BSX Boston Scientific Corporation
$45.05
Boston Scientific Corporation (BSX) Hedge Fund Activity
This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.
Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.
Hedge fund breadth
+15.07
42 buyers / 31 sellers
Funds compared
74
funds with comparable BSX positions
62 current holders · 66 prior-quarter holders
Net share change
+16.14M
+36.63M added, -20.49M cut
Position activity
8 new
34 increased
19 reduced
12 exited
Most significant moves
Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.
| Fund | Action | Shares changed | Change | Est. value | Portfolio wt. | Score |
|---|---|---|---|---|---|---|
| MKP Capital Management Event Macro | Sold Out | -549.0K | -100.0% | $23.4M | 0.0% | 82 |
| Ilex Capital Partners Long/Short | Sold Out | -2.23M | -100.0% | $95.4M | 0.0% | 78 |
| Deerfield Management Growth Healthcare | New | +1.32M | — | $56.1M | 0.7% | 70 |
| Vestal Point Capital Growth Healthcare | Sold Out | -800.0K | -100.0% | $34.1M | 0.0% | 69 |
| Perceptive Advisors Growth Healthcare | New | +250.0K | — | $10.7M | 0.2% | 65 |
| TWO SIGMA INVESTMENTS, LP Quant | Increased | +9.95M | +105.7% | $424.6M | 0.7% | 64 |
| Lone Pine Capital Long/Short Growth | Sold Out | -104.7K | -100.0% | $4.5M | 0.0% | 62 |
| Farallon Capital Management Event Value | Increased | +3.05M | +40.8% | $130.2M | 2.6% | 61 |
| Point72 Asset Management, L.P. | Reduced | -3.32M | -90.1% | $141.8M | 0.0% | 61 |
| Senator Investment Group Event | New | +300.0K | — | $12.8M | 0.5% | 61 |
Most significant buyers
By move score, not size.
- Deerfield Management
- Perceptive Advisors
- TWO SIGMA INVESTMENTS, LP
- Farallon Capital Management
- Senator Investment Group
Most significant sellers
By move score, not size.
- MKP Capital Management
- Ilex Capital Partners
- Vestal Point Capital
- Lone Pine Capital
- Point72 Asset Management, L.P.
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| MKP Capital Management | 2 | 0 | 549.0K | -549.0K | -100.0% | 0.0% | Sold Out | 82 |
| Ilex Capital Partners | 2 | 0 | 2.2M | -2.23M | -100.0% | 0.0% | Sold Out | 78 |
| Deerfield Management | 1 | 1.3M | 0 | +1.32M | — | 0.7% | New | 70 |
| Vestal Point Capital | 1 | 0 | 800.0K | -800.0K | -100.0% | 0.0% | Sold Out | 69 |
| Perceptive Advisors | 1 | 250.0K | 0 | +250.0K | — | 0.2% | New | 65 |
| TWO SIGMA INVESTMENTS, LP | 2 | 19.4M | 9.4M | +9.95M | +105.7% | 0.7% | Increased | 64 |
| Lone Pine Capital | 1 | 0 | 104.7K | -104.7K | -100.0% | 0.0% | Sold Out | 62 |
| Farallon Capital Management | 1 | 10.5M | 7.5M | +3.05M | +40.8% | 2.6% | Increased | 61 |
| Point72 Asset Management, L.P. | 1 | 365.2K | 3.7M | -3.32M | -90.1% | 0.0% | Reduced | 61 |
| Senator Investment Group | 2 | 300.0K | 0 | +300.0K | — | 0.5% | New | 61 |
| Glenview Capital Management | 2 | 113.1K | 0 | +113.1K | — | 0.1% | New | 60 |
