William Blair & Company
SLRN

William Blair & Company’s ACELYRIN SLRN Stock Holding History

William Blair & Company’s Portfolio SLRN Stock Details SLRN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		– Sell
-138,595
Closed -$342K – 1892
2025
Q1 		$342K Hold
138,595
– – ﹤0.01% 1205
2024
Q4 		$435K Hold
138,595
– – ﹤0.01% 1138
2024
Q3 		$683K Hold
138,595
– – ﹤0.01% 1024
2024
Q2 		$611K Hold
138,595
– – ﹤0.01% 1036
2024
Q1 		$936K Buy
+138,595
New +$1.05M ﹤0.01% 890

Other funds holding SLRN

Osaic Holdings
Osaic Holdings Scottsdale, Arizona $68.3B AUM 20.5% 1-Year Est. Return
IA
IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

William Blair & Company's SLRN Position: Q2 2025 in Review

William Blair & Company sold out of ACELYRIN (SLRN) in Q2 2025, closing a stake of 138,595 shares — an estimated $342K sold.

William Blair & Company first reported a position in SLRN in Q1 2024 and held it in 5 quarters. The position peaked at $936K in Q1 2024. 2 funds tracked by Wall St. Rank hold SLRN as of Q2 2025.

  • William Blair & Company reported no remaining ACELYRIN position as of Q2 2025 after selling out during the quarter.
  • William Blair & Company sold 138,595 ACELYRIN shares in Q2 2025, an estimated $342K.
  • William Blair & Company first reported a position in ACELYRIN in Q1 2024 and held it in 5 quarters.
  • William Blair & Company's ACELYRIN position peaked at $936K in Q1 2024.
  • 2 funds tracked by Wall St. Rank held ACELYRIN as of Q2 2025.

Based on William Blair & Company's 13F filing for Q2 2025, filed 24 Jul 2025.