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WTM Insider Trading

Insider Ownership Percentage: 3.00%
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: $1,929.78
Price Change: ▲ Price Increase of +4.768 (0.25%)
As of 11/12/2025 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.

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White Mountains Insurance Group Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
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
10/29/2025Wealth Enhancement Advisory Services LLC210$0.35M0.0%-9.1%0.008%Search for SEC Filing on Google Icon
10/29/2025Sequoia Financial Advisors LLC818$1.37M0.0%-1.4%0.032%Search for SEC Filing on Google Icon
10/28/2025QRG Capital Management Inc.369$0.62M0.0%-3.4%0.014%Search for SEC Filing on Google Icon
10/28/2025Evergreen Capital Management LLC146$0.24M0.0%+27.0%0.006%Search for SEC Filing on Google Icon
10/28/2025Reinhart Partners LLC.41,609$69.58M2.3%-0.2%1.616%Search for SEC Filing on Google Icon
10/28/2025Ritholtz Wealth Management208$0.35M0.0%-2.8%0.008%Search for SEC Filing on Google Icon
10/28/2025Wilmington Savings Fund Society FSB209$0.35M0.0%+49.3%0.008%Search for SEC Filing on Google Icon
10/27/2025Versant Capital Management Inc16$27K0.0%-51.5%0.001%Search for SEC Filing on Google Icon
10/27/2025TD Private Client Wealth LLC18$30K0.0%-43.8%0.001%Search for SEC Filing on Google Icon
10/27/2025Quent Capital LLC60$100K0.0%N/A0.002%Search for SEC Filing on Google Icon
10/24/2025MGO One Seven LLC187$0.31M0.0%+6.9%0.007%Search for SEC Filing on Google Icon
10/24/2025State of Alaska Department of Revenue117$0.20M0.0%N/A0.005%Search for SEC Filing on Google Icon
10/23/2025SG Americas Securities LLC191$0.32M0.0%N/A0.007%Search for SEC Filing on Google Icon
10/23/2025HB Wealth Management LLC126$0.21M0.0%N/A0.005%Search for SEC Filing on Google Icon
10/23/2025Park Avenue Securities LLC702$1.17M0.0%+10.2%0.027%Search for SEC Filing on Google Icon
10/23/2025KLP Kapitalforvaltning AS605$1.01M0.0%+19.8%0.023%Search for SEC Filing on Google Icon
10/22/2025Robeco Institutional Asset Management B.V.17,239$28.82M0.0%-3.3%0.669%Search for SEC Filing on Google Icon
10/21/2025Global Retirement Partners LLC343$0.57M0.0%+4.6%0.013%Search for SEC Filing on Google Icon
10/21/2025Regency Capital Management Inc. DE811$1.36M0.6%N/A0.031%Search for SEC Filing on Google Icon
10/20/2025Allspring Global Investments Holdings LLC31,698$52.32M0.1%+7.1%1.229%Search for SEC Filing on Google Icon
10/17/2025Ethic Inc.743$1.24M0.0%-4.7%0.029%Search for SEC Filing on Google Icon
10/16/2025Hengehold Capital Management LLC394$0.66M0.1%-20.1%0.015%Search for SEC Filing on Google Icon
10/16/2025Blue Trust Inc.113$0.19M0.0%+46.8%0.004%Search for SEC Filing on Google Icon
10/15/2025CWM LLC15$25K0.0%-51.6%0.001%Search for SEC Filing on Google Icon
10/15/2025Harbor Capital Advisors Inc.852$1.42M0.1%-71.4%0.033%Search for SEC Filing on Google Icon
10/14/2025Farther Finance Advisors LLC476$0.80M0.0%+1.7%0.018%Search for SEC Filing on Google Icon
10/10/2025Kathleen S. Wright Associates Inc.340$0.57M0.2%-10.5%0.013%Search for SEC Filing on Google Icon
10/10/2025Perpetual Ltd8,127$13.58M0.2%+5.2%0.316%Search for SEC Filing on Google Icon
10/9/2025Voya Investment Management LLC208$0.35M0.0%-25.4%0.008%Search for SEC Filing on Google Icon
