Security record · archived quarter
IRTC
iRhythm Technologies, Inc. · Healthcare · Medical - Devices
112Tracked holders
+1Δ holders
25.32MShares held
$2.99BReported value
+11New positions
−11Exits
Momentum inputs (comparable managers):
holder breadth +0.9% ·
share flow +7.1% ·
net new positions 0.0%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
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 · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 2.74M | -2.6% | $323.55M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 18 | Millennium Management ✦ | 1.61M | +94.6% | $189.78M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 19 | Artisan Partners Limited Partnership | 1.45M | -4.0% | $171.24M | 0.3% | ▼ Trim | 2 | SEC ↗ |
| 20 | Vanguard Capital Management Llc | 1.45M | — | $170.62M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | Fidelity (FMR) ✦ | 1.36M | +116.6% | $160.73M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 22 | Fidelity (FMR) ✦ | 1.36M | +116.6% | $160.73M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 23 | Fidelity (FMR) ✦ | 1.36M | +116.6% | $160.73M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 24 | Fidelity (FMR) ✦ | 1.36M | +116.6% | $160.73M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 25 | Holocene Advisors, LP | 1.25M | +82.7% | $147.37M | 0.4% | ▲ Add | 2 | SEC ↗ |
| 26 | UBS AM, a distinct business unit of… | 1.05M | +26.2% | $123.62M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 27 | UBS AM, a distinct business unit of… | 1.05M | +26.2% | $123.62M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 28 | UBS AM, a distinct business unit of… | 1.05M | +26.2% | $123.62M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 29 | UBS AM, a distinct business unit of… | 1.05M | +26.2% | $123.62M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 30 | UBS AM, a distinct business unit of… | 1.05M | +26.2% | $123.62M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 31 | UBS AM, a distinct business unit of… | 1.05M | +26.2% | $123.62M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 32 | UBS AM, a distinct business unit of… | 1.05M | +26.2% | $123.62M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 33 | UBS AM, a distinct business unit of… | 1.05M | +26.2% | $123.62M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 34 | UBS AM, a distinct business unit of… | 1.05M | +26.2% | $123.62M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | Geode Capital Management ✦ (passive) | 817.11K | -4.8% | $96.45M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 36 | Geode Capital Management ✦ (passive) | 817.11K | -4.8% | $96.45M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 37 | State Street Global Advisors ✦ (passive) | 788.30K | +3.1% | $93.04M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 38 | BNP Paribas Asset Management… | 762.06K | +30.7% | $89.94M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 39 | BNP Paribas Asset Management… | 762.06K | +30.7% | $89.94M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 40 | JPMorgan Chase ✦ | 714.90K | -5.8% | $81.65M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 41 | JPMorgan Chase ✦ | 714.90K | -5.8% | $81.65M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 42 | JPMorgan Chase ✦ | 714.90K | -5.8% | $81.65M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 43 | JPMorgan Chase ✦ | 714.90K | -5.8% | $81.65M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 44 | JPMorgan Chase ✦ | 714.90K | -5.8% | $81.65M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 45 | JPMorgan Chase ✦ | 714.90K | -5.8% | $81.65M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 46 | JPMorgan Chase ✦ | 714.90K | -5.8% | $81.65M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 47 | Blair William & Co/Il | 628.38K | -12.6% | $74.16M | 0.2% | ▼ Trim | 2 | SEC ↗ |
| 48 | Point72 Asset Management ✦ | 599.40K | +173.1% | $70.74M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 49 | Arrowstreet Capital ✦ | 582.88K | -4.0% | $68.79M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 50 | D. E. Shaw & Co. ✦ | 554.27K | +53.7% | $65.41M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 51 | Capital Research Global Investors | 509.59K | -57.0% | $60.14M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 52 | Allspring Global Investments… | 467.11K | +14.7% | $55.22M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 53 | Allspring Global Investments… | 467.11K | +14.7% | $55.22M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 54 | Allspring Global Investments… | 467.11K | +14.7% | $55.22M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 55 | Bank Of America Corp /De/ | 432.54K | +21.9% | $51.05M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 56 | Bank Of America Corp /De/ | 432.54K | +21.9% | $51.05M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 57 | Bank Of America Corp /De/ | 432.54K | +21.9% | $51.05M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 58 | Bank Of America Corp /De/ | 432.54K | +21.9% | $51.05M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 59 | Bank Of America Corp /De/ | 432.54K | +21.9% | $51.05M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 60 | Manufacturers Life Insurance… | 390.58K | +99.2% | $46.10M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 61 | Mackenzie Financial Corp | 371.48K | +7.0% | $43.84M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 62 | Loomis Sayles & Co L P | 367.89K | -6.2% | $43.42M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 63 | Loomis Sayles & Co L P | 367.89K | -6.2% | $43.42M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 64 | Goldman Sachs Group ✦ | 348.56K | +5.9% | $41.