REGN Regeneron Pharmaceuticals, Inc.
Regeneron Pharmaceuticals, Inc. (REGN) 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 |
|---|---|---|---|---|---|---|
| WORLDQUANT MILLENNIUM ADVISORS LLC Quant | Increased | +253.3K | +251.6% | $157.9M | 0.8% | 62 |
| Point72 Asset Management, L.P. | Sold Out | -2.2K | -100.0% | $1.4M | 0.0% | 61 |
| OrbiMed Advisors Growth Healthcare | Sold Out | -14.7K | -100.0% | $9.2M | 0.0% | 60 |
| Bridgewater Associates Quant Macro | Increased | +28.6K | +125.9% | $17.8M | 0.2% | 60 |
| Integral Health Asset Management Growth Healthcare | Reduced | -45.0K | -52.9% | $28.1M | 1.0% | 59 |
| RENAISSANCE TECHNOLOGIES LLC Quant | Increased | +81.4K | +121.9% | $50.8M | 0.1% | 59 |
| Armistice Capital Long/Short Healthcare | Increased | +53.7K | +148.6% | $33.5M | 1.6% | 58 |
| MILLENNIUM MANAGEMENT LLC | Increased | +102.4K | +163.2% | $63.8M | 0.1% | 58 |
| Rock Springs Capital Management Growth Healthcare | Sold Out | -10.1K | -100.0% | $6.3M | 0.0% | 57 |
| Qube Research & Technologies Ltd Quant | Increased | +138.2K | +165.8% | $86.2M | 0.2% | 56 |
Most significant buyers
By move score, not size.
- WORLDQUANT MILLENNIUM ADVISORS LLC
- Bridgewater Associates
- RENAISSANCE TECHNOLOGIES LLC
- Armistice Capital
- MILLENNIUM MANAGEMENT LLC
Most significant sellers
By move score, not size.
- Point72 Asset Management, L.P.
- OrbiMed Advisors
- Integral Health Asset Management
- Rock Springs Capital Management
- ExodusPoint Capital Management
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| WORLDQUANT MILLENNIUM ADVISORS LLC | 2 | 354.0K | 100.7K | +253.3K | +251.6% | 0.8% | Increased | 62 |
| Point72 Asset Management, L.P. | 1 | 0 | 2.2K | -2.2K | -100.0% | 0.0% | Sold Out | 61 |
| OrbiMed Advisors | 2 | 0 | 14.7K | -14.7K | -100.0% | 0.0% | Sold Out | 60 |
| Bridgewater Associates | 1 | 51.3K | 22.7K | +28.6K | +125.9% | 0.2% | Increased | 60 |
| Integral Health Asset Management | 2 | 40.0K | 85.0K | -45.0K | -52.9% | 1.0% | Reduced | 59 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 148.2K | 66.8K | +81.4K | +121.9% | 0.1% | Increased | 59 |
| Armistice Capital | 3 | 89.8K | 36.1K | +53.7K | +148.6% | 1.6% | Increased | 58 |
| MILLENNIUM MANAGEMENT LLC | 2 | 165.1K | 62.7K | +102.4K | +163.2% | 0.1% | Increased | 58 |
| Rock Springs Capital Management | 3 | 0 | 10.1K | -10.1K | -100.0% | 0.0% | Sold Out | 57 |
| Qube Research & Technologies Ltd | 2 | 221.6K | 83.4K | +138.2K | +165.8% | 0.2% | Increased | 56 |
| Voloridge Investment Management | 2 | 164.0K | 15.4K | +148.6K | +967.2% | 0.4% | Increased | 56 |
| Aquatic Capital Management | 4 | 32.6K | 0 | +32.6K | — | 0.7% | New | 56 |
| ExodusPoint Capital Management | 3 | 0 | 3.8K | -3.8K | -100.0% | 0.0% | Sold Out | 54 |
| MARSHALL WACE, LLP | 2 | 23.0K | 353 | +22.6K | +6415.6% | 0.0% | Increased | 54 |
| Weiss Asset Management | 2 | 0 | 336 | -336 | -100.0% | 0.0% | Sold Out | 54 |
| Cinctive Capital Management | 3 | 0 | 9.3K | -9.3K | -100.0% | 0.0% | Sold Out | 54 |
