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Magnetar Financial’s Impinj PI Stock Holding History

Magnetar Financial’s Portfolio PI Stock Details PI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-1,974
Closed -$357K – 1161
2025
Q3 		$357K Buy
+1,974
New +$311K ﹤0.01% 669
2025
Q1 		– Sell
-8,564
Closed -$1.24M – 896
2024
Q4 		$1.24M Buy
+8,564
New +$1.62M 0.03% 258
2017
Q2 		– Sell
-9,023
Closed -$273K – 926
2017
Q1 		$273K Buy
+9,023
New +$284K ﹤0.01% 595

Other funds holding PI

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 Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
SC
Sylebra Capital Palo Alto, California $945M AUM 22.34% 1-Year Est. Return
WRCM
Whale Rock Capital Management Boston, Massachusetts $12.5B AUM 306.52% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

Magnetar Financial's PI Position: Q4 2025 in Review

Magnetar Financial sold out of Impinj (PI) in Q4 2025, closing a stake of 1,974 shares — an estimated $357K sold.

Magnetar Financial first reported a position in PI in Q1 2017 and held it in 3 quarters. The position peaked at $1.24M in Q4 2024. 328 funds tracked by Wall St. Rank hold PI as of Q4 2025.

  • Magnetar Financial reported no remaining Impinj position as of Q4 2025 after selling out during the quarter.
  • Magnetar Financial sold 1,974 Impinj shares in Q4 2025, an estimated $357K.
  • Magnetar Financial first reported a position in Impinj in Q1 2017 and held it in 3 quarters.
  • Magnetar Financial's Impinj position peaked at $1.24M in Q4 2024.
  • 328 funds tracked by Wall St. Rank held Impinj as of Q4 2025.

Based on Magnetar Financial's 13F filing for Q4 2025, filed 17 Feb 2026.