ALT Altimmune, Inc.
Altimmune, Inc. (ALT) 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 |
|---|---|---|---|---|---|---|
| Deep Track Capital Growth Healthcare | New | +19.25M | — | $58.5M | 0.9% | 70 |
| RA Capital Management Growth Healthcare | New | +6.50M | — | $19.8M | 0.2% | 66 |
| VIKING GLOBAL INVESTORS LP Growth | New | +6.70M | — | $20.4M | 0.1% | 65 |
| Farallon Capital Management Event Value | Sold Out | -27.6K | -100.0% | $83.9K | 0.0% | 60 |
| RENAISSANCE TECHNOLOGIES LLC Quant | New | +71.6K | — | $217.7K | 0.0% | 58 |
| Woodline Partners LP Long/Short | New | +3.40M | — | $10.3M | 0.0% | 58 |
| Alyeska Investment Group, L.P. | Sold Out | -2.64M | -100.0% | $8.0M | 0.0% | 58 |
| Ghisallo Capital Management Long/Short | New | +750.0K | — | $2.3M | 0.1% | 57 |
| Nantahala Capital Management Event Long/Short | New | +3.00M | — | $9.1M | 0.3% | 56 |
| Weiss Asset Management Event Quant | New | +1.53M | — | $4.7M | 0.1% | 56 |
Most significant buyers
By move score, not size.
- Deep Track Capital
- RA Capital Management
- VIKING GLOBAL INVESTORS LP
- RENAISSANCE TECHNOLOGIES LLC
- Woodline Partners LP
Most significant sellers
By move score, not size.
- Farallon Capital Management
- Alyeska Investment Group, L.P.
- ExodusPoint Capital Management
- D. E. Shaw & Co., Inc.
- Point72 Asset Management, L.P.
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Deep Track Capital | 1 | 19.3M | 0 | +19.25M | — | 0.9% | New | 70 |
| RA Capital Management | 1 | 6.5M | 0 | +6.50M | — | 0.2% | New | 66 |
| VIKING GLOBAL INVESTORS LP | 1 | 6.7M | 0 | +6.70M | — | 0.1% | New | 65 |
| Farallon Capital Management | 1 | 0 | 27.6K | -27.6K | -100.0% | 0.0% | Sold Out | 60 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 71.6K | 0 | +71.6K | — | 0.0% | New | 58 |
| Woodline Partners LP | 2 | 3.4M | 0 | +3.40M | — | 0.0% | New | 58 |
| Alyeska Investment Group, L.P. | 2 | 0 | 2.6M | -2.64M | -100.0% | 0.0% | Sold Out | 58 |
| Ghisallo Capital Management | 2 | 750.0K | 0 | +750.0K | — | 0.1% | New | 57 |
| Nantahala Capital Management | 3 | 3.0M | 0 | +3.00M | — | 0.3% | New | 56 |
| Weiss Asset Management | 2 | 1.5M | 0 | +1.53M | — | 0.1% | New | 56 |
| Rock Springs Capital Management | 3 | 471.5K | 0 | +471.5K | — | 0.1% | New | 55 |
| CITADEL ADVISORS LLC | 1 | 983.6K | 448.9K | +534.7K | +119.1% | 0.0% | Increased | 54 |
| ADAR1 Capital Management | 3 | 102.8K | 0 | +102.8K | — | 0.0% | New | 53 |
| LMR Partners | 3 | 300.0K | 0 | +300.0K | — | 0.0% | New | 53 |
| ExodusPoint Capital Management | 3 | 0 | 48.6K | -48.6K | -100.0% | 0.0% | Sold Out | 52 |
| Jain Global | 3 | 18.9K | 0 | +18.9K | — | 0.0% | New | 52 |
| Schonfeld Strategic Advisors | 3 | 35.1K | 0 | +35.1K | — | 0.0% | New | 51 |
| Graham Capital Management | 3 | 44.9K | 0 | +44.9K | — | 0.0% | New | 49 |
| Squarepoint Ops LLC | 2 | 202.4K | 18.1K | +184.3K | +1016.5% | 0.0% | Increased | 48 |
| Winton Group | 4 | 16.1K | 0 | +16.1K | — | 0.0% | New | 48 |
| Centiva Capital | 4 | 17.9K | 0 | +17.9K | — | 0.0% | New | 48 |
| D. E. Shaw & Co., Inc. | 1 | 201.6K | 727.0K | -525.4K | -72.3% | 0.0% | Reduced | 47 |
| AQR Capital Management | 3 | 1.2M | 85.5K | +1.14M | +1328.8% | 0.0% | Increased | 47 |
| Quantbot Technologies | 4 | 45.6K | 0 | +45.6K | — | 0.0% | New | 45 |
| Walleye Capital | 3 | 8.5K | 2 | +8.5K | +424850.0% | 0.0% | Increased | 45 |
| MARSHALL WACE, LLP | 2 | 6.8M | 4.0M | +2.82M | +70.3% | 0.0% | Increased | 45 |
| Point72 Asset Management, L.P. | 1 | 486.9K | 665.3K | -178.4K | -26.8% | 0.0% | Reduced | 35 |
| Brevan Howard Capital Management | 3 | 130.8K | 78.4K | +52.4K | +66.8% | 0.0% | Increased | 35 |
| Engineers Gate | 4 | 38.0K | 116.1K | -78.1K | -67.2% | 0.0% | Reduced | 34 |
| Man Group | 3 | 173.9K | 129.8K | +44.0K | +33.9% | 0.0% | Increased | 29 |
| Caption Management | 3 | 46.6K | 74.4K | -27.8K | -37.4% | 0.0% | Reduced | 28 |
| TWO SIGMA INVESTMENTS, LP | 2 | 2.4M | 2.5M | -97.8K | -3.9% | 0.0% | Reduced | 27 |
| MILLENNIUM MANAGEMENT LLC | 2 | 3.3M | 3.3M | +50.9K | +1.6% | 0.0% | Increased | 27 |
| Voleon Capital Management | 3 | 20.7K | 27.1K | -6.4K | -23.7% | 0.0% | Reduced | 26 |
| Tang Capital Management | 2 | 666.0K | 666.0K | 0 | +0.0% | 0.1% | Unchanged | 20 |
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.