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 65 | Goldman Sachs Group ✦ | 348.56K | +5.9% | $41.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 66 | Goldman Sachs Group ✦ | 348.56K | +5.9% | $41.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 67 | Invesco Ltd. | 297.45K | -40.3% | $35.11M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 68 | Invesco Ltd. | 297.45K | -40.3% | $35.11M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 69 | Invesco Ltd. | 297.45K | -40.3% | $35.11M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 70 | Invesco Ltd. | 297.45K | -40.3% | $35.11M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 71 | Invesco Ltd. | 297.45K | -40.3% | $35.11M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 72 | Invesco Ltd. | 297.45K | -40.3% | $35.11M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 73 | Invesco Ltd. | 297.45K | -40.3% | $35.11M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 74 | Northern Trust Corp | 285.09K | +2.2% | $33.65M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 75 | Northern Trust Corp | 285.09K | +2.2% | $33.65M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 76 | Northern Trust Corp | 285.09K | +2.2% | $33.65M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 77 | Northern Trust Corp | 285.09K | +2.2% | $33.65M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 78 | Northern Trust Corp | 285.09K | +2.2% | $33.65M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 79 | Charles Schwab Investment… | 281.90K | -1.5% | $33.27M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 80 | Assenagon Asset Management S.A. | 270.22K | +20.0% | $31.89M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 81 | Schroder Investment Management Group | 247.75K | — | $28.30M | 0.0% | n/c | 1 | SEC ↗ |
| 82 | Morgan Stanley ✦ | 237.80K | +39.9% | $28.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 83 | Morgan Stanley ✦ | 237.80K | +39.9% | $28.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 84 | Morgan Stanley ✦ | 237.80K | +39.9% | $28.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 85 | Morgan Stanley ✦ | 237.80K | +39.9% | $28.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 86 | Morgan Stanley ✦ | 237.80K | +39.9% | $28.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 87 | Morgan Stanley ✦ | 237.80K | +39.9% | $28.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 88 | Morgan Stanley ✦ | 237.80K | +39.9% | $28.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 89 | Morgan Stanley ✦ | 237.80K | +39.9% | $28.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 90 | Ameriprise Financial Inc | 236.79K | +91.5% | $27.95M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 91 | Ameriprise Financial Inc | 236.79K | +91.5% | $27.95M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 92 | Ameriprise Financial Inc | 236.79K | +91.5% | $27.95M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 93 | Citigroup Inc | 232.12K | +21.9% | $27.40M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 94 | Citigroup Inc | 232.12K | +21.9% | $27.40M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 95 | Qube Research & Technologies Ltd | 226.88K | +56.9% | $26.78M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 96 | Deutsche Bank Ag\ | 215.76K | +15.0% | $25.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 97 | Deutsche Bank Ag\ | 215.76K | +15.0% | $25.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 98 | Deutsche Bank Ag\ | 215.76K | +15.0% | $25.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 99 | Deutsche Bank Ag\ | 215.76K | +15.0% | $25.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 100 | Sei Investments Co | 198.90K | -2.2% | $23.47M | 0.0% | ▼ Trim | 2 | 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
| Norges Bank | $9.98M | was 0.0% |
| Hsbc Holdings Plc | $6.09M | was 0.0% |
| Bridgewater Associates | $2.01M | was 0.0% |
| Baird Financial Group, Inc. | $1.15M | was 0.0% |
| Marshall Wace | $632,396 | was 0.0% |
| Mariner, LLC | $527,628 | was 0.0% |
| Sumitomo Mitsui Trust Group… | $416,984 | was 0.0% |
| Gotham Asset Management | $357,896 | was 0.0% |
| Bank Of Montreal /Can/ | $262,967 | was 0.0% |
| Lazard Asset Management Llc | $74,347 | was 0.0% |
| Danske Bank A/S | $17,744 | 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: Q1 2026 ·
Methodology ·
Get this via the API