Who owns BSX
Institutions that file 13Fs hold 92% of the shares
Shares they hold, quarter on quarter
-0.7%
147 new, 571 added, 601 cut, 352 sold out
Top 10 holders
40%
of the shares institutions hold
A 13F lists the long positions of managers with more than $100M in US stocks. It shows the last day of a quarter and is filed up to 45 days later. Two managers can report the same shares, so totals can count some shares twice.
Institutional owners
The 25 biggest holders
| Holder | Shares | Value | % of company | From Mar 31, 2026 |
|---|---|---|---|---|
| BlackRock, Inc. | 129.68M | $5.5B | 8.95% | Reduced -1.6% |
| VANGUARD CAPITAL MANAGEMENT LLC | 97.09M | $4.1B | 6.70% | Added +0.7% |
| STATE STREET CORP | 70.11M | $3.0B | 4.84% | Added +3.1% |
| PRIMECAP MANAGEMENT CO/CA/ | 50.52M | $2.2B | 3.49% | Added +55.3% |
| FMR LLC | 45.70M | $2.0B | 3.15% | Reduced -38.4% |
| GEODE CAPITAL MANAGEMENT, LLC | 33.44M | $1.4B | 2.31% | Held |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 29.79M | $1.3B | 2.06% | Held |
| D. E. Shaw & Co., Inc. | 25.46M | $1.1B | 1.76% | Added +4.7% |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 24.86M | $1.5B | 1.72% | Added +126.1% |
| JPMORGAN CHASE & CO | 23.91M | $1.0B | 1.65% | Reduced -28.3% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 23.29M | $994.2M | 1.61% | Added +67.7% |
| NORGES BANK | 21.17M | $903.5M | 1.46% | New |
| TWO SIGMA INVESTMENTS, LP | 19.36M | $826.2M | 1.34% | Added +105.7% |
| MORGAN STANLEY | 18.95M | $808.7M | 1.31% | Reduced -14.9% |
| Jupiter Topco LLC | 18.82M | $803.4M | 1.30% | New |
| Bollard Group LLC | 18.42M | $786K | 1.27% | Reduced -0.6% |
| GOLDMAN SACHS GROUP INC | 16.95M | $723.6M | 1.17% | Reduced -10.3% |
| Capital World Investors | 16.81M | $717.6M | 1.16% | Added +9.8% |
| UBS Group AG | 16.35M | $697.9M | 1.13% | Added +10.3% |
| WELLINGTON MANAGEMENT GROUP LLP | 15.30M | $653.1M | 1.06% | Reduced -18.8% |
| Amundi | 14.30M | $610.2M | 0.99% | Added +1.2% |
| Capital Research Global Investors | 14.18M | $605.3M | 0.98% | Added +100.3% |
| Invesco Ltd. | 13.80M | $589.0M | 0.95% | Added +52.5% |
| FRANKLIN RESOURCES INC | 13.77M | $587.8M | 0.95% | Reduced -5.0% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 13.09M | $558.7M | 0.90% | Reduced -3.1% |
Show the other 15 holders
This quarter
Who bought and who sold the most shares
Bought the most shares
- NORGES BANK +21.17M, new
- Jupiter Topco LLC +18.82M, new
- PRIMECAP MANAGEMENT CO/CA/ +17.99M
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/ +13.86M
- TWO SIGMA INVESTMENTS, LP +9.95M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP +9.40M
- FIL Ltd +9.12M
- JANE STREET GROUP, LLC +8.06M
- Capital Research Global Investors +7.10M
- Invesco Ltd. +4.75M
Sold the most shares
- FMR LLC -28.52M
- JANUS HENDERSON GROUP PLC -16.50M, sold out
- BANK OF AMERICA CORP /DE/ -9.73M
- JPMORGAN CHASE & CO -9.44M
- EDGEWOOD MANAGEMENT LLC -7.63M, sold out
- PARNASSUS INVESTMENTS, LLC -6.83M
- NEUBERGER BERMAN GROUP LLC -4.95M
- DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main -4.00M
- Rathbones Group PLC -3.82M
- Ninety One UK Ltd -3.81M
Superinvestors
Superinvestors holding BSX
| Investor | Quarter | Shares | Value | % of portfolio | Last quarter |
|---|---|---|---|---|---|
| Dodge & Cox Dodge & Cox | Jun 30, 2026 | 87K | $3.7M | 0.00% | Reduced -1.6% |
| Polen Capital Polen Capital Management | Jun 30, 2026 | 5K | $203K | 0.00% | Reduced -99.2% |
Sold out last quarter: Stephen Mandel
More than 5%
13D filings: owners who may push for change
No Schedule 13D about BSX in the last year.