iRhythm (IRTC)
Provider of Zio patch-based ECG monitoring, analytics, and physician-ready cardiac reports.
$111.75
After hours−0.25 (−0.22%)
At close$112.00(+1.33%)
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13F · 13D/G · Form 4
| Institutions | 108.99% | 35.93M shares | |
|---|---|---|---|
| 318 holders · as of Jun 30, 2026 | |||
| Insiders | 2.10% | 692.3K shares | |
| 21 holders · as of Sep 3, 2026 | |||
| Strategic holders | 11.36% | 3.75M shares | |
| 2 holders · as of Aug 13, 2026 | |||
| Adds to | 122.45% | ||
32.96M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
These groups come from separate filings that can overlap, so they add to 122.45%; nothing is left for Other.
13F, as of Jun 30, 2026
318 holders · 35.93M shares · 47 new positions · 167 increased · 91 reduced · 45 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 2.99M | 9.06% | +244.2K | Aug 7, 2026 |
| RTW Investments, LP | 2.18M | 6.62% | +514.1K | Aug 14, 2026 |
| Vanguard Portfolio Management LLC | 1.91M | 5.81% | +117.6K | Aug 13, 2026 |
| Artisan Partners Limited Partnership | 1.66M | 5.04% | +209.4K | Aug 13, 2026 |
| Vanguard Capital Management LLC | 1.46M | 4.44% | +17.5K | Aug 13, 2026 |
| Millennium Management LLC | 1.41M | 4.27% | −201.6K | Aug 14, 2026 |
| FMR LLC | 1.19M | 3.62% | −169.9K | Aug 13, 2026 |
| UBS Asset Management Americas Inc | 944.5K | 2.87% | −102.9K | Aug 13, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Vanguard Portfolio Management | 5.64% | 1.82M | 13G | Apr 28, 2026 |
| Vanguard Capital Management | 5.23% | 1.69M | 13G | Apr 27, 2026 |
| RTW Investments, LP | 5.20% | 1.67M | 13G | May 15, 2026 |
| Artisan Partners Asset Management Inc. | 5.10% | 1.66M | 13G | Aug 13, 2026 |
| Millennium Management LLC | 5.10% | 1.66M | 13G | Mar 23, 2026 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Sep 2, 2026 | Daniel G. Wilsonofficer: Chief Financial Officer | Sale | 773 | $121.83 | 34,887 |
| Aug 10, 2026 | Minang Turakhiaofficer: CHIEF MED/SCI OFCR EVP ADVTECH | Sale | 7,093 | $124.65 | 60,116 |
| Aug 10, 2026 | Sumi Shrishrimalofficer: EVP, Chief Risk Officer | Sale | 5,372 | $124.65 | 44,621 |
| Aug 10, 2026 | Chad Pattersonofficer: CHIEF COMM & PRODUCT OFFICER | Sale | 7,093 | $124.65 | 62,125 |
| Aug 10, 2026 | Patrick Michael Murphyofficer: CBO and CLO | Sale | 7,093 | $124.65 | 69,699 |
| Aug 10, 2026 | Quentin S. Blackforddirector, officer: President and CEO | Sale | 26,859 | $124.65 | 226,008 |
| Aug 3, 2026 | Chad Pattersonofficer: CHIEF COMM & PRODUCT OFFICER | Sale | 2,712 | $122.12 | 55,629 |
| Aug 3, 2026 | Julianne Roddaofficer: EVP, CHIEF PEOPLE OFFICER | Sale | 2,112 | $122.12 | 18,201 |
| Aug 3, 2026 | Mervin Smithofficer: EVP Strategic Business Ops | Sale | 617 | $122.12 | 22,410 |
| Jul 2, 2026 | Sean Clinton Freemanofficer: EVP, Strategy & Corp Devt | Sale | 918 | $124.71 | 13,641 |
House and Senate disclosures
Not reported.