BSX Boston Scientific Corporation
Boston Scientific Corporation (BSX) Institutional Ownership
What the institutions did with BSX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 129.7M | 9.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 97.1M | 6.8% |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 96.9M | 6.8% |
| STATE STREET CORP | 70.1M | 4.9% |
| PRIMECAP MANAGEMENT CO/CA/ | 50.5M | 3.5% |
| FMR LLC | 45.7M | 3.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 33.4M | 2.3% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 29.8M | 2.1% |
| D. E. Shaw & Co., Inc. | 25.5M | 1.8% |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 24.9M | 1.7% |
| JPMORGAN CHASE & CO | 23.9M | 1.7% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 23.3M | 1.6% |
| NORGES BANK | 21.2M | 1.5% |
| TWO SIGMA INVESTMENTS, LP | 19.4M | 1.4% |
| MORGAN STANLEY | 18.9M | 1.3% |
| Jupiter Topco LLC | 18.8M | 1.3% |
| Bollard Group LLC | 18.4M | 1.3% |
| GOLDMAN SACHS GROUP INC | 17.0M | 1.2% |
| Capital World Investors | 16.8M | 1.2% |
| UBS Group AG | 16.4M | 1.1% |
| WELLINGTON MANAGEMENT GROUP LLP | 15.3M | 1.1% |
| Amundi | 14.3M | 1.0% |
| Capital Research Global Investors | 14.2M | 1.0% |
| Invesco Ltd. | 13.8M | 1.0% |
| FRANKLIN RESOURCES INC | 13.8M | 1.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | Increased | 2.3M | 96.9M | +94.6M |
| FMR LLC | Reduced | 74.2M | 45.7M | -28.5M |
| PRIMECAP MANAGEMENT CO/CA/ | Increased | 32.5M | 50.5M | +18.0M |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Increased | 11.0M | 24.9M | +13.9M |
| TWO SIGMA INVESTMENTS, LP | Increased | 9.4M | 19.4M | +9.9M |
| BANK OF AMERICA CORP /DE/ | Reduced | 22.8M | 13.0M | -9.7M |
| JPMORGAN CHASE & CO | Reduced | 33.4M | 23.9M | -9.4M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 13.9M | 23.3M | +9.4M |
| FIL Ltd | Increased | 3.2M | 12.3M | +9.1M |
| JANE STREET GROUP, LLC | Increased | 4.0M | 12.1M | +8.1M |
| EDGEWOOD MANAGEMENT LLC | Sold Out | 7.6M | 0 | -7.6M |
| Capital Research Global Investors | Increased | 7.1M | 14.2M | +7.1M |
| PARNASSUS INVESTMENTS, LLC | Reduced | 8.0M | 1.2M | -6.8M |
| NEUBERGER BERMAN GROUP LLC | Reduced | 7.1M | 2.1M | -4.9M |
| Invesco Ltd. | Increased | 9.1M | 13.8M | +4.7M |
| AQR CAPITAL MANAGEMENT LLC | Increased | 5.2M | 9.7M | +4.4M |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | Reduced | 13.2M | 9.2M | -4.0M |
| Rathbones Group PLC | Reduced | 6.4M | 2.5M | -3.8M |
| Ninety One UK Ltd | Reduced | 7.3M | 3.5M | -3.8M |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 18.8M | 15.3M | -3.5M |
| Qube Research & Technologies Ltd | Increased | 5.6M | 8.9M | +3.4M |
| Point72 Asset Management, L.P. | Reduced | 3.7M | 365.2K | -3.3M |
| MORGAN STANLEY | Reduced | 22.3M | 18.9M | -3.3M |
| FIRST MANHATTAN CO. LLC. | Reduced | 4.9M | 1.7M | -3.2M |
| Vontobel Holding Ltd. | Reduced | 8.0M | 4.9M | -3.1M |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.