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HowShorted

How shorted is iRhythm Holdings, Inc.? IRTC

#773most shorted US stockof 3,805 ranked stocks, more shorted than 79%

9.27%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.81
5 reports (~10 weeks)
−0.58
days to cover
5.56
Aggregate net short position time series for iRhythm Holdings, Inc.

Markers along the chart's base: ▲ results announced (an 8-K reporting results was filed) ▲ quarterly or annual report filed. Dates are SEC filing dates; hover a point to see events since the previous settlement.

Days to cover

FINRA's own figure: reported shares short divided by the stock's average daily trading volume, published alongside each settlement. It expresses the short position in days of typical trading rather than as a percentage of the company; the two can move differently.

Aggregate net short position time series for iRhythm Holdings, Inc. days to cover

Short interest around results

For each results announcement (an 8-K reporting results, by its SEC filing date), the FINRA settlement before it and the first one after. Settlements fall twice a month, so the two figures can sit up to a month apart and much else changes in between: this shows what was reported, not why.

Reported short interest before and after each results announcement
Results filedSettlement beforeSettlement afterChange
6 Aug 20269.75% 31 Jul 20268.50% 14 Aug 2026−1.25
30 Apr 20269.34% 15 Apr 20269.44% 15 May 2026+0.10
19 Feb 202610.52% 13 Feb 202610.50% 27 Feb 2026−0.02
30 Oct 20258.06% 15 Oct 20257.24% 31 Oct 2025−0.82
31 Jul 20257.81% 15 Jul 20258.26% 15 Aug 2025+0.45
20 Feb 20258.36% 14 Feb 20259.38% 28 Feb 2025+1.02
30 Oct 20248.08% 15 Oct 20248.76% 31 Oct 2024+0.68
1 Aug 20249.56% 31 Jul 20248.23% 15 Aug 2024−1.33

Fails to deliver

The SEC's fails-to-deliver figure for IRTC: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Last balance on file
186
10 Sep 2026
Highest in window
41,911
2 Mar 2026
Days with a balance
39
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for iRhythm Holdings, Inc. fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 42K shares.

