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HowShorted

How shorted is Perspective Therapeutics, Inc.? CATX

#120most shorted US stockof 3,805 ranked stocks, more shorted than 96%

19.98%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.48
5 reports (~10 weeks)
+0.03
days to cover
16.85
Aggregate net short position time series for Perspective Therapeutics, 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 Perspective Therapeutics, 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
10 Aug 202620.60% 31 Jul 202620.18% 14 Aug 2026−0.42
11 May 202611.41% 30 Apr 202611.07% 15 May 2026−0.34
4 May 202611.41% 30 Apr 202611.07% 15 May 2026−0.34
16 Mar 20268.86% 13 Mar 202612.40% 31 Mar 2026+3.54
2 Feb 202612.83% 30 Jan 202612.93% 13 Feb 2026+0.10
9 Jan 202611.49% 31 Dec 202511.05% 15 Jan 2026−0.44
10 Nov 20258.86% 31 Oct 20259.04% 14 Nov 2025+0.18
20 Oct 20258.74% 15 Oct 20258.86% 31 Oct 2025+0.12

Fails to deliver

The SEC's fails-to-deliver figure for CATX: 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
196
9 Sep 2026
Highest in window
152,565
1 Jul 2026
Days with a balance
64
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Perspective Therapeutics, 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 153K shares.

