ARTV Artiva Biotherapeutics, Inc.
Artiva Biotherapeutics, Inc. (ARTV) 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 |
|---|---|---|---|---|---|---|
| Caligan Partners Activist Event | New | +1.74M | — | $16.8M | 0.8% | 70 |
| VIKING GLOBAL INVESTORS LP Growth | New | +2.60M | — | $25.3M | 0.1% | 65 |
| RA Capital Management Growth Healthcare | Increased | +8.10M | +82.2% | $78.6M | 1.5% | 64 |
| MILLENNIUM MANAGEMENT LLC | Sold Out | -123.3K | -100.0% | $1.2M | 0.0% | 59 |
| Nantahala Capital Management Event Long/Short | New | +600.0K | — | $5.8M | 0.2% | 56 |
| ADAR1 Capital Management Long/Short Growth | New | +118.6K | — | $1.2M | 0.1% | 55 |
| Squarepoint Ops LLC Quant | New | +14.9K | — | $144.1K | 0.0% | 54 |
| CITADEL ADVISORS LLC Quant | Increased | +593.5K | +3739.8% | $5.8M | 0.0% | 54 |
| Quadrature Capital Quant | New | +49.3K | — | $478.6K | 0.0% | 53 |
| Alyeska Investment Group, L.P. | Increased | +173.6K | +173.6% | $1.7M | 0.0% | 52 |
Most significant buyers
By move score, not size.
- Caligan Partners
- VIKING GLOBAL INVESTORS LP
- RA Capital Management
- Nantahala Capital Management
- ADAR1 Capital Management
Most significant sellers
By move score, not size.
- MILLENNIUM MANAGEMENT LLC
- TWO SIGMA INVESTMENTS, LP
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Caligan Partners | 2 | 1.7M | 0 | +1.74M | — | 0.8% | New | 70 |
| VIKING GLOBAL INVESTORS LP | 1 | 2.6M | 0 | +2.60M | — | 0.1% | New | 65 |
| RA Capital Management | 1 | 18.0M | 9.9M | +8.10M | +82.2% | 1.5% | Increased | 64 |
| MILLENNIUM MANAGEMENT LLC | 2 | 0 | 123.3K | -123.3K | -100.0% | 0.0% | Sold Out | 59 |
| Nantahala Capital Management | 3 | 600.0K | 0 | +600.0K | — | 0.2% | New | 56 |
| ADAR1 Capital Management | 3 | 118.6K | 0 | +118.6K | — | 0.1% | New | 55 |
| Squarepoint Ops LLC | 2 | 14.9K | 0 | +14.9K | — | 0.0% | New | 54 |
| CITADEL ADVISORS LLC | 1 | 609.4K | 15.9K | +593.5K | +3739.8% | 0.0% | Increased | 54 |
| Quadrature Capital | 3 | 49.3K | 0 | +49.3K | — | 0.0% | New | 53 |
| Alyeska Investment Group, L.P. | 2 | 273.6K | 100.0K | +173.6K | +173.6% | 0.0% | Increased | 52 |
| Boothbay Fund Management | 4 | 314.4K | 0 | +314.4K | — | 0.1% | New | 51 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 151.0K | 80.0K | +71.0K | +88.7% | 0.0% | Increased | 49 |
| TWO SIGMA INVESTMENTS, LP | 2 | 78.6K | 115.0K | -36.5K | -31.7% | 0.0% | Reduced | 34 |
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.