Skip to main content

White Mountains Insurance Group Ltd

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

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.

13F holders, Q1 2023

Institutional positions in White Mountains Insurance Group Ltd as of Mar 31, 2023. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
262
+3 vs. Q4 2022
Shares held
2.24M
+6.41K (+0.3%) vs. Q4 2022
Total value
$3.09B
−$71.8M (−2.3%) vs. Q4 2022
New holders
24
76 more added
Sold out
21
90 more reduced

6 institutions that held it in Q4 2022 haven't filed for Q1 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q4 2022: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting WTM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2023: 262 institutions
Q1 2021: 245 institutionsQ2 2021: 233 institutionsQ3 2021: 232 institutionsQ4 2021: 243 institutionsQ1 2022: 244 institutionsQ2 2022: 259 institutionsQ3 2022: 251 institutionsQ4 2022: 265 institutionsQ1 2023: 262 institutionsQ2 2023: 258 institutionsQ3 2023: 272 institutionsQ4 2023: 295 institutionsQ1 2024: 303 institutionsQ2 2024: 306 institutionsQ3 2024: 304 institutionsQ4 2024: 325 institutionsQ1 2025: 322 institutionsQ2 2025: 325 institutionsQ3 2025: 338 institutionsQ4 2025: 353 institutionsQ1 2026: 368 institutionsQ2 2026: 356 institutions
Value heldQ1 2023: $3.09B
Q1 2021: $3.02BQ2 2021: $3.11BQ3 2021: $2.86BQ4 2021: $2.71BQ1 2022: $3.09BQ2 2022: $3.32BQ3 2022: $2.98BQ4 2022: $3.20BQ1 2023: $3.09BQ2 2023: $3.13BQ3 2023: $3.40BQ4 2023: $3.42BQ1 2024: $4.06BQ2 2024: $4.14BQ3 2024: $3.78BQ4 2024: $4.43BQ1 2025: $4.44BQ2 2025: $4.17BQ3 2025: $3.89BQ4 2025: $4.67BQ1 2026: $4.86BQ2 2026: $4.57B
Institutions holding WTM and their total value by quarter
QuarterHoldersValue
Q2 2026356$4.57B
Q1 2026368$4.86B
Q4 2025353$4.67B
Q3 2025338$3.89B
Q2 2025325$4.17B
Q1 2025322$4.44B
Q4 2024325$4.43B
Q3 2024304$3.78B
Q2 2024306$4.14B
Q1 2024303$4.06B
Q4 2023295$3.42B
Q3 2023272$3.40B
Q2 2023258$3.13B
Q1 2023262$3.09B
Q4 2022265$3.20B
Q3 2022251$2.98B
Q2 2022259$3.32B
Q1 2022244$3.09B
Q4 2021243$2.71B
Q3 2021232$2.86B
Q2 2021233$3.11B
Q1 2021245$3.02B

Institutions, Q1 2023

Shares, value and share of portfolio for each institution holding White Mountains Insurance Group Ltd; share changes are against Q4 2022.

