WTM White Mountains Insurance (WTM) Insider Trading, Ownership & Congress Trades
Insurance · Fire, marine & casualty insurance · CIK 0000776867
SEC filings
Insider buyers, 180 days
0
House members buying, 1 year
0
STOCK Act, US House only, disclosed up to 45 days after the trade
Funds added, last quarter
0
13F, latest reported quarter
What the filings say about WTM
Congress, 1 year
No trades
Last one: purchase, 2025-06-23
White Mountains Insurance insider trades (Form 4)
Form 4 buys and sells (codes P and S). Grants, option exercises
and conversions excluded.
No insider purchases or sales are on record for WHITE MOUNTAINS INSURANCE GROUP LTD in the period covered. Source: SEC Form 4 filings, as of 2026-10-28.
Insider
Filed
Shares
Value
Since filing
Context
- First Form 4 purchase or sale (code P or S) here by this insider on our record.
- The trade is 47.9% of the 10,440 shares held after it.
- 2 other insiders sold within 30 days.
Insider activity: Director CAMPBELL REID TARLTON sold about $10.2M of WTM on Dec 19, 2025, the largest insider sale at the company on our record; 2 other insiders sold within 30 days.Context
- First Form 4 purchase or sale (code P or S) here by this insider on our record.
- The trade is 36.2% of the 13,809 shares held after it.
- 2 other insiders sold within 30 days.
Insider activity: Chief Executive Officer Rountree George Manning sold about $10.2M of WTM on Dec 19, 2025, the largest insider sale at the company on our record; 2 other insiders sold within 30 days.Context
- First Form 4 purchase or sale (code P or S) here by this insider on our record.
- The trade is 10.5% of the 1,568 shares held after it.
- 2 other insiders sold within 30 days.
Insider activity: Director Gelston Philip A sold about $338.0K of WTM on Dec 16, 2025, the largest insider sale at the company since 2022; 2 other insiders sold within 30 days.Context
- First Form 4 purchase or sale (code P or S) here by this insider on our record.
- The trade is 0.5% of the 2,068 shares held after it.
- No other insider bought within 30 days.
Insider activity: Director Hicks Weston M bought about $16.3K of WTM on Nov 17, 2023, the largest insider purchase at the company on our record.Context
- First Form 4 purchase or sale (code P or S) here by this insider on our record.
- The trade is 10.3% of the 2,306 shares held after it.
- No other insider bought within 30 days.
Insider activity: Director Hicks Weston M bought about $353.4K of WTM on Nov 17, 2023, the largest insider purchase at the company on our record.17 transactions on record
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
Seven facts, ranked against the sector ·
Rank is not a forecast
Insiders
no insider buys or sells on file
Congress
no House purchase disclosed in the last 12 months
Funds
under five funds report holding it
Revenue
+66.8% year over year
more than 94% of Insurance
Margin
29.6% net margin
more than 85% of Insurance
Buybacks
$216.8M repurchased, FY to 2026-06-30
more than 56% of Insurance
Short interest
6.5% of the float short (float per yahoo 2026-10-27) · 7.3 days to cover · settled 2026-10-15
more than 87% of Insurance
What changed in the last 30 days
Nothing new filed in the last 30 days
Watch WTM
A free account keeps a watchlist and can send one email a day when insiders, funds or Congress file on the names in it. No password and no card.
The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
+14.2%12M
Insider sell
Indexed to 100, dividend-adjusted, not a price chart.
When a name files heavily, the largest trades are drawn first.
Who owns WTM: institutional holders (13F)
13F holdings, latest reported quarter
SEC 13F
No reported 13F holders
No fund above the reporting threshold listed this stock last quarter. That is a fact, not missing data.
Congress trades in WTM
STOCK Act disclosures, US House only, filed up to 45 days after the trade
Bought 2025-06-23 · disclosed 31 days later
$50,001 - $100,000
Activist and 5% holders (13D/13G)
No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.
WTM planned insider sales (Form 144)
No planned-sale notices
No insider has filed to sell. Watch this after a run-up.
Executive pay vs shareholder return · Mr. Rountree
CEO pay, headline and as actually paid, against the company's
return and its chosen peers' (DEF 14A).
FY
CEO total
Actually paid
Other execs, avg
TSR
Peer TSR
2023
$7.6M
$11.7M
$3.7M
+35%
+68%
2022
$7.2M
$23.1M
$3.2M
+27%
+52%
2021
$7.2M
$4.6M
$2.9M
-9%
+28%
2020
$7.2M
$13.8M
$4.0M
-10%
+7%
Tagged by the company under SEC Item 402(v). Returns are
cumulative from the start of the disclosure period. Green where the company beat its own peer group.
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
The complete filing record, in one place.
Each figure here is a federal filing, dated the day it went public, so you can test what was knowable then.
