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 |
|---|---|---|---|---|---|---|
| Q3 2026 | 2 | 0 | 20.77K | $2.36M | n/a | n/a |
| 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 |
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 ↗ ×17 |
| 2 | Millennium Management ✦ | 1.61M | +94.6% | $189.78M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 3 | Artisan Partners Limited Partnership | 1.45M | -4.0% | $171.24M | 0.3% | ▼ Trim | 2 | SEC ↗ |
| 4 | Vanguard Capital Management Llc | 1.45M | n/a | $170.62M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | Fidelity (FMR) ✦ | 1.36M | +116.6% | $160.73M | 0.0% | ▲ Add | 4 | SEC ↗ ×4 |
| 6 | Holocene Advisors, LP | 1.25M | +82.7% | $147.37M | 0.4% | ▲ Add | 2 | SEC ↗ |
| 7 | UBS AM, a distinct business unit of… | 1.05M | +26.2% | $123.62M | 0.0% | ▲ Add | 2 | SEC ↗ ×9 |
| 8 | Geode Capital Management ✦ (passive) | 817.11K | -4.8% | $96.45M | 0.0% | ▼ Trim | 8 | SEC ↗ ×2 |
| 9 | State Street Global Advisors ✦ (passive) | 788.30K | +3.1% | $93.04M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 10 | BNP Paribas Asset Management… | 762.06K | +30.7% | $89.94M | 0.1% | ▲ Add | 2 | SEC ↗ ×2 |
| 11 | JPMorgan Chase ✦ | 714.90K | -5.8% | $81.65M | 0.0% | ▼ Trim | 3 | SEC ↗ ×7 |
| 12 | Blair William & Co/Il | 628.38K | -12.6% | $74.16M | 0.2% | ▼ Trim | 2 | SEC ↗ |
| 13 | Point72 Asset Management ✦ | 599.40K | +173.1% | $70.74M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 14 | Arrowstreet Capital ✦ | 582.88K | -4.0% | $68.79M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 15 | D. E. Shaw & Co. ✦ | 554.27K | +53.7% | $65.41M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 16 | Capital Research Global Investors | 509.59K | -57.0% | $60.14M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 17 | Allspring Global Investments… | 467.11K | +14.7% | $55.22M | 0.1% | ▲ Add | 2 | SEC ↗ ×3 |
| 18 | Bank Of America Corp /De/ | 432.54K | +21.9% | $51.05M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 19 | Manufacturers Life Insurance… | 390.58K | +99.2% | $46.10M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | Mackenzie Financial Corp | 371.48K | +7.0% | $43.84M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 21 | Loomis Sayles & Co L P | 367.89K | -6.2% | $43.42M | 0.1% | ▼ Trim | 2 | SEC ↗ ×2 |
| 22 | Goldman Sachs Group ✦ | 348.56K | +5.9% | $41.14M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 23 | Invesco Ltd. | 297.45K | -40.3% | $35.11M | 0.0% | ▼ Trim | 2 | SEC ↗ ×7 |
| 24 | Northern Trust Corp | 285.09K | +2.2% | $33.65M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 25 | Charles Schwab Investment… | 281.90K | -1.5% | $33.27M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 26 | Assenagon Asset Management S.A. | 270.22K | +20.0% | $31.89M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 27 | Schroder Investment Management Group | 247.75K | n/a | $28.30M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | Morgan Stanley ✦ | 237.80K | +39.9% | $28.07M | 0.0% | ▲ Add | 3 | SEC ↗ ×8 |
| 29 | Ameriprise Financial Inc | 236.79K | +91.5% | $27.95M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 30 | Citigroup Inc | 232.12K | +21.9% | $27.40M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 31 | Qube Research & Technologies Ltd | 226.88K | +56.9% | $26.78M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 32 | Deutsche Bank Ag\ | 215.76K | +15.0% | $25.46M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 33 | Sei Investments Co | 198.90K | -2.2% | $23.47M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 34 | Balyasny Asset Management L.P. | 194.43K | +16.2% | $22.95M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | Barclays Plc | 188.34K | -2.9% | $22.23M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 36 | Bamco Inc /Ny/ | 183.90K | New | $21.70M | 0.1% | New | 1 | SEC ↗ |
| 37 | Massachusetts Financial Services Co… | 166.64K | +10.9% | $19.67M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 38 | Federated Hermes, Inc. | 149.46K | +40.5% | $17.64M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 39 | Raymond James Financial Inc | 145.12K | -5.7% | $16.69M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 40 | Jennison Associates Llc | 137.04K | -1.4% | $16.17M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 41 | Franklin Resources Inc | 121.56K | +2.5% | $14.35M | 0.0% | ▲ Add | 2 | SEC ↗ ×7 |
| 42 | Citadel Advisors ✦ | 113.60K | New | $13.41M | 0.0% | New | 1 | SEC ↗ ×2 |
| 43 | Jane Street Group, Llc | 112.86K | -41.3% | $13.32M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 44 | Nuveen, LLC | 111.73K | -16.4% | $13.19M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 45 | Bank of New York Mellon Corp | 107.79K | -3.9% | $12.72M | 0.0% | ▼ Trim | 2 | SEC ↗ ×9 |
| 46 | Wcm Investment Management, Llc | 108.08K | +47.5% | $12.34M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 47 | New York State Common Retirement… | 102.59K | -20.9% | $12.11M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 48 | UBS Group AG | 91.90K | -40.0% | $10.85M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 49 | Wellington Management ✦ | 90.46K | -77.8% | $10.68M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 50 | Man Group plc | 88.21K | +57.0% | $10.41M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 51 | Swiss National Bank | 63.70K | +0.5% | $7.52M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 52 | Canada Pension Plan Investment Board | 58.80K | +95.3% | $6.94M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 53 | Alliancebernstein L.P. | 36.30K | -3.2% | $6.44M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 54 | Renaissance Technologies ✦ | 53.80K | -48.2% | $6.35M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 55 | Principal Financial Group Inc | 53.48K | -23.0% | $6.31M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 56 | Two Sigma Investments ✦ | 52.60K | New | $6.21M | 0.0% | New | 1 | SEC ↗ |
