iRhythm Holdings, Inc.
IRTC- Exchange
- Nasdaq
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001388658
In the last 90 days, iRhythm Holdings, Inc. insiders filed 0 open-market purchases and 11 sales; 303 institutions reported holding it in 13F filings for Q2 2026, worth $4.24B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in iRhythm Holdings, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 305
- −24 vs. Q4 2025
- Shares held
- 35.5M
- +3.74M (+11.8%) vs. Q4 2025
- Total value
- $4.19B
- −$1.45B (−25.6%) vs. Q4 2025
- New holders
- 45
- 112 more added
- Sold out
- 69
- 105 more reduced
6 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting IRTC on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 303 | $4.24B |
| Q1 2026 | 305 | $4.19B |
| Q4 2025 | 335 | $6.24B |
| Q3 2025 | 338 | $5.97B |
| Q2 2025 | 304 | $5.44B |
| Q1 2025 | 256 | $3.77B |
| Q4 2024 | 227 | $3.09B |
| Q3 2024 | 242 | $2.55B |
| Q2 2024 | 228 | $3.82B |
| Q1 2024 | 253 | $4.00B |
| Q4 2023 | 222 | $3.53B |
| Q3 2023 | 224 | $3.12B |
| Q2 2023 | 203 | $3.47B |
| Q1 2023 | 209 | $4.18B |
| Q4 2022 | 208 | $2.92B |
| Q3 2022 | 233 | $3.81B |
| Q2 2022 | 242 | $3.28B |
| Q1 2022 | 222 | $4.78B |
| Q4 2021 | 213 | $3.43B |
| Q3 2021 | 186 | $1.64B |
| Q2 2021 | 183 | $1.93B |
| Q1 2021 | 217 | $4.33B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding iRhythm Holdings, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 2,741,505 | $323.6M | 0.01% | −72,484−2.6% | Reduced |
| Vanguard Portfolio Management LLC | 1,796,372 | $212.0M | 0.01% | +1,796,372 | New |
| RTW Investments, LP | 1,668,500 | $196.9M | 1.96% | +486,510+41.2% | Added |
| Millennium Management LLC | 1,608,014 | $189.8M | 0.14% | +781,638+94.6% | Added |
| Artisan Partners Limited Partnership | 1,450,907 | $171.2M | 0.28% | −61,085−4.0% | Reduced |
| Vanguard Capital Management LLC | 1,445,710 | $170.6M | 0.00% | +1,445,710 | New |
| FMR LLC | 1,361,919 | $160.7M | 0.01% | +733,153+116.6% | Added |
| Holocene Advisors, LP | 1,248,658 | $147.4M | 0.36% | +565,090+82.7% | Added |
| UBS Asset Management Americas Inc | 1,047,452 | $123.6M | 0.03% | +217,590+26.2% | Added |
| Geode Capital Management, LLC | 817,110 | $96.5M | 0.01% | −41,295−4.8% | Reduced |
| State Street Corp | 788,302 | $93.0M | 0.00% | +23,463+3.1% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 762,062 | $89.9M | 0.10% | +179,048+30.7% | Added |
| Eventide Asset Management, LLC | 760,825 | $89.8M | 1.48% | +68,339+9.9% | Added |
| JPMorgan Chase & Co | 714,896 | $81.6M | 0.01% | −43,691−5.8% | Reduced |
| Fuller & Thaler Asset Management, Inc. | 674,698 | $79.6M | 0.27% | +35,275+5.5% | Added |
| Blair William & Co | 628,385 | $74.2M | 0.21% | −90,412−12.6% | Reduced |
| Braidwell LP | 610,192 | $72.0M | 2.40% | +392,847+180.7% | Added |
| Point72 Asset Management, L.P. | 599,405 | $70.7M | 0.12% | +379,937+173.1% | Added |
| Arrowstreet Capital, Limited Partnership | 582,879 | $68.8M | 0.04% | −24,090−4.0% | Reduced |
| Stephens Investment Management Group LLC | 561,530 | $66.3M | 0.91% | +42,205+8.1% | Added |
| D. E. Shaw & Co., Inc. | 554,266 | $65.4M | 0.05% | +193,597+53.7% | Added |
