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Magnetar Financial’s Astera Labs ALAB Stock Holding History

Magnetar Financial’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
Q1 		– Sell
-9,053
Closed -$1.51M – 1443
2025
Q4 		$1.51M Sell
9,053
-19,453
-68% -$3.25M 0.01% 385
2025
Q3 		$5.58M Buy
28,506
+14,681
+106% +$2.41M 0.03% 216
2025
Q2 		$1.25M Buy
+13,825
New +$1.09M 0.01% 399
2024
Q3 		– Sell
-20,305
Closed -$1.23M – 728
2024
Q2 		$1.23M Buy
+20,305
New +$1.41M 0.03% 244

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
AllianceBernstein
AllianceBernstein Nashville, Tennessee $302B AUM 26.44% 1-Year Est. Return
AM
Atreides Management Boston, Massachusetts $14.3B AUM 116.01% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
FAM
Fred Alger Management New York $30B AUM 76.99% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Amundi
Amundi Paris, France $416B AUM 44.19% 1-Year Est. Return

Magnetar Financial's ALAB Position: Q1 2026 in Review

Magnetar Financial sold out of Astera Labs (ALAB) in Q1 2026, closing a stake of 9,053 shares — an estimated $1.51M sold.

Magnetar Financial first reported a position in ALAB in Q2 2024 and held it in 4 quarters. The position peaked at $5.58M in Q3 2025. 708 funds tracked by Wall St. Rank hold ALAB as of Q1 2026.

  • Magnetar Financial reported no remaining Astera Labs position as of Q1 2026 after selling out during the quarter.
  • Magnetar Financial sold 9,053 Astera Labs shares in Q1 2026, an estimated $1.51M.
  • Magnetar Financial first reported a position in Astera Labs in Q2 2024 and held it in 4 quarters.
  • Magnetar Financial's Astera Labs position peaked at $5.58M in Q3 2025.
  • 708 funds tracked by Wall St. Rank held Astera Labs as of Q1 2026.

Based on Magnetar Financial's 13F filing for Q1 2026, filed 13 May 2026.