MG
BRK.B icon

Marex Group’s Berkshire Hathaway Class B BRK.B Stock Holding History

Marex Group’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 		– Sell
-140,000
Closed -$70.4M – 1041
2025
Q4 		$70.4M Buy
140,000
+25,000
+22% +$12.4M 0.44% 58
2025
Q3 		$57.8M Sell
115,000
-285,000
-71% -$138M 0.41% 55
2025
Q2 		$194M Buy
+400,000
New +$203M 1.69% 11

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

Marex Group's BRK.B Position: Q1 2026 in Review

Marex Group reduced its Berkshire Hathaway Class B (BRK.B) stake by 62% in Q1 2026, selling an estimated $14.5M and leaving 18,344 shares worth $8.79M. The position accounts for 0.06% of the portfolio, ranked #169.

Marex Group first reported a position in BRK.B in Q3 2023 and has held it in 10 quarters since. The position peaked at $101M in Q2 2025. 4,852 funds tracked by Wall St. Rank hold BRK.B as of Q1 2026.

  • Marex Group held 18,344 shares of Berkshire Hathaway Class B worth $8.79M as of Q1 2026.
  • Marex Group sold 29,627 Berkshire Hathaway Class B shares in Q1 2026, an estimated $14.5M.
  • Berkshire Hathaway Class B made up 0.06% of Marex Group's portfolio in Q1 2026, its #169 holding.
  • Marex Group first reported a position in Berkshire Hathaway Class B in Q3 2023 and has held it in 10 quarters since.
  • Marex Group's Berkshire Hathaway Class B position peaked at $101M in Q2 2025.
  • 4,852 funds tracked by Wall St. Rank held Berkshire Hathaway Class B as of Q1 2026.

Based on Marex Group's 13F filing for Q1 2026, filed 13 May 2026.