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WHITE MOUNTAINS INSURANCE GROUP LTD

CIK 776867 · last filed 2024-05-09

WHITE MOUNTAINS INSURANCE GROUP LTD is a corporate insider who has filed 8 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing shows the insider sold $190.0M of MAX on May 9, 2024. Across all open-market trades the lifetime net is −$440.5M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $221.1M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$221.06M

Companies

3

Total Filings

8

Lifetime Open-Market Net

-$440.52M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
MAX 10%+ Owner 17,856,614 $12.38 $221.06M -$423.84M 3 2024-05-09
OneBeacon Insurance Group, Ltd. (OB) Delisted 10%+ Owner 0 $2.74 $0 -$16.68M 2 2017-09-28
Symetra Financial CORP (SYA) Delisted 10%+ Owner 0 — — $0 3 2016-02-02

Recent Filings

8 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2024-05-09 MAX Sell (S) −10,000,400 -$190.01M EDGAR
2021-03-25 MAX Sell (S) −3,592,204 -$165.24M EDGAR
2020-11-03 MAX Sell (S) −3,609,894 -$68.59M EDGAR
2017-09-28 OneBeacon Insurance Group, Ltd. (OB) Delisted Disp (D) −71,754,738 -$1.30B EDGAR
2016-02-02 Symetra Financial CORP (SYA) Delisted Disp (D) −20,562,379 -$658.00M EDGAR
2015-07-02 Symetra Financial CORP (SYA) Delisted Other (J) +513,500 $0 EDGAR
2013-06-24 Symetra Financial CORP (SYA) Delisted Mixed +2,648,879 $6 EDGAR
2007-03-15 OneBeacon Insurance Group, Ltd. (OB) Delisted Sell (S) −645,262 -$16.68M EDGAR
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.