WTM financials
Revenue growth
+66.8%
XBRL, annual
Net margin
29.6%
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$3.8B
four quarters, 2025-07-01 to 2026-06-30
Revenue, TTM WTM
| FY Dec 2025 | $3.7B |
| FY Dec 2024 | $2.2B |
| FY Dec 2023 | $2.2B |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| Jun 2026 | $844.6M |
| Mar 2026 | $517.8M |
| Dec 2025 | $1.6B |
| Sep 2025 | $864.2M |
| Jun 2025 | $689.2M |
| Mar 2025 | $577.8M |
| Dec 2024 | $358.0M |
| Sep 2024 | $839.1M |
At each fiscal year end
Single quarter
Net margin, TTM
+29.3%
net income over revenue, 2025-07-01 to 2026-06-30
Net margin, TTM WTM
| FY Dec 2025 | +29.6% |
| FY Dec 2024 | +10.3% |
| FY Dec 2023 | +23.5% |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| Jun 2026 | +23.6% |
| Mar 2026 | -5.3% |
| Dec 2025 | +52.1% |
| Sep 2025 | +13.2% |
| Jun 2025 | +17.8% |
| Mar 2025 | +5.9% |
| Dec 2024 | -36.4% |
| Sep 2024 | +21.3% |
At each fiscal year end
Single quarter
Free cash flow, TTM
n/a
capex not filed for the four quarters
Free cash flow, TTM WTM
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| Jun 2026 | n/a |
| Mar 2026 | n/a |
| Dec 2025 | n/a |
| Sep 2025 | n/a |
| Jun 2025 | n/a |
| Mar 2025 | n/a |
| Dec 2024 | n/a |
| Sep 2024 | n/a |
At each fiscal year end
Single quarter
Debt to equity
0.17x
long-term debt only, 2026-06-30; equity 2026-06-30
Debt to equity WTM
| FY Dec 2025 | 0.15x |
| FY Dec 2024 | 0.13x |
| FY Dec 2023 | 0.13x |
| FY Dec 2022 | 0.15x |
| FY Dec 2021 | 0.12x |
| Jun 2026 | 0.17x |
| Mar 2026 | 0.16x |
| Dec 2025 | 0.15x |
| Sep 2025 | 0.18x |
| Jun 2025 | 0.15x |
| Mar 2025 | 0.15x |
| Dec 2024 | 0.13x |
| Sep 2024 | 0.12x |
At each fiscal year end
Trailing four quarters at each quarter end
Cash flow to debt
0.42x
TTM operating cash flow over long-term debt only, 2026-06-30
Cash flow to debt WTM
| FY Dec 2025 | 0.66x |
| FY Dec 2024 | 1.04x |
| FY Dec 2023 | 0.72x |
| FY Dec 2022 | 0.63x |
| FY Dec 2021 | 0.09x |
| Jun 2026 | 0.42x |
| Mar 2026 | 0.74x |
| Dec 2025 | 0.66x |
| Sep 2025 | 0.64x |
| Jun 2025 | 0.68x |
| Mar 2025 | 0.75x |
| Dec 2024 | 1.04x |
| Sep 2024 | 1.00x |
At each fiscal year end
Trailing four quarters at each quarter end
Return on equity
+22.4%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on equity WTM
| FY Dec 2025 | +22.3% |
| FY Dec 2024 | +5.3% |
| FY Dec 2023 | +12.8% |
| FY Dec 2022 | +21.7% |
| FY Dec 2021 | -7.4% |
| Jun 2026 | +22.4% |
| Mar 2026 | +21.2% |
| Dec 2025 | +22.3% |
| Sep 2025 | +3.0% |
| Jun 2025 | +4.5% |
| Mar 2025 | +0.6% |
| Dec 2024 | +5.3% |
| Sep 2024 | +15.1% |
At each fiscal year end
Trailing four quarters at each quarter end
Return on assets
+8.8%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on assets WTM
| FY Dec 2025 | +10.0% |
| FY Dec 2024 | +2.5% |
| FY Dec 2023 | +6.5% |
| FY Dec 2022 | +11.0% |
| FY Dec 2021 | -4.7% |
| Jun 2026 | +8.8% |
| Mar 2026 | +8.6% |
| Dec 2025 | +10.0% |
| Sep 2025 | +1.2% |
| Jun 2025 | +1.9% |
| Mar 2025 | +0.3% |
| Dec 2024 | +2.5% |
| Sep 2024 | +7.0% |
At each fiscal year end
Trailing four quarters at each quarter end
Return on invested capital
n/a
fewer than four consecutive quarters of operating income
Return on invested capital WTM
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| Jun 2026 | n/a |
| Mar 2026 | n/a |
| Dec 2025 | n/a |
| Sep 2025 | n/a |
| Jun 2025 | n/a |
| Mar 2025 | n/a |
| Dec 2024 | n/a |
| Sep 2024 | n/a |
At each fiscal year end
Trailing four quarters at each quarter end
Return on capital employed