| Bridgewater Associates | 1 | 442.0K | 77.0K | +365.0K | +474.1% | 0.1% | Increased | 59 |
| Rokos Capital Management | 2 | 0 | 140.2K | -140.2K | -100.0% | 0.0% | Sold Out | 59 |
| Davidson Kempner Capital Management | 2 | 0 | 63.3K | -63.3K | -100.0% | 0.0% | Sold Out | 59 |
| WORLDQUANT MILLENNIUM ADVISORS LLC | 2 | 5.8K | 2.3M | -2.27M | -99.7% | 0.0% | Reduced | 59 |
| Armistice Capital | 3 | 265.2K | 0 | +265.2K | — | 0.3% | New | 58 |
| Maverick Capital | 2 | 5.9M | 4.2M | +1.74M | +41.5% | 2.3% | Increased | 58 |
| Balyasny Asset Management L.P. | 2 | 71.3K | 1.4M | -1.28M | -94.7% | 0.0% | Reduced | 57 |
| Voloridge Investment Management | 2 | 3.3M | 1.1M | +2.20M | +203.8% | 0.6% | Increased | 56 |
| TIG Advisors | 3 | 0 | 36.6K | -36.6K | -100.0% | 0.0% | Sold Out | 56 |
| OrbiMed Advisors | 2 | 1.5M | 2.4M | -898.9K | -37.7% | 1.2% | Reduced | 56 |
| Capula Management | 2 | 15.2K | 0 | +15.2K | — | 0.0% | New | 56 |
| Moore Capital Management | 3 | 189.3K | 0 | +189.3K | — | 0.2% | New | 55 |
| Magnetar Capital | 2 | 0 | 7.9K | -7.9K | -100.0% | 0.0% | Sold Out | 54 |
| Holocene Advisors, LP | 2 | 806.7K | 3.4M | -2.62M | -76.5% | 0.1% | Reduced | 54 |
| Weiss Asset Management | 2 | 0 | 13.1K | -13.1K | -100.0% | 0.0% | Sold Out | 54 |
| Integral Health Asset Management | 2 | 900.0K | 550.0K | +350.0K | +63.6% | 1.6% | Increased | 54 |
| Aquatic Capital Management | 4 | 985.5K | 490.6K | +494.9K | +100.9% | 1.4% | Increased | 53 |
| Tudor Investment Corporation | 2 | 1.5M | 632.6K | +845.1K | +133.6% | 0.3% | Increased | 53 |
| Caxton Associates | 3 | 0 | 5.4K | -5.4K | -100.0% | 0.0% | Sold Out | 53 |
| Verition Fund Management | 2 | 410.2K | 95.4K | +314.8K | +330.1% | 0.2% | Increased | 52 |
| Braidwell | 2 | 587.6K | 346.5K | +241.1K | +69.6% | 1.0% | Increased | 52 |
| Winton Group | 4 | 0 | 82.3K | -82.3K | -100.0% | 0.0% | Sold Out | 51 |
| Y-Intercept | 4 | 1.1M | 450.3K | +670.1K | +148.8% | 1.0% | Increased | 51 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 1.7M | 4.6M | -2.96M | -64.0% | 0.1% | Reduced | 51 |
| Trexquant Investment | 3 | 1.2M | 385.5K | +784.3K | +203.4% | 0.3% | Increased | 50 |
| Cinctive Capital Management | 3 | 0 | 20.5K | -20.5K | -100.0% | 0.0% | Sold Out | 50 |
| Qube Research & Technologies Ltd | 2 | 8.9M | 5.6M | +3.37M | +60.6% | 0.4% | Increased | 50 |
| AQR Capital Management | 3 | 9.7M | 5.2M | +4.44M | +84.8% | 0.1% | Increased | 50 |
| Walleye Capital | 3 | 1.6M | 836.0K | +742.2K | +88.8% | 0.5% | Increased | 49 |
| CenterBook Partners | 4 | 14.8K | 0 | +14.8K | — | 0.0% | New | 49 |
| Jain Global | 3 | 73.9K | 17.6K | +56.3K | +320.6% | 0.0% | Increased | 48 |
| Parallax Volatility Advisers | 3 | 135.2K | 1.4K | +133.8K | +9633.5% | 0.3% | Increased | 47 |
| Centiva Capital | 4 | 150.3K | 36.3K | +114.0K | +314.6% | 0.3% | Increased | 46 |
