JAZZ Jazz Pharmaceuticals plc
Jazz Pharmaceuticals plc (JAZZ) 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.
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 |
|---|---|---|---|---|---|---|
| EcoR1 Capital Growth Healthcare | Sold Out | -1.71M | -100.0% | $411.2M | 0.0% | 90 |
| Point72 Asset Management, L.P. | Sold Out | -358.6K | -100.0% | $86.4M | 0.0% | 66 |
| Alyeska Investment Group, L.P. | Sold Out | -411.0K | -100.0% | $99.0M | 0.0% | 63 |
| Rokos Capital Management Macro | Sold Out | -52.0K | -100.0% | $12.5M | 0.0% | 61 |
| Integral Health Asset Management Growth Healthcare | New | +30.0K | — | $7.2M | 0.3% | 59 |
| Squarepoint Ops LLC Quant | New | +53.1K | — | $12.8M | 0.0% | 59 |
| Woodline Partners LP Long/Short | New | +150.1K | — | $36.2M | 0.1% | 59 |
| Balyasny Asset Management L.P. | New | +2.0K | — | $487.5K | 0.0% | 57 |
| TWO SIGMA INVESTMENTS, LP Quant | Increased | +380.6K | +1941.9% | $91.7M | 0.1% | 57 |
| Weiss Asset Management Event Quant | New | +12.1K | — | $2.9M | 0.0% | 56 |
Most significant buyers
By move score, not size.
- Integral Health Asset Management
- Squarepoint Ops LLC
- Woodline Partners LP
- Balyasny Asset Management L.P.
- TWO SIGMA INVESTMENTS, LP
Most significant sellers
By move score, not size.
- EcoR1 Capital
- Point72 Asset Management, L.P.
- Alyeska Investment Group, L.P.
- Rokos Capital Management
- Walleye Capital
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| EcoR1 Capital | 2 | 0 | 1.7M | -1.71M | -100.0% | 0.0% | Sold Out | 90 |
| Point72 Asset Management, L.P. | 1 | 0 | 358.6K | -358.6K | -100.0% | 0.0% | Sold Out | 66 |
| Alyeska Investment Group, L.P. | 2 | 0 | 411.0K | -411.0K | -100.0% | 0.0% | Sold Out | 63 |
| Rokos Capital Management | 2 | 0 | 52.0K | -52.0K | -100.0% | 0.0% | Sold Out | 61 |
| Integral Health Asset Management | 2 | 30.0K | 0 | +30.0K | — | 0.3% | New | 59 |
| Squarepoint Ops LLC | 2 | 53.1K | 0 | +53.1K | — | 0.0% | New | 59 |
| Woodline Partners LP | 2 | 150.1K | 0 | +150.1K | — | 0.1% | New | 59 |
| Balyasny Asset Management L.P. | 2 | 2.0K | 0 | +2.0K | — | 0.0% | New | 57 |
| TWO SIGMA INVESTMENTS, LP | 2 | 400.2K | 19.6K | +380.6K | +1941.9% | 0.1% | Increased | 57 |
| Weiss Asset Management | 2 | 12.1K | 0 | +12.1K | — | 0.0% | New | 56 |
| Walleye Capital | 3 | 0 | 87.4K | -87.4K | -100.0% | 0.0% | Sold Out | 56 |
| Rock Springs Capital Management | 3 | 0 | 5.8K | -5.8K | -100.0% | 0.0% | Sold Out | 55 |
| Holocene Advisors, LP | 2 | 161.0K | 733.9K | -572.9K | -78.1% | 0.1% | Reduced | 54 |
| Cinctive Capital Management | 3 | 0 | 34.7K | -34.7K | -100.0% | 0.0% | Sold Out | 54 |
| ADAR1 Capital Management | 3 | 0 | 3.0K | -3.0K | -100.0% | 0.0% | Sold Out | 53 |
| MARSHALL WACE, LLP | 2 | 34.8K | 12.4K | +22.4K | +181.1% | 0.0% | Increased | 52 |
| WORLDQUANT MILLENNIUM ADVISORS LLC | 2 | 55.4K | 23.7K | +31.7K | +134.0% | 0.0% | Increased | 52 |
| Graham Capital Management | 3 | 0 | 4.6K | -4.6K | -100.0% | 0.0% | Sold Out | 51 |
| CenterBook Partners | 4 | 11.7K | 0 | +11.7K | — | 0.1% | New | 51 |
| D. E. Shaw & Co., Inc. | 1 | 87.1K | 298.1K | -211.0K | -70.8% | 0.0% | Reduced | 51 |
| Y-Intercept | 4 | 10.3K | 0 | +10.3K | — | 0.1% | New | 50 |
| Quadrature Capital | 3 | 16.9K | 7.8K | +9.1K | +116.1% | 0.0% | Increased | 49 |
| Boothbay Fund Management | 4 | 0 | 3.7K | -3.7K | -100.0% | 0.0% | Sold Out | 49 |
| Winton Group | 4 | 1.6K | 0 | +1.6K | — | 0.0% | New | 48 |
| Engineers Gate | 4 | 6.3K | 93.0K | -86.7K | -93.2% | 0.0% | Reduced | 45 |
| MILLENNIUM MANAGEMENT LLC | 2 | 763.9K | 1.3M | -498.6K | -39.5% | 0.1% | Reduced | 45 |
| ExodusPoint Capital Management | 3 | 53.2K | 178.8K | -125.6K | -70.2% | 0.1% | Reduced | 44 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 562.1K | 819.4K | -257.3K | -31.4% | 0.2% | Reduced | 42 |
| Wolverine Asset Management | 2 | 2.3K | 1.3K | +1.0K | +76.2% | 0.0% | Increased | 42 |
| CITADEL ADVISORS LLC | 1 | 1.0M | 1.3M | -252.8K | -20.1% | 0.2% | Reduced | 39 |
| Aquatic Capital Management | 4 | 1.9K | 1.1K | +844 | +80.4% | 0.0% | Increased | 37 |
| Lighthouse Investment Partners | 3 | 15.0K | 33.7K | -18.7K | -55.5% | 0.1% | Reduced | 37 |
| Gotham Asset Management, LLC | 2 | 112.0K | 91.6K | +20.4K | +22.3% | 0.1% | Increased | 31 |
| Qube Research & Technologies Ltd | 2 | 290.7K | 262.6K | +28.2K | +10.7% | 0.1% | Increased | 29 |
| Schonfeld Strategic Advisors | 3 | 77.3K | 62.1K | +15.1K | +24.3% | 0.1% | Increased | 29 |
| AQR Capital Management | 3 | 1.5M | 1.3M | +184.1K | +13.8% | 0.1% | Increased | 28 |
| Man Group | 3 | 152.9K | 135.2K | +17.7K | +13.1% | 0.1% | Increased | 26 |
| Perceptive Advisors | 1 | 170.0K | 170.0K | 0 | +0.0% | 0.6% | Unchanged | 27 |
| CastleKnight Management | 3 | 11.9K | 11.9K | 0 | +0.0% | 0.1% | Unchanged | 15 |
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.