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HowShorted

How shorted is RHYTHM PHARMACEUTICALS, INC.? RYTM

#292most shorted US stockof 3,805 ranked stocks, more shorted than 92%

14.94%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.02
5 reports (~10 weeks)
+0.84
days to cover
20.06
Aggregate net short position time series for RHYTHM PHARMACEUTICALS, 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 RHYTHM PHARMACEUTICALS, 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
4 Aug 202613.78% 31 Jul 202614.75% 14 Aug 2026+0.97
5 May 202612.07% 30 Apr 202612.09% 15 May 2026+0.02
26 Feb 20269.02% 13 Feb 20269.47% 27 Feb 2026+0.45
9 Jan 20269.29% 31 Dec 20259.42% 15 Jan 2026+0.13
4 Nov 20257.84% 31 Oct 20258.24% 14 Nov 2025+0.40
5 Aug 20257.10% 31 Jul 20257.04% 15 Aug 2025−0.06
7 May 20257.63% 30 Apr 20257.97% 15 May 2025+0.34
26 Feb 20258.80% 14 Feb 20258.37% 28 Feb 2025−0.43

Fails to deliver

The SEC's fails-to-deliver figure for RYTM: 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
3,997
26 Aug 2026
Highest in window
107,783
17 Mar 2026
Days with a balance
56
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for RHYTHM PHARMACEUTICALS, 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 108K 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 202614.94%−0.02
31 Aug 202614.96%+0.21
14 Aug 202614.75%+0.97
31 Jul 202613.78%−0.19
15 Jul 202613.97%−0.13
30 Jun 202614.10%+2.42
15 Jun 202611.68%+0.14
29 May 202611.54%−0.55
15 May 202612.09%+0.02
30 Apr 202612.07%+0.34
15 Apr 202611.73%+0.30
31 Mar 202611.43%+1.64
13 Mar 20269.79%+0.32
27 Feb 20269.47%+0.45
13 Feb 20269.02%−0.33
30 Jan 20269.35%−0.07
15 Jan 20269.42%+0.13
31 Dec 20259.29%+0.93
15 Dec 20258.36%+0.09
28 Nov 20258.27%+0.03
14 Nov 20258.24%+0.40
31 Oct 20257.84%−0.55
15 Oct 20258.39%−0.01
30 Sep 20258.40%+0.54
15 Sep 20257.86%+0.38
29 Aug 20257.48%+0.44
15 Aug 20257.04%−0.06
31 Jul 20257.10%−0.43
15 Jul 20257.53%−0.10
30 Jun 20257.63%+0.15
13 Jun 20257.48%−0.03
30 May 20257.51%−0.46
15 May 20257.97%+0.34
30 Apr 20257.63%−0.68
15 Apr 20258.31%+0.73
31 Mar 20257.58%−0.08
14 Mar 20257.66%−0.71
28 Feb 20258.37%−0.43
14 Feb 20258.80%+0.46
31 Jan 20258.34%−0.53
15 Jan 20258.87%+0.30
31 Dec 20248.57%−0.88
13 Dec 20249.45%−0.91
29 Nov 202410.36%−0.56
15 Nov 202410.92%−2.76
31 Oct 202413.68%−0.16
15 Oct 202413.84%+0.37
30 Sep 202413.47%−1.81
13 Sep 202415.28%−0.49
30 Aug 202415.77%−0.38
15 Aug 202416.15%−0.55
31 Jul 202416.70%+0.19
15 Jul 202416.51%+1.36
28 Jun 202415.15%−2.96
14 Jun 202418.11%+0.19
31 May 202417.92%+0.99
15 May 202416.93%−0.99
30 Apr 202417.92%+0.66
15 Apr 202417.26%+0.79
28 Mar 202416.47%+0.91
15 Mar 202415.56%+0.32
29 Feb 202415.24%+0.41
15 Feb 202414.83%−0.17
31 Jan 202415.00%+0.71