| 57 | Legal & General Group Plc | 51.57K | -1.0% | $6.09M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 58 | Amundi | 49.58K | +48.4% | $5.85M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 59 | State Of Wisconsin Investment Board | 48.05K | -6.1% | $5.67M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 60 | First Trust Advisors Lp | 47.59K | -21.7% | $5.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 61 | Connor, Clark & Lunn Investment… | 42.35K | +0.5% | $5.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 62 | Rhumbline Advisers | 39.42K | -2.9% | $4.65M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 63 | California State Teachers… | 37.32K | +22.1% | $4.40M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 64 | T. Rowe Price ✦ | 35.69K | -92.9% | $4.21M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 65 | AQR Capital Management ✦ | 34.59K | -13.9% | $4.08M | 0.0% | ▼ Trim | 6 | SEC ↗ ×8 |
| 66 | Envestnet Asset Management Inc | 32.13K | +38.5% | $3.79M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 67 | Ensign Peak Advisors, Inc | 29.96K | -11.7% | $3.54M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 68 | Wells Fargo & Company/Mn | 26.90K | -40.6% | $3.17M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 69 | Susquehanna International Group, Llp | 24.15K | +407.5% | $2.85M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 70 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 23.27K | -9.8% | $2.75M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 71 | Victory Capital Management Inc | 22.17K | -48.7% | $2.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 72 | Nomura Asset Management… | 21.24K | -46.6% | $2.51M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 73 | Bnp Paribas Financial Markets | 19.99K | -72.8% | $2.36M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 74 | Quantinno Capital Management LP | 18.62K | +1172.8% | $2.20M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 75 | Prudential Financial Inc | 17.11K | -57.7% | $2.02M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 76 | Russell Investments Group, Ltd. | 16.08K | -46.4% | $1.90M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 77 | Creative Planning | 15.84K | +11.9% | $1.87M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 78 | Fifth Third Bancorp | 15.45K | +17068.9% | $1.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 79 | Universal- Beteiligungs- und… | 15.43K | -60.0% | $1.82M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 80 | Corient Private Wealth LP | 15.34K | +769.8% | $1.81M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 81 | Janus Henderson Group Plc | 13.86K | 0.0% | $1.64M | 0.0% | Held | 2 | SEC ↗ |
| 82 | Royal Bank Of Canada | 11.73K | -2.1% | $1.38M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 83 | Zurcher Kantonalbank (Zurich… | 11.39K | +25.9% | $1.34M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 84 | State Board Of Administration Of… | 8.58K | 0.0% | $1.01M | 0.0% | Held | 2 | SEC ↗ |
| 85 | Adage Capital Partners ✦ | 8.29K | -93.4% | $978,268 | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 86 | Captrust Financial Advisors | 6.27K | +8.1% | $739,982 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 87 | Jones Financial Companies Lllp | 6.23K | +2234.8% | $736,235 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 88 | Squarepoint Ops LLC | 6.16K | -93.4% | $727,475 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 89 | CIBC Bancorp USA Inc. | 5.78K | n/a | $681,802 | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 90 | Pictet Asset Management Holding SA | 5.49K | +11.8% | $648,166 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 91 | Voya Investment Management Llc | 5.49K | -42.0% | $648,166 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 92 | ProShare Advisors LLC | 4.74K | -20.3% | $559,061 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 93 | LPL Financial LLC | 3.69K | +12.5% | $434,904 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 94 | Mitsubishi UFJ Asset Management… | 2.80K | +1.8% | $330,220 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 95 | Truist Financial Corp | 2.71K | -24.7% | $319,716 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 96 | Capstone Investment Advisors, Llc | 2.54K | New | $299,181 | 0.0% | New | 1 | SEC ↗ |
| 97 | Allianz Asset Management GmbH | 1.90K | -24.0% | $224,238 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 98 | Neuberger Berman Group LLC | 1.84K | -94.1% | $217,157 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 99 | Hrt Financial Lp | 1.77K | New | $209,000 | 0.0% | New | 1 | SEC ↗ |
| 100 | Group One Trading Llc | 1.75K | New | $206,417 | 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
| Bamco Inc /Ny/ | $21.70M | 0.1% |
| Citadel Advisors | $13.41M | 0.0% |
| Two Sigma Investments | $6.21M | 0.0% |
| Capstone Investment Advisors… | $299,181 | 0.0% |
| Hrt Financial Lp | $209,000 | 0.0% |
| Group One Trading Llc | $206,417 | 0.0% |
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
Oct 13
SC 13G/A: MILLENNIUM MANAGEMENT LLC
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 ·
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