20%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $0.00

White Mountains Insurance Group Insider Trading History Chart

This chart shows the insider buying and selling history at White Mountains Insurance Group by year and by quarter.

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White Mountains Insurance Group Share Price & Price History

Current Price: $2,034.11
Price Change: ▲ Price Increase of +8.562 (0.42%)
As of 12/4/2025 04:59 PM ET

This chart shows the closing price history over time for WTM up to the past year.

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Days: 30 | 90 | 365

White Mountains Insurance Group Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
5/7/2024Mountains Insurance Grou WhiteMajor ShareholderSell5,000,200$19.00$95,003,800.0017,856,614View SEC Filing Icon  
11/17/2023Weston M. HicksDirectorBuy1,000$1,480.56$1,480,560.002,306View SEC Filing Icon  
6/30/2023Mountains Insurance Grou WhiteDirectorBuy5,916,816$10.00$59,168,160.0022,856,814View SEC Filing Icon  
12/22/2022Michaela J. HildrethCAOSell100$1,371.84$137,184.001,463View SEC Filing Icon  
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SEC Filings (Institutional Ownership Changes) for White Mountains Insurance Group (NYSE:WTM)

88.65% of White Mountains Insurance Group stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at WTM by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

White Mountains Insurance Group Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
12/2/2025Allworth Financial LP35$59K0.0%+25.0%0.001%Search for SEC Filing on Google Icon
11/20/2025Speece Thorson Capital Group Inc.11,262$18.83M3.8%-1.1%0.441%Search for SEC Filing on Google Icon
11/20/2025Wilmington Savings Fund Society FSB209$0.35M0.0%+49.3%0.008%Search for SEC Filing on Google Icon
11/18/2025Advisory Services Network LLC45$75K0.0%N/A0.002%Search for SEC Filing on Google Icon
11/17/2025Susquehanna International Group LLP7,360$12.30M0.0%+2,455.6%0.288%Search for SEC Filing on Google Icon
11/17/2025Quarry LP31$52K0.0%N/A0.001%Search for SEC Filing on Google Icon
11/17/2025Qube Research & Technologies Ltd636$1.06M0.0%-64.5%0.025%Search for SEC Filing on Google Icon
11/17/2025Mariner LLC214$0.36M0.0%-71.2%0.008%Search for SEC Filing on Google Icon
11/17/2025Mercer Global Advisors Inc. ADV147$0.25M0.0%+24.6%0.006%Search for SEC Filing on Google Icon
11/17/2025Millennium Management LLC934$1.56M0.0%-32.9%0.037%Search for SEC Filing on Google Icon
11/17/2025London Co. of Virginia66,802$111.68M0.6%-2.9%2.617%Search for SEC Filing on Google Icon
11/17/2025Lighthouse Investment Partners LLC2,939$4.91M0.1%N/A0.115%Search for SEC Filing on Google Icon
11/17/2025Holocene Advisors LP839$1.40M0.0%N/A0.033%Search for SEC Filing on Google Icon
11/17/2025Gotham Asset Management LLC6,899$11.53M0.1%+618.6%0.270%Search for SEC Filing on Google Icon
11/17/2025Focus Partners Wealth1,353$2.26M0.0%-15.2%0.053%Search for SEC Filing on Google Icon
11/17/2025Elevation Point Wealth Partners LLC157$0.26M0.0%+106.6%0.006%Search for SEC Filing on Google Icon
11/17/2025Citadel Advisors LLC281$0.47M0.0%-76.0%0.011%Search for SEC Filing on Google Icon
11/17/2025Cannell & Spears LLC28,288$47.28M0.9%-0.2%1.108%Search for SEC Filing on Google Icon
11/17/2025California Public Employees Retirement System9,232$15.43M0.0%-11.2%0.362%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE38,812$64.88M0.0%-1.5%1.520%Search for SEC Filing on Google Icon
11/17/2025Bank of Nova Scotia202$0.34M0.0%+3.1%0.008%Search for SEC Filing on Google Icon
11/17/2025Aquatic Capital Management LLC765$1.28M0.0%N/A0.030%Search for SEC Filing on Google Icon
11/17/2025Alliancebernstein L.P.955$1.60M0.0%-15.3%0.037%Search for SEC Filing on Google Icon