| Balyasny Asset Management L.P. | 2 | 9.4K | 1.5K | +7.9K | +526.7% | 0.0% | Increased | 53 |
| Schonfeld Strategic Advisors | 3 | 4.8K | 0 | +4.8K | — | 0.0% | New | 53 |
| Capstone Investment Advisors | 3 | 1.2K | 0 | +1.2K | — | 0.0% | New | 53 |
| Quadrature Capital | 3 | 49.1K | 18.6K | +30.5K | +163.8% | 0.3% | Increased | 52 |
| LMR Partners | 3 | 22.3K | 143 | +22.2K | +15498.6% | 0.2% | Increased | 52 |
| Edgestream Partners | 4 | 4.3K | 0 | +4.3K | — | 0.1% | New | 51 |
| Lighthouse Investment Partners | 3 | 0 | 485 | -485 | -100.0% | 0.0% | Sold Out | 51 |
| Y-Intercept | 4 | 3.2K | 0 | +3.2K | — | 0.0% | New | 50 |
| Verition Fund Management | 2 | 3.3K | 1.5K | +1.8K | +124.1% | 0.0% | Increased | 50 |
| Walleye Capital | 3 | 22.6K | 4.0K | +18.6K | +461.8% | 0.1% | Increased | 50 |
| Readystate Asset Management | 3 | 530 | 0 | +530 | — | 0.0% | New | 50 |
| Trexquant Investment | 3 | 41.8K | 11.1K | +30.8K | +277.9% | 0.2% | Increased | 50 |
| Graham Capital Management | 3 | 861 | 0 | +861 | — | 0.0% | New | 49 |
| ADAR1 Capital Management | 3 | 22.2K | 12.2K | +10.1K | +82.7% | 0.7% | Increased | 48 |
| CenterBook Partners | 4 | 15.5K | 5.1K | +10.4K | +206.0% | 0.5% | Increased | 47 |
| Centiva Capital | 4 | 408 | 14.6K | -14.2K | -97.2% | 0.0% | Reduced | 47 |
| D. E. Shaw & Co., Inc. | 1 | 38.5K | 22.7K | +15.7K | +69.3% | 0.0% | Increased | 46 |
| Brevan Howard Capital Management | 3 | 2.0K | 334 | +1.6K | +492.5% | 0.0% | Increased | 45 |
| Quantbot Technologies | 4 | 1.5K | 0 | +1.5K | — | 0.0% | New | 45 |
| Engineers Gate | 4 | 15.9K | 361 | +15.6K | +4309.4% | 0.1% | Increased | 44 |
| Alphadyne Asset Management | 3 | 48 | 754 | -706 | -93.6% | 0.0% | Reduced | 44 |
| Winton Group | 4 | 1.8K | 14.8K | -13.0K | -87.8% | 0.0% | Reduced | 43 |
| TWO SIGMA INVESTMENTS, LP | 2 | 656.1K | 812.2K | -156.1K | -19.2% | 0.3% | Reduced | 39 |
| Man Group | 3 | 437.0K | 315.2K | +121.7K | +38.6% | 0.5% | Increased | 39 |
| J. Goldman & Co. | 3 | 6.9K | 16.3K | -9.3K | -57.4% | 0.2% | Reduced | 39 |
| Hudson Bay Capital Management | 3 | 17.5K | 32.0K | -14.5K | -45.3% | 0.1% | Reduced | 37 |
| Gotham Asset Management, LLC | 2 | 105.2K | 82.8K | +22.3K | +26.9% | 0.2% | Increased | 35 |
| Squarepoint Ops LLC | 2 | 198.6K | 162.8K | +35.8K | +22.0% | 0.3% | Increased | 35 |
| CITADEL ADVISORS LLC | 1 | 57.6K | 47.7K | +9.9K | +20.8% | 0.0% | Increased | 34 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 83.6K | 103.1K | -19.4K | -18.9% | 0.1% | Reduced | 34 |
| AQR Capital Management | 3 | 1.1M | 1.2M | -104.9K | -8.5% | 0.3% | Reduced | 30 |
| Magnetar Capital | 2 | 1.3K | 1.1K | +210 | +18.6% | 0.0% | Increased | 28 |
| Woodline Partners LP | 2 | 72.6K | 67.8K | +4.8K | +7.1% | 0.1% | Increased | 28 |
| Voleon Capital Management | 3 | 8.5K | 8.9K | -342 | -3.9% | 0.1% | Reduced | 22 |
| Boothbay Fund Management | 4 | 3.3K | 3.0K | +340 | +11.4% | 0.0% | Increased | 21 |
| Vestal Point Capital | 1 | 40.0K | 40.0K | 0 | +0.0% | 0.6% | Unchanged | 27 |
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.