7 hedge funds and family offices disclose a BSX position in their latest SEC 13F filing — combined $1.20B in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Egerton Capital | Egerton Capital (UK) LLP | 5,385,084 | $513.5M | 5.58% | 2025-12-31 |
| 2 | Polen Capital | Polen Capital Management LLC | 4,019,552 | $383.3M | 1.64% | 2025-12-31 |
| 3 | Lee Ainslie | Maverick Capital Ltd | 2,944,254 | $280.7M | 3.02% | 2025-12-31 |
| 4 | Stephen Mandel | Lone Pine Capital LLC | 201,703 | $19.2M | 0.14% | 2025-12-31 |
| 5 | Ray Dalio | Bridgewater Associates LP | 76,992 | $4.8M | 0.02% | 2026-03-31 |
| 6 | Mairs & Power | Mairs & Power Inc | 10,176 | $970K | 0.01% | 2025-12-31 |
| 7 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 1,065 | $102K | 0.02% | 2025-12-31 |
As of the latest 13F window, 7 tracked superinvestors hold BSX. The largest disclosed position is Egerton Capital at $513.5M (5.6% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying BSX, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
7 hedge funds and family offices disclose a BSX position in their latest SEC 13F filing — combined $1.20B in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Egerton Capital | Egerton Capital (UK) LLP | 5,385,084 | $513.5M | 5.58% | 2025-12-31 |
| 2 | Polen Capital | Polen Capital Management LLC | 4,019,552 | $383.3M | 1.64% | 2025-12-31 |
| 3 | Lee Ainslie | Maverick Capital Ltd | 2,944,254 | $280.7M | 3.02% | 2025-12-31 |
| 4 | Stephen Mandel | Lone Pine Capital LLC | 201,703 | $19.2M | 0.14% | 2025-12-31 |
| 5 | Ray Dalio | Bridgewater Associates LP | 76,992 | $4.8M | 0.02% | 2026-03-31 |
| 6 | Mairs & Power | Mairs & Power Inc | 10,176 | $970K | 0.01% | 2025-12-31 |
| 7 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 1,065 | $102K | 0.02% | 2025-12-31 |
As of the latest 13F window, 7 tracked superinvestors hold BSX. The largest disclosed position is Egerton Capital at $513.5M (5.6% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying BSX, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
