Security record · archived quarter
IRTC
iRhythm Technologies, Inc. · Healthcare · Medical - Devices
110Tracked holders
-1Δ holders
25.32MShares held
$4.49BReported value
+2New positions
−2Exits
Momentum inputs (comparable managers):
holder breadth -0.9% ·
share flow +2.5% ·
net new positions 0.0%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 105 | -5 | 23.67M | $2.82B | +4 | −8 |
| 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 | — |
| Q2 2025 | 17 | +4 | 9.71M | $1.50B | +4 | — |
| 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 | — | 2.43M | $261.78M | — | — |
Who holds it · Q4 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 3.31M | +2.2% | $587.42M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 2 | The Vanguard Group ✦ (passive) | 3.31M | +2.2% | $587.42M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 3 | The Vanguard Group ✦ (passive) | 3.31M | +2.2% | $587.42M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 4 | The Vanguard Group ✦ (passive) | 3.31M | +2.2% | $587.42M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 5 | The Vanguard Group ✦ (passive) | 3.31M | +2.2% | $587.42M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 19 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 20 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 21 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 22 | BlackRock ✦ (passive) | 2.81M | -2.1% | $499.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 23 | Artisan Partners Limited Partnership | 1.51M | — | $268.29M | 0.4% | n/c | 1 | SEC ↗ |
| 24 | Capital Research Global Investors | 1.18M | — | $210.22M | 0.0% | n/c | 1 | SEC ↗ |
| 25 | Geode Capital Management ✦ (passive) | 858.40K | +8.6% | $152.34M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 26 | Geode Capital Management ✦ (passive) | 858.40K | +8.6% | $152.34M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 27 | UBS AM, a distinct business unit of… | 829.86K | — | $147.25M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | UBS AM, a distinct business unit of… | 829.86K | — | $147.25M | 0.0% | n/c | 1 | SEC ↗ |
| 29 | UBS AM, a distinct business unit of… | 829.86K | — | $147.25M | 0.0% | n/c | 1 | SEC ↗ |
| 30 | UBS AM, a distinct business unit of… | 829.86K | — | $147.25M | 0.0% | n/c | 1 | SEC ↗ |
| 31 | UBS AM, a distinct business unit of… | 829.86K | — | $147.25M | 0.0% | n/c | 1 | SEC ↗ |
| 32 | UBS AM, a distinct business unit of… | 829.86K | — | $147.25M | 0.0% | n/c | 1 | SEC ↗ |
| 33 | UBS AM, a distinct business unit of… | 829.86K | — | $147.25M | 0.0% | n/c | 1 | SEC ↗ |
| 34 | UBS AM, a distinct business unit of… | 829.86K | — | $147.25M | 0.0% | n/c | 1 | SEC ↗ |
| 35 | UBS AM, a distinct business unit of… | 829.86K | — | $147.25M | 0.0% | n/c | 1 | SEC ↗ |
| 36 | Millennium Management ✦ | 826.38K | +197.4% | $146.63M | 0.1% | ▲ Add | 7 | SEC ↗ |
| 37 | State Street Global Advisors ✦ (passive) | 764.84K | -9.8% | $135.71M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 38 | JPMorgan Chase ✦ | 758.59K | -13.7% | $134.60M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 39 | JPMorgan Chase ✦ | 758.59K | -13.7% | $134.60M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 40 | JPMorgan Chase ✦ | 758.59K | -13.7% | $134.60M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 41 | JPMorgan Chase ✦ | 758.59K | -13.7% | $134.60M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 42 | JPMorgan Chase ✦ | 758.59K | -13.7% | $134.60M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 43 | JPMorgan Chase ✦ | 758.59K | -13.7% | $134.60M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 44 | Blair William & Co/Il | 718.80K | — | $127.54M | 0.3% | n/c | 1 | SEC ↗ |
| 45 | Holocene Advisors, LP | 683.57K | — | $121.29M | 0.3% | n/c | 1 | SEC ↗ |
| 46 | Fidelity (FMR) ✦ | 628.77K | +0.8% | $111.57M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 47 | Fidelity (FMR) ✦ | 628.77K | +0.8% | $111.57M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 48 | Fidelity (FMR) ✦ | 628.77K | +0.8% | $111.57M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 49 | Fidelity (FMR) ✦ | 628.77K | +0.8% | $111.57M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 50 | Arrowstreet Capital ✦ | 606.97K | +12.2% | $107.70M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 51 | BNP Paribas Asset Management… | 583.01K | — | $103.45M | 0.1% | n/c | 1 | SEC ↗ |
| 52 | BNP Paribas Asset Management… | 583.01K | — | $103.45M | 0.1% | n/c | 1 | SEC ↗ |
| 53 | T. Rowe Price ✦ | 502.12K | +47.8% | $89.10M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 54 | T. Rowe Price ✦ | 502.12K | +47.8% | $89.10M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 55 | Invesco Ltd. | 498.38K | — | $88.43M | 0.0% | n/c | 1 | SEC ↗ |
