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Boston Scientific BSX

US equityMarket cap rank #253Medical DevicesBrain-Computer Interface
$44.77
+$0.15 (+0.33%)
Market open · Sep 24, 2:00 pm ET
After hours $44.60 -0.04%
Open$44.65
Prev close$44.62
Day range$44.47 – $45.16
Volume6.26M
Market cap$64.87B
P/E (TTM)18.1
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership94.0%-0.14 pts vs. prior quarter
Institutions holding1,861-8 vs. prior quarter
Insider trades (recent)14 buys / 4 sellsNet buying
Short interest3.32% of floatDays to cover 2.3 · as of 31 Aug 2026
Short-sale volume share14.1%5-day average of daily volume

Short-sale volume as % of daily volume

9%13%17%22%Aug '26Sep '26Sep '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$265.53M (6 inflow days, 14 outflow days).

Largest holders

  • BlackRock8.95%
  • Vanguard Capital Management, LLC7.28%
  • State Street Global Advisors4.84%
  • PRIMECAP Management Company3.49%
  • FMR2.73%

By investor type

  • Mutual Fund72.92%
  • Hedge Fund8.58%
  • Public Company3.52%
  • Government Pension Fund3.03%
  • Private Company2.89%
  • Sovereign Wealth Fund1.54%
  • VC/PE Fund0.57%
  • Corporate Pension Plan0.35%
Institutional holders1,861
Institutional ownership94.0%

Insider activity

Total transactions24
Bought14
Sold4

Short interest

Report dateShares short% of floatDays to cover
31 Aug 2026 48,173,758 3.3% 2.3
14 Aug 2026 27,617,554 1.9% 1.6
31 Jul 2026 22,276,201 1.5% 1.0
15 Jul 2026 28,281,040 1.9% 1.7
30 Jun 2026 27,938,624 1.9% 1.2
15 Jun 2026 29,750,309 2.0% 1.4
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