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 |
|---|---|---|---|---|---|
| Artisan Partners Limited Partnership | 1,450,907 | $171.2M | 0.28% | −61,085−4.0% | Reduced |
| Millennium Management LLC | 1,608,014 | $189.8M | 0.14% | +781,638+94.6% | Added |
| RTW Investments, LP | 1,668,500 | $196.9M | 1.96% | +486,510+41.2% | Added |
| Vanguard Portfolio Management LLC | 1,796,372 | $212.0M | 0.01% | +1,796,372 | New |
| BlackRock, Inc. | 2,741,505 | $323.6M | 0.01% | −72,484−2.6% | Reduced |
| Sands Capital Management, LLC | 0 | $0 | 0.00% | −1,699,645−100.0% | Sold out |
| Westfield Capital Management Co LP | 0 | $0 | 0.00% | −325,063−100.0% | Sold out |
| Lord, Abbett & Co. LLC | 0 | $0 | 0.00% | −277,212−100.0% | Sold out |
| Driehaus Capital Management LLC | 0 | $0 | 0.00% | −267,968−100.0% | Sold out |
| Integral Health Asset Management, LLC | 0 | $0 | 0.00% | −130,000−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −127,596−100.0% | Sold out |
| Freestone Grove Partners LP | 0 | $0 | 0.00% | −63,140−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −54,844−100.0% | Sold out |
| Steadfast Capital Management LP | 0 | $0 | 0.00% | −41,000−100.0% | Sold out |
| EAM Investors, LLC | 0 | $0 | 0.00% | −37,092−100.0% | Sold out |
| Cookson Peirce & Co Inc | 0 | $0 | 0.00% | −19,549−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −17,024−100.0% | Sold out |
| Lisanti Capital Growth, LLC | 0 | $0 | 0.00% | −16,995−100.0% | Sold out |
| Occudo Quantitative Strategies LP | 0 | $0 | 0.00% | −16,484−100.0% | Sold out |
| Williamson Legacy Group, LLC | 0 | $0 | 0.00% | −12,348−100.0% | Sold out |
| Deerfield Management Company, L.P. (Series C) | 0 | $0 | 0.00% | −12,099−100.0% | Sold out |
| Bridgewater Associates, LP | 0 | $0 | 0.00% | −11,348−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −8,548−100.0% | Sold out |
| Rhenman & Partners Asset Management AB | 0 | $0 | 0.00% | −7,000−100.0% | Sold out |
| Laird Norton Trust Company, LLC | 0 | $0 | 0.00% | −6,824−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −6,646−100.0% | Sold out |
| Baird Financial Group, Inc. | 0 | $0 | 0.00% | −6,503−100.0% | Sold out |
| Virtue Capital Management, LLC | 0 | $0 | 0.00% | −5,349−100.0% | Sold out |
| Steel Peak Wealth Management LLC | 0 | $0 | 0.00% | −5,224−100.0% | Sold out |
| Legato Capital Management LLC | 0 | $0 | 0.00% | −4,665−100.0% | Sold out |
| Yarbrough Capital, LLC | 0 | $0 | 0.00% | −4,650−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −3,564−100.0% | Sold out |
| Harbour Capital Advisors, LLC | 0 | $0 | 0.00% | −3,540−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −3,495−100.0% | Sold out |
| Versor Investments LP | 0 | $0 | 0.00% | −3,190−100.0% | Sold out |
| Mariner, LLC | 0 | $0 | 0.00% | −2,975−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −2,832−100.0% | Sold out |
| Silver Oak Securities, Inc | 0 | $0 | 0.00% | −2,509−100.0% | Sold out |
| Sumitomo Mitsui Trust Holdings, Inc. | 0 | $0 | 0.00% | −2,350−100.0% | Sold out |
| Gotham Asset Management, LLC | 0 | $0 | 0.00% | −2,017−100.0% | Sold out |
| Quent Capital, LLC | 0 | $0 | 0.00% | −2,000−100.0% | Sold out |
| Anb Bank | 0 | $0 | 0.00% | −1,744−100.0% | Sold out |
| Great Lakes Advisors, LLC | 0 | $0 | 0.00% | −1,566−100.0% | Sold out |
| Corient IA LLC | 0 | $0 | 0.00% | −1,500−100.0% | Sold out |
| Bank of Montreal | 0 | $0 | 0.00% | −1,482−100.0% | Sold out |
| Ethic Inc. | 0 | $0 | 0.00% | −1,479−100.0% | Sold out |
| RWC Asset Management LLP | 0 | $0 | 0.00% | −1,454−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −1,304−100.0% | Sold out |
| EntryPoint Capital, LLC | 0 | $0 | 0.00% | −1,299−100.0% | Sold out |
| PharVision Advisers, LLC | 0 | $0 | 0.00% | −1,292−100.0% | Sold out |
| Abacus Wealth Partners, LLC | 0 | $0 | 0.00% | −1,269−100.0% | Sold out |
| Avanza Fonder AB | 0 | $0 | 0.00% | −1,264−100.0% | Sold out |
| Valeo Financial Advisors, LLC | 0 | $0 | 0.00% | −1,180−100.0% | Sold out |
| Kovack Advisors, Inc. | 0 | $0 | 0.00% | −1,171−100.0% | Sold out |
| M&T Bank Corp | 0 | $0 | 0.00% | −1,166−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −1,002−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −662−100.0% | Sold out |
| Lazard Asset Management LLC | 0 | $0 | 0.00% | −419−100.0% | Sold out |
| Harvest Fund Management Co., Ltd | 0 | $0 | 0.00% | −402−100.0% | Sold out |
| Kestra Advisory Services, LLC | 0 | $0 | 0.00% | −400−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −104−100.0% | Sold out |
| Danske Bank A/S | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Innovative Advisory Group, LLC | 0 | $0 | 0.00% | −60−100.0% | Sold out |
| Accent Capital Management, LLC | 0 | $0 | 0.00% | −50−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −31−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −23−100.0% | Sold out |
| Elyxium Wealth, LLC | 0 | $0 | 0.00% | −22−100.0% | Sold out |
| True Wealth Design, LLC | 0 | $0 | 0.00% | −11−100.0% | Sold out |
| Security National Bank | 0 | $0 | 0.00% | −9−100.0% | Sold out |
| DV Trading LLC | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| SJS Investment Consulting Inc. | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| Cornerstone Planning Group LLC | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| Concord Wealth Partners | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Dunhill Financial, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Norges Bank | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |
| CIBC World Markets Corp | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |