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Magnetar Financial’s Boston Scientific BSX Stock Holding History

Magnetar Financial’s Portfolio BSX Stock Details BSX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2022
Q4 		– Sell
-105,400
Closed -$140K – 798
2022
Q3 		$140K Buy
+105,400
New +$4.23M ﹤0.01% 930
2022
Q1 		– Sell
-105,400
Closed -$189K – 1347
2021
Q4 		$189K Buy
+105,400
New +$4.43M ﹤0.01% 1162

Other funds holding BSX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Magnetar Financial's BSX Position: Q2 2026 in Review

Magnetar Financial sold out of Boston Scientific (BSX) in Q2 2026, closing a stake of 7,883 shares — an estimated $496K sold.

Magnetar Financial first reported a position in BSX in Q3 2016 and held it in 32 quarters. The position peaked at $98.1M in Q2 2022. 1,477 funds tracked by Wall St. Rank hold BSX as of Q2 2026.

  • Magnetar Financial reported no remaining Boston Scientific position as of Q2 2026 after selling out during the quarter.
  • Magnetar Financial sold 7,883 Boston Scientific shares in Q2 2026, an estimated $496K.
  • Magnetar Financial first reported a position in Boston Scientific in Q3 2016 and held it in 32 quarters.
  • Magnetar Financial's Boston Scientific position peaked at $98.1M in Q2 2022.
  • 1,477 funds tracked by Wall St. Rank held Boston Scientific as of Q2 2026.

Based on Magnetar Financial's 13F filing for Q2 2026, filed 14 Aug 2026.