iRhythm Holdings, Inc. (IRTC)

As of 31 August 2026, short interest in IRTC is 2,788,408 shares, down 424,186 shares over the last month. Over the last 48 readings it ranged from 2,122,928 shares (29 November 2024) to 3,430,153 shares (15 July 2026). At the reported average volume of 496K shares a day that is 5.6 days to cover, elevated.

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As of 17 September 2026, the short share of IRTC volume is 53.2%, up 2.0 points over the last five sessions. Over the last 52 readings it ranged from 32.5% (10 July 2026) to 83.5% (4 September 2026). The latest reading is 9.5 points below the 30-session average of 62.8%, on 155K shares reported.

As of 21 August 2026, the fails-to-deliver balance in IRTC is 1,114 shares, up 57 shares over the last settlement date. Over the last 52 readings it ranged from 1 share (31 July 2025) to 41,911 shares (2 March 2026). The latest reading sits at the bottom of that range.

Insiders at IRTC reported 9 open-market sells worth $7.4M in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Wilson Daniel G. (Chief Financial Officer) on 2026-09-02.

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are the rarer, stronger signal.

8 Form 144 notices on file for IRTC worth $4.5M at the prices reported; 0 in the last 90 days worth $0. Latest: ABHIJIT Y TALWALKAR filed on 2026-05-11 to sell 5,312 shares ($626K) from 2026-05-11.

14 holders above 5% have filed on IRTC, all on Schedule 13G (passive). The largest reported stake is RTW Investments, LP at 6.6% of the class (2,182,631 shares), filed 2026-08-14 for an event on 2026-06-30.

7 of the 30 tracked managers held IRTC at their latest 13F, $333.8M in total at quarter-end prices. Millennium Management is the largest at $167.3M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 4 cut.

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

In Q2 2026 (quarter ended 2026-06-30) iRhythm Holdings, Inc. reported revenue of $224.2M, up 20.1% from the same quarter a year earlier, and net loss of $381K (-0.01 diluted EPS). In FY 2025 it generated $80.9M of operating cash flow.

Quarterly, last 8 quarters

Fiscal years, with buybacks and dividends

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-30 from the cover page.