11/17/2025Ameriprise Financial Inc.3,028$5.06M0.0%-13.0%0.119%Search for SEC Filing on Google Icon
11/14/2025Creative Planning3,102$5.19M0.0%+9.1%0.122%Search for SEC Filing on Google Icon
11/14/2025Zacks Investment Management157$0.26M0.0%+6.1%0.006%Search for SEC Filing on Google Icon
11/14/2025Raymond James Financial Inc.29,392$49.13M0.0%-4.2%1.151%Search for SEC Filing on Google Icon
11/14/2025Virtu Financial LLC309$0.52M0.0%N/A0.012%Search for SEC Filing on Google Icon
11/14/2025Freestone Grove Partners LP144$0.24M0.0%N/A0.006%Search for SEC Filing on Google Icon
11/14/2025Hotchkis & Wiley Capital Management LLC7,106$11.88M0.0%+3.5%0.278%Search for SEC Filing on Google Icon
11/14/2025California State Teachers Retirement System2,433$4.07M0.0%+2.6%0.095%Search for SEC Filing on Google Icon
11/14/2025Tower Research Capital LLC TRC 420$0.70M0.0%+121.1%0.016%Search for SEC Filing on Google Icon
11/14/2025Squarepoint Ops LLC178$0.30M0.0%-36.2%0.007%Search for SEC Filing on Google Icon
11/14/2025Wellington Management Group LLP19,211$32.11M0.0%-22.1%0.752%Search for SEC Filing on Google Icon
11/14/2025Nicolet Advisory Services LLC213$0.36M0.0%N/A0.008%Search for SEC Filing on Google Icon
11/14/2025Cove Street Capital LLC1,083$1.81M2.4%+128.5%0.042%Search for SEC Filing on Google Icon
11/14/2025Glenmede Investment Management LP362$0.61M0.0%-3.2%0.014%Search for SEC Filing on Google Icon
11/13/2025Boston Partners84,445$142.52M0.1%-5.5%3.308%Search for SEC Filing on Google Icon
11/13/2025Legacy Advisors LLC450$0.75M0.1%N/A0.018%Search for SEC Filing on Google Icon
11/13/2025Vise Technologies Inc.190$0.32M0.0%-3.1%0.007%Search for SEC Filing on Google Icon
11/13/2025Invesco Ltd.3,317$5.54M0.0%-9.0%0.130%Search for SEC Filing on Google Icon
11/13/2025Sei Investments Co.5,386$9M0.0%+9.8%0.211%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG12,085$20.20M0.0%+141.1%0.473%Search for SEC Filing on Google Icon
11/13/2025BNP Paribas Financial Markets1,536$2.57M0.0%+717.0%0.060%Search for SEC Filing on Google Icon
11/13/2025Franklin Resources Inc.396$0.66M0.0%-8.8%0.016%Search for SEC Filing on Google Icon
11/13/2025Magnetar Financial LLC881$1.47M0.0%N/A0.035%Search for SEC Filing on Google Icon
11/13/2025Legal & General Group Plc4,049$6.77M0.0%-6.0%0.159%Search for SEC Filing on Google Icon
11/13/2025Russell Investments Group Ltd.351$0.59M0.0%+200.0%0.014%Search for SEC Filing on Google Icon
11/13/2025Inceptionr LLC185$0.31M0.1%N/A0.007%Search for SEC Filing on Google Icon
11/13/2025Ameriflex Group Inc.20$33K0.0%N/A0.001%Search for SEC Filing on Google Icon
11/13/2025HUB Investment Partners LLC160$0.27M0.0%N/A0.006%Search for SEC Filing on Google Icon
11/12/2025Barclays PLC952$1.59M0.0%-71.9%0.037%Search for SEC Filing on Google Icon
11/12/2025GW&K Investment Management LLC8,010$13.39M0.1%-3.2%0.314%Search for SEC Filing on Google Icon
11/12/2025Dimensional Fund Advisors LP157,217$262.79M0.1%+0.9%6.158%Search for SEC Filing on Google Icon
11/12/2025Cresset Asset Management LLC298$0.50M0.0%+3.5%0.012%Search for SEC Filing on Google Icon
11/12/2025Teachers Retirement System of The State of Kentucky767$1.28M0.0%-36.5%0.030%Search for SEC Filing on Google Icon
11/12/2025Victory Capital Management Inc.8,526$14.25M0.0%-51.7%0.334%Search for SEC Filing on Google Icon
11/12/2025Royce & Associates LP6,302$10.53M0.1%-4.6%0.247%Search for SEC Filing on Google Icon
11/12/2025Handelsbanken Fonder AB1,100$1.84M0.0%+83.3%0.043%Search for SEC Filing on Google Icon
11/12/2025Choreo LLC396$0.66M0.0%+128.9%0.016%Search for SEC Filing on Google Icon
11/12/2025US Bancorp DE123$0.21M0.0%+7.0%0.005%Search for SEC Filing on Google Icon
11/10/2025Bradley Foster & Sargent Inc. CT5,546$9.27M0.1%+0.4%0.215%Search for SEC Filing on Google Icon