| Capital Research Global Investors | 509,590 | $60.1M | 0.01% | −675,156−57.0% | Reduced |
| Allspring Global Investments Holdings, LLC | 467,113 | $55.2M | 0.09% | +59,704+14.7% | Added |
| Bank of America Corp | 432,539 | $51.0M | 0.00% | +77,769+21.9% | Added |
| Polar Capital Holdings Plc | 421,612 | $49.8M | 0.22% | +113,512+36.8% | Added |
| Manufacturers Life Insurance Company, The | 390,577 | $46.1M | 0.04% | +194,502+99.2% | Added |
| Mackenzie Financial Corp | 371,475 | $43.8M | 0.05% | +24,171+7.0% | Added |
| Loomis Sayles & Co L P | 367,894 | $43.4M | 0.06% | −24,183−6.2% | Reduced |
| Goldman Sachs Group Inc | 348,563 | $41.1M | 0.01% | +19,428+5.9% | Added |
| Ophir Asset Management Pty Ltd | 335,807 | $39.6M | 4.62% | +208,110+163.0% | Added |
| Invesco Ltd. | 297,452 | $35.1M | 0.00% | −200,933−40.3% | Reduced |
| Northern Trust Corp | 285,086 | $33.6M | 0.00% | +6,016+2.2% | Added |
| Charles Schwab Investment Management Inc | 281,897 | $33.3M | 0.01% | −4,227−1.5% | Reduced |
| Fred Alger Management, LLC | 280,040 | $33.1M | 0.15% | −30,542−9.8% | Reduced |
| Assenagon Asset Management S.A. | 270,221 | $31.9M | 0.05% | +45,016+20.0% | Added |
| Rock Springs Capital Management LP | 261,750 | $30.9M | 1.82% | +26,750+11.4% | Added |
| Schroder Investment Management Group | 247,746 | $28.3M | 0.02% | +85,693+52.9% | Added |
| Morgan Stanley | 237,799 | $28.1M | 0.00% | +67,808+39.9% | Added |
| Ameriprise Financial Inc | 236,786 | $27.9M | 0.01% | +113,165+91.5% | Added |
| Citigroup Inc | 232,123 | $27.4M | 0.02% | +41,788+22.0% | Added |
| Qube Research & Technologies Ltd | 226,884 | $26.8M | 0.04% | +82,270+56.9% | Added |
| Vanguard Fiduciary Trust Co | 223,699 | $26.4M | 0.01% | +223,699 | New |
| Deutsche Bank AG | 215,758 | $25.5M | 0.01% | +28,097+15.0% | Added |
| SEI Investments Co | 198,904 | $23.5M | 0.02% | −4,451−2.2% | Reduced |
| Balyasny Asset Management LLC | 194,429 | $22.9M | 0.05% | +27,155+16.2% | Added |
| Barclays PLC | 188,345 | $22.2M | 0.01% | −5,630−2.9% | Reduced |
| Bamco Inc | 183,900 | $21.7M | 0.07% | +183,900 | New |
| Next Century Growth Investors LLC | 169,306 | $20.0M | 1.45% | −3,532−2.0% | Reduced |
| First Light Asset Management, LLC | 168,116 | $19.8M | 1.78% | +14,245+9.3% | Added |
| Massachusetts Financial Services Co | 166,637 | $19.7M | 0.01% | +16,353+10.9% | Added |
| Oberweis Asset Management Inc | 156,004 | $18.4M | 0.54% | +36,304+30.3% | Added |
| Federated Hermes, Inc. | 149,459 | $17.6M | 0.03% | +43,052+40.5% | Added |
| Raymond James Financial Inc | 145,123 | $16.7M | 0.01% | −8,683−5.6% | Reduced |
| Jennison Associates LLC | 137,040 | $16.2M | 0.01% | −2,019−1.5% | Reduced |
| Franklin Resources Inc | 121,558 | $14.3M | 0.00% | +2,980+2.5% | Added |
| Citadel Advisors LLC | 113,600 | $13.4M | 0.01% | +113,600 | New |
| Jane Street Group, LLC | 112,864 | $13.3M | 0.01% | −79,527−41.3% | Reduced |
| Nuveen, LLC | 111,732 | $13.2M | 0.00% | −21,943−16.4% | Reduced |
| Trexquant Investment LP | 111,311 | $13.1M | 0.10% | +32,658+41.5% | Added |
| Bank of New York Mellon Corp | 107,789 | $12.7M | 0.00% | −4,330−3.9% | Reduced |
| Perceptive Advisors LLC | 105,026 | $12.4M | 0.24% | −2,974−2.8% | Reduced |
