White Mountains Insurance Group’s State Street SPDR S&P 500 ETF Trust SPY Stock Holding History

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

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$147M	Buy	226,500 +181,500	+403%	+$123M	47.01%	2
2025 Q4	$30.7M	Buy	+45,000	New	+$30.4M	11.72%	2
2025 Q2	–	Sell	-216,197	Closed	-$121M	–	2
2025 Q1	$121M	Sell	216,197 -166,949	-44%	-$98.1M	42.3%	2
2024 Q4	$225M	Hold	383,146	–	–	52.69%	1
2024 Q3	$220M	Hold	383,146	–	–	40.47%	2
2024 Q2	$209M	Buy	383,146 +93,300	+32%	+$48.8M	47%	2
2024 Q1	$152M	Hold	289,846	–	–	24.56%	2
2023 Q4	$138M	Sell	289,846 -300,000	-51%	-$134M	35.09%	2
2023 Q3	$252M	Sell	589,846 -25,000	-4%	-$11.1M	57.18%	1
2023 Q2	$273M	Sell	614,846 -258,100	-30%	-$108M	53.63%	1
2023 Q1	$357M	Hold	872,946	–	–	58.48%	1
2022 Q4	$334M	Buy	872,946 +742,946	+571%	+$286M	66.45%	1
2022 Q3	$46.4M	Buy	+130,000	New	+$51.6M	23.85%	2

Other funds holding SPY

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return

LPL Financial San Diego, California $377B AUM 19.32% 1-Year Est. Return

Wells Fargo San Francisco, California $530B AUM 22.01% 1-Year Est. Return

White Mountains Insurance Group's SPY Position: Q1 2026 in Review

White Mountains Insurance Group increased its State Street SPDR S&P 500 ETF Trust (SPY) stake by 403% in Q1 2026, buying an estimated $123M and bringing the position to 226,500 shares worth $147M. The position accounts for 47.01% of the portfolio, ranked #2.

White Mountains Insurance Group first reported a position in SPY in Q3 2022 and has held it in 13 quarters since. The position peaked at $357M in Q1 2023. 4,559 funds tracked by Wall St. Rank hold SPY as of Q1 2026.

White Mountains Insurance Group held 226,500 shares of State Street SPDR S&P 500 ETF Trust worth $147M as of Q1 2026.
White Mountains Insurance Group bought 181,500 State Street SPDR S&P 500 ETF Trust shares in Q1 2026, an estimated $123M.
State Street SPDR S&P 500 ETF Trust made up 47.01% of White Mountains Insurance Group's portfolio in Q1 2026, its #2 holding.
White Mountains Insurance Group first reported a position in State Street SPDR S&P 500 ETF Trust in Q3 2022 and has held it in 13 quarters since.
White Mountains Insurance Group's State Street SPDR S&P 500 ETF Trust position peaked at $357M in Q1 2023.
4,559 funds tracked by Wall St. Rank held State Street SPDR S&P 500 ETF Trust as of Q1 2026.

Based on White Mountains Insurance Group's 13F filing for Q1 2026, filed 12 May 2026.