RNA Atrium Therapeutics, Inc.
Atrium Therapeutics, Inc. (RNA) 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 |
|---|---|---|---|---|---|---|
| RA Capital Management Growth Healthcare | Sold Out | -864.1K | -100.0% | $11.6M | 0.0% | 66 |
| Farallon Capital Management Event Value | Sold Out | -349.4K | -100.0% | $4.7M | 0.0% | 62 |
| Pentwater Capital Management Event | Sold Out | -602.6K | -100.0% | $8.1M | 0.0% | 61 |
| Point72 Asset Management, L.P. | Sold Out | -22.7K | -100.0% | $305.4K | 0.0% | 59 |
| RENAISSANCE TECHNOLOGIES LLC Quant | New | +15.0K | — | $201.4K | 0.0% | 58 |
| Sessa Capital Event Long/Short | Increased | +948.6K | +172.0% | $12.8M | 0.4% | 57 |
| MARSHALL WACE, LLP Long/Short | Sold Out | -33.7K | -100.0% | $453.1K | 0.0% | 56 |
| Highbridge Capital Management Event Macro | Sold Out | -41.0K | -100.0% | $551.3K | 0.0% | 55 |
| Magnetar Capital Event Quant | Sold Out | -10.5K | -100.0% | $141.4K | 0.0% | 54 |
| Woodline Partners LP Long/Short | Sold Out | -28.8K | -100.0% | $388.0K | 0.0% | 54 |
Most significant buyers
By move score, not size.
- RENAISSANCE TECHNOLOGIES LLC
- Sessa Capital
- AQR Capital Management
- TWO SIGMA INVESTMENTS, LP
- Polar Asset Management Partners
Most significant sellers
By move score, not size.
- RA Capital Management
- Farallon Capital Management
- Pentwater Capital Management
- Point72 Asset Management, L.P.
- MARSHALL WACE, LLP
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| RA Capital Management | 1 | 0 | 864.1K | -864.1K | -100.0% | 0.0% | Sold Out | 66 |
| Farallon Capital Management | 1 | 0 | 349.4K | -349.4K | -100.0% | 0.0% | Sold Out | 62 |
| Pentwater Capital Management | 1 | 0 | 602.6K | -602.6K | -100.0% | 0.0% | Sold Out | 61 |
| Point72 Asset Management, L.P. | 1 | 0 | 22.7K | -22.7K | -100.0% | 0.0% | Sold Out | 59 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 15.0K | 0 | +15.0K | — | 0.0% | New | 58 |
| Sessa Capital | 2 | 1.5M | 551.4K | +948.6K | +172.0% | 0.4% | Increased | 57 |
| MARSHALL WACE, LLP | 2 | 0 | 33.7K | -33.7K | -100.0% | 0.0% | Sold Out | 56 |
| Highbridge Capital Management | 2 | 0 | 41.0K | -41.0K | -100.0% | 0.0% | Sold Out | 55 |
| Magnetar Capital | 2 | 0 | 10.5K | -10.5K | -100.0% | 0.0% | Sold Out | 54 |
| Woodline Partners LP | 2 | 0 | 28.8K | -28.8K | -100.0% | 0.0% | Sold Out | 54 |
| AQR Capital Management | 3 | 172.2K | 0 | +172.2K | — | 0.0% | New | 53 |
| TWO SIGMA INVESTMENTS, LP | 2 | 345.5K | 178.6K | +166.9K | +93.5% | 0.0% | Increased | 51 |
| Polar Asset Management Partners | 3 | 150.0K | 70.0K | +80.0K | +114.3% | 0.1% | Increased | 49 |
| Y-Intercept | 4 | 35.1K | 0 | +35.1K | — | 0.0% | New | 48 |
| Centiva Capital | 4 | 0 | 5.9K | -5.9K | -100.0% | 0.0% | Sold Out | 48 |
| Quantbot Technologies | 4 | 3.6K | 0 | +3.6K | — | 0.0% | New | 45 |
| Tudor Investment Corporation | 2 | 129.6K | 71.4K | +58.2K | +81.6% | 0.0% | Increased | 43 |
| Balyasny Asset Management L.P. | 2 | 105.9K | 235.1K | -129.2K | -55.0% | 0.0% | Reduced | 42 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 100.0K | 183.6K | -83.6K | -45.5% | 0.0% | Reduced | 38 |
| CITADEL ADVISORS LLC | 1 | 67.6K | 109.9K | -42.3K | -38.5% | 0.0% | Reduced | 36 |
| Squarepoint Ops LLC | 2 | 146.7K | 231.5K | -84.7K | -36.6% | 0.0% | Reduced | 35 |
| ExodusPoint Capital Management | 3 | 117.3K | 77.4K | +39.8K | +51.4% | 0.0% | Increased | 34 |
| MILLENNIUM MANAGEMENT LLC | 2 | 200.6K | 190.9K | +9.7K | +5.1% | 0.0% | Increased | 27 |
| Brevan Howard Capital Management | 3 | 20.8K | 31.6K | -10.8K | -34.2% | 0.0% | Reduced | 27 |
| TIG Advisors | 3 | 561.5K | 607.6K | -46.0K | -7.6% | 0.5% | Reduced | 27 |
| Caption Management | 3 | 75.3K | 103.6K | -28.3K | -27.3% | 0.0% | Reduced | 26 |
| Weiss Asset Management | 2 | 219.7K | 240.7K | -21.0K | -8.7% | 0.0% | Reduced | 26 |
| Schonfeld Strategic Advisors | 3 | 199.2K | 162.8K | +36.4K | +22.4% | 0.0% | Increased | 26 |
| ADAR1 Capital Management | 3 | 57.7K | 57.7K | 0 | +0.0% | 0.0% | Unchanged | 17 |
| Caxton Associates | 3 | 44.2K | 44.2K | 0 | +0.0% | 0.0% | Unchanged | 17 |
| Saba Capital Management | 3 | 39.6K | 39.6K | 0 | +0.0% | 0.0% | Unchanged | 17 |
| LMR Partners | 3 | 32.5K | 32.5K | 0 | +0.0% | 0.0% | Unchanged | 17 |
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.