Guy Spier’s Berkshire Hathaway Class B BRK.B Stock Holding History

Guy Spier’s Portfolio BRK.B Stock Details BRK.B Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$48.8M	Hold	97,600	–	–	33.89%	1
2026 Q1	$46.8M	Hold	97,600	–	–	34.57%	1
2025 Q4	$49.1M	Sell	97,600 -43,000	-31%	-$21.4M	33.25%	1
2025 Q3	$70.7M	Hold	140,600	–	–	22.27%	1
2025 Q2	$68.3M	Hold	140,600	–	–	22.04%	1
2025 Q1	$74.9M	Hold	140,600	–	–	25.5%	1
2024 Q4	$63.7M	Hold	140,600	–	–	22.16%	1
2024 Q3	$64.7M	Hold	140,600	–	–	22.66%	1
2024 Q2	$57.2M	Hold	140,600	–	–	21.78%	1
2024 Q1	$59.1M	Hold	140,600	–	–	22.57%	1
2023 Q4	$50.1M	Hold	140,600	–	–	21.92%	1
2023 Q3	$49.3M	Hold	140,600	–	–	24.28%	1
2023 Q2	$47.9M	Hold	140,600	–	–	22.86%	1
2023 Q1	$43.4M	Hold	140,600	–	–	22.45%	1
2022 Q4	$43.4M	Hold	140,600	–	–	23.37%	1
2022 Q3	$37.5M	Buy	+140,600	New	+$40M	22.84%	1

Other funds holding BRK.B

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

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

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

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

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Gates Foundation Trust Kirkland, Washington $34.4B AUM 26.34% 1-Year Est. Return

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

Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return

Guy Spier's BRK.B Position: Q2 2026 in Review

Guy Spier held its Berkshire Hathaway Class B (BRK.B) position steady in Q2 2026 at 97,600 shares worth $48.8M. The position accounts for 33.89% of the portfolio, ranked #1.

Guy Spier first reported a position in BRK.B in Q3 2022 and has held it in 16 quarters since. The position peaked at $74.9M in Q1 2025. 4,897 funds tracked by Wall St. Rank hold BRK.B as of Q2 2026.

Guy Spier held 97,600 shares of Berkshire Hathaway Class B worth $48.8M as of Q2 2026.
Guy Spier left its Berkshire Hathaway Class B share count unchanged in Q2 2026.
Berkshire Hathaway Class B made up 33.89% of Guy Spier's portfolio in Q2 2026, its #1 holding.
Guy Spier first reported a position in Berkshire Hathaway Class B in Q3 2022 and has held it in 16 quarters since.
Guy Spier's Berkshire Hathaway Class B position peaked at $74.9M in Q1 2025.
4,897 funds tracked by Wall St. Rank held Berkshire Hathaway Class B as of Q2 2026.

Based on Aquamarine Zurich's 13F filing for Q2 2026, filed 10 Jul 2026.