IRTC
iRhythm Technologies, Inc. · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth +30.0% ·
share flow +5.4% ·
net new positions +20.0%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 103 | -6 | 23.61M | $2.81B | +4 | −10 |
| Q1 2026 | 112 | +1 | 25.32M | $2.99B | +11 | −11 |
| Q4 2025 | 110 | -1 | 25.32M | $4.49B | +2 | −2 |
| Q3 2025 | 21 | +1 | 12.24M | $2.10B | +1 | n/a |
| Q2 2025 | 17 | +4 | 9.71M | $1.50B | +4 | n/a |
| Q1 2025 | 10 | +1 | 2.81M | $294.19M | +2 | −1 |
| Q4 2024 | 9 | -1 | 2.41M | $217.31M | +2 | −3 |
| Q3 2024 | 9 | +1 | 1.67M | $124.10M | +2 | −1 |
| Q2 2024 | 8 | n/a | 2.43M | $261.78M | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 3.24M | n/a | $498.16M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 2 | BlackRock ✦ (passive) | 2.75M | n/a | $423.33M | 0.0% | n/c | 1 | SEC ↗ ×16 |
| 3 | State Street Global Advisors ✦ (passive) | 868.52K | -5.4% | $133.72M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 4 | Geode Capital Management ✦ (passive) | 767.34K | +2.3% | $118.15M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 5 | Fidelity (FMR) ✦ | 420.20K | n/a | $64.69M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 6 | Wellington Management ✦ | 395.32K | +138.7% | $60.86M | 0.0% | ▲ Add | 5 | SEC ↗ ×4 |
| 7 | Millennium Management ✦ | 336.31K | -15.9% | $51.78M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 8 | Point72 Asset Management ✦ | 322.10K | -23.4% | $49.59M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 9 | D. E. Shaw & Co. ✦ | 247.84K | New | $38.16M | 0.0% | New | 1 | SEC ↗ |
| 10 | Renaissance Technologies ✦ | 141.20K | +538.9% | $21.74M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 11 | Citadel Advisors ✦ | 100.02K | +3124.5% | $15.40M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 12 | Adage Capital Partners ✦ | 75.00K | -25.0% | $11.55M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 13 | T. Rowe Price ✦ | 26.25K | +14.6% | $4.04M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 14 | Arrowstreet Capital ✦ | 8.30K | New | $1.28M | 0.0% | New | 1 | SEC ↗ |
| 15 | Gotham Asset Management ✦ | 7.98K | New | $1.23M | 0.0% | New | 1 | SEC ↗ |
| 16 | AQR Capital Management ✦ | 6.99K | -15.9% | $1.08M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 17 | Two Sigma Investments ✦ | 1.90K | New | $292,524 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| D. E. Shaw & Co. | $38.16M | 0.0% |
| Arrowstreet Capital | $1.28M | 0.0% |
| Gotham Asset Management | $1.23M | 0.0% |
| Two Sigma Investments | $292,524 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 300 holders, 34.72M shares, $4.07B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer, Director · 26.86K sh · $3.35M
Officer · 7.09K sh · $884,156
Officer · 7.09K sh · $884,170
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology