Latest 10-Q

What changed in White Mountains Insurance Group, Ltd.'s latest quarterly report, compared with the one before.

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Insider trades

Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.

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13F holders

Funds that report this stock, checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.

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Trades by members of Congress

Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.

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Executive-branch trades

1 trade

Trades in White Mountains Insurance Group, Ltd. reported by the President, Cabinet members and other senior executive-branch officials. Amounts are ranges.Form 278-T is the periodic transaction report that senior executive-branch officials file with the Office of Government Ethics. They must report each trade over $1,000 within 30 days of being notified of it, and no later than 45 days after the trade. Amounts are ranges, not exact figures.

Recent executive-branch trades
OfficialAssetThe form has no ticker column. The asset is shown as the filer wrote it. We add a ticker link only when we could match the asset to a listed company.TypeTradedAmountThe form asks for a range, such as $1,001 - $15,000, not an exact amount. A line can be left blank when the filer's note says the amount was not more than $1,000.FiledReport
Arjun Mody
Deputy Commissioner, Social Security Administration
White Mountains Insurance Group Ltd. (WTM)SaleJan 30, 2026$1,001 - $15,000Feb 27, 2026OGE Form 278-T ↗
All 1 trade in WTMFree to read. Amounts are ranges.

Lobbying

What White Mountains Insurance Group, Ltd. and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.

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Lobbying and contracts

What White Mountains Insurance Group, Ltd. reported spending on lobbying next to the federal contracts it was awarded, by year.Lobbying: each report counts once. If a report was amended, only the newest version counts. Totals use the company's own report when it files one (it includes payments to hired firms); otherwise the hired firms' reported income. Registrations and reports with no amount are not counted. A firm that hands part of its work to another firm may report the same money as that other firm does; the filings do not allow us to tell. Contracts: each award is counted once, for the company that received it (or its listed parent when only the parent is matched), in the year of its first obligation. The amount is the total obligated to date, so a later increase is counted in the year the award began. Only awards of $1 million or more are collected. Agencies: the offices named on lobbying reports and the awarding agencies of contracts are matched to one department name (the Army, Navy and Air Force count as the Department of Defense; NIH, FDA and CMS as Health and Human Services). An agency is listed under both when the company lobbied it and was awarded a contract by it in the same period. Offices outside this list, and Congress, are not counted as agencies.

$0$10.0K$20.0K$30.0K2024 · Lobbying: $30,0002024 · Federal contracts: $020242025 · Lobbying: $30,0002025 · Federal contracts: $02025

Lobbying Federal contractsBoth bars use one dollar scale.

Lobbying and federal contracts of White Mountains Insurance Group, Ltd. by year
Gifts by the company's PAC to candidates for Congress. They come from donations to the PAC, not from the company's own funds.
2025$30.0K1Taxation——————
2024$30.0K1Taxation——————

Agencies both lobbied and awarding contracts

No agency appears on both sides in the last 12 months.

Lobbying and contract awards are reported separately; showing them together does not mean one caused the other.

All companies · Contract awards · Lobbying reports

Capitol Hires at White Mountains Insurance Group, Ltd.

2 hires

Lobbyists for White Mountains Insurance Group, Ltd. who say they once worked in Congress or the executive branch.

Capitol Hires at White Mountains Insurance Group, Ltd.
The covered position the lobbyist says they held: an office of a member of Congress, a committee or an executive-branch body, as written in the filing. The member's name is a link only when exactly one member of Congress fits the name, chamber, first name and years given; otherwise it stays as written.The lobbying report (LDA form LD-2) that names this lobbyist and office, with a link to it. Report period is the quarter the report covers; Posted is the day it was filed or amended, which can be much later. The same lobbyist is named again on each quarterly report for the same client, so a row is shown once, from the newest report, with the number of filings that name them.
Kenneth KiesJoint Committee on Taxation
Committee
Chief of StaffFederal Policy Group, LLC
Report period 2025 Q1 ↗
Posted Mar 28, 2025 · in 2 filings
Aharon FriedmanCommittee on Ways and Means
Committee
Tax CounselFederal Policy Group, LLC
Report period 2025 Q1 ↗
Posted Mar 28, 2025 · in 2 filings

Each row reflects what was disclosed at the time of filing. A lobbyist listed may no longer be registered.

Institutional ownership over time

How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.

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More filings and data

Each opens the table.

About the company

The basics from the company’s SEC registration.

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$2,254.95+$8.43 (+0.38%) Nov 13 close
Oct 13, 2026: $2,093.13Oct 14, 2026: $2,098.01Oct 15, 2026: $2,143.73Oct 16, 2026: $2,160.31Oct 19, 2026: $2,167.12Oct 20, 2026: $2,213.61Oct 21, 2026: $2,209.95Oct 22, 2026: $2,247.52Oct 23, 2026: $2,225.24Oct 26, 2026: $2,227.34Oct 27, 2026: $2,212.20Oct 28, 2026: $2,208.58Oct 29, 2026: $2,245.46Oct 30, 2026: $2,269.99Nov 2, 2026: $2,317.42Nov 3, 2026: $2,286.53Nov 4, 2026: $2,376.30Nov 5, 2026: $2,294.16Nov 6, 2026: $2,241.12Nov 9, 2026: $2,256.20Nov 10, 2026: $2,280.00Nov 11, 2026: $2,259.75Nov 12, 2026: $2,246.52Nov 13, 2026: $2,254.95
Oct 13, 2026Low $2,093.13 · High $2,376.30Nov 13, 2026
Aug 13, 2026: $2,141.42Aug 14, 2026: $2,137.12Aug 17, 2026: $2,113.40Aug 18, 2026: $2,145.46Aug 19, 2026: $2,129.20Aug 20, 2026: $2,117.70Aug 21, 2026: $2,110.95Aug 24, 2026: $2,132.30Aug 25, 2026: $2,141.20Aug 26, 2026: $2,132.74Aug 27, 2026: $2,127.57Aug 28, 2026: $2,135.41Aug 31, 2026: $2,102.01Sep 1, 2026: $2,098.96Sep 2, 2026: $2,104.75Sep 3, 2026: $2,112.23Sep 4, 2026: $2,103.49Sep 8, 2026: $2,052.48Sep 9, 2026: $2,050.81Sep 10, 2026: $2,075.99Sep 11, 2026: $2,053.15Sep 14, 2026: $2,057.00Sep 15, 2026: $2,045.94Sep 16, 2026: $2,062.37Sep 17, 2026: $2,058.32Sep 18, 2026: $2,061.30Sep 21, 2026: $2,056.85Sep 22, 2026: $2,053.64Sep 23, 2026: $2,032.01Sep 24, 2026: $2,029.33Sep 25, 2026: $2,028.62Sep 28, 2026: $2,014.97Sep 29, 2026: $2,021.51Sep 30, 2026: $2,006.49Oct 1, 2026: $2,013.04Oct 2, 2026: $2,020.92Oct 5, 2026: $2,019.44Oct 6, 2026: $2,037.25Oct 7, 2026: $2,031.50Oct 8, 2026: $2,059.77Oct 9, 2026: $2,060.63Oct 12, 2026: $2,086.76Oct 13, 2026: $2,093.13Oct 14, 2026: $2,098.01Oct 15, 2026: $2,143.73Oct 16, 2026: $2,160.31Oct 19, 2026: $2,167.12Oct 20, 2026: $2,213.61Oct 21, 2026: $2,209.95Oct 22, 2026: $2,247.52Oct 23, 2026: $2,225.24Oct 26, 2026: $2,227.34Oct 27, 2026: $2,212.20Oct 28, 2026: $2,208.58Oct 29, 2026: $2,245.46Oct 30, 2026: $2,269.99Nov 2, 2026: $2,317.42Nov 3, 2026: $2,286.53Nov 4, 2026: $2,376.30Nov 5, 2026: $2,294.16Nov 6, 2026: $2,241.12Nov 9, 2026: $2,256.20Nov 10, 2026: $2,280.00Nov 11, 2026: $2,259.75Nov 12, 2026: $2,246.52Nov 13, 2026: $2,254.95
Aug 13, 2026Low $2,006.49 · High $2,376.30Nov 13, 2026
Nov 13, 2025: $1,915.09Nov 14, 2025: $1,924.67Nov 17, 2025: $1,900.00Nov 18, 2025: $1,900.34Nov 19, 2025: $1,889.30Nov 20, 2025: $1,881.61Nov 21, 2025: $2,000.00Nov 24, 2025: $1,996.99Nov 25, 2025: $2,003.65Nov 26, 2025: $2,029.06Nov 28, 2025: $2,024.25Dec 1, 2025: $2,024.89Dec 2, 2025: $2,027.41Dec 3, 2025: $2,025.55Dec 4, 2025: $2,037.79Dec 5, 2025: $2,034.79Dec 8, 2025: $2,013.52Dec 9, 2025: $2,018.75Dec 10, 2025: $2,040.94Dec 11, 2025: $2,044.87Dec 12, 