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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 $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

Magnetar Financial's BSX Position: Q1 2026 in Review

Magnetar Financial reduced its Boston Scientific (BSX) stake by 33% in Q1 2026, selling an estimated $317K and leaving 7,883 shares worth $496K. The position accounts for 0.01% of the portfolio, ranked #634.

Magnetar Financial first reported a position in BSX in Q3 2016 and has held it in 32 quarters since. The position peaked at $98M in Q3 2022. 1,664 funds tracked by Wall St. Rank hold BSX as of Q1 2026.

  • Magnetar Financial held 7,883 shares of Boston Scientific worth $496K as of Q1 2026.
  • Magnetar Financial sold 3,958 Boston Scientific shares in Q1 2026, an estimated $317K.
  • Boston Scientific made up 0.01% of Magnetar Financial's portfolio in Q1 2026, its #634 holding.
  • Magnetar Financial first reported a position in Boston Scientific in Q3 2016 and has held it in 32 quarters since.
  • Magnetar Financial's Boston Scientific position peaked at $98M in Q3 2022.
  • 1,664 funds tracked by Wall St. Rank held Boston Scientific as of Q1 2026.

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