BlackRock
SLRN

BlackRock’s ACELYRIN SLRN Stock Holding History

BlackRock’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
-5,805,096
Closed -$14.3M – 5578
2025
Q1 		$14.3M Sell
5,805,096
-215,772
-4% -$513K ﹤0.01% 3126
2024
Q4 		$18.9M Buy
6,020,868
+38,494
+0.6% +$186K ﹤0.01% 3088
2024
Q3 		$29.5M Buy
5,982,374
+713,000
+14% +$3.68M ﹤0.01% 2796
2024
Q2 		$23.2M Buy
5,269,374
+476,644
+10% +$2.23M ﹤0.01% 2886
2024
Q1 		$32.4M Buy
4,792,730
+1,885,172
+65% +$14.3M ﹤0.01% 2706
2023
Q4 		$21.7M Buy
2,907,558
+709,436
+32% +$6.05M ﹤0.01% 2979
2023
Q3 		$22.4M Buy
2,198,122
+1,350,227
+159% +$28.7M ﹤0.01% 2878
2023
Q2 		$17.7M Buy
+847,895
New +$17.3M ﹤0.01% 3115

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

BlackRock's SLRN Position: Q2 2025 in Review

BlackRock sold out of ACELYRIN (SLRN) in Q2 2025, closing a stake of 5,805,096 shares — an estimated $14.3M sold.

BlackRock first reported a position in SLRN in Q2 2023 and held it in 8 quarters. The position peaked at $32.4M in Q1 2024. 2 funds tracked by Wall St. Rank hold SLRN as of Q2 2025.

  • BlackRock reported no remaining ACELYRIN position as of Q2 2025 after selling out during the quarter.
  • BlackRock sold 5,805,096 ACELYRIN shares in Q2 2025, an estimated $14.3M.
  • BlackRock first reported a position in ACELYRIN in Q2 2023 and held it in 8 quarters.
  • BlackRock's ACELYRIN position peaked at $32.4M in Q1 2024.
  • 2 funds tracked by Wall St. Rank held ACELYRIN as of Q2 2025.

Based on BlackRock's 13F filing for Q2 2025, filed 12 Aug 2025.