12 Jan 202414.29%+0.52
29 Dec 202313.77%−0.85
15 Dec 202314.62%−1.04
30 Nov 202315.66%−0.27
15 Nov 202315.93%−4.55
31 Oct 202320.48%−0.24
13 Oct 202320.72%+2.99
29 Sep 202317.73%−3.32
15 Sep 202321.05%+2.33
31 Aug 202318.72%−0.54
15 Aug 202319.26%−2.55
31 Jul 202321.81%+1.61
14 Jul 202320.20%+0.86
30 Jun 202319.34%+1.87
15 Jun 202317.47%+0.42
31 May 202317.05%+1.27
15 May 202315.78%+0.91
28 Apr 202314.87%+0.38
14 Apr 202314.49%+0.23
31 Mar 202314.26%+1.16
15 Mar 202313.10%−1.30
28 Feb 202314.40%−0.05
15 Feb 202314.45%+0.72
31 Jan 202313.73%−0.34
13 Jan 202314.07%+0.16
30 Dec 202213.91%−0.44
15 Dec 202214.35%+0.39
30 Nov 202213.96%−1.02
15 Nov 202214.98%−1.57
31 Oct 202216.55%+1.53
14 Oct 202215.02%−0.03
30 Sep 202215.05%+3.16
15 Sep 202211.89%+0.44
31 Aug 202211.45%+0.41
15 Aug 202211.04%−3.23
29 Jul 202214.27%+2.47
15 Jul 202211.80%+5.51
30 Jun 20226.29%−0.99
15 Jun 20227.28%+0.15
31 May 20227.13%+0.98
13 May 20226.15%−0.64
29 Apr 20226.79%−0.55
14 Apr 20227.34%−0.12
31 Mar 20227.46%−2.14
15 Mar 20229.60%+0.54
28 Feb 20229.06%+0.36
15 Feb 20228.70%+0.46
31 Jan 20228.24%+0.41
14 Jan 20227.83%+0.08
31 Dec 20217.75%+0.15
15 Dec 20217.60%+0.22
30 Nov 20217.38%−0.09
15 Nov 20217.47%−0.31
29 Oct 20217.78%+0.01
15 Oct 20217.77%+0.36
30 Sep 20217.41%−0.01
15 Sep 20217.42%−0.80
31 Aug 20218.22%−0.54
13 Aug 20218.76%−0.73
30 Jul 20219.49%+0.81
15 Jul 20218.68%+1.15
30 Jun 20217.53%−0.12
15 Jun 20217.65%+0.80
28 May 20216.85%−0.20
14 May 20217.05%−0.22
30 Apr 20217.27%−1.03
15 Apr 20218.30%−1.12
31 Mar 20219.42%+3.32
15 Mar 20216.10%−0.09
26 Feb 20216.19%−0.46
12 Feb 20216.65%−0.07
29 Jan 20216.72%−1.23
15 Jan 20217.95%+1.71
31 Dec 20206.24%+2.24
15 Dec 20204.00%−0.68
30 Nov 20204.68%+0.37
13 Nov 20204.31%+0.27
30 Oct 20204.04%−0.57
15 Oct 20204.61%+0.05
30 Sep 20204.56%−0.12
15 Sep 20204.68%+0.37
31 Aug 20204.31%−0.04
14 Aug 20204.35%−0.09
31 Jul 20204.44%+0.09
15 Jul 20204.35%+0.37
30 Jun 20203.98%+0.16
15 Jun 20203.82%+0.27
29 May 20203.55%−0.55
15 May 20204.10%+0.84
30 Apr 20203.26%−0.65
15 Apr 20203.91%−0.56
31 Mar 20204.47%+0.84
13 Mar 20203.63%−1.63
28 Feb 20205.26%+1.33
14 Feb 20203.93%−0.57
31 Jan 20204.50%−0.35
15 Jan 20204.85%−1.88
31 Dec 20196.73%+0.90
13 Dec 20195.83%−0.14
29 Nov 20195.97%+0.20
15 Nov 20195.77%−0.79
31 Oct 20196.56%−3.15
15 Oct 20199.71%–

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

Frequently asked questions

How shorted is RHYTHM PHARMACEUTICALS, INC. right now?
14.94% of RHYTHM PHARMACEUTICALS, INC.'s (RYTM) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 292nd 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 RYTM'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 RYTM's days to cover?
20.06 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.