Skip to main content

SEI INVESTMENTS CO

Position in WTM — White Mountains Insurance Group Ltd

CIK 350894 OAKS, PA

Position in WTM

as of Mar 31, 2026 · filed May 13, 2026
Position Value
$24,381,861
+$7,932,177 QoQ
Shares Held
11,098
+40.2% QoQ
Ownership
0.465%
of shares outstanding
% of Portfolio
0.03%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in WTM Over Time

Shares Held

Position Value (USD)

Position in Insurance - Property & Casualty

Financial Services · as of Mar 31, 2026

SEI INVESTMENTS CO holds $669,538,693 across 33 Insurance - Property & Casualty names. WTM ranks #6 (3.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
6 WTM
White Mountains Insurance Group Ltd
This page
11,098 $24,381,861

All Filings in WTM

Export CSV
25 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $24,381,861 11,098
2025-12-31 $16,449,684 7,916
2025-09-30 $9,002,806 5,386
2025-06-30 $8,808,005 4,905
2025-03-31 $7,895,819 4,100
2024-12-31 $6,257,257 3,217
2024-09-30 $4,216,752 2,486
2024-06-30 $4,341,887 2,389
2024-03-31 $4,338,616 2,418
2023-12-31 $3,044,634 2,023
2023-09-30 $2,601,004 1,739
2023-06-30 $2,443,091 1,759
2023-03-31 $2,445,043 1,775
2022-12-31 $2,291,214 1,620
2022-09-30 $1,860,712 1,428
2022-06-30 $1,992,561 1,599
2022-03-31 $1,881,612 1,656
2021-12-31 $2,056,188 2,028
2021-09-30 $1,764,855 1,650
2021-06-30 $1,920,653 1,673
2021-03-31 $2,389,230 2,143
2020-12-31 $2,210,457 2,209
2020-09-30 $1,887,517 2,423
2020-06-30 $3,669,090 4,132
2020-03-31 $3,654,560 4,016