n/a
fewer than four consecutive quarters of operating income
Return on capital employed WTM
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| Jun 2026 | n/a |
| Mar 2026 | n/a |
| Dec 2025 | n/a |
| Sep 2025 | n/a |
| Jun 2025 | n/a |
| Mar 2025 | n/a |
| Dec 2024 | n/a |
| Sep 2024 | n/a |
At each fiscal year end
Trailing four quarters at each quarter end
P/E, trailing
5.06x
close 2026-10-27 over four quarters of diluted EPS, 2025-07-01 to 2026-06-30
P/E, trailing WTM
| FY Dec 2025 | 4.83x |
| FY Dec 2024 | 21.64x |
| FY Dec 2023 | 7.58x |
| FY Dec 2022 | 4.98x |
| FY Dec 2021 | n/a |
| Jun 2026 | 4.74x |
| Mar 2026 | 5.43x |
| Dec 2025 | 4.83x |
| Sep 2025 | 30.81x |
| Jun 2025 | 22.52x |
| Mar 2025 | 178.98x |
| Dec 2024 | 21.64x |
| Sep 2024 | 6.72x |
At each fiscal year end
Trailing four quarters at each quarter end
Enterprise value
$6.1B
market value at close 2026-10-27 on 2026-08-03 shares, plus long-term debt only, 2026-06-30, minus cash 2020-03-31
Enterprise value WTM
| FY Dec 2025 | $6.0B |
| FY Dec 2024 | $5.4B |
| FY Dec 2023 | $4.3B |
| FY Dec 2022 | $4.1B |
| FY Dec 2021 | $3.3B |
| Jun 2026 | $5.9B |
| Mar 2026 | $6.1B |
| Dec 2025 | $6.0B |
| Sep 2025 | $5.0B |
| Jun 2025 | $5.2B |
| Mar 2025 | $5.5B |
| Dec 2024 | $5.4B |
| Sep 2024 | $4.8B |
At each fiscal year end
Trailing four quarters at each quarter end
FCF yield
n/a
capex not filed for the four quarters
FCF yield WTM
| FY Dec 2025 | n/a |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| Jun 2026 | n/a |
| Mar 2026 | n/a |
| Dec 2025 | n/a |
| Sep 2025 | n/a |
| Jun 2025 | n/a |
| Mar 2025 | n/a |
| Dec 2024 | n/a |
| Sep 2024 | n/a |
At each fiscal year end
Trailing four quarters at each quarter end
PEG, trailing
0.01x
P/E over trailing EPS growth of 448%: four quarters to 2026-06-30 against the four to 2025-06-30
PEG, trailing WTM
| FY Dec 2025 | 0.01x |
| FY Dec 2024 | n/a |
| FY Dec 2023 | n/a |
| FY Dec 2022 | n/a |
| FY Dec 2021 | n/a |
| Jun 2026 | 0.01x |
| Mar 2026 | 0.00x |
| Dec 2025 | 0.01x |
| Sep 2025 | n/a |
| Jun 2025 | n/a |
| Mar 2025 | n/a |
| Dec 2024 | n/a |
| Sep 2024 | 0.05x |
At each fiscal year end
Trailing four quarters at each quarter end
Price as of 2026-10-27. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
| 2025-12 | 2024-12 | 2023-12 | 2022-12 | |
|---|---|---|---|---|
| Revenue | $3.7B | $2.2B | $2.2B | $1.2B |
| Net income | $1.1B | $230.4M | $509.2M | $792.8M |
| EPS (diluted) | 430.14 | 89.79 | 198.60 | 276.96 |
| Operating cash flow | $550.5M | $586.8M | $404.1M | $365.0M |
| Long-term debt | $837.0M | $562.5M | $564.6M | $575.2M |
| Buybacks | $202.6M | $7.9M | $32.7M | $615.8M |
| Dividends paid | $2.6M | $2.5M | $2.6M | $3.0M |
SEC XBRL, fiscal years, as known on 2026-10-28
WTM Stock Sonar score 4/7 axes
Find similar shapesCompareWTM ranks highest on growth (94th percentile) and profitability (82nd), and lowest on risk and compliance (24th), among Insurance peers.
4 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored
WTM filings, in plain words
Have members of Congress traded WTM?
Yes, but not in the year to 2026-10-28; the latest on record is a purchase by James French Hill dated 2025-06-23.
Read the full summary
Members of Congress have disclosed trades in WTM, none in the last year; the latest on record is a purchase by James French Hill dated 2025-06-23. Each figure is counted from SEC and House filings as of 2026-10-28, dated the day the filing was made public.
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