Ken Griffin
ARX

Ken Griffin’s Accelerant Holdings ARX Stock Holding History

Ken Griffin’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 		$452K Sell
33,800
-6,300
-16% -$79.6K ﹤0.01% 9546
2025
Q4 		$656K Buy
40,100
+22,000
+122% +$310K ﹤0.01% 8360
2025
Q3 		$270K Buy
+18,100
New +$424K ﹤0.01% 10603

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 $5.64B AUM 18.33% 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
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 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

Ken Griffin's ARX Position: Q1 2026 in Review

Ken Griffin increased its Accelerant Holdings (ARX) stake by 60% in Q1 2026, buying an estimated $5.42M and bringing the position to 1,144,206 shares worth $15.3M. The position accounts for ﹤0.01% of the portfolio, ranked #2664.

Ken Griffin 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.

  • Ken Griffin held 1,144,206 shares of Accelerant Holdings worth $15.3M as of Q1 2026.
  • Ken Griffin bought 428,754 Accelerant Holdings shares in Q1 2026, an estimated $5.42M.
  • Accelerant Holdings made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #2664 holding.
  • Ken Griffin 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 Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.