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Cubist Systematic Strategies’s Berkshire Hathaway Class B BRK.B Stock Holding History

Cubist Systematic Strategies’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
Q3 		$49.4M Sell
98,200
-13,700
-12% -$6.64M 0.24% 66
2025
Q2 		$54.4M Buy
111,900
+54,300
+94% +$27.6M 0.25% 49
2025
Q1 		$30.7M Sell
57,600
-10,100
-15% -$4.91M 0.19% 97
2024
Q4 		$30.7M Sell
67,700
-6,300
-9% -$2.91M 0.19% 83
2024
Q3 		$34.1M Buy
74,000
+18,500
+33% +$8.18M 0.21% 77
2024
Q2 		$22.6M Buy
55,500
+1,800
+3% +$736K 0.15% 133
2024
Q1 		$22.6M Sell
53,700
-2,800
-5% -$1.1M 0.13% 154
2023
Q4 		$20.2M Buy
56,500
+29,800
+112% +$10.5M 0.13% 158
2023
Q3 		$9.35M Sell
26,700
-14,500
-35% -$5.14M 0.07% 410
2023
Q2 		$14M Sell
41,200
-11,100
-21% -$3.62M 0.09% 267
2023
Q1 		$16.1M Sell
52,300
-6,600
-11% -$2.03M 0.1% 218
2022
Q4 		$18.2M Buy
58,900
+38,700
+192% +$11.5M 0.11% 183
2022
Q3 		$5.39M Buy
+20,200
New +$5.75M 0.03% 1012

Other funds holding BRK.B

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
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
Gates Foundation Trust
Gates Foundation Trust Kirkland, Washington $31.7B AUM 20.52% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return
Charles Schwab
Charles Schwab San Francisco, California $654B AUM 26.35% 1-Year Est. Return

Cubist Systematic Strategies's BRK.B Position: Q3 2025 in Review

Cubist Systematic Strategies opened a new position in Berkshire Hathaway Class B (BRK.B) in Q3 2025: 6,164 shares worth $3.1M. The stake represents 0.01% of the portfolio and ranks #1289 among its holdings. This is a return to the name: Cubist Systematic Strategies previously reported a position in BRK.B as recently as Q1 2023.

Cubist Systematic Strategies first reported a position in BRK.B in Q2 2014 and has held it in 37 quarters since. The position peaked at $33.6M in Q2 2022. 4,578 funds tracked by Wall St. Rank hold BRK.B as of Q3 2025.

  • Cubist Systematic Strategies held 6,164 shares of Berkshire Hathaway Class B worth $3.1M as of Q3 2025.
  • Berkshire Hathaway Class B was a new Cubist Systematic Strategies position in Q3 2025.
  • Berkshire Hathaway Class B made up 0.01% of Cubist Systematic Strategies's portfolio in Q3 2025, its #1289 holding.
  • Cubist Systematic Strategies first reported a position in Berkshire Hathaway Class B in Q2 2014 and has held it in 37 quarters since.
  • Cubist Systematic Strategies's Berkshire Hathaway Class B position peaked at $33.6M in Q2 2022.
  • 4,578 funds tracked by Wall St. Rank held Berkshire Hathaway Class B as of Q3 2025.

Based on Cubist Systematic Strategies's 13F filing for Q3 2025, filed 14 Nov 2025.