10/8/2025Sendero Wealth Management LLC562$0.94M0.1%+34.1%0.022%Search for SEC Filing on Google Icon
10/7/2025Oak Thistle LLC657$1.10M0.2%N/A0.026%Search for SEC Filing on Google Icon
9/26/2025Corient Private Wealth LLC849$1.53M0.0%+24.9%0.033%Search for SEC Filing on Google Icon
9/4/2025Osaic Holdings Inc.390$0.70M0.0%+5.1%0.015%Search for SEC Filing on Google Icon
8/27/2025Squarepoint Ops LLC279$0.50M0.0%+42.3%0.011%Search for SEC Filing on Google Icon
8/19/2025State of Wyoming76$0.14M0.0%N/A0.003%Search for SEC Filing on Google Icon
8/16/2025Evergreen Capital Management LLC115$0.21M0.0%-12.9%0.004%Search for SEC Filing on Google Icon
8/15/2025Tower Research Capital LLC TRC 190$0.34M0.0%+216.7%0.007%Search for SEC Filing on Google Icon
8/15/2025Corient Private Wealth LLC1,698$3.05M0.0%+149.7%0.066%Search for SEC Filing on Google Icon
8/15/2025Captrust Financial Advisors759$1.36M0.0%-14.6%0.029%Search for SEC Filing on Google Icon
8/15/2025Vident Advisory LLC120$0.22M0.0%N/A0.005%Search for SEC Filing on Google Icon
8/15/2025Two Sigma Securities LLC170$0.31M0.0%-20.2%0.007%Search for SEC Filing on Google Icon
8/15/2025Select Equity Group L.P.17,872$32.09M0.1%-36.2%0.693%Search for SEC Filing on Google Icon
8/15/2025MML Investors Services LLC2,734$4.91M0.0%+6.2%0.106%Search for SEC Filing on Google Icon
8/15/2025London Co. of Virginia68,770$123.51M0.7%-0.6%2.666%Search for SEC Filing on Google Icon
8/15/2025HRT Financial LP5,087$9.13M0.0%N/A0.197%Search for SEC Filing on Google Icon
8/15/2025BNP Paribas Financial Markets188$0.34M0.0%+27.9%0.007%Search for SEC Filing on Google Icon
8/15/2025Bank of America Corp DE39,409$70.77M0.0%-4.0%1.527%Search for SEC Filing on Google Icon
8/15/2025Ameriprise Financial Inc.3,482$6.25M0.0%-1.4%0.135%Search for SEC Filing on Google Icon
8/15/2025AQR Capital Management LLC8,084$14.44M0.0%-4.8%0.313%Search for SEC Filing on Google Icon
8/14/2025Jane Street Group LLC6,071$10.90M0.0%+950.3%0.235%Search for SEC Filing on Google Icon
8/14/2025Raymond James Financial Inc.30,677$55.09M0.0%-3.3%1.189%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
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: $1,929.78
Low: $1,915.46
High: $1,949.89

50 Day Range

MA: $1,834.51
Low: $1,648.88
High: $1,937.96

52 Week Range

Now: $1,929.78
Low: $1,648.00
High: $2,023.00

Volume

16,488 shs

Average Volume

22,337 shs

Market Capitalization

$4.93 billion

P/E Ratio

24.17

Dividend Yield

0.05%

Beta

0.37

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)
  2. Weston M Hicks (Director)
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. Reinhart Partners LLC. — 1.62%
  5. Allspring Global Investments Holdings LLC — 1.23%
  6. Mraz Amerine & Associates Inc. — 0.88%
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. Barclays PLC
  3. Vanguard Group Inc.
  4. Harbor Capital Advisors Inc.
  5. Strs Ohio
  6. Robeco Institutional Asset Management B.V.
  7. TD Asset Management Inc
  8. Teachers Retirement System of The State of Kentucky

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. Allspring Global Investments Holdings LLC
  3. JPMorgan Chase & Co.
  4. Atlantic Union Bankshares Corp
  5. Dimensional Fund Advisors LP
  6. Mraz Amerine & Associates Inc.
  7. Regency Capital Management Inc. DE
  8. Texas Yale Capital Corp.