Parnassus Investments
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Parnassus Investments’s Boston Scientific BSX Stock Holding History

Parnassus Investments’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 		$502M Buy
8,003,820
+104,580
+1% +$8.37M 1.47% 29
2025
Q4 		$753M Buy
7,899,240
+1,014,800
+15% +$99.5M 1.95% 20
2025
Q3 		$672M Buy
6,884,440
+6,868,459
+42,979% +$711M 1.55% 26
2025
Q2 		$1.72M Buy
15,981
+917
+6% +$92.8K ﹤0.01% 130
2025
Q1 		$1.52M Buy
15,064
+203
+1% +$20.4K ﹤0.01% 128
2024
Q4 		$1.33M Buy
14,861
+97
+0.7% +$8.54K ﹤0.01% 118
2024
Q3 		$1.24M Buy
14,764
+1,284
+10% +$101K ﹤0.01% 117
2024
Q2 		$1.04M Buy
13,480
+2,021
+18% +$148K ﹤0.01% 120
2024
Q1 		$785K Buy
11,459
+1,748
+18% +$112K ﹤0.01% 128
2023
Q4 		$561K Buy
9,711
+2,038
+27% +$109K ﹤0.01% 122
2023
Q3 		$405K Buy
7,673
+244
+3% +$12.8K ﹤0.01% 129
2023
Q2 		$402K Sell
7,429
-644
-8% -$33.6K ﹤0.01% 123
2023
Q1 		$404K Buy
8,073
+2,916
+57% +$137K ﹤0.01% 121
2022
Q4 		$239K Buy
+5,157
New +$223K ﹤0.01% 131
2022
Q3 		– Sell
-15,691,959
Closed -$585M – 130
2022
Q2 		$585M Sell
15,691,959
-42,791
-0.3% -$1.74M 1.4% 27
2022
Q1 		$697M Buy
15,734,750
+194,219
+1% +$8.42M 1.41% 27
2021
Q4 		$660M Sell
15,540,531
-136,426
-0.9% -$5.73M 1.27% 31
2021
Q3 		$680M Buy
15,676,957
+564,197
+4% +$25M 1.43% 30
2021
Q2 		$646M Buy
15,112,760
+6,259,424
+71% +$263M 1.41% 29
2021
Q1 		$342M Buy
+8,853,336
New +$335M 0.83% 38

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

Parnassus Investments's BSX Position: Q1 2026 in Review

Parnassus Investments increased its Boston Scientific (BSX) stake by 1.3% in Q1 2026, buying an estimated $8.37M and bringing the position to 8,003,820 shares worth $502M. The position accounts for 1.47% of the portfolio, ranked #29.

Parnassus Investments first reported a position in BSX in Q1 2021 and has held it in 20 quarters since. The position peaked at $753M in Q4 2025. 1,664 funds tracked by Wall St. Rank hold BSX as of Q1 2026.

  • Parnassus Investments held 8,003,820 shares of Boston Scientific worth $502M as of Q1 2026.
  • Parnassus Investments bought 104,580 Boston Scientific shares in Q1 2026, an estimated $8.37M.
  • Boston Scientific made up 1.47% of Parnassus Investments's portfolio in Q1 2026, its #29 holding.
  • Parnassus Investments first reported a position in Boston Scientific in Q1 2021 and has held it in 20 quarters since.
  • Parnassus Investments's Boston Scientific position peaked at $753M in Q4 2025.
  • 1,664 funds tracked by Wall St. Rank held Boston Scientific as of Q1 2026.

Based on Parnassus Investments's 13F filing for Q1 2026, filed 12 May 2026.