Calamos Advisors’s Berkshire Hathaway Class B BRK.B Stock Holding History

Calamos Advisors’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
2025 Q2	–	Sell	-75,800	Closed	-$34.4M	–	931
2025 Q1	$34.4M	Buy	+75,800	New	+$36.9M	0.15%	165
2023 Q1	–	Sell	-211,400	Closed	-$65.3M	–	1142
2022 Q4	$65.3M	Buy	211,400 +70,600	+50%	+$21M	0.31%	74
2022 Q3	$37.6M	Sell	140,800 -96,200	-41%	-$27.4M	0.17%	146
2022 Q2	$64.7M	Buy	+237,000	New	+$74.4M	0.28%	74

Other funds holding BRK.B

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

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

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Gates Foundation Trust Kirkland, Washington $31.7B AUM 20.52% 1-Year Est. Return

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

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

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Calamos Advisors's BRK.B Position: Q1 2026 in Review

Calamos Advisors increased its Berkshire Hathaway Class B (BRK.B) stake by 6.5% in Q1 2026, buying an estimated $8.22M and bringing the position to 273,861 shares worth $131M. The position accounts for 0.47% of the portfolio, ranked #31.

Calamos Advisors first reported a position in BRK.B in Q2 2013 and has held it in 52 quarters since. The position peaked at $154M in Q1 2025. 4,854 funds tracked by Wall St. Rank hold BRK.B as of Q1 2026.

Calamos Advisors held 273,861 shares of Berkshire Hathaway Class B worth $131M as of Q1 2026.
Calamos Advisors bought 16,740 Berkshire Hathaway Class B shares in Q1 2026, an estimated $8.22M.
Berkshire Hathaway Class B made up 0.47% of Calamos Advisors's portfolio in Q1 2026, its #31 holding.
Calamos Advisors first reported a position in Berkshire Hathaway Class B in Q2 2013 and has held it in 52 quarters since.
Calamos Advisors's Berkshire Hathaway Class B position peaked at $154M in Q1 2025.
4,854 funds tracked by Wall St. Rank held Berkshire Hathaway Class B as of Q1 2026.

Based on Calamos Advisors's 13F filing for Q1 2026, filed 4 May 2026.