InsiderTrades.com logo

WTM Insider Trading

Insider Ownership Percentage: 3.00%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $338,004.15

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.

Skip ChartChart Data in Insider Trading History Table

White Mountains Insurance Group Share Price & Price History

Current Price: $2,146.56
Price Change: ▼ Price Decrease of -0.294 (-0.01%)
As of 05/22/2026 03:59 PM ET

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

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

White Mountains Insurance Group Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
12/16/2025Philip A GelstonDirectorSell165$2,048.51$338,004.151,568View SEC Filing Icon  
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  
See Full Table

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
5/19/2026Bank of America Corp DE28,358$62.30M0.0%-1.6%1.143%Search for SEC Filing on Google Icon
5/19/2026Edgestream Partners L.P.3,130$6.88M0.2%+491.7%0.126%Search for SEC Filing on Google Icon
5/18/2026Amundi615$1.35M0.0%N/A0.025%Search for SEC Filing on Google Icon
5/18/2026California State Teachers Retirement System2,887$6.34M0.0%+17.5%0.116%Search for SEC Filing on Google Icon
5/18/2026Royal Bank of Canada1,195$2.63M0.0%+8.9%0.048%Search for SEC Filing on Google Icon
5/18/2026Empowered Funds LLC1,284$2.82M0.0%+1,342.7%0.052%Search for SEC Filing on Google Icon
5/16/2026The Manufacturers Life Insurance Company 614$1.35M0.0%+10.6%0.025%Search for SEC Filing on Google Icon
5/16/2026Quantinno Capital Management LP9,784$21.50M0.0%+34.6%0.395%Search for SEC Filing on Google Icon
5/15/2026Weiss Asset Management LP120$0.26M0.0%N/A0.005%Search for SEC Filing on Google Icon
5/15/2026Bradley Foster & Sargent Inc. CT2,002$4.40M0.1%-63.3%0.081%Search for SEC Filing on Google Icon
5/15/2026London Co. of Virginia57,131$125.54M0.8%-2.7%2.304%Search for SEC Filing on Google Icon
5/15/2026Entropy Technologies LP470$1.03M0.0%-4.1%0.019%Search for SEC Filing on Google Icon
5/15/2026Cannell & Spears LLC28,027$61.57M1.2%-0.3%1.130%Search for SEC Filing on Google Icon
5/14/2026Renaissance Technologies LLC2,611$5.74M0.0%+74.0%0.105%Search for SEC Filing on Google Icon
5/14/2026Public Employees Retirement System of Ohio751$1.65M0.0%-3.2%0.030%Search for SEC Filing on Google Icon
5/14/2026Arrowstreet Capital Limited Partnership1,913$4.20M0.0%+135.9%0.077%Search for SEC Filing on Google Icon
5/14/2026Capula Management Ltd921$2.02M0.0%N/A0.037%Search for SEC Filing on Google Icon
5/14/2026Bank of Nova Scotia178$0.39M0.0%-5.8%0.007%Search for SEC Filing on Google Icon
5/14/2026Sei Investments Co.11,098$24.38M0.0%+40.2%0.448%Search for SEC Filing on Google Icon
5/14/2026State of Wyoming179$0.39M0.0%+33.6%0.007%Search for SEC Filing on Google Icon
5/13/2026Cetera Investment Advisers346$0.76M0.0%-4.9%0.014%Search for SEC Filing on Google Icon
5/13/2026NewEdge Wealth LLC105$0.23M0.0%-13.9%0.004%Search for SEC Filing on Google Icon
5/13/2026First Trust Advisors LP3,058$6.72M0.0%-32.9%0.123%Search for SEC Filing on Google Icon
5/8/2026Triad Investment Management2,513$5.52M6.1%-1.4%0.101%Search for SEC Filing on Google Icon
5/8/2026PNC Financial Services Group Inc.546$1.20M0.0%+1.9%0.022%Search for SEC Filing on Google Icon
5/7/2026WCM Investment Management LLC5,995$13.15M0.0%-43.9%0.242%Search for SEC Filing on Google Icon
5/7/2026Dimensional Fund Advisors LP156,618$344.08M0.1%+0.0%6.315%Search for SEC Filing on Google Icon
5/7/2026Swiss National Bank5,036$11.06M0.0%-1.0%0.203%Search for SEC Filing on Google Icon
