Supply breakdown
Shares as of Jul 30, 2026| Category | Shares | % | Value | Status |
|---|---|---|---|---|
| Circulating | 32.96M | 100.0% | $3.92B | Estimated |
| Free float | - | - | - | Unavailable |
| Insider-held, unrestricted | - | - | - | Unavailable |
| Locked team funds | - | - | - | Unavailable |
| Other restricted (unlisted classes only) | - | - | - | Unavailable |
| Total outstanding | 32.96M | 100.0% | $3.92B | Verified |
| Ownership views (overlap the categories above, never added) | ||||
| Institutional holdings (13F; over 100%, double counted) | 35.63M | 108.1% | $4.24B | Estimated |
| Insider-held, all (Forms 3, 4, 5) | - | - | - | Unavailable |
Institutional and insider holdings can include both tradable and locked shares, so they are shown for reference and never added to the total. Check: no class has more shares deducted than it has outstanding, and the review found no shares that may be counted twice: reconciles.
Valuation
- Traditional$3.92B
- Fully diluted-
- Circulating$3.92B
- Free float-
- Locked team value$0
- Other restricted value$0
Locked and restricted shares
Not reviewed yet.
Institutional holders
13F, quarter ended Jun 30, 2026| Holder | Shares | % of total |
|---|---|---|
| BlackRock, Inc. | 2.99M | 9.06% |
| RTW INVESTMENTS, LP | 2.18M | 6.62% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.91M | 5.81% |
| Artisan Partners Limited Partnership | 1.66M | 5.04% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.46M | 4.44% |
| MILLENNIUM MANAGEMENT LLC | 1.41M | 4.27% |
| FMR LLC | 1.19M | 3.62% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 944.5K | 2.87% |
| GEODE CAPITAL MANAGEMENT, LLC | 881.9K | 2.68% |
| EVENTIDE ASSET MANAGEMENT, LLC | 880.3K | 2.67% |
Sum of long share positions in Form 13F reports for the quarter. 13F covers managers with over $100M in US equities; some positions are reported by more than one filer. The total is 108% of shares outstanding, so it counts some shares twice: positions reported by more than one manager, and lent shares that appear at both the lender and the buyer. Read it as an upper bound.
Insiders
Forms 3, 4 and 5Form 4 aggregation pending
Share classes
| Class | Listing | Shares outstanding | As of |
|---|---|---|---|
| Common stock | IRTC on Nasdaq | 32,963,003 | Jul 30, 2026 |
Notes and sources
- iRhythm Holdings, Inc. 10-Q for period ended 2026-06-30, Cover page (0001388658-26-000072)
- SEC public float (non-affiliates): $4.90B as of Jun 30, 2025, from the 10-K cover. It is a dollar value at a past date, not circulating supply.