2025: $2,054.51Dec 15, 2025: $2,068.17Dec 16, 2025: $2,045.31Dec 17, 2025: $2,046.65Dec 18, 2025: $2,040.00Dec 19, 2025: $2,042.02Dec 22, 2025: $2,083.14Dec 23, 2025: $2,090.90Dec 24, 2025: $2,088.05Dec 26, 2025: $2,062.34Dec 29, 2025: $2,075.53Dec 30, 2025: $2,078.62Dec 31, 2025: $2,078.03Jan 2, 2026: $2,041.90Jan 5, 2026: $2,062.86Jan 6, 2026: $2,047.31Jan 7, 2026: $2,059.54Jan 8, 2026: $2,074.49Jan 9, 2026: $2,048.45Jan 12, 2026: $2,060.84Jan 13, 2026: $2,057.99Jan 14, 2026: $2,076.96Jan 15, 2026: $2,061.92Jan 16, 2026: $2,056.36Jan 20, 2026: $2,045.45Jan 21, 2026: $2,073.85Jan 22, 2026: $2,071.97Jan 23, 2026: $2,056.64Jan 26, 2026: $2,076.93Jan 27, 2026: $2,052.44Jan 28, 2026: $2,039.19Jan 29, 2026: $2,052.17Jan 30, 2026: $2,044.93Feb 2, 2026: $2,056.36Feb 3, 2026: $2,056.30Feb 4, 2026: $2,086.14Feb 5, 2026: $2,126.57Feb 6, 2026: $2,185.00Feb 9, 2026: $2,098.78Feb 10, 2026: $2,114.10Feb 11, 2026: $2,143.84Feb 12, 2026: $2,182.01Feb 13, 2026: $2,188.07Feb 17, 2026: $2,230.83Feb 18, 2026: $2,202.12Feb 19, 2026: $2,201.23Feb 20, 2026: $2,228.13Feb 23, 2026: $2,189.34Feb 24, 2026: $2,223.42Feb 25, 2026: $2,220.28Feb 26, 2026: $2,222.97Feb 27, 2026: $2,220.51Mar 2, 2026: $2,244.14Mar 3, 2026: $2,215.09Mar 4, 2026: $2,223.79Mar 5, 2026: $2,188.94Mar 6, 2026: $2,165.60Mar 9, 2026: $2,148.65Mar 10, 2026: $2,223.46Mar 11, 2026: $2,212.14Mar 12, 2026: $2,182.05Mar 13, 2026: $2,194.70Mar 16, 2026: $2,199.69Mar 17, 2026: $2,206.81Mar 18, 2026: $2,185.01Mar 19, 2026: $2,181.16Mar 20, 2026: $2,155.01Mar 23, 2026: $2,162.99Mar 24, 2026: $2,211.91Mar 25, 2026: $2,205.51Mar 26, 2026: $2,220.71Mar 27, 2026: $2,153.86Mar 30, 2026: $2,193.86Mar 31, 2026: $2,196.96Apr 1, 2026: $2,178.44Apr 2, 2026: $2,169.76Apr 6, 2026: $2,203.96Apr 7, 2026: $2,215.73Apr 8, 2026: $2,277.21Apr 9, 2026: $2,309.92Apr 10, 2026: $2,301.14Apr 13, 2026: $2,297.99Apr 14, 2026: $2,300.00Apr 15, 2026: $2,291.46Apr 16, 2026: $2,294.72Apr 17, 2026: $2,319.41Apr 20, 2026: $2,275.01Apr 21, 2026: $2,276.34Apr 22, 2026: $2,269.19Apr 23, 2026: $2,285.39Apr 24, 2026: $2,259.27Apr 27, 2026: $2,267.56Apr 28, 2026: $2,263.69Apr 29, 2026: $2,206.00Apr 30, 2026: $2,231.99May 1, 2026: $2,163.50May 4, 2026: $2,167.41May 5, 2026: $2,151.67May 6, 2026: $2,080.00May 7, 2026: $2,092.50May 8, 2026: $2,128.40May 11, 2026: $2,133.58May 12, 2026: $2,109.20May 13, 2026: $2,119.91May 14, 2026: $2,112.72May 15, 2026: $2,136.76May 18, 2026: $2,138.35May 19, 2026: $2,144.19May 20, 2026: $2,144.81May 21, 2026: $2,139.09May 22, 2026: $2,146.85May 26, 2026: $2,129.17May 27, 2026: $2,101.94May 28, 2026: $2,084.31May 29, 2026: $2,064.82Jun 1, 2026: $2,062.03Jun 2, 2026: $2,050.81Jun 3, 2026: $2,034.02Jun 4, 2026: $2,015.54Jun 5, 2026: $2,065.14Jun 8, 2026: $2,023.70Jun 9, 2026: $2,004.76Jun 10, 2026: $2,018.89Jun 11, 2026: $1,989.54Jun 12, 2026: $2,024.05Jun 15, 2026: $2,030.64Jun 16, 2026: $2,032.37Jun 17, 2026: $2,003.49Jun 18, 2026: $2,013.36Jun 22, 2026: $2,010.75Jun 23, 2026: $2,023.63Jun 24, 2026: $2,022.41Jun 25, 2026: $2,019.70Jun 26, 2026: $2,096.56Jun 29, 2026: $2,090.94Jun 30, 2026: $2,073.39Jul 1, 2026: $2,064.04Jul 2, 2026: $2,173.81Jul 6, 2026: $2,166.27Jul 7, 2026: $2,165.85Jul 8, 2026: $2,167.25Jul 9, 2026: $2,185.23Jul 10, 2026: $2,181.19Jul 13, 2026: $2,174.96Jul 14, 2026: $2,167.79Jul 15, 2026: $2,139.73Jul 16, 2026: $2,196.48Jul 17, 2026: $2,211.52Jul 20, 2026: $2,211.22Jul 21, 2026: $2,193.26Jul 22, 2026: $2,182.32Jul 23, 2026: $2,176.85Jul 24, 2026: $2,208.05Jul 27, 2026: $2,193.94Jul 28, 2026: $2,202.61Jul 29, 2026: $2,150.34Jul 30, 2026: $2,118.61Jul 31, 2026: $2,097.73Aug 3, 2026: $2,101.47Aug 4, 2026: $2,117.86Aug 5, 2026: $2,111.91Aug 6, 2026: $2,141.09Aug 7, 2026: $2,149.44Aug 10, 2026: $2,109.68Aug 11, 2026: $2,112.01Aug 12, 2026: $2,119.46Aug 13, 2026: $2,141.42Aug 14, 2026: $2,137.12Aug 17, 2026: $2,113.40Aug 18, 2026: $2,145.46Aug 19, 2026: $2,129.20Aug 20, 2026: $2,117.70Aug 21, 2026: $2,110.95Aug 24, 2026: $2,132.30Aug 25, 2026: $2,141.20Aug 26, 2026: $2,132.74Aug 27, 2026: $2,127.57Aug 28, 2026: $2,135.41Aug 31, 2026: $2,102.01Sep 1, 2026: $2,098.96Sep 2, 2026: $2,104.75Sep 3, 2026: $2,112.23Sep 4, 2026: $2,103.49Sep 8, 2026: $2,052.48Sep 9, 2026: $2,050.81Sep 10, 2026: $2,075.99Sep 11, 2026: $2,053.15Sep 14, 2026: $2,057.00Sep 15, 2026: $2,045.94Sep 16, 2026: $2,062.37Sep 17, 2026: $2,058.32Sep 18, 2026: $2,061.30Sep 21, 2026: $2,056.85Sep 22, 2026: $2,053.64Sep 23, 2026: $2,032.01Sep 24, 2026: $2,029.33Sep 25, 2026: $2,028.62Sep 28, 2026: $2,014.97Sep 29, 2026: $2,021.51Sep 30, 2026: $2,006.49Oct 1, 2026: $2,013.04Oct 2, 2026: $2,020.92Oct 5, 2026: $2,019.44Oct 6, 2026: $2,037.25Oct 7, 2026: $2,031.50Oct 8, 2026: $2,059.77Oct 9, 2026: $2,060.63Oct 12, 2026: $2,086.76Oct 13, 2026: $2,093.13Oct 14, 2026: $2,098.01Oct 15, 2026: $2,143.73Oct 16, 2026: $2,160.31Oct 19, 2026: $2,167.12Oct 20, 2026: $2,213.61Oct 21, 2026: $2,209.95Oct 22, 2026: $2,247.52Oct 23, 2026: $2,225.24Oct 26, 2026: $2,227.34Oct 27, 2026: $2,212.20Oct 28, 2026: $2,208.58Oct 29, 2026: $2,245.46Oct 30, 2026: $2,269.99Nov 2, 2026: $2,317.42Nov 3, 2026: $2,286.53Nov 4, 2026: $2,376.30Nov 5, 2026: $2,294.16Nov 6, 2026: $2,241.12Nov 9, 2026: $2,256.20Nov 10, 2026: $2,280.00Nov 11, 2026: $2,259.75Nov 12, 2026: $2,246.52Nov 13, 2026: $2,254.95
Nov 13, 2025Low $1,881.61 · High $2,376.30Nov 13, 2026
Congress purchase Congress sale Insider sale over $1M

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