5/6/2026California Public Employees Retirement System6,414$14.09M0.0%-4.5%0.259%Search for SEC Filing on Google Icon
5/6/2026Kera Capital Partners Inc.125$0.28M0.0%+9.6%0.005%Search for SEC Filing on Google Icon
5/6/2026Bessemer Group Inc.19$42K0.0%-26.9%0.001%Search for SEC Filing on Google Icon
5/6/2026Allspring Global Investments Holdings LLC18,612$40.55M0.1%-7.8%0.750%Search for SEC Filing on Google Icon
5/5/2026Regency Capital Management Inc. DE1,535$3.37M1.5%-6.1%0.062%Search for SEC Filing on Google Icon
5/5/2026Midwest Professional Planners LTD.395$0.87M0.2%+1.8%0.016%Search for SEC Filing on Google Icon
5/5/2026Bank of New York Mellon Corp8,444$18.55M0.0%-4.4%0.341%Search for SEC Filing on Google Icon
5/5/2026Sanctuary Advisors LLC418$0.92M0.0%-12.0%0.017%Search for SEC Filing on Google Icon
5/4/2026AMG National Trust Bank571$1.25M0.0%-4.0%0.023%Search for SEC Filing on Google Icon
5/4/2026Chicago Partners Investment Group LLC467$1.06M0.0%-10.7%0.019%Search for SEC Filing on Google Icon
5/2/2026Global Assets Advisory LLC15$33K0.0%N/A0.001%Search for SEC Filing on Google Icon
5/1/2026Sequoia Financial Advisors LLC824$1.81M0.0%-9.1%0.033%Search for SEC Filing on Google Icon
4/30/2026Equitable Trust Co.830$1.82M0.1%-1.2%0.033%Search for SEC Filing on Google Icon
4/30/2026Hsbc Holdings PLC94$0.21M0.0%N/A0.004%Search for SEC Filing on Google Icon
4/30/2026Kestra Advisory Services LLC122$0.27M0.0%-28.7%0.005%Search for SEC Filing on Google Icon
4/30/2026Quantum Portfolio Management LLC96$0.21M0.0%N/A0.004%Search for SEC Filing on Google Icon
4/28/2026Lee Danner & Bass Inc.3,203$7.04M0.4%+3.2%0.129%Search for SEC Filing on Google Icon
4/27/2026HB Wealth Management LLC151$0.33M0.0%+16.2%0.006%Search for SEC Filing on Google Icon
4/27/2026Elevation Point Wealth Partners LLC297$0.65M0.0%+33.2%0.012%Search for SEC Filing on Google Icon
4/25/2026Eagle Bay Advisors LLC104$0.23M0.2%+14.3%0.004%Search for SEC Filing on Google Icon
4/25/2026Keybank National Association OH161$0.35M0.0%-8.5%0.006%Search for SEC Filing on Google Icon
4/22/2026Janney Montgomery Scott LLC510$1.12M0.0%+5.8%0.021%Search for SEC Filing on Google Icon
4/22/2026Pictet Asset Management Holding SA430$0.95M0.0%+7.5%0.017%Search for SEC Filing on Google Icon
4/22/2026Sterling Capital Management LLC83$0.18M0.0%-43.2%0.003%Search for SEC Filing on Google Icon
4/22/2026Venturi Wealth Management LLC243$0.53M0.0%+10.0%0.010%Search for SEC Filing on Google Icon
4/20/2026Blue Trust Inc.77$0.17M0.0%-13.5%0.003%Search for SEC Filing on Google Icon
4/16/2026SG Americas Securities LLC201$0.44M0.0%+204.5%0.008%Search for SEC Filing on Google Icon
4/16/2026Lexington Hill Partners LLC520$1.14M0.6%N/A0.021%Search for SEC Filing on Google Icon
3/17/2026Rockefeller Capital Management L.P.300$0.62M0.0%+36.4%0.012%Search for SEC Filing on Google Icon
3/9/2026Corient Private Wealth LLC906$1.88M0.0%+51.5%0.037%Search for SEC Filing on Google Icon
3/3/2026Caitong International Asset Management Co. Ltd61$0.13M0.0%+335.7%0.002%Search for SEC Filing on Google Icon
2/24/2026River Road Asset Management LLC120,880$251.19M2.8%+10.3%4.752%Search for SEC Filing on Google Icon
2/23/2026Kera Capital Partners Inc.114$0.23M0.0%N/A0.004%Search for SEC Filing on Google Icon
2/19/2026T. Rowe Price Investment Management Inc.44,560$92.60M0.1%-6.7%1.754%Search for SEC Filing on Google Icon
2/19/2026Invesco Ltd.2,995$6.22M0.0%-9.7%0.118%Search for SEC Filing on Google Icon
