William Blair Investment Management
MRX

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

William Blair 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 		$69.8M Sell
1,566,181
-172,746
-10% -$6.82M 0.23% 117
2025
Q4 		$66.7M Buy
1,738,927
+1,370,478
+372% +$46.6M 0.19% 129
2025
Q3 		$12.4M Sell
368,449
-442,342
-55% -$16M 0.03% 308
2025
Q2 		$32M Sell
810,791
-865,568
-52% -$36M 0.08% 194
2025
Q1 		$59.2M Sell
1,676,359
-828,367
-33% -$28.8M 0.17% 132
2024
Q4 		$78.1M Buy
2,504,726
+1,067,136
+74% +$29.9M 0.19% 123
2024
Q3 		$34M Sell
1,437,590
-4,172
-0.3% -$93.1K 0.08% 208
2024
Q2 		$28.8M Buy
+1,441,762
New +$28.3M 0.08% 228

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SC
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Jennison Associates
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Invesco
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