| WCM Investment Management, LLC | 108,078 | $12.3M | 0.03% | +34,786+47.5% | Added |
| New York State Common Retirement Fund | 102,594 | $12.1M | 0.02% | −27,138−20.9% | Reduced |
| Segall Bryant & Hamill, LLC | 99,796 | $11.8M | 0.17% | −11,901−10.7% | Reduced |
| Granahan Investment Management Inc | 96,022 | $11.3M | 0.55% | +81,645+567.9% | Added |
| UBS Group AG | 91,903 | $10.8M | 0.00% | −61,315−40.0% | Reduced |
| TimesSquare Capital Management, LLC | 90,652 | $10.7M | 0.18% | +30,830+51.5% | Added |
| Wellington Management Group LLP | 90,460 | $10.7M | 0.00% | −317,796−77.8% | Reduced |
| Man Group plc | 88,210 | $10.4M | 0.02% | +32,008+57.0% | Added |
| Schonfeld Strategic Advisors LLC | 88,133 | $10.4M | 0.08% | +76,875+682.8% | Added |
| M&G Plc | 85,062 | $10.0M | 0.05% | +924+1.1% | Added |
| C WorldWide Group Holding A/S | 80,000 | $9.44M | 0.20% | 00.0% | Unchanged |
| Susquehanna Portfolio Strategies, LLC | 75,961 | $8.96M | 0.13% | +75,961 | New |
| Thrivent Financial for Lutherans | 75,162 | $8.87M | 0.02% | +75,162 | New |
| Frontier Capital Management Co LLC | 68,454 | $8.08M | 0.08% | −2,594−3.7% | Reduced |
| Peregrine Capital Management LLC | 65,875 | $7.77M | 0.29% | +9,007+15.8% | Added |
| Swiss National Bank | 63,700 | $7.52M | 0.00% | +300+0.5% | Added |
| Silvercrest Asset Management Group LLC | 61,681 | $7.28M | 0.05% | +13,783+28.8% | Added |
| Canada Pension Plan Investment Board | 58,800 | $6.94M | 0.00% | +28,700+95.3% | Added |
| Alliancebernstein L.P. | 36,299 | $6.44M | 0.00% | −1,190−3.2% | Reduced |
| Renaissance Technologies LLC | 53,800 | $6.35M | 0.01% | −50,100−48.2% | Reduced |
| Principal Financial Group Inc | 53,476 | $6.31M | 0.00% | −15,945−23.0% | Reduced |
| HealthInvest Partners AB | 22,322 | $6.26M | 2.02% | −15,257−40.6% | Reduced |
| Two Sigma Investments, LP | 52,600 | $6.21M | 0.01% | +52,600 | New |
| Legal & General Group Plc | 51,569 | $6.09M | 0.00% | −501−1.0% | Reduced |
| Amundi | 49,575 | $5.85M | 0.00% | +16,165+48.4% | Added |
| Engineers Gate Manager LP | 49,269 | $5.81M | 0.07% | −27,850−36.1% | Reduced |
| State of Wisconsin Investment Board | 48,050 | $5.67M | 0.01% | −3,103−6.1% | Reduced |
| First Trust Advisors LP | 47,589 | $5.62M | 0.00% | −13,213−21.7% | Reduced |
| Jump Financial, LLC | 44,984 | $5.31M | 0.08% | +24,454+119.1% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 42,346 | $5.00M | 0.01% | +228+0.5% | Added |
| Campbell & CO Investment Adviser LLC | 40,818 | $4.82M | 0.27% | +40,818 | New |
| Parkman Healthcare Partners LLC | 40,125 | $4.74M | 0.49% | +40,125 | New |
| Rhumbline Advisers | 39,422 | $4.65M | 0.00% | −1,188−2.9% | Reduced |
| California State Teachers Retirement System | 37,324 | $4.40M | 0.00% | +6,763+22.1% | Added |
| Price T Rowe Associates Inc | 35,687 | $4.21M | 0.00% | −466,433−92.9% | Reduced |
| Hillsdale Investment Management Inc. | 34,950 | $4.12M | 0.11% | +900+2.6% | Added |
| Sirios Capital Management L P | 34,744 | $4.10M | 0.50% | +34,744 | New |
| AQR Capital Management LLC | 34,590 | $4.08M | 0.00% | −5,575−13.9% | Reduced |
| Verition Fund Management LLC | 34,565 | $4.08M | 0.04% | +14,965+76.4% | Added |