William John Sempolinski’s Berkshire Hathaway Class B BRK.B Stock Holding History

William John Sempolinski’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	$1.76M	Buy	+3,510	New	+$1.69M	0.71%	32

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

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

Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return

William John Sempolinski's BRK.B Position: Q2 2026 in Review

William John Sempolinski opened a new position in Berkshire Hathaway Class B (BRK.B) in Q2 2026: 3,510 shares worth $1.76M. The stake represents 0.71% of the portfolio and ranks #32 among its holdings.

4,742 funds tracked by Wall St. Rank hold BRK.B as of Q2 2026.

William John Sempolinski held 3,510 shares of Berkshire Hathaway Class B worth $1.76M as of Q2 2026.
Berkshire Hathaway Class B was a new William John Sempolinski position in Q2 2026.
Berkshire Hathaway Class B made up 0.71% of William John Sempolinski's portfolio in Q2 2026, its #32 holding.
4,742 funds tracked by Wall St. Rank held Berkshire Hathaway Class B as of Q2 2026.

Based on William John Sempolinski's 13F filing for Q2 2026, filed 14 Aug 2026.