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Zweig-DiMenna Associates’s Boston Scientific BSX Stock Holding History

Zweig-DiMenna Associates’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 		– Sell
-135,600
Closed -$12.9M – 68
2025
Q4 		$12.9M Sell
135,600
-18,850
-12% -$1.85M 0.8% 40
2025
Q3 		$15.1M Sell
154,450
-1,250
-0.8% -$129K 1.06% 29
2025
Q2 		$16.7M Buy
155,700
+32,700
+27% +$3.31M 1.58% 18
2025
Q1 		$12.4M Sell
123,000
-159,900
-57% -$16.1M 1.97% 16
2024
Q4 		$25.3M Buy
282,900
+11,900
+4% +$1.05M 1.89% 12
2024
Q3 		$22.7M Buy
271,000
+80,500
+42% +$6.35M 2.29% 11
2024
Q2 		$14.7M Buy
+190,500
New +$13.9M 1.65% 23
2013
Q4 		– Sell
-44,015
Closed -$517K – 259
2013
Q3 		$517K Buy
+44,015
New +$476K 0.02% 156

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
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 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
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

Zweig-DiMenna Associates's BSX Position: Q1 2026 in Review

Zweig-DiMenna Associates sold out of Boston Scientific (BSX) in Q1 2026, closing a stake of 135,600 shares — an estimated $12.9M sold.

Zweig-DiMenna Associates first reported a position in BSX in Q3 2013 and held it in 8 quarters. The position peaked at $25.3M in Q4 2024. 1,678 funds tracked by Wall St. Rank hold BSX as of Q1 2026.

  • Zweig-DiMenna Associates reported no remaining Boston Scientific position as of Q1 2026 after selling out during the quarter.
  • Zweig-DiMenna Associates sold 135,600 Boston Scientific shares in Q1 2026, an estimated $12.9M.
  • Zweig-DiMenna Associates first reported a position in Boston Scientific in Q3 2013 and held it in 8 quarters.
  • Zweig-DiMenna Associates's Boston Scientific position peaked at $25.3M in Q4 2024.
  • 1,678 funds tracked by Wall St. Rank held Boston Scientific as of Q1 2026.

Based on Zweig-DiMenna Associates's 13F filing for Q1 2026, filed 5 May 2026.