White Mountains Insurance Group (WTM) Ownership - Who Owns White Mountains Insurance Group?

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White Mountains Insurance Group (WTM) Ownership Overview

3.12% Insiders

36.91% Mutual Funds

38.28% Other Institutional Investors

15.13% ETFs

6.56% Public Companies and

Individual Investors

The ownership structure of White Mountains Insurance Group (WTM) stock is a mix of institutional, retail, and individual investors. Approximately 90.32% of the company’s stock is owned by Institutional Investors, 3.12% is owned by Insiders, and 6.56% is owned by Public Companies and Individual Investors.

The ownership structure of White Mountains Insurance Group (WTM) stock is a mix of institutional, retail, and individual investors. Approximately 75.19% of the company’s stock is owned by Institutional Investors, 3.12% is owned by Insiders, and 15.13% is owned by Public Companies and Individual Investors.

Recent Insider Trading Activity

Date	Name	Activity	Value
Dec 22, 2025	George Manning Rountree	xxxxxxxxxxxxx	$10250000
Dec 16, 2025	Philip A Gelston	xxxxxxxxxxxxx	$338004

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Recent Hedge Fund Trading Activity

Date	Firm	Activity	Value
Mar 31, 2024	Hotchkis & Wiley Capital Management Llc	xxxxxxxxxxxxx	$13287214
Mar 31, 2024	Southeastern Asset Management Inc	xxxxxxxxxxxxx	$41443453
Mar 31, 2024	Royce & Associates Llc	xxxxxxxxxxxxx	$14192362
Mar 31, 2024	Brandes Investment Partners Lp	xxxxxxxxxxxxx	$1533478

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Top Shareholders

# of Shares	Type	% Holding	Value
205,460	Institution	8.30%	423,664,684
195,732	Institution	7.90%	403,605,256
150,745	Institution	6.09%	310,840,712
87,315	Institution	3.53%	180,046,149
85,474	Institution	3.45%	176,249,952
51,650	Institution	2.09%	106,503,850
46,604	Institution	1.88%	96,098,846
40,000	Institution	1.62%	82,481,200
38,176	Institution	1.54%	78,720,057
35,203	Institution	1.42%	72,589,642

Top Mutual Fund Holders

# of Shares	Type	% Holding	Value
195,732	Institution	7.90%	403,605,256
150,745	Institution	6.09%	310,840,712
87,315	Institution	3.53%	180,046,149
85,474	Institution	3.45%	176,249,952
51,650	Institution	2.09%	106,503,850
40,000	Institution	1.62%	82,481,200
38,176	Institution	1.54%	78,720,057
34,061	Institution	1.38%	70,234,804
23,074	Institution	0.93%	47,579,280
12,851	Institution	0.52%	26,499,148

Top ETF Holders

Holder	# of Shares	Type	% Holding	Value
Vanguard Total Stock Market ETF	77,056	Institution	3.11%	171,988,221
Vanguard Small-Cap ETF	55,884	Institution	2.26%	124,732,529
Vanguard Small Cap Value ETF	35,634	Institution	1.44%	78,286,473
Vanguard Extended Market ETF	27,647	Institution	1.12%	61,707,828
Avantis U.S. Small Cap Value ETF	24,591	Institution	0.99%	50,775,989
Dimensional U.S. Targeted Value ETF	17,311	Institution	0.70%	35,744,099
Dimensional US Small Cap Value ETF	12,612	Institution	0.51%	26,041,510
Schwab U.S. Small-Cap ETF	11,765	Institution	0.48%	24,292,607
iShares Russell Midcap ETF	9,817	Institution	0.40%	20,242,949
Dimensional U.S. Small Cap ETF	7,577	Institution	0.31%	15,645,141

FAQ

Who Owns White Mountains Insurance Group (WTM)?

According to the latest TipRanks data, approximately 38.28% of the company's stock is held by institutional investors, 3.12% is held by insiders, and 6.56% is held by retail investors.

What percentage of White Mountains Insurance Group (WTM) stock is held by institutional investors?

According to the latest TipRanks data, approximately 38.28% of White Mountains Insurance Group (WTM) stock is held by institutional investors.

What percentage of White Mountains Insurance Group (WTM) stock is held by retail investors?

According to the latest TipRanks data, approximately 6.56% of White Mountains Insurance Group (WTM) stock is held by retail investors.

Who owns the most shares of White Mountains Insurance Group (WTM)?

Vanguard owns the most shares of White Mountains Insurance Group (WTM).

What is the significance of the ownership structure for a publicly traded company?

The ownership structure can impact the company's decision making, as large institutional investors may exert influence on the company's management and can also affect the company's stock price with their buying and selling patterns.