GIM
MRX

Granahan Investment Management’s Marex Group Limited Ordinary Shares MRX Stock Holding History

Granahan Investment Management’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 		$54.6M Sell
1,223,750
-153,243
-11% -$6.05M 2.64% 8
2025
Q4 		$52.8M Buy
1,376,993
+322,039
+31% +$11M 2.26% 10
2025
Q3 		$35.5M Sell
1,054,954
-1,022,199
-49% -$36.9M 1.45% 22
2025
Q2 		$82M Sell
2,077,153
-39,907
-2% -$1.66M 3.34% 5
2025
Q1 		$74.8M Sell
2,117,060
-73,544
-3% -$2.56M 3.72% 3
2024
Q4 		$68.3M Buy
2,190,604
+957,492
+78% +$26.8M 2.85% 5
2024
Q3 		$29.1M Sell
1,233,112
-40,465
-3% -$903K 1.15% 20
2024
Q2 		$25.5M Buy
+1,273,577
New +$25M 1.02% 26

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

Granahan Investment Management's MRX Position: Q1 2026 in Review

Granahan Investment Management reduced its Marex Group Limited Ordinary Shares (MRX) stake by 11% in Q1 2026, selling an estimated $6.05M and leaving 1,223,750 shares worth $54.6M. The position accounts for 2.64% of the portfolio, ranked #8.

Granahan Investment Management first reported a position in MRX in Q2 2024 and has held it in 8 quarters since. The position peaked at $82M in Q2 2025. 205 funds tracked by Wall St. Rank hold MRX as of Q1 2026.

  • Granahan Investment Management held 1,223,750 shares of Marex Group Limited Ordinary Shares worth $54.6M as of Q1 2026.
  • Granahan Investment Management sold 153,243 Marex Group Limited Ordinary Shares shares in Q1 2026, an estimated $6.05M.
  • Marex Group Limited Ordinary Shares made up 2.64% of Granahan Investment Management's portfolio in Q1 2026, its #8 holding.
  • Granahan Investment Management first reported a position in Marex Group Limited Ordinary Shares in Q2 2024 and has held it in 8 quarters since.
  • Granahan Investment Management's Marex Group Limited Ordinary Shares position peaked at $82M in Q2 2025.
  • 205 funds tracked by Wall St. Rank held Marex Group Limited Ordinary Shares as of Q1 2026.

Based on Granahan Investment Management's 13F filing for Q1 2026, filed 15 May 2026.