Citadel Advisors
MRX

Citadel Advisors’s Marex Group Limited Ordinary Shares MRX Stock Holding History

Citadel Advisors’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 		– Sell
-19,800
Closed -$760K – 14469
2025
Q4 		$760K Buy
19,800
+4,400
+29% +$150K ﹤0.01% 8024
2025
Q3 		$518K Buy
15,400
+3,900
+34% +$141K ﹤0.01% 9045
2025
Q2 		$454K Buy
11,500
+9,500
+475% +$395K ﹤0.01% 8869
2025
Q1 		$70.6K Buy
2,000
+1,100
+122% +$38.3K ﹤0.01% 11900
2024
Q4 		$28.1K Sell
900
-1,500
-63% -$42K ﹤0.01% 12931
2024
Q3 		$56.7K Sell
2,400
-600
-20% -$13.4K ﹤0.01% 11771
2024
Q2 		$60K Buy
+3,000
New +$59K ﹤0.01% 11561

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

Citadel Advisors's MRX Position: Q1 2026 in Review

Citadel Advisors increased its Marex Group Limited Ordinary Shares (MRX) stake by 93% in Q1 2026, buying an estimated $3.29M and bringing the position to 173,474 shares worth $7.73M. The position accounts for ﹤0.01% of the portfolio, ranked #3632.

Citadel Advisors first reported a position in MRX in Q2 2024 and has held it in 8 quarters since. The position peaked at $38.7M in Q2 2025. 205 funds tracked by Wall St. Rank hold MRX as of Q1 2026.

  • Citadel Advisors held 173,474 shares of Marex Group Limited Ordinary Shares worth $7.73M as of Q1 2026.
  • Citadel Advisors bought 83,415 Marex Group Limited Ordinary Shares shares in Q1 2026, an estimated $3.29M.
  • Marex Group Limited Ordinary Shares made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #3632 holding.
  • Citadel Advisors first reported a position in Marex Group Limited Ordinary Shares in Q2 2024 and has held it in 8 quarters since.
  • Citadel Advisors's Marex Group Limited Ordinary Shares position peaked at $38.7M in Q2 2025.
  • 205 funds tracked by Wall St. Rank held Marex Group Limited Ordinary Shares as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.