Institutions holding WTM in Q1 2023
InstitutionSharesValue% of portfolioChange in sharesAction
Exchange Traded Concepts, LLC1$1.38K0.00%−1−50.0%Reduced
Earnest Partners LLC1$1.38K0.00%00.0%Unchanged
AdvisorNet Financial, Inc1$1.38K0.00%00.0%Unchanged
Clearview Wealth Advisors LLC1$1.38K0.00%+1New
Versant Capital Management, Inc2$2.75K0.00%00.0%Unchanged
Schubert & Co2$2.75K0.00%+1+100.0%Added
SJS Investment Consulting Inc.2$2.76K0.00%+1+100.0%Added
International Assets Investment Management, LLC3$4.13K0.00%+3New
TCI Wealth Advisors, Inc.3$4.13K0.00%00.0%Unchanged
IFP Advisors, Inc5$4.53K0.00%−37−88.1%Reduced
Steward Financial Group LLC4$5.00K0.00%+2+100.0%Added
Loomis Sayles & Co L P4$6.00K0.00%−23−85.2%Reduced
JFS Wealth Advisors, LLC5$6.89K0.00%00.0%Unchanged
Grey Fox Wealth Advisors, LLC5$6.89K0.00%+5New
GWM Advisors LLC6$8.26K0.00%+4+200.0%Added
EverSource Wealth Advisors, LLC6$8.27K0.00%00.0%Unchanged
Private Trust Co NA6$8.27K0.00%00.0%Unchanged
Covestor Ltd6$9.00K0.01%00.0%Unchanged
Huntington National Bank7$9.64K0.00%+6+600.0%Added
Bell Investment Advisors, Inc7$9.64K0.00%00.0%Unchanged
Bartlett & Co. LLC8$11.0K0.00%00.0%Unchanged
Advisory Services Network, LLC8$11.0K0.00%00.0%Unchanged
Bartlett & Co. Wealth Management LLC8$11.0K0.00%00.0%Unchanged
Raleigh Capital Management Inc.8$11.0K0.01%00.0%Unchanged
Proequities, Inc.10$13.8K0.00%+1+11.1%Added
Bessemer Group Inc10$14.0K0.00%00.0%Unchanged
Capital Advisors, Ltd. LLC10$14.0K0.00%+1+11.1%Added
Parallel Advisors, LLC11$15.2K0.00%00.0%Unchanged
Nomura Asset Management Co Ltd12$16.5K0.00%−14−53.8%Reduced
Northwestern Mutual Wealth Management Co14$19.3K0.00%−10−41.7%Reduced
CWM, LLC16$22.0K0.00%−6−27.3%Reduced
Quadrant Capital Group LLC16$22.0K0.00%00.0%Unchanged
Delta Asset Management LLC19$26.2K0.00%00.0%Unchanged
Sageworth Trust Co of South Dakota21$28.9K0.07%00.0%Unchanged
Centerpoint Advisors, LLC25$34.0K0.01%00.0%Unchanged
First Horizon Advisors, Inc.25$34.4K0.00%00.0%Unchanged
American International Group, Inc.26$35.8K0.00%00.0%Unchanged
Federation des caisses Desjardins du Quebec27$37.2K0.00%00.0%Unchanged
Venturi Wealth Management, LLC37$51.0K0.00%+37New
Valley National Advisers Inc40$60.0K0.01%00.0%Unchanged
Anchor Investment Management, LLC50$68.9K0.01%00.0%Unchanged
MetLife Investment Management52$71.6K0.00%00.0%Unchanged
Signaturefd, LLC53$73.0K0.00%−2−3.6%Reduced
Parkside Financial Bank & Trust56$77.1K0.02%+5+9.8%Added
Quent Capital, LLC57$78.5K0.01%00.0%Unchanged
TD Private Client Wealth LLC60$82.6K0.00%−1−1.6%Reduced
Colonial Trust Co61$84.0K0.02%00.0%Unchanged
Community Bank, N.A.67$92.3K0.01%00.0%Unchanged
Steward Partners Investment Advisory, LLC75$103.3K0.00%00.0%Unchanged
BNP Paribas Arbitrage, SA95$130.9K0.00%−101−51.5%Reduced
Smithfield Trust Co97$134.0K0.01%00.0%Unchanged
Baldwin Brothers Inc100$137.7K0.01%00.0%Unchanged
Dark Forest Capital Management LP104$143.3K0.03%+104New
Central Trust Co110$151.5K0.00%00.0%Unchanged
Deutsche Bank AG120$165.3K0.00%00.0%Unchanged
Johnson Financial Group, Inc.120$165.3K0.01%+120New
SRS Capital Advisors, Inc.120$165.8K0.02%+4+3.4%Added
Ronald Blue Trust, Inc.119$168.0K0.00%+46+63.0%Added
Lindbrook Capital, LLC134$184.6K0.02%+3+2.3%Added
Tower Research Capital LLC (TRC)139$192.0K0.01%+114+456.0%Added
Blueshift Asset Management, LLC148$203.9K0.09%+148New
Equitable Trust Co150$206.6K0.02%00.0%Unchanged
Outfitter Financial LLC150$206.6K0.19%00.0%Unchanged
Empower Advisory Group, LLC151$207.9K0.00%+151New
Moneta Group Investment Advisors LLC153$210.8K0.01%+14+10.1%Added
Squarepoint Ops LLC155$213.5K0.00%−60−27.9%Reduced
US Bancorp156$214.9K0.00%−7−4.3%Reduced
First Manhattan Co156$214.9K0.00%00.0%Unchanged
Equity Investment Corp159$219.0K0.01%+159New
Triasima Portfolio Management inc.160$220.4K0.02%+160New
Isthmus Partners, LLC164$225.9K0.03%00.0%Unchanged
Contravisory Investment Management, Inc.165$227.3K0.06%+165New
Prudential Financial Inc165$227.4K0.00%+11+7.1%Added
Investment Management of Virginia LLC181$249.3K0.05%00.0%Unchanged
Sequoia Financial Advisors, LLC196$270.0K0.01%00.0%Unchanged
Susquehanna International Group, LLP198$272.7K0.00%−115−36.7%Reduced
Folger Nolan Fleming Douglas Capital Management, Inc199$274.0K0.03%00.0%Unchanged
Neville Rodie & Shaw Inc200$275.0K0.02%00.0%Unchanged
Evercore Wealth Management, LLC200$275.5K0.01%00.0%Unchanged
One Wealth Advisors, LLC208$286.5K0.07%00.0%Unchanged
Opal Wealth Advisors, LLC210$289.3K0.17%+3+1.4%Added
M&T Bank Corp210$289.3K0.00%−7−3.2%Reduced
SG Americas Securities, LLC211$291.0K0.00%−102−32.6%Reduced
Connable Office Inc216$297.5K0.04%−21−8.9%Reduced
Mercer Global Advisors Inc216$298.0K0.00%−26−10.7%Reduced
JustInvest LLC221$304.4K0.01%00.0%Unchanged
Icon Wealth Partners, LLC222$305.8K0.03%+222New
Hudson Value Partners, LLC225$309.9K0.18%00.0%Unchanged
Y-Intercept (Hong Kong) Ltd228$314.1K0.04%+228New
Athena Investment Management234$322.3K0.23%00.0%Unchanged
Legato Capital Management LLC242$333.4K0.06%−49−16.8%Reduced
Dean Capital Management242$333.4K0.44%−49−16.8%Reduced
Acrisure Capital Management, LLC244$336.1K0.34%−242−49.8%Reduced
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main252$347.1K0.00%+252New
Zurcher Kantonalbank (Zurich Cantonalbank)253$348.5K0.00%00.0%Unchanged
Principal Financial Group Inc254$349.9K0.00%+2+0.8%Added
Soltis Investment Advisors LLC256$352.6K0.04%00.0%Unchanged
Bank of Nova Scotia260$358.1K0.00%+24+10.2%Added
Mutual Advisors, LLC266$366.4K0.02%+266New
Essex Savings Bank269$370.5K0.13%00.0%Unchanged