2/19/2026Corient Private Wealth LLC906$1.88M0.0%+51.5%0.036%Search for SEC Filing on Google Icon
2/18/2026Mercer Global Advisors Inc. ADV715$1.49M0.0%+386.4%0.028%Search for SEC Filing on Google Icon
2/18/2026Fuller & Thaler Asset Management Inc.108,172$224.79M0.8%+0.1%4.252%Search for SEC Filing on Google Icon
2/18/2026NewEdge Advisors LLC196$0.41M0.0%+15.3%0.008%Search for SEC Filing on Google Icon
2/18/2026Empowered Funds LLC89$0.19M0.0%N/A0.003%Search for SEC Filing on Google Icon
2/18/2026XTX Topco Ltd229$0.48M0.0%N/A0.009%Search for SEC Filing on Google Icon
2/18/2026Quadrature Capital Ltd360$0.75M0.0%N/A0.014%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC856$1.78M0.0%-8.4%0.034%Search for SEC Filing on Google Icon
2/18/2026Main Street Financial Solutions LLC835$1.74M0.1%-33.8%0.033%Search for SEC Filing on Google Icon
2/18/2026Gotham Asset Management LLC6,716$13.96M0.1%-2.7%0.264%Search for SEC Filing on Google Icon
2/18/2026First Manhattan CO. LLC.100$0.21M0.0%N/A0.004%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC4,476$9.30M0.0%-24.3%0.176%Search for SEC Filing on Google Icon
2/17/2026Jain Global LLC559$1.16M0.0%+87.0%0.022%Search for SEC Filing on Google Icon
2/17/2026CHICAGO TRUST Co NA100$0.21M0.0%N/A0.004%Search for SEC Filing on Google Icon
2/17/2026Jump Financial LLC658$1.37M0.0%N/A0.026%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD1,990$4.14M0.0%+5.7%0.078%Search for SEC Filing on Google Icon
2/17/2026T. Rowe Price Investment Management Inc.6,662$13.84M0.0%-86.1%0.262%Search for SEC Filing on Google Icon
2/17/2026Elkhorn Partners Limited Partnership13,598$28.26M17.8%-8.2%0.535%Search for SEC Filing on Google Icon
2/17/2026Public Employees Retirement System of Ohio776$1.61M0.0%-4.7%0.031%Search for SEC Filing on Google Icon
2/17/2026California State Teachers Retirement System2,457$5.11M0.0%+1.0%0.097%Search for SEC Filing on Google Icon
2/17/2026Russell Investments Group Ltd.397$0.83M0.0%+13.1%0.016%Search for SEC Filing on Google Icon
2/17/2026London Co. of Virginia58,697$122M0.7%-12.1%2.311%Search for SEC Filing on Google Icon
2/17/2026State of Wisconsin Investment Board138$0.29M0.0%-44.6%0.005%Search for SEC Filing on Google Icon
2/17/2026&PARTNERS638$1.33M0.0%+2.4%0.025%Search for SEC Filing on Google Icon
2/17/2026Royal Bank of Canada1,097$2.28M0.0%-38.0%0.043%Search for SEC Filing on Google Icon
2/16/2026Squarepoint Ops LLC706$1.47M0.0%+296.6%0.028%Search for SEC Filing on Google Icon
2/16/2026Vanguard Personalized Indexing Management LLC253$0.53M0.0%+5.4%0.010%Search for SEC Filing on Google Icon
2/16/2026Prospector Partners LLC490$1.02M2.2%-87.0%0.019%Search for SEC Filing on Google Icon
2/16/2026Parker Investment Management LLC475$0.99M0.1%-5.0%0.019%Search for SEC Filing on Google Icon
2/16/2026MML Investors Services LLC2,935$6.10M0.0%+2.9%0.116%Search for SEC Filing on Google Icon
2/16/2026Mariner LLC402$0.84M0.0%+87.9%0.016%Search for SEC Filing on Google Icon
2/16/2026Nicolet Advisory Services LLC230$0.47M0.0%+8.0%0.009%Search for SEC Filing on Google Icon
2/16/2026Focus Partners Wealth1,610$3.10M0.0%+19.0%0.063%Search for SEC Filing on Google Icon
2/16/2026Entropy Technologies LP490$1.02M0.1%N/A0.019%Search for SEC Filing on Google Icon
2/16/2026Arax Advisory Partners281$0.59M0.0%-44.7%0.011%Search for SEC Filing on Google Icon
2/16/2026Barclays PLC559$1.16M0.0%-41.3%0.022%Search for SEC Filing on Google Icon
2/16/2026Brown Advisory Inc.18,956$39.39M0.1%-6.8%0.746%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: $2,146.56
Low: $2,136.84
High: $2,159.00

