Boston Scientific (BSX) Held by Superinvestors
BOSTON SCIENTIFIC CORP (BSX) is currently held by 7 superinvestors tracked by InsiderSet, with a combined reported market value of approximately $206.48M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Renaissance Technologies LLC is currently the largest disclosed institutional shareholder of BSX tracked by InsiderSet, reporting ownership valued at approximately $102.94M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $102.97M, representing an estimated gain of +0.02% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed BSX value among the investors covered in this analysis. Major shareholders include Renaissance Technologies LLC, Parnassus Endeavor Fund, Causeway Capital Management, and several other long-term asset managers with concentrated positions in BOSTON SCIENTIFIC CORP (BSX).
This page ranks the largest institutional BSX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Renaissance Technologies LLC | Jim Simons | 0.14% | 2,412,005 | $102,944,373 | $102,968,493 | +$24,120 | +0.02% |
| Parnassus Endeavor Fund | Parnassus Investments | 0.20% | 1,519,438 | $66,323,469 | $64,864,808 | -$1,458,661 | -2.20% |
| Causeway Capital Management | Sarah Ketterer | 0.33% | 720,339 | $30,744,061 | $30,751,272 | +$7,211 | +0.02% |
| Dodge & Cox Stock Fund | V. D. Dodge, E. M. Cox | 0.00% | 87,485 | $3,733,860 | $3,734,735 | +$875 | +0.02% |
| Sequoia Financial Advisors | 0.01% | 49,355 | $2,106,482 | $2,106,965 | +$483 | +0.02% | |
| Mairs & Power Growth Fund | Andrew R. Adams | 0.00% | 9,914 | $423,130 | $423,229 | +$99 | +0.02% |
| Polen Capital Management | David M. Polen | 0.00% | 4,750 | $202,733 | $202,778 | +$45 | +0.02% |
Frequently asked questions about BSX
Who are the largest superinvestors holding BSX?
The largest superinvestors holding BSX in the latest SEC Form 13F filings include Renaissance Technologies LLC, Parnassus Endeavor Fund, Causeway Capital Management, Dodge & Cox Stock Fund, and Sequoia Financial Advisors. InsiderSet ranks these superinvestors by their latest reported BSX position.
What does the BSX superinvestors page include?
This page tracks BSX positions reported by a curated group of notable institutional investors and fund managers through SEC Form 13F. BOSTON SCIENTIFIC CORP (BSX) on this page reflects disclosed 13F holdings among those superinvestors, not every institutional shareholder of the stock.
How many superinvestors hold BSX?
InsiderSet currently tracks 7 superinvestors reporting BSX holdings in the latest available 13F data. This is the curated set on this page, not the total number of institutions that own BSX.
How much BSX stock do superinvestors hold?
Superinvestors tracked by InsiderSet disclosed approximately $206.48M in BSX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value, and it covers the curated superinvestors on this page rather than every institutional filer.
When were BSX superinvestor holdings last updated?
The latest BSX superinvestor holdings on InsiderSet are based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time holdings.
Are superinvestor BSX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by these superinvestors as of the end of the reporting quarter. A superinvestor may have changed its BSX position after the reporting date.
Are superinvestors buying or selling BSX?
Buying and selling can be analyzed by comparing BSX positions across consecutive 13F reporting periods. InsiderSet's BSX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View BSX ownership changes.
How have superinvestor BSX holdings changed over time?
InsiderSet tracks BSX holdings among these superinvestors across multiple 13F reporting periods, so holder counts, reported value, and reported shares can be compared over time.