IRTC iRhythm Technologies, Inc.
iRhythm Technologies, Inc. (IRTC) 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 |
|---|---|---|---|---|---|---|
| Integral Health Asset Management Growth Healthcare | New | +90.0K | — | $10.7M | 0.4% | 62 |
| Perceptive Advisors Growth Healthcare | Increased | +118.7K | +113.1% | $14.1M | 0.4% | 60 |
| TWO SIGMA INVESTMENTS, LP Quant | Sold Out | -52.6K | -100.0% | $6.3M | 0.0% | 59 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Sold Out | -8.3K | -100.0% | $986.0K | 0.0% | 56 |
| RTW Investments Growth Healthcare | Increased | +514.1K | +30.8% | $61.2M | 2.2% | 55 |
| Capital Fund Management Quant Macro | New | +10.6K | — | $1.3M | 0.0% | 55 |
| Balyasny Asset Management L.P. | Reduced | -188.9K | -97.1% | $22.5M | 0.0% | 55 |
| Jain Global Long/Short Quant | New | +13.3K | — | $1.6M | 0.0% | 54 |
| ADAR1 Capital Management Long/Short Growth | New | +3.0K | — | $356.9K | 0.0% | 53 |
| LMR Partners Event Quant | Sold Out | -463 | -100.0% | $55.1K | 0.0% | 53 |
Most significant buyers
By move score, not size.
- Integral Health Asset Management
- Perceptive Advisors
- RTW Investments
- Capital Fund Management
- Jain Global
Most significant sellers
By move score, not size.
- TWO SIGMA INVESTMENTS, LP
- ADAGE CAPITAL PARTNERS GP, L.L.C.
- Balyasny Asset Management L.P.
- LMR Partners
- Point72 Asset Management, L.P.
Hedge fund positions
| Fund | Tier | Shares | Previous | Change | Change % | Portfolio wt. | Action | Score |
|---|---|---|---|---|---|---|---|---|
| Integral Health Asset Management | 2 | 90.0K | 0 | +90.0K | — | 0.4% | New | 62 |
| Perceptive Advisors | 1 | 223.8K | 105.0K | +118.7K | +113.1% | 0.4% | Increased | 60 |
| TWO SIGMA INVESTMENTS, LP | 2 | 0 | 52.6K | -52.6K | -100.0% | 0.0% | Sold Out | 59 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2 | 0 | 8.3K | -8.3K | -100.0% | 0.0% | Sold Out | 56 |
| RTW Investments | 1 | 2.2M | 1.7M | +514.1K | +30.8% | 2.2% | Increased | 55 |
| Capital Fund Management | 3 | 10.6K | 0 | +10.6K | — | 0.0% | New | 55 |
| Balyasny Asset Management L.P. | 2 | 5.6K | 194.4K | -188.9K | -97.1% | 0.0% | Reduced | 55 |
| Jain Global | 3 | 13.3K | 0 | +13.3K | — | 0.0% | New | 54 |
| ADAR1 Capital Management | 3 | 3.0K | 0 | +3.0K | — | 0.0% | New | 53 |
| LMR Partners | 3 | 0 | 463 | -463 | -100.0% | 0.0% | Sold Out | 53 |
| Walleye Capital | 3 | 92 | 0 | +92 | — | 0.0% | New | 51 |
| Squarepoint Ops LLC | 2 | 71.9K | 6.2K | +65.7K | +1065.8% | 0.0% | Increased | 51 |
| Point72 Asset Management, L.P. | 1 | 273.2K | 599.4K | -326.2K | -54.4% | 0.1% | Reduced | 47 |
| Quantbot Technologies | 4 | 229 | 0 | +229 | — | 0.0% | New | 45 |
| Braidwell | 2 | 654.3K | 610.2K | +44.1K | +7.2% | 3.0% | Increased | 44 |
| Holocene Advisors, LP | 2 | 783.6K | 1.2M | -465.0K | -37.2% | 0.2% | Reduced | 42 |
| Schonfeld Strategic Advisors | 3 | 152.1K | 88.1K | +63.9K | +72.5% | 0.1% | Increased | 41 |
| Verition Fund Management | 2 | 56.0K | 34.6K | +21.4K | +62.0% | 0.1% | Increased | 40 |
| RENAISSANCE TECHNOLOGIES LLC | 1 | 38.5K | 53.8K | -15.3K | -28.4% | 0.0% | Reduced | 36 |
| Man Group | 3 | 43.4K | 88.2K | -44.8K | -50.8% | 0.0% | Reduced | 36 |
| MILLENNIUM MANAGEMENT LLC | 2 | 1.4M | 1.6M | -201.6K | -12.5% | 0.1% | Reduced | 34 |
| AQR Capital Management | 3 | 17.7K | 34.6K | -16.9K | -48.9% | 0.0% | Reduced | 34 |
| CITADEL ADVISORS LLC | 1 | 95.9K | 113.6K | -17.7K | -15.6% | 0.0% | Reduced | 33 |
| D. E. Shaw & Co., Inc. | 1 | 629.7K | 554.3K | +75.4K | +13.6% | 0.1% | Increased | 32 |
| Rock Springs Capital Management | 3 | 269.7K | 261.8K | +7.9K | +3.0% | 1.6% | Increased | 32 |
| Qube Research & Technologies Ltd | 2 | 271.6K | 226.9K | +44.7K | +19.7% | 0.0% | Increased | 31 |
| Brevan Howard Capital Management | 3 | 23.8K | 16.8K | +7.1K | +42.1% | 0.1% | Increased | 29 |
| Engineers Gate | 4 | 30.4K | 49.3K | -18.9K | -38.3% | 0.0% | Reduced | 29 |
| Trexquant Investment | 3 | 96.3K | 111.3K | -15.0K | -13.5% | 0.1% | Reduced | 26 |
| Capstone Investment Advisors | 3 | 2.6K | 2.5K | +24 | +0.9% | 0.0% | Increased | 22 |
| Cinctive Capital Management | 3 | 7.5K | 8.0K | -490 | -6.2% | 0.0% | Reduced | 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.