50 Day Range

MA: $2,201.30
Low: $2,077.51
High: $2,318.51

52 Week Range

Now: $2,146.56
Low: $1,648.00
High: $2,333.00

Volume

16,554 shs

Average Volume

21,052 shs

Market Capitalization

$5.32 billion

P/E Ratio

5.28

Dividend Yield

0.05%

Beta

0.32

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 (Director)
  2. Mountains Insurance Grou White (Major Shareholder)
  3. Raymond Joseph Rene Barrette (Chairman)
  4. Morgan W Davis (Director)
  5. Robert Lawrence Seelig (EVP)
  6. Yves Brouillette (Director)
  7. George Manning Rountree (Director)
  8. Kernan V Oberting (Director)
  9. Lowndes Andrew Smith (Director)
  10. 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. Dimensional Fund Advisors LP — 6.32%
  2. London Co. of Virginia — 2.30%
  3. Bank of America Corp DE — 1.14%
  4. Cannell & Spears LLC — 1.13%
  5. Allspring Global Investments Holdings LLC — 0.75%
  6. Sei Investments Co. — 0.45%
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. WCM Investment Management LLC
  2. Bradley Foster & Sargent Inc. CT
  3. Allspring Global Investments Holdings LLC
  4. London Co. of Virginia
  5. First Trust Advisors LP
  6. Bank of America Corp DE
  7. Bank of New York Mellon Corp
  8. California Public Employees Retirement System

Which major investors are buying White Mountains Insurance Group stock?

During the last quarter, WTM stock was purchased by institutional investors including:
  1. Sei Investments Co.
  2. Edgestream Partners L.P.
  3. Quantinno Capital Management LP
  4. Empowered Funds LLC
  5. Renaissance Technologies LLC
  6. Arrowstreet Capital Limited Partnership
  7. Capula Management Ltd
  8. Amundi

White Mountains Insurance Group Active Insiders

Michaela Hildreth
Michaela Hildreth (Age 57)
CAO
Morgan W Davis
Director
Peter M Carlson
Director
Weston M Hicks
Weston M Hicks
Director
Philip A Gelston
Philip A Gelston
Director
1 recent trades