White Mountains Insurance
322 hedge funds and large institutions have $4.44B invested in White Mountains Insurance in 2025 Q1 according to their latest regulatory filings, with 26 funds opening new positions, 103 increasing their positions, 107 reducing their positions, and 26 closing their positions.
17% more funds holding in top 10
Funds holding in top 10: 6 → 7 (+1)
1.58% more ownership
Funds ownership: 88.61% → 90.18% (+1.6%)
0% more capital invested
Capital invested by funds: $4.43B → $4.44B (+$12.3M)
0% more first-time investments, than exits
New positions opened: 26 | Existing positions closed: 26
1% less funds holding
Funds holding: 324 → 322 (-2)
4% less repeat investments, than reductions
Existing positions increased: 103 | Existing positions reduced: 107
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
FMI
Fiduciary Management Inc
Milwaukee,
Wisconsin
|
+$42.7M |
| 2 |
CB
Cooke & Bieler
Philadelphia,
Pennsylvania
|
+$38.7M |
| 3 |
Neuberger Berman Group
New York
|
+$21.5M |
| 4 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
+$8.87M |
| 5 |
Victory Capital Management
San Antonio,
Texas
|
+$8.55M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Wellington Management Group
Boston,
Massachusetts
|
-$46.1M |
| 2 |
Morgan Stanley
New York
|
-$13.3M |
| 3 |
Fuller & Thaler Asset Management
San Mateo,
California
|
-$7.5M |
| 4 |
RRAM
River Road Asset Management
Louisville,
Kentucky
|
-$5.18M |
| 5 |
KBC Group
Brussels,
Belgium
|
-$3.64M |
WTM Hedge Fund Activity: Q1 2025 in Review
322 of the 7,472 institutional investors tracked by Wall St. Rank reported a position in White Mountains Insurance (WTM) for Q1 2025, worth a combined $4.44B — up 0.28% from $4.43B a quarter earlier.
Fund positioning in WTM was balanced in Q1 2025: 26 funds opened new positions, 26 closed out, 103 added to existing stakes and 107 trimmed.
The largest buyer was Fiduciary Management Inc, adding an estimated $42.7M. The largest seller was Wellington Management Group, cutting an estimated $46.1M.
- 322 institutional investors held White Mountains Insurance (WTM) as of Q1 2025, down from 324 in Q4 2024.
- Funds reported $4.44B of White Mountains Insurance stock for Q1 2025, up 0.28% quarter-over-quarter.
- 26 funds opened new White Mountains Insurance positions in Q1 2025 and 26 closed out, a net change of 0 holders.
- The largest White Mountains Insurance buyer in Q1 2025 was Fiduciary Management Inc, an estimated $42.7M added.
- The largest White Mountains Insurance seller in Q1 2025 was Wellington Management Group, an estimated $46.1M sold.
Based on aggregated 13F filings for Q1 2025.