| 56 | Invesco Ltd. | 498.38K | — | $88.43M | 0.0% | n/c | 1 | SEC ↗ |
| 57 | Invesco Ltd. | 498.38K | — | $88.43M | 0.0% | n/c | 1 | SEC ↗ |
| 58 | Invesco Ltd. | 498.38K | — | $88.43M | 0.0% | n/c | 1 | SEC ↗ |
| 59 | Invesco Ltd. | 498.38K | — | $88.43M | 0.0% | n/c | 1 | SEC ↗ |
| 60 | Invesco Ltd. | 498.38K | — | $88.43M | 0.0% | n/c | 1 | SEC ↗ |
| 61 | Invesco Ltd. | 498.38K | — | $88.43M | 0.0% | n/c | 1 | SEC ↗ |
| 62 | Wellington Management ✦ | 408.26K | -3.4% | $72.44M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 63 | Wellington Management ✦ | 408.26K | -3.4% | $72.44M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 64 | Wellington Management ✦ | 408.26K | -3.4% | $72.44M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 65 | Wellington Management ✦ | 408.26K | -3.4% | $72.44M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 66 | Allspring Global Investments… | 407.41K | — | $71.39M | 0.1% | n/c | 1 | SEC ↗ |
| 67 | Allspring Global Investments… | 407.41K | — | $71.39M | 0.1% | n/c | 1 | SEC ↗ |
| 68 | Allspring Global Investments… | 407.41K | — | $71.39M | 0.1% | n/c | 1 | SEC ↗ |
| 69 | Loomis Sayles & Co L P | 392.08K | — | $69.57M | 0.1% | n/c | 1 | SEC ↗ |
| 70 | Loomis Sayles & Co L P | 392.08K | — | $69.57M | 0.1% | n/c | 1 | SEC ↗ |
| 71 | D. E. Shaw & Co. ✦ | 360.67K | +7.0% | $64.00M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 72 | Bank Of America Corp /De/ | 354.77K | — | $62.95M | 0.0% | n/c | 1 | SEC ↗ |
| 73 | Bank Of America Corp /De/ | 354.77K | — | $62.95M | 0.0% | n/c | 1 | SEC ↗ |
| 74 | Bank Of America Corp /De/ | 354.77K | — | $62.95M | 0.0% | n/c | 1 | SEC ↗ |
| 75 | Bank Of America Corp /De/ | 354.77K | — | $62.95M | 0.0% | n/c | 1 | SEC ↗ |
| 76 | Bank Of America Corp /De/ | 354.77K | — | $62.95M | 0.0% | n/c | 1 | SEC ↗ |
| 77 | Bank Of America Corp /De/ | 354.77K | — | $62.95M | 0.0% | n/c | 1 | SEC ↗ |
| 78 | Bank Of America Corp /De/ | 354.77K | — | $62.95M | 0.0% | n/c | 1 | SEC ↗ |
| 79 | Mackenzie Financial Corp | 347.30K | — | $61.90M | 0.1% | n/c | 1 | SEC ↗ |
| 80 | Goldman Sachs Group ✦ | 329.13K | +1.8% | $58.40M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 81 | Goldman Sachs Group ✦ | 329.13K | +1.8% | $58.40M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 82 | Goldman Sachs Group ✦ | 329.13K | +1.8% | $58.40M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 83 | Goldman Sachs Group ✦ | 329.13K | +1.8% | $58.40M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 84 | Charles Schwab Investment… | 286.12K | — | $50.77M | 0.0% | n/c | 1 | SEC ↗ |
| 85 | Northern Trust Corp | 279.07K | — | $49.52M | 0.0% | n/c | 1 | SEC ↗ |
| 86 | Northern Trust Corp | 279.07K | — | $49.52M | 0.0% | n/c | 1 | SEC ↗ |
| 87 | Northern Trust Corp | 279.07K | — | $49.52M | 0.0% | n/c | 1 | SEC ↗ |
| 88 | Northern Trust Corp | 279.07K | — | $49.52M | 0.0% | n/c | 1 | SEC ↗ |
| 89 | Northern Trust Corp | 279.07K | — | $49.52M | 0.0% | n/c | 1 | SEC ↗ |
| 90 | Northern Trust Corp | 279.07K | — | $49.52M | 0.0% | n/c | 1 | SEC ↗ |
| 91 | Assenagon Asset Management S.A. | 225.21K | — | $39.96M | 0.1% | n/c | 1 | SEC ↗ |
| 92 | Point72 Asset Management ✦ | 219.47K | -37.0% | $38.94M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 93 | Sei Investments Co | 203.35K | — | $36.08M | 0.0% | n/c | 1 | SEC ↗ |
| 94 | Sei Investments Co | 203.35K | — | $36.08M | 0.0% | n/c | 1 | SEC ↗ |
| 95 | Sei Investments Co | 203.35K | — | $36.08M | 0.0% | n/c | 1 | SEC ↗ |
| 96 | Manufacturers Life Insurance… | 196.07K | — | $34.79M | 0.0% | n/c | 1 | SEC ↗ |
| 97 | Barclays Plc | 193.97K | — | $34.42M | 0.0% | n/c | 1 | SEC ↗ |
| 98 | Barclays Plc | 193.97K | — | $34.42M | 0.0% | n/c | 1 | SEC ↗ |
| 99 | Barclays Plc | 193.97K | — | $34.42M | 0.0% | n/c | 1 | SEC ↗ |
| 100 | Barclays Plc | 193.97K | — | $34.42M | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Citadel Advisors | $1.53M | was 0.0% |
| Two Sigma Investments | $361,179 | was 0.0% |
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.
Frequently co-owned
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)
Aug 10
Blackford Quentin S.
Officer, Director · 26.86K sh · $3.35M
Aug 10
Murphy Patrick Michael
Officer · 7.09K sh · $884,156
Aug 10
Patterson Chad
Officer · 7.09K sh · $884,170
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Aug 14
SC 13G/A — RTW INVESTMENTS, LP
Aug 13
SC 13G — Artisan Partners Limited Partnership
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q4 2025 ·
Methodology ·
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