11/10/2025TD Asset Management Inc1,166$1.95M0.0%-27.9%0.045%Search for SEC Filing on Google Icon
11/10/2025EverSource Wealth Advisors LLC30$50K0.0%-30.2%0.001%Search for SEC Filing on Google Icon
11/10/2025Clearstead Advisors LLC31$52K0.0%-42.6%0.001%Search for SEC Filing on Google Icon
11/10/2025Vestmark Advisory Solutions Inc.157$0.26M0.0%N/A0.006%Search for SEC Filing on Google Icon
11/10/2025Citigroup Inc.1,489$2.49M0.0%+9.3%0.058%Search for SEC Filing on Google Icon
11/7/2025King Luther Capital Management Corp560$0.94M0.0%-6.7%0.022%Search for SEC Filing on Google Icon
11/7/2025Prospector Partners LLC3,783$6.32M0.8%-7.2%0.147%Search for SEC Filing on Google Icon
11/7/2025NewEdge Wealth LLC117$0.20M0.0%N/A0.005%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.247,004$412.87M0.0%-0.9%9.592%Search for SEC Filing on Google Icon
11/7/2025Texas Yale Capital Corp.680$1.14M0.0%N/A0.026%Search for SEC Filing on Google Icon
11/7/2025JPMorgan Chase & Co.4,322$7.22M0.0%+86.1%0.168%Search for SEC Filing on Google Icon
11/7/2025State of New Jersey Common Pension Fund D1,155$1.93M0.0%+10.2%0.045%Search for SEC Filing on Google Icon
11/6/2025Mraz Amerine & Associates Inc.22,606$37.79M5.9%+4.8%0.878%Search for SEC Filing on Google Icon
11/6/2025Wedbush Securities Inc.224$0.37M0.0%+6.2%0.009%Search for SEC Filing on Google Icon
11/6/2025Leuthold Group LLC1,206$2.02M0.2%+3.5%0.047%Search for SEC Filing on Google Icon
11/6/2025Caprock Group LLC492$0.90M0.0%N/A0.019%Search for SEC Filing on Google Icon
11/6/2025Rhumbline Advisers4,232$7.07M0.0%-1.1%0.164%Search for SEC Filing on Google Icon
11/6/2025Oppenheimer Asset Management Inc.1,572$2.63M0.0%+15.3%0.061%Search for SEC Filing on Google Icon
11/5/2025Envestnet Asset Management Inc.17,591$29.40M0.0%+0.5%0.683%Search for SEC Filing on Google Icon
11/4/2025WCM Investment Management LLC13,235$22.20M0.0%+1.1%0.514%Search for SEC Filing on Google Icon
11/4/2025Atlantic Union Bankshares Corp1,765$2.95M0.1%N/A0.069%Search for SEC Filing on Google Icon
11/4/2025AGF Management Ltd.1,780$2.98M0.0%+33.6%0.069%Search for SEC Filing on Google Icon
11/4/2025Midwest Professional Planners LTD.622$1.04M0.3%-1.0%0.024%Search for SEC Filing on Google Icon
11/4/2025Keybank National Association OH167$0.28M0.0%+5.7%0.006%Search for SEC Filing on Google Icon
11/3/2025Arizona State Retirement System762$1.27M0.0%+1.5%0.030%Search for SEC Filing on Google Icon
11/3/2025LRI Investments LLC82$0.14M0.0%-8.9%0.003%Search for SEC Filing on Google Icon
11/3/2025Truist Financial Corp1,173$1.96M0.0%-5.4%0.046%Search for SEC Filing on Google Icon
11/3/2025One Wealth Advisors LLC183$0.31M0.0%-14.9%0.007%Search for SEC Filing on Google Icon
10/31/2025Riverwater Partners LLC190$0.32M0.1%+33.8%0.007%Search for SEC Filing on Google Icon
10/31/2025National Wealth Management Group LLC208$0.35M0.1%N/A0.008%Search for SEC Filing on Google Icon
10/31/2025Vanguard Personalized Indexing Management LLC240$0.40M0.0%+3.0%0.009%Search for SEC Filing on Google Icon
10/31/2025Cooke & Bieler LP107,851$180.28M1.9%+40.5%4.188%Search for SEC Filing on Google Icon
10/31/2025Resona Asset Management Co. Ltd.452$0.76M0.0%-7.2%0.018%Search for SEC Filing on Google Icon
10/30/2025Envestnet Portfolio Solutions Inc.254$0.43M0.0%-22.3%0.010%Search for SEC Filing on Google Icon
10/30/2025Strs Ohio60$100K0.0%-96.2%0.002%Search for SEC Filing on Google Icon
10/30/2025Covestor Ltd28$48K0.0%+366.7%0.001%Search for SEC Filing on Google Icon
10/30/2025Universal Beteiligungs und Servicegesellschaft mbH292$0.49M0.0%+27.0%0.011%Search for SEC Filing on Google Icon
10/29/2025Parsons Capital Management Inc. RI1,882$3.15M0.2%-0.5%0.073%Search for SEC Filing on Google Icon
Data available starting January 2016