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Sector: Healthcare · By year: 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20269.27%+0.81
31 Aug 20268.46%−0.04
14 Aug 20268.50%−1.25
31 Jul 20269.75%−0.69
15 Jul 202610.44%+0.59
30 Jun 20269.85%+0.93
15 Jun 20268.92%−0.68
29 May 20269.60%+0.16
15 May 20269.44%+0.75
30 Apr 20268.69%−0.65
15 Apr 20269.34%+0.23
31 Mar 20269.11%+0.17
13 Mar 20268.94%−1.56
27 Feb 202610.50%−0.02
13 Feb 202610.52%+1.73
30 Jan 20268.79%+0.25
15 Jan 20268.54%+1.40
31 Dec 20257.14%−0.43
15 Dec 20257.57%−0.41
28 Nov 20257.98%+0.09
14 Nov 20257.89%+0.65
31 Oct 20257.24%−0.82
15 Oct 20258.06%+0.14
30 Sep 20257.92%−0.36
15 Sep 20258.28%−0.36
29 Aug 20258.64%+0.38
15 Aug 20258.26%+0.43
31 Jul 20257.83%+0.02
15 Jul 20257.81%−0.46
30 Jun 20258.27%+0.19
13 Jun 20258.08%+0.41
30 May 20257.67%−0.75
15 May 20258.42%−0.94
30 Apr 20259.36%−0.57
15 Apr 20259.93%+0.59
31 Mar 20259.34%+0.03
14 Mar 20259.31%−0.07
28 Feb 20259.38%+1.02
14 Feb 20258.36%+0.61
31 Jan 20257.75%+0.31
15 Jan 20257.44%+0.29
31 Dec 20247.15%+0.08
13 Dec 20247.07%+0.29
29 Nov 20246.78%−0.93
15 Nov 20247.71%−1.05
31 Oct 20248.76%+0.68
15 Oct 20248.08%−0.11
30 Sep 20248.19%−0.42
13 Sep 20248.61%+0.68
30 Aug 20247.93%−0.30
15 Aug 20248.23%−1.33
31 Jul 20249.56%+0.23
15 Jul 20249.33%+0.08
28 Jun 20249.25%−0.18
14 Jun 20249.43%+0.21
31 May 20249.22%−0.61
15 May 20249.83%+0.25
30 Apr 20249.58%+0.40
15 Apr 20249.18%+0.85
28 Mar 20248.33%+0.28
15 Mar 20248.05%+2.18
29 Feb 20245.87%+1.80
15 Feb 20244.07%−0.11
31 Jan 20244.18%+0.43
12 Jan 20243.75%−0.89
29 Dec 20234.64%−1.45
15 Dec 20236.09%−0.04
30 Nov 20236.13%+0.08
15 Nov 20236.05%−1.36
31 Oct 20237.41%−0.85
13 Oct 20238.26%−0.17
29 Sep 20238.43%+0.78
15 Sep 20237.65%+0.04
31 Aug 20237.61%−0.05
15 Aug 20237.66%+0.45
31 Jul 20237.21%−1.13
14 Jul 20238.34%0.00
30 Jun 20238.34%+0.55
15 Jun 20237.79%+0.38
31 May 20237.41%+0.03
15 May 20237.38%+0.10
28 Apr 20237.28%−0.28
14 Apr 20237.56%+0.43
31 Mar 20237.13%−0.45
15 Mar 20237.58%+0.50
28 Feb 20237.08%+0.41
15 Feb 20236.67%+1.38
31 Jan 20235.29%−0.24
13 Jan 20235.53%+0.34
30 Dec 20225.19%+0.53
15 Dec 20224.66%+0.37
30 Nov 20224.29%−0.15
15 Nov 20224.44%−0.05
31 Oct 20224.49%−0.02
14 Oct 20224.51%−0.14
30 Sep 20224.65%−0.53
15 Sep 20225.18%−0.40
31 Aug 20225.58%−0.82
15 Aug 20226.40%−0.10
29 Jul 20226.50%+0.30
15 Jul 20226.20%+0.73
30 Jun 20225.47%0.00
15 Jun 20225.47%+0.53
31 May 20224.94%−0.75
13 May 20225.69%+0.41
29 Apr 20225.28%+0.12
14 Apr 20225.16%+0.36
31 Mar 20224.80%+0.64
15 Mar 20224.16%+0.34
28 Feb 20223.82%−0.36
15 Feb 20224.18%+0.32
31 Jan 20223.86%−0.33
14 Jan 20224.19%+1.10
31 Dec 20213.09%−0.24
15 Dec 20213.33%+0.58
30 Nov 20212.75%−1.74
15 Nov 20214.49%+0.45
29 Oct 20214.04%−0.07
15 Oct 20214.11%+0.60
30 Sep 20213.51%−2.11
15 Sep 20215.62%−0.18
31 Aug 20215.80%+0.28
13 Aug 20215.52%−1.05
30 Jul 20216.57%−0.77
15 Jul 20217.34%−0.22
30 Jun 20217.56%+1.38
15 Jun 20216.18%−1.55
28 May 20217.73%+0.05
14 May 20217.68%−0.48
30 Apr 20218.16%+0.12
15 Apr 20218.04%−1.69
31 Mar 20219.73%+0.01
15 Mar 20219.72%−1.68
26 Feb 202111.40%−0.58
12 Feb 202111.98%−0.10
29 Jan 202112.08%−2.00
15 Jan 202114.08%−0.18
31 Dec 202014.26%+0.66
15 Dec 202013.60%+1.61
30 Nov 202011.99%+0.33
13 Nov 202011.66%−0.07
30 Oct 202011.73%+1.28
15 Oct 202010.45%+0.40
30 Sep 202010.05%−0.28
15 Sep 202010.33%−0.19
31 Aug 202010.52%−0.57
14 Aug 202011.09%−2.79
31 Jul 202013.88%−1.13
15 Jul 202015.01%+0.54
30 Jun 202014.47%+0.50
15 Jun 202013.97%+0.59
29 May 202013.38%−0.39
15 May 202013.77%−2.25
30 Apr 202016.02%−1.03
15 Apr 202017.05%−0.91
31 Mar 202017.96%−0.71
13 Mar 202018.67%−3.23
28 Feb 202021.90%−1.97
14 Feb 202023.87%−0.98
31 Jan 202024.85%−0.89
15 Jan 202025.74%+0.78
31 Dec 201924.96%+0.28
13 Dec 201924.68%−0.06
29 Nov 201924.74%+2.96
15 Nov 201921.78%+0.41
31 Oct 201921.37%−0.03
15 Oct 201921.40%–

Newest first. Scroll inside the table for earlier dates, back to 15 Oct 2019.

Frequently asked questions

How shorted is iRhythm Holdings, Inc. right now?
9.27% of iRhythm Holdings, Inc.'s (IRTC) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 773rd most shorted US stock, out of 3,805 we rank.
What does this number include?
FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.
Why does it only update twice a month?
US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.
Is this IRTC's short float?
No. This is short interest as a percentage of shares outstanding, the count in the company's SEC filings. "Short float" divides the same FINRA short count by the public float, which excludes closely held shares, so it comes out higher for the same company. We publish no float estimates: the float is not a regulatory figure.
What is IRTC's days to cover?
5.56 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume. It is published in the same FINRA file and shown verbatim; we hold no volume data ourselves.
Which funds are short?
US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.