William Blair & Company
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William Blair & Company’s Astera Labs ALAB Stock Holding History

William Blair & Company’s Portfolio ALAB Stock Details ALAB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$8.28M Buy
17,145
+775
+5% +$206K 0.02% 409
2026
Q1 		$1.79M Buy
16,370
+1,323
+9% +$188K 0.01% 762
2025
Q4 		$2.5M Buy
15,047
+4,860
+48% +$813K 0.01% 691
2025
Q3 		$1.99M Sell
10,187
-2,788
-21% -$458K 0.01% 731
2025
Q2 		$1.17M Buy
12,975
+4,350
+50% +$344K ﹤0.01% 846
2025
Q1 		$515K Buy
+8,625
New +$798K ﹤0.01% 1078

Other funds holding ALAB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
VanEck Associates
VanEck Associates New York $164B AUM 112.45% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

William Blair & Company's ALAB Position: Q2 2026 in Review

William Blair & Company increased its Astera Labs (ALAB) stake by 4.7% in Q2 2026, buying an estimated $206K and bringing the position to 17,145 shares worth $8.28M. The position accounts for 0.02% of the portfolio, ranked #409.

William Blair & Company first reported a position in ALAB in Q1 2025 and has held it in 6 quarters since. 988 funds tracked by Wall St. Rank hold ALAB as of Q2 2026.

  • William Blair & Company held 17,145 shares of Astera Labs worth $8.28M as of Q2 2026.
  • William Blair & Company bought 775 Astera Labs shares in Q2 2026, an estimated $206K.
  • Astera Labs made up 0.02% of William Blair & Company's portfolio in Q2 2026, its #409 holding.
  • William Blair & Company first reported a position in Astera Labs in Q1 2025 and has held it in 6 quarters since.
  • 988 funds tracked by Wall St. Rank held Astera Labs as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.