# BOSTON SCIENTIFIC CORP (BSX) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 101137107
Page URL: https://superinvestorclub.com/stock/BSX
Last updated: 2026-07-08T11:37:27.362Z

## Summary

As of the most recent 13F filing period, BOSTON SCIENTIFIC CORP (BSX) is held by 7 tracked superinvestors with an aggregate position value of $380.0M representing 041950891000000579739104655888857699210176 shares.

## Top institutional holders (7)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Lee Ainslie](https://superinvestorclub.com/manager/58) | Maverick Capital | 4195089 | $263.2M | 3.04% | 2026-03-31 |
| 2 | [Lee Ainslie](https://superinvestorclub.com/manager/58) | Maverick Capital | 1000000 | $62.8M | 0.72% | 2026-03-31 |
| 3 | [Polen Capital](https://superinvestorclub.com/manager/271) | Polen Capital Management | 579739 | $36.4M | 0.25% | 2026-03-31 |
| 4 | [Stephen Mandel](https://superinvestorclub.com/manager/61) | Lone Pine Capital | 104655 | $6.6M | 0.05% | 2026-03-31 |
| 5 | [Dodge & Cox](https://superinvestorclub.com/manager/16) | Dodge & Cox | 88885 | $5.6M | 0.00% | 2026-03-31 |
| 6 | [Ray Dalio](https://superinvestorclub.com/manager/6) | Bridgewater Associates | 76992 | $4.8M | 0.02% | 2026-03-31 |
| 7 | [Mairs & Power](https://superinvestorclub.com/manager/92) | Mairs & Power | 10176 | $638,544 | 0.01% | 2026-03-31 |

## Ownership history (quarter-over-quarter)

- 2023-12-31: 1 holders, $5.6M aggregate, 097095 shares
- 2024-03-31: 3 holders, $216.9M aggregate, 01724755134449997095 shares
- 2024-06-30: 2 holders, $97.7M aggregate, 0117194697095 shares
- 2024-09-30: 4 holders, $119.8M aggregate, 09672103567649529510311 shares
- 2024-12-31: 4 holders, $218.0M aggregate, 021722081629139479510311 shares
- 2025-03-31: 4 holders, $256.5M aggregate, 02376764916956395410311 shares
- 2025-06-30: 4 holders, $518.3M aggregate, 0304576416409569038548284 shares
- 2025-09-30: 6 holders, $1.35B aggregate, 05598286531250426416821597298888510307 shares
- 2025-12-31: 8 holders, $1.45B aggregate, 05385084401955229442542509808201703937458888510176 shares
- 2026-03-31: 7 holders, $380.0M aggregate, 041950891000000579739104655888857699210176 shares

## Recent congressional trades (31)

- 2026-01-30: Gil Cisneros (Democrat-CA) purchase $1,001 - $15,000
- 2025-12-29: Markwayne Mullin (Republican-OK) purchase $15,001 - $50,000
- 2025-12-24: Gil Cisneros (Democrat-CA) sale $1,001 - $15,000
- 2025-12-17: John Boozman (Republican-AR) sale $1,001 - $15,000
- 2025-11-18: Gil Cisneros (Democrat-CA) purchase $1,001 - $15,000
- 2025-10-31: Lisa McClain (Republican-MI) sale $1,001 - $15,000
- 2025-10-30: Lisa McClain (Republican-MI) sale $1,001 - $15,000
- 2025-10-30: Lisa McClain (Republican-MI) purchase $1,001 - $15,000
- 2025-10-28: Kevin Hern (Republican-OK) sale $15,001 - $50,000
- 2025-10-17: Gil Cisneros (Democrat-CA) purchase $1,001 - $15,000
- 2025-10-07: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-08-04: Lisa McClain (Republican-MI) sale $1,001 - $15,000
- 2025-07-31: Gil Cisneros (Democrat-CA) sale $1,001 - $15,000
- 2025-06-26: Gil Cisneros (Democrat-CA) sale $1,001 - $15,000
- 2025-06-11: Gil Cisneros (Democrat-CA) sale $1,001 - $15,000

## Recent insider transactions (0)


## Citation

When citing, use: "BOSTON SCIENTIFIC CORP (BSX) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/BSX), aggregating SEC 13F, Form 4, and congressional disclosures."