| Boothbay Fund Management | 4 | 155.8K | 75.2K | +80.6K | +107.2% | 0.1% | Increased | 45 |
| Readystate Asset Management | 3 | 9.3K | 3.5K | +5.8K | +163.3% | 0.0% | Increased | 44 |
| Quantbot Technologies | 4 | 235.9K | 73.7K | +162.2K | +220.1% | 0.4% | Increased | 43 |
| MARSHALL WACE, LLP | 2 | 2.4M | 3.6M | -1.20M | -33.1% | 0.1% | Reduced | 41 |
| Hudson Bay Capital Management | 3 | 742.9K | 484.0K | +258.9K | +53.5% | 0.2% | Increased | 41 |
| Edgestream Partners | 4 | 151.8K | 85.8K | +66.0K | +77.0% | 0.2% | Increased | 40 |
| ExodusPoint Capital Management | 3 | 504.9K | 311.4K | +193.6K | +62.2% | 0.2% | Increased | 40 |
| J. Goldman & Co. | 3 | 13.0K | 44.5K | -31.5K | -70.8% | 0.0% | Reduced | 39 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 2.4M | 3.2M | -740.0K | -23.5% | 0.1% | Reduced | 39 |
| D. E. Shaw & Co., Inc. | 1 | 25.5M | 24.3M | +1.15M | +4.7% | 0.7% | Increased | 39 |
| LMR Partners | 3 | 107.5K | 232.8K | -125.3K | -53.8% | 0.1% | Reduced | 38 |
| Capstone Investment Advisors | 3 | 121.1K | 78.2K | +42.9K | +54.8% | 0.1% | Increased | 38 |
| MILLENNIUM MANAGEMENT LLC | 2 | 5.4M | 4.3M | +1.10M | +25.4% | 0.2% | Increased | 38 |
| Voleon Capital Management | 3 | 8.1K | 23.4K | -15.3K | -65.3% | 0.0% | Reduced | 36 |
| CITADEL ADVISORS LLC | 1 | 5.0M | 4.2M | +770.4K | +18.3% | 0.1% | Increased | 36 |
| Brevan Howard Capital Management | 3 | 68.9K | 171.6K | -102.7K | -59.9% | 0.1% | Reduced | 36 |
| Quadrature Capital | 3 | 830.7K | 670.1K | +160.6K | +24.0% | 0.4% | Increased | 32 |
| Rock Springs Capital Management | 3 | 528.5K | 515.3K | +13.2K | +2.6% | 1.1% | Increased | 32 |
| Gotham Asset Management, LLC | 2 | 374.7K | 483.0K | -108.3K | -22.4% | 0.0% | Reduced | 32 |
| Capital Fund Management | 3 | 1.5M | 1.7M | -179.9K | -10.8% | 0.5% | Reduced | 31 |
| Caption Management | 3 | 312.1K | 374.4K | -62.4K | -16.7% | 0.5% | Reduced | 31 |
| Man Group | 3 | 3.2M | 3.7M | -493.6K | -13.3% | 0.3% | Reduced | 31 |
| Schonfeld Strategic Advisors | 3 | 1.3M | 1.1M | +221.4K | +20.0% | 0.4% | Increased | 31 |
| Suvretta Capital Management | 2 | 140.1K | 123.9K | +16.1K | +13.0% | 0.1% | Increased | 31 |
| ADAR1 Capital Management | 3 | 7.5K | 10.0K | -2.5K | -25.0% | 0.0% | Reduced | 28 |
| Woodline Partners LP | 2 | 324.4K | 290.5K | +34.0K | +11.7% | 0.0% | Increased | 28 |
| Squarepoint Ops LLC | 2 | 1.6M | 1.6M | +35.0K | +2.2% | 0.2% | Increased | 27 |
| Lighthouse Investment Partners | 3 | 30.0K | 41.2K | -11.1K | -27.1% | 0.0% | Reduced | 27 |
| Engineers Gate | 4 | 296.1K | 300.8K | -4.7K | -1.6% | 0.2% | Reduced | 18 |
| Systematic Alpha Investments | 2 | 21.8K | 21.8K | 0 | +0.0% | 0.0% | Unchanged | 18 |
Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeHedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.