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Sector: Healthcare · By year: 2018 · 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202619.98%−0.48
31 Aug 202620.46%+0.28
14 Aug 202620.18%−0.42
31 Jul 202620.60%+0.60
15 Jul 202620.00%+0.05
30 Jun 202619.95%+7.98
15 Jun 202611.97%+0.77
29 May 202611.20%+0.13
15 May 202611.07%−0.34
30 Apr 202611.41%−0.59
15 Apr 202612.00%−0.40
31 Mar 202612.40%+3.54
13 Mar 20268.86%−4.11
27 Feb 202612.97%+0.04
13 Feb 202612.93%+0.10
30 Jan 202612.83%+1.78
15 Jan 202611.05%−0.44
31 Dec 202511.49%0.00
15 Dec 202511.49%+1.87
28 Nov 20259.62%+0.58
14 Nov 20259.04%+0.18
31 Oct 20258.86%+0.12
15 Oct 20258.74%−0.38
30 Sep 20259.12%+0.14
15 Sep 20258.98%+0.40
29 Aug 20258.58%+0.12
15 Aug 20258.46%−0.31
31 Jul 20258.77%+0.20
15 Jul 20258.57%+0.14
30 Jun 20258.43%+0.85
13 Jun 20257.58%+0.45
30 May 20257.13%−0.51
15 May 20257.64%+0.53
30 Apr 20257.11%+0.33
15 Apr 20256.78%−0.93
31 Mar 20257.71%−1.08
14 Mar 20258.79%+0.05
28 Feb 20258.74%+0.63
14 Feb 20258.11%+0.09
31 Jan 20258.02%−3.27
15 Jan 202511.29%−1.93
31 Dec 202413.22%−1.45
13 Dec 202414.67%−0.79
29 Nov 202415.46%+3.21
15 Nov 202412.25%+0.35
31 Oct 202411.90%+0.21
15 Oct 202411.69%−2.53
30 Sep 202414.22%+3.63
13 Sep 202410.59%+1.06
30 Aug 20249.53%−0.78
15 Aug 202410.31%+5.23
14 Jun 20245.08%+1.09
31 May 20243.99%+1.39
15 May 20242.60%+0.28
30 Apr 20242.32%+0.54
15 Apr 20241.78%+0.40
28 Mar 20241.38%+0.71
15 Mar 20240.67%0.00
29 Feb 20240.67%−0.40
15 Feb 20241.07%+0.34
31 Jan 20240.73%+0.04
12 Jan 20240.69%0.00
29 Dec 20230.69%+0.05
15 Dec 20230.64%−0.02
30 Nov 20230.66%−0.03
15 Nov 20230.69%−0.04
31 Oct 20230.73%+0.04
13 Oct 20230.69%−0.03
29 Sep 20230.72%+0.16
15 Sep 20230.56%0.00
31 Aug 20230.56%−0.07
15 Aug 20230.63%+0.02
31 Jul 20230.61%+0.02
14 Jul 20230.59%−0.02
30 Jun 20230.61%+0.05
15 Jun 20230.56%−0.08
31 May 20230.64%−0.05
15 May 20230.69%−0.22
28 Apr 20230.91%+0.72
15 Feb 20230.19%−0.10
31 Jan 20230.29%0.00
13 Jan 20230.29%−0.03
30 Dec 20220.32%−0.03
15 Dec 20220.35%−0.02
30 Nov 20220.37%+0.02
15 Nov 20220.35%−0.14
31 Oct 20220.49%−0.24
14 Oct 20220.73%+0.34
30 Sep 20220.39%+0.02
15 Sep 20220.37%+0.02
31 Aug 20220.35%−0.11
15 Aug 20220.46%+0.02
29 Jul 20220.44%−0.03
15 Jul 20220.47%0.00
30 Jun 20220.47%−0.04
15 Jun 20220.51%0.00
31 May 20220.51%−0.03
13 May 20220.54%−0.01
29 Apr 20220.55%+0.02
14 Apr 20220.53%−0.08
31 Mar 20220.61%+0.05
15 Mar 20220.56%+0.06
28 Feb 20220.50%−0.10
15 Feb 20220.60%−0.05
31 Jan 20220.65%+0.04
14 Jan 20220.61%−0.02
31 Dec 20210.63%−0.18
15 Dec 20210.81%−0.07
30 Nov 20210.88%−0.23
15 Nov 20211.11%+0.11
29 Oct 20211.00%+0.08
15 Oct 20210.92%−0.26
30 Sep 20211.18%+0.35
15 Sep 20210.83%+0.11
31 Aug 20210.72%−0.22
13 Aug 20210.94%+0.02
30 Jul 20210.92%+0.02
15 Jul 20210.90%+0.01
30 Jun 20210.89%−0.11
15 Jun 20211.00%+0.13
28 May 20210.87%−0.41
14 May 20211.28%−0.09
30 Apr 20211.37%−0.51
15 Apr 20211.88%+0.39
31 Mar 20211.49%−0.53
15 Mar 20212.02%+0.32
26 Feb 20211.70%−0.05
12 Feb 20211.75%+0.56
31 Dec 20201.19%+0.27
15 Dec 20200.92%−0.12
30 Nov 20201.04%−0.17
13 Nov 20201.21%−0.19
30 Oct 20201.40%−0.47
15 Oct 20201.87%−0.04
30 Sep 20201.91%−0.30
15 Sep 20202.21%+0.07
31 Aug 20202.14%−0.14
14 Aug 20202.28%+0.03
31 Jul 20202.25%−0.01
15 Jul 20202.26%−0.06
30 Jun 20202.32%−0.24
15 Jun 20202.56%−0.65
29 May 20203.21%−0.47
15 May 20203.68%+0.75
30 Apr 20202.93%0.00
15 Apr 20202.93%−0.22
31 Mar 20203.15%−0.50
13 Mar 20203.65%−0.33
28 Feb 20203.98%−0.39
14 Feb 20204.37%+0.45
31 Jan 20203.92%+1.42
15 Jan 20202.50%+0.05
31 Dec 20192.45%−0.16
13 Dec 20192.61%+0.34
29 Nov 20192.27%+0.23
15 Nov 20192.04%+0.10
31 Oct 20191.94%−0.04
15 Oct 20191.98%−0.06
30 Sep 20192.04%+1.30
31 Jul 20190.74%−0.20
15 Jul 20190.94%+0.07
28 Jun 20190.87%−0.16
14 Jun 20191.03%+0.06
31 May 20190.97%−0.31
15 May 20191.28%+0.13
30 Apr 20191.15%−0.08
15 Apr 20191.23%−0.03
29 Mar 20191.26%−0.05
15 Mar 20191.31%−0.07
28 Feb 20191.38%−0.14
15 Feb 20191.52%−0.06
31 Jan 20191.58%−0.05
15 Jan 20191.63%−0.02
31 Dec 20181.65%+0.13
14 Dec 20181.52%−0.06
30 Nov 20181.58%+0.07
15 Nov 20181.51%−0.09
31 Oct 20181.60%+0.04
15 Oct 20181.56%+0.13
28 Sep 20181.43%+1.26
29 Jun 20180.17%−0.01
31 May 20180.18%−0.10
15 May 20180.28%+0.19
30 Apr 20180.09%−0.02
13 Apr 20180.11%+0.01
29 Mar 20180.10%+0.03
15 Mar 20180.07%−0.03
28 Feb 20180.10%−0.02
15 Feb 20180.12%+0.01
31 Jan 20180.11%−0.10
12 Jan 20180.21%−0.04
29 Dec 20170.25%–

Newest first. Scroll inside the table for earlier dates, back to 29 Dec 2017.

Frequently asked questions

How shorted is Perspective Therapeutics, Inc. right now?
19.98% of Perspective Therapeutics, Inc.'s (CATX) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 120th 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 CATX'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 CATX's days to cover?
16.85 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.