PEAK6
BRK.B icon

PEAK6’s Berkshire Hathaway Class B BRK.B Stock Holding History

PEAK6’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
Q1 		$7.19M Buy
15,000
+10,300
+219% +$5.06M 0.02% 720
2025
Q4 		$2.36M Sell
4,700
-6,800
-59% -$3.38M ﹤0.01% 1343
2025
Q3 		$5.78M Sell
11,500
-7,200
-39% -$3.49M 0.01% 956
2025
Q2 		$9.08M Sell
18,700
-49,400
-73% -$25.1M 0.02% 669
2025
Q1 		$36.3M Buy
68,100
+37,700
+124% +$18.3M 0.08% 211
2024
Q4 		$13.8M Buy
+30,400
New +$14M 0.03% 452

Other funds holding BRK.B

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Morgan Stanley
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
Gates Foundation Trust Kirkland, Washington $31.7B AUM 20.52% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

PEAK6's BRK.B Position: Q1 2026 in Review

PEAK6 reduced its Berkshire Hathaway Class B (BRK.B) stake by 71% in Q1 2026, selling an estimated $1.48M and leaving 1,257 shares worth $602K. The position accounts for ﹤0.01% of the portfolio, ranked #1906.

PEAK6 first reported a position in BRK.B in Q4 2024 and has held it in 6 quarters since. The position peaked at $2.37M in Q2 2025. 4,853 funds tracked by Wall St. Rank hold BRK.B as of Q1 2026.

  • PEAK6 held 1,257 shares of Berkshire Hathaway Class B worth $602K as of Q1 2026.
  • PEAK6 sold 3,020 Berkshire Hathaway Class B shares in Q1 2026, an estimated $1.48M.
  • Berkshire Hathaway Class B made up ﹤0.01% of PEAK6's portfolio in Q1 2026, its #1906 holding.
  • PEAK6 first reported a position in Berkshire Hathaway Class B in Q4 2024 and has held it in 6 quarters since.
  • PEAK6's Berkshire Hathaway Class B position peaked at $2.37M in Q2 2025.
  • 4,853 funds tracked by Wall St. Rank held Berkshire Hathaway Class B as of Q1 2026.

Based on PEAK6's 13F filing for Q1 2026, filed 14 May 2026.