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White Mountains Insurance Group logo
White Mountains Insurance Group, Ltd., through its subsidiaries, provides insurance and other financial services in the United States. The company operates through HG Global/BAM, Ark/WM Outrigger, Kudu, and Other Operations segments. The HG Global/BAM segment provides insurance on municipal bonds issued to finance public purposes, such as schools, utilities, and transportation facilities, as well as reinsurance protection services. The Ark/WM Outrigger segment offers reinsurance and insurance, including property, marine and energy, accident and health, casualty, and specialty products. The Kudu segment provides capital solutions to boutique asset and wealth managers for generational ownership transfers, management buyouts, acquisitions and growth finances, and legacy partner liquidity, as well as strategic assistance to investees. The Other Operations segment offers insurance solutions to travel industry through broker channel and on a direct-to-consumer basis; and manages separate accounts and pooled investment vehicles for insurance-linked securities sectors, including catastrophe bonds, collateralized reinsurance investments, and industry loss warranties of third-party clients. White Mountains Insurance Group, Ltd. was incorporated in 1980 and is headquartered in Hamilton, Bermuda.
Read More on White Mountains Insurance Group

Today's Range

Now: $2,034.11
Low: $2,020.05
High: $2,050.90

50 Day Range

MA: $1,904.78
Low: $1,648.88
High: $2,034.11

52 Week Range

Now: $2,034.11
Low: $1,648.00
High: $2,050.90

Volume

17,755 shs

Average Volume

18,677 shs

Market Capitalization

$5.17 billion

P/E Ratio

37.43

Dividend Yield

0.05%

Beta

0.36

Who are the company insiders with the largest holdings of White Mountains Insurance Group?

White Mountains Insurance Group's top insider shareholders include:
  1. Mountains Insurance Grou White (Major Shareholder)
Learn More about top insider investors at White Mountains Insurance Group.

Who are the major institutional investors of White Mountains Insurance Group?

White Mountains Insurance Group's top institutional shareholders include:
  1. Vanguard Group Inc. — 9.59%
  2. Dimensional Fund Advisors LP — 6.16%
  3. Cooke & Bieler LP — 4.19%
  4. Boston Partners — 3.31%
  5. London Co. of Virginia — 2.62%
  6. Reinhart Partners LLC. — 1.62%
Learn More about top institutional investors of White Mountains Insurance Group stock.

Which major investors are selling White Mountains Insurance Group stock?

In the previous quarter, WTM stock was sold by these institutional investors:
  1. Victory Capital Management Inc.
  2. Wellington Management Group LLP
  3. Boston Partners
  4. Barclays PLC
  5. Vanguard Group Inc.
  6. Harbor Capital Advisors Inc.
  7. London Co. of Virginia
  8. Strs Ohio

Which major investors are buying White Mountains Insurance Group stock?

During the last quarter, WTM stock was purchased by institutional investors including:
  1. Cooke & Bieler LP
  2. UBS Group AG
  3. Susquehanna International Group LLP
  4. Gotham Asset Management LLC
  5. Lighthouse Investment Partners LLC
  6. Allspring Global Investments Holdings LLC
  7. JPMorgan Chase & Co.
  8. Atlantic Union Bankshares Corp