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Prosight Management’s Boston Scientific BSX Stock Holding History

Prosight 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
2026
Q1 		$49.9M Buy
795,547
+585,547
+279% +$46.8M 8.19% 2
2025
Q4 		$20M Buy
210,000
+133,900
+176% +$13.1M 4.14% 10
2025
Q3 		$7.43M Buy
+76,100
New +$7.88M 1.73% 22

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

Prosight Management's BSX Position: Q1 2026 in Review

Prosight Management increased its Boston Scientific (BSX) stake by 279% in Q1 2026, buying an estimated $46.8M and bringing the position to 795,547 shares worth $49.9M. The position accounts for 8.19% of the portfolio, ranked #2.

Prosight Management first reported a position in BSX in Q3 2025 and has held it in 3 quarters since. 1,664 funds tracked by Wall St. Rank hold BSX as of Q1 2026.

  • Prosight Management held 795,547 shares of Boston Scientific worth $49.9M as of Q1 2026.
  • Prosight Management bought 585,547 Boston Scientific shares in Q1 2026, an estimated $46.8M.
  • Boston Scientific made up 8.19% of Prosight Management's portfolio in Q1 2026, its #2 holding.
  • Prosight Management first reported a position in Boston Scientific in Q3 2025 and has held it in 3 quarters since.
  • 1,664 funds tracked by Wall St. Rank held Boston Scientific as of Q1 2026.

Based on Prosight Management's 13F filing for Q1 2026, filed 15 May 2026.