Parallax Volatility Advisers
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Parallax Volatility Advisers’s Boston Scientific BSX Stock Holding History

Parallax Volatility Advisers’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
-261,500
Closed -$24.9M – 1493
2025
Q4 		$24.9M Buy
+261,500
New +$25.6M 0.05% 256
2025
Q1 		– Sell
-52,700
Closed -$4.71M – 1616
2024
Q4 		$4.71M Hold
52,700
– – 0.01% 845
2024
Q3 		$4.42M Buy
52,700
+42,800
+432% +$3.37M 0.01% 845
2024
Q2 		$762K Buy
9,900
+1,100
+13% +$80.5K ﹤0.01% 1333
2024
Q1 		$603K Sell
8,800
-274,600
-97% -$17.7M ﹤0.01% 1353
2023
Q4 		$16.4M Buy
283,400
+59,800
+27% +$3.19M 0.03% 447
2023
Q3 		$11.8M Buy
223,600
+29,300
+15% +$1.54M 0.03% 491
2023
Q2 		$10.5M Sell
194,300
-7,900
-4% -$413K 0.02% 517
2023
Q1 		$10.1M Sell
202,200
-62,800
-24% -$2.96M 0.02% 582
2022
Q4 		$12.3M Buy
265,000
+110,500
+72% +$4.78M 0.02% 707
2022
Q3 		$5.98M Buy
154,500
+74,700
+94% +$3M 0.01% 941
2022
Q2 		$2.97M Sell
79,800
-34,500
-30% -$1.4M ﹤0.01% 1186
2022
Q1 		$5.06M Buy
+114,300
New +$4.95M ﹤0.01% 981
2020
Q4 		– Sell
-1,059,900
Closed -$40.5M – 2491
2020
Q3 		$40.5M Sell
1,059,900
-55,500
-5% -$2.14M 0.03% 465
2020
Q2 		$39.2M Buy
1,115,400
+292,200
+35% +$10.5M 0.05% 320
2020
Q1 		$26.9M Buy
823,200
+730,600
+789% +$28.5M 0.03% 340
2019
Q4 		$4.19M Sell
92,600
-32,800
-26% -$1.37M ﹤0.01% 970
2019
Q3 		$5.1M Sell
125,400
-89,400
-42% -$3.79M 0.01% 807
2019
Q2 		$9.23M Buy
214,800
+144,400
+205% +$5.55M 0.01% 542
2019
Q1 		$2.71M Buy
70,400
+200
+0.3% +$7.64K ﹤0.01% 895
2018
Q4 		$2.48M Buy
70,200
+54,400
+344% +$1.97M ﹤0.01% 974
2018
Q3 		$608K Buy
+15,800
New +$552K ﹤0.01% 1392
2017
Q1 		– Sell
-22,600
Closed -$489K – 3579
2016
Q4 		$489K Buy
+22,600
New +$493K ﹤0.01% 1516
2015
Q2 		– Sell
-24,600
Closed -$437K – 3645
2015
Q1 		$437K Sell
24,600
-540,000
-96% -$8.53M ﹤0.01% 1621
2014
Q4 		$7.48M Buy
+564,600
New +$7.22M 0.02% 559

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

Parallax Volatility Advisers's BSX Position: Q1 2026 in Review

Parallax Volatility Advisers reduced its Boston Scientific (BSX) stake by 98% in Q1 2026, selling an estimated $6.46M and leaving 1,389 shares worth $82.7K. The position accounts for ﹤0.01% of the portfolio, ranked #1249.

Parallax Volatility Advisers first reported a position in BSX in Q4 2014 and has held it in 27 quarters since. The position peaked at $19.2M in Q1 2020. 1,666 funds tracked by Wall St. Rank hold BSX as of Q1 2026.

  • Parallax Volatility Advisers held 1,389 shares of Boston Scientific worth $82.7K as of Q1 2026.
  • Parallax Volatility Advisers sold 80,743 Boston Scientific shares in Q1 2026, an estimated $6.46M.
  • Boston Scientific made up ﹤0.01% of Parallax Volatility Advisers's portfolio in Q1 2026, its #1249 holding.
  • Parallax Volatility Advisers first reported a position in Boston Scientific in Q4 2014 and has held it in 27 quarters since.
  • Parallax Volatility Advisers's Boston Scientific position peaked at $19.2M in Q1 2020.
  • 1,666 funds tracked by Wall St. Rank held Boston Scientific as of Q1 2026.

Based on Parallax Volatility Advisers's 13F filing for Q1 2026, filed 15 May 2026.