iRhythm Holdings
IRTC · NASDAQ
$113.85+$4.25 (+3.88%)TodayMarket closed ·
Prev close $109.60
Who owns IRTC
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 45.0% of IRTC’s shares.
- BlackRock Institutional Trust Company, N.A.7.6%
- RTW Investments L.P.6.6%
- Vanguard Portfolio Management, LLC5.8%
- Artisan Partners Limited Partnership5.1%
- Next 6 largest institutions19.8%
- All other shareholders55.0%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 2.51M | 7.63% |
| RTW Investments L.P. | 2.18M | 6.64% |
| Vanguard Portfolio Management, LLC | 1.91M | 5.82% |
| Artisan Partners Limited Partnership | 1.66M | 5.05% |
| Vanguard Capital Management, LLC | 1.46M | 4.45% |
| Millennium Management LLC | 1.41M | 4.28% |
| Fidelity Management & Research Company LLC | 1.02M | 3.12% |
| Geode Capital Management, L.L.C. | 881.90K | 2.68% |
| Eventide Asset Management, LLC | 880.34K | 2.68% |
| BNP Paribas Asset Management USA, Inc. | 866.04K | 2.64% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 1.03M | 3.14% |
| iShares Russell 2000 ETF | 856.49K | 2.61% |
| Vanguard Small-Cap Index Fund | 743.36K | 2.26% |
| Eventide Gilead Fund | 582.47K | 1.77% |
| Vanguard Explorer Fund | 521.70K | 1.59% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $56.89K (1 trade) and sold $8.73M (19 trades) of IRTC on the open market.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Wilson Daniel G. | Sale | 773 | $94.17K |
| Turakhia Minang | Sale | 7.09K | $884.15K |
| Shrishrimal Sumi | Sale | 5.37K | $669.64K |
| Patterson Chad | Sale | 7.09K | $884.17K |
| Murphy Patrick Michael | Sale | 7.09K | $884.16K |
| Blackford Quentin S. | Sale | 26.86K | $3.35M |
| Turakhia Minang | Award | 13.59K | — |
| Shrishrimal Sumi | Award | 9.71K | — |
| Patterson Chad | Award | 13.59K | — |
| Murphy Patrick Michael | Award | 13.59K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 3.03M
- Days to cover
- 5.85
- % of shares outstanding
- 9.23%
- Average daily volume
- 518.84K
- Change since last report
- −0.7%
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