White Mountains Insurance Group Ltd

WTM

Exchange: NYSE
Industry: Fire, Marine & Casualty Insurance
SEC CIK: 0000776867

SEC filings (opens in a new tab)

No open-market purchases or sales by White Mountains Insurance Group Ltd insiders were filed in the last 90 days; 356 institutions reported holding it in 13F filings for Q2 2026, worth $4.57B in total; Southeastern Asset Management (Longleaf) is the only superinvestor holding it.

Q1 2022 vs. Q4 2021

How the institutions holding White Mountains Insurance Group Ltd changed between Q4 2021 and Q1 2022.

All holders in Q1 2022 All holders in Q4 2021

13F holders of WTM: Q4 2021 compared with Q1 2022
Measure	Q4 2021	Of which not filed for Q1 2022	Q1 2022	Change
Holders	243	3	244	+4
Shares	2.68M	188	2.69M	+16.8K (+0.6%)
Value	$2.71B	$190.0K	$3.09B	+$373.0M (+13.7%)

3 institutions that held it in Q4 2021 haven't filed for Q1 2022 yet. Not filing isn't selling, so the changes leave them out.

New holders (26)

Institutions that held White Mountains Insurance Group Ltd at the end of Q1 2022 but not at the end of Q4 2021.

Institutions new to WTM in Q1 2022
Institution	Shares	Value	% of portfolio
Select Equity Group, L.P.	41,207	$46.8M	0.15%
Madison Avenue Partners, LP	10,000	$11.4M	2.12%
Prospector Partners LLC	2,970	$3.38M	0.42%
Jane Street Group, LLC	1,014	$1.15M	0.00%
Amalgamated Financial Corp.	605	$687.0K	0.01%
Blueshift Asset Management, LLC	409	$465.0K	0.04%
Zeke Capital Advisors, LLC	342	$389.0K	0.02%
Gotham Asset Management, LLC	325	$369.0K	0.01%
Principal Financial Group Inc	283	$322.0K	0.00%
JustInvest LLC	213	$242.0K	0.01%
One Wealth Advisors, LLC	207	$235.0K	0.06%
Prudential Financial Inc	196	$223.0K	0.00%
Glenview Trust Co	193	$219.0K	0.01%
Pictet Asset Management SA	190	$216.0K	0.00%
Regions Financial Corp	189	$215.0K	0.00%
HighTower Advisors, LLC	185	$211.0K	0.00%
Investment Management of Virginia LLC	181	$206.0K	0.04%
Quantbot Technologies LP	62	$70.0K	0.01%
MetLife Investment Management	59	$67.0K	0.00%
Altshuler Shaham Ltd	56	$64.0K	0.00%
Nomura Asset Management Co Ltd	16	$18.2K	0.00%
Raleigh Capital Management Inc.	8	$9.00K	0.00%
Disciplined Investments, LLC	2	$2.00K	0.00%
Cordant, Inc.	1	$1.00K	0.00%
Schubert & Co	1	$1.00K	0.00%
CFS Investment Advisory Services, LLC	13,635	$0	0.00%

Sold out (22)

Institutions that held White Mountains Insurance Group Ltd at the end of Q4 2021 and filed for Q1 2022 without it.

Institutions that sold out of WTM in Q1 2022
Institution	Shares, Q4 2021	Value, Q4 2021
State of Alaska, Department of Revenue	2,297	$2.33M
Allianz Asset Management GmbH	2,257	$2.29M
LMR Partners LLP	1,230	$1.25M
Squarepoint Ops LLC	780	$791.0K
Virtu Financial LLC	670	$679.0K
Alpine Global Management, LLC	648	$657.0K
Schonfeld Strategic Advisors LLC	615	$623.0K
Fragasso Group Inc.	505	$512.0K
Oak Thistle LLC	393	$398.0K
Agf Investments Inc.	374	$379.0K
Personal Capital Advisors Corp	249	$252.0K
Prelude Capital Management, LLC	225	$228.0K
Marshall Wace, LLP	156	$158.0K
Outfitter Financial LLC	150	$152.0K
Metropolitan Life Insurance Co	59	$59.8K
Sageworth Trust Co	41	$42.0K
Lazard Asset Management LLC	38	$38.0K
First Horizon Advisors, Inc.	25	$25.0K
GPS Wealth Strategies Group, LLC	10	$10.0K
Dark Forest Capital Management LP	5	$5.00K
Patriot Financial Group Insurance Agency, LLC	3	$3.00K
Spire Wealth Management	3	$3.00K

Not filed for Q1 2022 yet (3)

Institutions that held White Mountains Insurance Group Ltd at the end of Q4 2021 and haven't filed a 13F for Q1 2022. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding WTM in Q4 2021 that haven't filed for Q1 2022
Institution	Shares, Q4 2021	Value, Q4 2021
Markston International LLC	170	$172.0K
NEXT Financial Group, Inc	11	$11.0K
Bell Investment Advisors, Inc	7	$7.00K