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Main Street Research’s Boston Scientific BSX Stock Holding History

Main Street Research’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 		– Sell
-5,993
Closed -$376K – 144
2026
Q1 		$376K Sell
5,993
-30
-0.5% -$2.4K 0.02% 100
2025
Q4 		$574K Sell
6,023
-423
-7% -$41.5K 0.03% 71
2025
Q3 		$629K Sell
6,446
-374,847
-98% -$38.8M 0.03% 72
2025
Q2 		$41M Buy
381,293
+8,518
+2% +$862K 2.55% 20
2025
Q1 		$37.6M Buy
372,775
+365,180
+4,808% +$36.8M 2.46% 19
2024
Q4 		$678K Sell
7,595
-142
-2% -$12.5K 0.04% 66
2024
Q3 		$648K Buy
7,737
+161
+2% +$12.7K 0.04% 66
2024
Q2 		$583K Buy
7,576
+170
+2% +$12.4K 0.04% 63
2024
Q1 		$507K Sell
7,406
-1,362
-16% -$87.6K 0.03% 67
2023
Q4 		$507K Hold
8,768
– – 0.04% 65
2023
Q3 		$463K Hold
8,768
– – 0.05% 68
2023
Q2 		$474K Sell
8,768
-1,676
-16% -$87.5K 0.08% 63
2023
Q1 		$523K Buy
+10,444
New +$492K 0.1% 53
2020
Q1 		– Sell
-347,134
Closed -$15.7M – 83
2019
Q4 		$15.7M Sell
347,134
-5,344
-2% -$224K 2.48% 16
2019
Q3 		$14.3M Sell
352,478
-978
-0.3% -$41.4K 2.69% 16
2019
Q2 		$15.2M Buy
353,456
+337,656
+2,137% +$13M 3.42% 9
2019
Q1 		$606K Buy
+15,800
New +$603K 0.19% 44

Other funds holding BSX

Assenagon Asset Management
Assenagon Asset Management Senningerberg, Luxembourg $80.2B AUM 50.57% 1-Year Est. Return
Ninety One (UK)
Ninety One (UK) London, United Kingdom $44.7B AUM 17.24% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
ATO
Alecta Tjanstepension Omsesidigt Stockholm, Sweden $23.8B AUM 34.25% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return
RG
Rathbones Group Liverpool, United Kingdom $27.1B AUM 20.2% 1-Year Est. Return
Pictet Asset Management
Pictet Asset Management Carouge, Switzerland $105B AUM 38.07% 1-Year Est. Return
MF
Milford Funds Auckland $6.14B AUM
New York State Common Retirement Fund
New York State Common Retirement Fund Albany, New York $79.3B AUM 43.63% 1-Year Est. Return
BT
Banque Transatlantique Paris, France $4.66B AUM 33.26% 1-Year Est. Return

Main Street Research's BSX Position: Q2 2026 in Review

Main Street Research sold out of Boston Scientific (BSX) in Q2 2026, closing a stake of 5,993 shares — an estimated $376K sold.

Main Street Research first reported a position in BSX in Q1 2019 and held it in 17 quarters. The position peaked at $41M in Q2 2025. 533 funds tracked by Wall St. Rank hold BSX as of Q2 2026.

  • Main Street Research reported no remaining Boston Scientific position as of Q2 2026 after selling out during the quarter.
  • Main Street Research sold 5,993 Boston Scientific shares in Q2 2026, an estimated $376K.
  • Main Street Research first reported a position in Boston Scientific in Q1 2019 and held it in 17 quarters.
  • Main Street Research's Boston Scientific position peaked at $41M in Q2 2025.
  • 533 funds tracked by Wall St. Rank held Boston Scientific as of Q2 2026.

Based on Main Street Research's 13F filing for Q2 2026, filed 29 Jul 2026.