Hudson Bay Capital Management
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Hudson Bay Capital Management’s Boston Scientific BSX Stock Holding History

Hudson Bay Capital Management’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
2025
Q3 		– Sell
-66,100
Closed -$7.1M – 1274
2025
Q2 		$7.1M Buy
66,100
+60,200
+1,020% +$6.09M 0.02% 449
2025
Q1 		$595K Buy
+5,900
New +$594K ﹤0.01% 1010

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

Hudson Bay Capital Management's BSX Position: Q2 2026 in Review

Hudson Bay Capital Management increased its Boston Scientific (BSX) stake by 53% in Q2 2026, buying an estimated $14.1M and bringing the position to 742,896 shares worth $31.7M. The position accounts for 0.09% of the portfolio, ranked #168.

Hudson Bay Capital Management first reported a position in BSX in Q1 2015 and has held it in 9 quarters since. The position peaked at $52M in Q2 2025. 1,479 funds tracked by Wall St. Rank hold BSX as of Q2 2026.

  • Hudson Bay Capital Management held 742,896 shares of Boston Scientific worth $31.7M as of Q2 2026.
  • Hudson Bay Capital Management bought 258,896 Boston Scientific shares in Q2 2026, an estimated $14.1M.
  • Boston Scientific made up 0.09% of Hudson Bay Capital Management's portfolio in Q2 2026, its #168 holding.
  • Hudson Bay Capital Management first reported a position in Boston Scientific in Q1 2015 and has held it in 9 quarters since.
  • Hudson Bay Capital Management's Boston Scientific position peaked at $52M in Q2 2025.
  • 1,479 funds tracked by Wall St. Rank held Boston Scientific as of Q2 2026.

Based on Hudson Bay Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.