Jane Street
MRX

Jane Street’s Marex Group Limited Ordinary Shares MRX Stock Holding History

Jane Street’s Portfolio MRX Stock Details MRX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$526K Sell
11,810
-977
-8% -$38.6K ﹤0.01% 7931
2025
Q4 		$491K Sell
12,787
-47,934
-79% -$1.63M ﹤0.01% 7723
2025
Q3 		$2.04M Buy
60,721
+20,045
+49% +$724K ﹤0.01% 4887
2025
Q2 		$1.61M Buy
40,676
+11,216
+38% +$467K ﹤0.01% 4778
2025
Q1 		$1.04M Buy
+29,460
New +$1.03M ﹤0.01% 5500
2024
Q4 		– Sell
-24,227
Closed -$572K – 10805
2024
Q3 		$572K Buy
+24,227
New +$541K ﹤0.01% 6959

Other funds holding MRX

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Loomis, Sayles & Company
Loomis, Sayles & Company Boston, Massachusetts $74.3B AUM 24.01% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
SC
Samlyn Capital New York $5.86B AUM 36.3% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $145B AUM 34.61% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $30.3B AUM 33.75% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return

Jane Street's MRX Position: Q1 2026 in Review

Jane Street reduced its Marex Group Limited Ordinary Shares (MRX) stake by 7.6% in Q1 2026, selling an estimated $38.6K and leaving 11,810 shares worth $526K. The position accounts for ﹤0.01% of the portfolio, ranked #7931.

Jane Street first reported a position in MRX in Q3 2024 and has held it in 6 quarters since. The position peaked at $2.04M in Q3 2025. 205 funds tracked by Wall St. Rank hold MRX as of Q1 2026.

  • Jane Street held 11,810 shares of Marex Group Limited Ordinary Shares worth $526K as of Q1 2026.
  • Jane Street sold 977 Marex Group Limited Ordinary Shares shares in Q1 2026, an estimated $38.6K.
  • Marex Group Limited Ordinary Shares made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #7931 holding.
  • Jane Street first reported a position in Marex Group Limited Ordinary Shares in Q3 2024 and has held it in 6 quarters since.
  • Jane Street's Marex Group Limited Ordinary Shares position peaked at $2.04M in Q3 2025.
  • 205 funds tracked by Wall St. Rank held Marex Group Limited Ordinary Shares as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.