Marshall Wace
ARX

Marshall Wace’s Accelerant Holdings ARX Stock Holding History

Marshall Wace’s Portfolio ARX Stock Details ARX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$30.4M Buy
2,274,152
+1,926,005
+553% +$24.3M 0.03% 546
2025
Q4 		$5.69M Buy
348,147
+242,932
+231% +$3.42M 0.01% 1096
2025
Q3 		$1.57M Buy
+105,215
New +$2.46M ﹤0.01% 1728

Other funds holding ARX

SBLIC
Security Benefit Life Insurance Company Topeka, Kansas $182M AUM 31.21% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
KC
Keenan Capital Burlingame, California $474M AUM 2.41% 1-Year Est. Return
GGHC
Gilder Gagnon Howe & Co New York $8.34B AUM 46.58% 1-Year Est. Return
B
Barings Charlotte, North Carolina $6.19B AUM 16.5% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
ACL
Azora Capital LP Miami, Florida $1.52B AUM 39.16% 1-Year Est. Return

Marshall Wace's ARX Position: Q1 2026 in Review

Marshall Wace increased its Accelerant Holdings (ARX) stake by 553% in Q1 2026, buying an estimated $24.3M and bringing the position to 2,274,152 shares worth $30.4M. The position accounts for 0.03% of the portfolio, ranked #546.

Marshall Wace first reported a position in ARX in Q3 2025 and has held it in 3 quarters since. 107 funds tracked by Wall St. Rank hold ARX as of Q1 2026.

  • Marshall Wace held 2,274,152 shares of Accelerant Holdings worth $30.4M as of Q1 2026.
  • Marshall Wace bought 1,926,005 Accelerant Holdings shares in Q1 2026, an estimated $24.3M.
  • Accelerant Holdings made up 0.03% of Marshall Wace's portfolio in Q1 2026, its #546 holding.
  • Marshall Wace first reported a position in Accelerant Holdings in Q3 2025 and has held it in 3 quarters since.
  • 107 funds tracked by Wall St. Rank held Accelerant Holdings as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.