William Blair Investment Management
AHL

William Blair Investment Management’s Aspen Insurance AHL Stock Holding History

William Blair Investment Management’s Portfolio AHL Stock Details AHL Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-523,682
Closed -$16.5M – 462
2025
Q2 		$16.5M Buy
+523,682
New +$17.5M 0.04% 300

Other funds holding AHL

AMH
Apollo Management Holdings New York $7.6B AUM 23.97% 1-Year Est. Return
HI
HBK Investments Dallas, Texas $9.85B AUM 55.6% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
MF
Magnetar Financial Evanston, Illinois $9.84B AUM 190.63% 1-Year Est. Return
NI
Nuance Investments Kansas City, Missouri $588M AUM 6.93% 1-Year Est. Return
GCL
Glazer Capital LLC New York $4.71B AUM 81.93% 1-Year Est. Return
Fidelity International
Fidelity International Hamilton, Bermuda $129B AUM 30.83% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
WIC
Water Island Capital New York $896M AUM 107.59% 1-Year Est. Return

William Blair Investment Management's AHL Position: Q3 2025 in Review

William Blair Investment Management sold out of Aspen Insurance (AHL) in Q3 2025, closing a stake of 523,682 shares — an estimated $16.5M sold.

William Blair Investment Management first reported a position in AHL in Q2 2025 and held it in 1 quarter. The position peaked at $16.5M in Q2 2025. 93 funds tracked by Wall St. Rank hold AHL as of Q3 2025.

  • William Blair Investment Management reported no remaining Aspen Insurance position as of Q3 2025 after selling out during the quarter.
  • William Blair Investment Management sold 523,682 Aspen Insurance shares in Q3 2025, an estimated $16.5M.
  • William Blair Investment Management first reported a position in Aspen Insurance in Q2 2025 and held it in 1 quarter.
  • William Blair Investment Management's Aspen Insurance position peaked at $16.5M in Q2 2025.
  • 93 funds tracked by Wall St. Rank held Aspen Insurance as of Q3 2025.

Based on William Blair Investment Management's 13F filing for Q3 2025, filed 12 Nov 2025.