White Mountains Insurance Group’s MediaAlpha MAX Stock Holding History

White Mountains Insurance Group’s Portfolio MAX Stock Details MAX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$224M	Hold	17,856,614	–	–	57.03%	1
2026 Q1	$166M	Hold	17,856,614	–	–	52.99%	1
2025 Q4	$231M	Hold	17,856,614	–	–	88.28%	1
2025 Q3	$203M	Hold	17,856,614	–	–	100%	1
2025 Q2	$196M	Hold	17,856,614	–	–	100%	1
2025 Q1	$165M	Hold	17,856,614	–	–	57.7%	1
2024 Q4	$202M	Hold	17,856,614	–	–	47.31%	2
2024 Q3	$323M	Hold	17,856,614	–	–	59.53%	1
2024 Q2	$235M	Sell	17,856,614 -5,000,200	-22%	-$92M	53%	1
2024 Q1	$466M	Hold	22,856,814	–	–	75.44%	1
2023 Q4	$255M	Hold	22,856,814	–	–	64.91%	1
2023 Q3	$189M	Hold	22,856,814	–	–	42.82%	2
2023 Q2	$236M	Buy	22,856,814 +5,916,816	+35%	+$53.5M	46.37%	2
2023 Q1	$254M	Hold	16,939,998	–	–	41.52%	2
2022 Q4	$169M	Hold	16,939,998	–	–	33.55%	2
2022 Q3	$148M	Hold	16,939,998	–	–	76.15%	1
2022 Q2	$167M	Hold	16,939,998	–	–	100%	1
2022 Q1	$280M	Hold	16,939,998	–	–	100%	1
2021 Q4	$262M	Hold	16,939,998	–	–	100%	1
2021 Q3	$316M	Hold	16,939,998	–	–	100%	1
2021 Q2	$713M	Hold	16,939,998	–	–	100%	1
2021 Q1	$600M	Sell	16,939,998 -3,592,204	-17%	-$178M	100%	1
2020 Q4	$802M	Buy	+20,532,202	New	+$796M	100%	1

Other funds holding MAX

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Clearline Capital New York $1.68B AUM 53.07% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

DSCM

Divisadero Street Capital Management Miami, Florida $4.41B AUM 90.53% 1-Year Est. Return

Jacobs Levy Equity Management Florham Park, New Jersey $27.8B AUM 46.46% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return

JAM

Jacobs Asset Management New York $159M AUM 30.93% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

White Mountains Insurance Group's MAX Position: Q2 2026 in Review

White Mountains Insurance Group held its MediaAlpha (MAX) position steady in Q2 2026 at 17,856,614 shares worth $224M. The position accounts for 57.03% of the portfolio, ranked #1.

White Mountains Insurance Group first reported a position in MAX in Q4 2020 and has held it in 23 quarters since. The position peaked at $802M in Q4 2020. 153 funds tracked by Wall St. Rank hold MAX as of Q2 2026.

White Mountains Insurance Group held 17,856,614 shares of MediaAlpha worth $224M as of Q2 2026.
White Mountains Insurance Group left its MediaAlpha share count unchanged in Q2 2026.
MediaAlpha made up 57.03% of White Mountains Insurance Group's portfolio in Q2 2026, its #1 holding.
White Mountains Insurance Group first reported a position in MediaAlpha in Q4 2020 and has held it in 23 quarters since.
White Mountains Insurance Group's MediaAlpha position peaked at $802M in Q4 2020.
153 funds tracked by Wall St. Rank held MediaAlpha as of Q2 2026.

Based on White Mountains Insurance Group's 13F filing for Q2 2026, filed 12 Aug 2026.