WTM

White Mountains Insurance GP
FinancialsUSCUSIP G9618E107◍ Confluence graph
Tracked 13F Holders
122
+10 QoQ
13F Value (tracked)
$1.2B
Insider Net · 180d
$0
0↑ 0↓
Recent Filings
15
Smart-money sentimentMixed
BearishBullish
13F funds (latest Q)29 adding · 20 trimming
Insider net (180d)$0
Price history not yet available for WTM.
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Ask your agent who owns WTM

This stock page is the Follow view. The Build view lets your agent query WTM owners, fund changes, insider filings, and source links through REST or MCP.

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Use Arkolith to show who owns WTM,
which funds added or reduced it, and which
SEC filings prove each claim.

Top institutional holders

122 tracked 13F filers
#FundPosition valueSharesLast moveAs ofHistory
1VANGUARD PORTFOLIO MANAGEMENT LLC
$253.9M
116K
New
+116K sh
Q1 2026
2FULLER & THALER ASSET MANAGEMENT, INC.
$229.7M
105K
−3.3%
Reduced · −4K sh
Q1 2026
3LONDON CO OF VIRGINIA
$125.5M
57K
−2.7%
Reduced · −2K sh
Q1 2026
4STATE STREET CORP
$108.0M
49K
−3.0%
Reduced · −2K sh
Q1 2026
5GENDELL JEFFREY L
$83.1M
38K
+16%
Added · +5K sh
Q1 2026
6Cannell & Spears LLC
$61.6M
28K
−0.3%
Reduced · −88 sh
Q1 2026
7SOUTHEASTERN ASSET MANAGEMENT INC/TN/
$41.4M
19K
−40%
Reduced · −13K sh
Q1 2026
8Allspring Global Investments Holdings, LLC
$40.5M
19K
−7.8%
Reduced · −2K sh
Q1 2026
9VANGUARD FIDUCIARY TRUST CO
$33.4M
15K
New
+15K sh
Q1 2026
10HORIZON KINETICS ASSET MANAGEMENT LLC
$28.8M
13K
−0.1%
Reduced · −9 sh
Q1 2026
11Gotham Asset Management, LLC
$19.9M
9K
+35%
Added · +2K sh
Q1 2026
12HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC
$13.3M
6K
−10%
Reduced · −704 sh
Q1 2026
13Williams Jones Wealth Management, LLC.
$11.4M
5K
~0%
Added · +1 sh
Q1 2026
14Edgestream Partners, L.P.
$6.9M
3K
+492%
Added · +3K sh
Q1 2026
15CITADEL ADVISORS LLC
$5.7M
3K
+118%
Added · +1K sh
Q1 2026
16MML INVESTORS SERVICES, LLC
$5.4M
2K
−16%
Reduced · −476 sh
Q1 2026
17STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM
$5.0M
2K
−19%
Reduced · −531 sh
Q1 2026
18DAVENPORT & Co LLC
$4.7M
2K
Held
Q1 2026
19PARSONS CAPITAL MANAGEMENT INC/RI
$4.1M
2K
+0.8%
Added · +16 sh
Q1 2026
20Atlantic Union Bankshares Corp
$3.9M
2K
Held
Q1 2026
21OPPENHEIMER ASSET MANAGEMENT INC.
$3.3M
1K
−1.5%
Reduced · −22 sh
Q1 2026
22Tidal Investments LLC
$3.0M
1K
+561%
Added · +1K sh
Q1 2026
23Quadrature Capital Ltd
$2.7M
1K
+237%
Added · +853 sh
Q1 2026
24State of New Jersey Common Pension Fund D
$2.5M
1K
Held
Q1 2026
25O'SHAUGHNESSY ASSET MANAGEMENT, LLC
$2.2M
1K
+8.1%
Added · +76 sh
Q1 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Fund activity: latest quarter

Opened (NEW)
6
funds
Added
23
funds
Reduced
20
funds
Exited
0
funds

Insider activity (Form 4)

Full insider page →
Buys · 180d
$0
0 insiders
Sells · 180d
$0
0 insiders
Net
$0
0 P/S txns
Signal
Mixed
open-market
DateInsiderRoleActionSharesValue
Mar 19, 2026SEELIG ROBERT LAWRENCEEVP & General CounselGift (G)50$0
Mar 4, 2026Tanner David AllenDirectorGift (G)225$0
Feb 25, 2026Caffrey Liam PChief Executive Officer, DirectorGrant (A)2K$0
Feb 25, 2026Harrison Giles EPresidentGrant (A)775$0
Feb 25, 2026SEELIG ROBERT LAWRENCEEVP & General CounselGrant (A)775$0
Feb 25, 2026Papamichael Michael AChief Financial OfficerGrant (A)500$0
Feb 25, 2026Hildreth MichaelaMD & Chief Accounting OfficerGrant (A)600$0
Jan 1, 2026Caffrey Liam PChief Executive OfficerTax withholding (F)425$883K
Jan 1, 2026SEELIG ROBERT LAWRENCEEVP & General CounselTax withholding (F)398$827K
Jan 1, 2026Papamichael Michael AChief Financial OfficerTax withholding (F)131$272K
Jan 1, 2026Hildreth MichaelaMD & Chief Accounting OfficerTax withholding (F)274$569K
Dec 23, 2025Hildreth MichaelaMD & Chief Accounting OfficerGift (G)60$0

Institutional ownership over time

238 funds+93 since Q2 2022
0119238Q2 2022Q1 2023Q4 2023Q3 2024Q2 2025Q1 2026
funds holding aggregate valuelatest $4.2B

Funds that own WTM also own

CompanyCo-held byCombined value
MICROSOFT CORPMSFT124 funds$48.9B
ELI LILLY & COLLY124 funds$12.8B
CHEVRON CORPCVX124 funds$7.9B
BANK OF AMERICA CORPBAC124 funds$5.4B
GENERAL DYNAMICS CORPGD124 funds$2.3B
NVIDIA CORPNVDA123 funds$69.4B
APPLE INCAAPL123 funds$61.5B
EXXON MOBIL CORPXOM123 funds$11.6B
WELLS FARGO & COWFC123 funds$4.7B
JPMORGAN CHASE & COJPM122 funds$17.9B
TESLA INCTSLA122 funds$14.1B
COSTCO WHOLESALE CORPCOST122 funds$8.7B

Ranked by how many of WTM's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).

Recent filings

15 shown

Browse more

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for WTM. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.