13 institutions reported holding $781.5M of BOSTON SCIENTIFIC CORP (BSX-PA) in SEC 13F filings for 2026-06-30. Largest institutional holders: 1832 Asset Management L.P. ($448.1M), JPMORGAN CHASE & CO ($183.7M), IMC-Chicago, LLC ($58.5M), SIMPLEX TRADING, LLC ($52.5M), GROUP ONE TRADING LLC ($28.4M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | 1832 Asset Management L.P. | $448.1M | 10.5M | New |
| 2 | JPMORGAN CHASE & CO | $183.7M | 4.2M | Added |
| 3 | IMC-Chicago, LLC | $58.5M | 1.4M | Trimmed |
| 4 | SIMPLEX TRADING, LLC | $52.5M | 1.2M | Added |
| 5 | GROUP ONE TRADING LLC | $28.4M | 666,000 | Trimmed |
| 6 | Sender Co & Partners, Inc. | $3.8M | 90,000 | New |
| 7 | HRT FINANCIAL LP | $3.3M | 78,500 | Trimmed |
| 8 | SG Americas Securities, LLC | $2.2M | 711,700 | New |
| 9 | Fortis Capital Management LLC | $853,600 | 0 | New |
| 10 | NATIONAL BANK OF CANADA /FI/ | $51,429 | 15 | New |
| 11 | Carmignac Gestion | $0 | 0 | New |
| 12 | Phoenix Financial Ltd. | $0 | 0 | Exited |
| 13 | SUMMIT SECURITIES GROUP LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30