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Aaron Cowen’s Boston Scientific BSX Stock Holding History

Aaron Cowen’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
Q2 		$5.98M Buy
140,083
+16,142
+13% +$877K 0.11% 63
2026
Q1 		$7.78M Sell
123,941
-229,620
-65% -$18.4M 0.2% 50
2025
Q4 		$33.7M Hold
353,561
– – 0.69% 45
2025
Q3 		$34.5M Hold
353,561
– – 0.88% 37
2025
Q2 		$38M Buy
353,561
+91,462
+35% +$9.25M 1.14% 32
2025
Q1 		$26.4M Sell
262,099
-135,580
-34% -$13.7M 0.98% 32
2024
Q4 		$35.5M Buy
397,679
+145,990
+58% +$12.9M 1.21% 30
2024
Q3 		$21.1M Hold
251,689
– – 0.67% 46
2024
Q2 		$19.4M Sell
251,689
-51,346
-17% -$3.76M 0.71% 40
2024
Q1 		$20.8M Sell
303,035
-391,066
-56% -$25.1M 0.77% 40
2023
Q4 		$40.1M Buy
694,101
+340,360
+96% +$18.2M 1.81% 19
2023
Q3 		$18.7M Buy
353,741
+335,500
+1,839% +$17.6M 1.01% 32
2023
Q2 		$987K Hold
18,241
– – 0.05% 87
2023
Q1 		$913K Buy
18,241
+4,100
+29% +$193K 0.04% 82
2022
Q4 		$654K Buy
+14,141
New +$612K 0.03% 72
2020
Q3 		– Sell
-455,000
Closed -$16M – 98
2020
Q2 		$16M Sell
455,000
-4,089,220
-90% -$147M 0.34% 48
2020
Q1 		$148M Buy
4,544,220
+2,868,710
+171% +$112M 4% 8
2019
Q4 		$75.8M Sell
1,675,510
-43,889
-3% -$1.84M 1.72% 28
2019
Q3 		$70M Sell
1,719,399
-949,001
-36% -$40.2M 1.81% 23
2019
Q2 		$115M Sell
2,668,400
-409,000
-13% -$15.7M 2.43% 15
2019
Q1 		$118M Buy
3,077,400
+778,946
+34% +$29.8M 3.42% 8
2018
Q4 		$81.2M Sell
2,298,454
-79,016
-3% -$2.87M 4.84% 8
2018
Q3 		$91.5M Buy
+2,377,470
New +$83M 2.11% 16

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

Aaron Cowen's BSX Position: Q2 2026 in Review

Aaron Cowen increased its Boston Scientific (BSX) stake by 13% in Q2 2026, buying an estimated $877K and bringing the position to 140,083 shares worth $5.98M. The position accounts for 0.11% of the portfolio, ranked #63.

Aaron Cowen first reported a position in BSX in Q3 2018 and has held it in 23 quarters since. The position peaked at $148M in Q1 2020. 1,468 funds tracked by Wall St. Rank hold BSX as of Q2 2026.

  • Aaron Cowen held 140,083 shares of Boston Scientific worth $5.98M as of Q2 2026.
  • Aaron Cowen bought 16,142 Boston Scientific shares in Q2 2026, an estimated $877K.
  • Boston Scientific made up 0.11% of Aaron Cowen's portfolio in Q2 2026, its #63 holding.
  • Aaron Cowen first reported a position in Boston Scientific in Q3 2018 and has held it in 23 quarters since.
  • Aaron Cowen's Boston Scientific position peaked at $148M in Q1 2020.
  • 1,468 funds tracked by Wall St. Rank held Boston Scientific as of Q2 2026.

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