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
Q2 		$13M Sell
1,109,675
-1,164,477
-51% -$16.4M 0.01% 925
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
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
KC
Keenan Capital Burlingame, California $506M AUM 7.03% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
GGHC
Gilder Gagnon Howe & Co New York $9.69B AUM 55.7% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
B
Barings Charlotte, North Carolina $5.64B AUM 18.33% 1-Year Est. Return
ACL
Azora Capital LP Miami, Florida $2.37B AUM 34.87% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Marshall Wace's ARX Position: Q2 2026 in Review

Marshall Wace reduced its Accelerant Holdings (ARX) stake by 51% in Q2 2026, selling an estimated $16.4M and leaving 1,109,675 shares worth $13M. The position accounts for 0.01% of the portfolio, ranked #925.

Marshall Wace first reported a position in ARX in Q3 2025 and has held it in 4 quarters since. The position peaked at $30.4M in Q1 2026. 116 funds tracked by Wall St. Rank hold ARX as of Q2 2026.

  • Marshall Wace held 1,109,675 shares of Accelerant Holdings worth $13M as of Q2 2026.
  • Marshall Wace sold 1,164,477 Accelerant Holdings shares in Q2 2026, an estimated $16.4M.
  • Accelerant Holdings made up 0.01% of Marshall Wace's portfolio in Q2 2026, its #925 holding.
  • Marshall Wace first reported a position in Accelerant Holdings in Q3 2025 and has held it in 4 quarters since.
  • Marshall Wace's Accelerant Holdings position peaked at $30.4M in Q1 2026.
  • 116 funds tracked by Wall St. Rank held Accelerant Holdings as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.