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HowShorted

How shorted is Passage Bio, Inc.? PASG

#2,470most shorted US stockof 3,805 ranked stocks, more shorted than 35%

3.01%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.15
5 reports (~10 weeks)
−0.55
days to cover
3.20
Aggregate net short position time series for Passage Bio, 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 Passage Bio, 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
3 Mar 20262.85% 27 Feb 20263.07% 13 Mar 2026+0.22
10 Nov 20252.60% 31 Oct 20252.84% 14 Nov 2025+0.24
13 May 20252.90% 30 Apr 20252.79% 15 May 2025−0.11
4 Mar 20252.93% 28 Feb 20252.72% 14 Mar 2025−0.21
10 Jan 20256.24% 31 Dec 20242.92% 15 Jan 2025−3.32
13 Nov 20242.66% 31 Oct 20242.63% 15 Nov 2024−0.03
8 Aug 20243.36% 31 Jul 20242.90% 15 Aug 2024−0.46
1 Aug 20243.36% 31 Jul 20242.90% 15 Aug 2024−0.46

Fails to deliver

The SEC's fails-to-deliver figure for PASG: 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
258
27 Jul 2026
Highest in window
2,452
22 Sep 2025
Days with a balance
17
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Passage Bio, 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 2.5K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20263.01%−0.15
31 Aug 20263.16%−1.10
14 Aug 20264.26%−0.60
31 Jul 20264.86%+0.97
15 Jul 20263.89%+0.33
30 Jun 20263.56%+0.67
15 Jun 20262.89%−0.91
29 May 20263.80%−1.27
15 May 20265.07%+0.55
30 Apr 20264.52%+2.40
15 Apr 20262.12%−1.45
31 Mar 20263.57%+0.50
13 Mar 20263.07%+0.22
27 Feb 20262.85%−0.04
13 Feb 20262.89%+0.05
14 Nov 20252.84%+0.24
31 Oct 20252.60%+0.01
15 Oct 20252.59%+0.03
30 Sep 20252.56%−0.01
15 Sep 20252.57%−0.06
29 Aug 20252.63%−0.43
15 Aug 20253.06%+0.20
30 Jun 20252.86%−0.01
13 Jun 20252.87%−0.03
30 May 20252.90%+0.11
15 May 20252.79%−0.11
30 Apr 20252.90%−0.04
15 Apr 20252.94%+0.13
31 Mar 20252.81%+0.09
14 Mar 20252.72%−0.21
28 Feb 20252.93%+0.03
14 Feb 20252.90%−0.02
31 Jan 20252.92%0.00
15 Jan 20252.92%−3.32
31 Dec 20246.24%+3.49
13 Dec 20242.75%+0.07
29 Nov 20242.68%+0.05
15 Nov 20242.63%−0.03
31 Oct 20242.66%−0.06
15 Oct 20242.72%−0.03
30 Sep 20242.75%−0.14
13 Sep 20242.89%+0.07
30 Aug 20242.82%−0.08
15 Aug 20242.90%−0.46
31 Jul 20243.36%+0.33
15 Jul 20243.03%0.00
28 Jun 20243.03%+0.05
14 Jun 20242.98%−0.01
31 May 20242.99%−0.08
15 May 20243.07%−0.09
30 Apr 20243.16%+0.01
15 Apr 20243.15%+0.77
28 Mar 20242.38%+0.20
15 Mar 20242.18%+1.18
29 Feb 20241.00%+0.54
15 Feb 20240.46%−0.05
31 Jan 20240.51%−0.07
12 Jan 20240.58%−0.12
29 Dec 20230.70%+0.25
15 Dec 20230.45%+0.01
30 Nov 20230.44%−0.04
15 Nov 20230.48%+0.06
31 Oct 20230.42%−0.01
13 Oct 20230.43%−0.02
29 Sep 20230.45%+0.07
15 Sep 20230.38%+0.02
31 Aug 20230.36%−0.01
15 Aug 20230.37%+0.04
31 Jul 20230.33%−0.11
14 Jul 20230.44%+0.04
30 Jun 20230.40%−0.15
15 Jun 20230.55%+0.06
31 May 20230.49%+0.01
15 May 20230.48%−0.05
28 Apr 20230.53%−0.06
14 Apr 20230.59%−0.08
31 Mar 20230.67%+0.07
15 Mar 20230.60%−0.01
28 Feb 20230.61%+0.06
15 Feb 20230.55%+0.02
31 Jan 20230.53%−0.09
13 Jan 20230.62%−0.06
30 Dec 20220.68%−0.04
15 Dec 20220.72%+0.11
30 Nov 20220.61%−0.04
15 Nov 20220.65%−0.11
31 Oct 20220.76%−0.29
14 Oct 20221.05%−0.28
30 Sep 20221.33%−0.04
15 Sep 20221.37%−0.34
31 Aug 20221.71%−0.10
15 Aug 20221.81%−0.31
29 Jul 20222.12%−0.32
15 Jul 20222.44%−0.49
30 Jun 20222.93%−2.03
15 Jun 20224.96%−0.44
31 May 20225.40%−0.23
13 May 20225.63%+1.10
29 Apr 20224.53%+0.66
14 Apr 20223.87%0.00
31 Mar 20223.87%+0.43
15 Mar 20223.44%+0.09
28 Feb 20223.35%+0.73
15 Feb 20222.62%−0.42
31 Jan 20223.04%+0.07
14 Jan 20222.97%−0.14
31 Dec 20213.11%+0.06
15 Dec 20213.05%−0.38
30 Nov 20213.43%−1.86
15 Nov 20215.29%−0.11
29 Oct 20215.40%+0.31
15 Oct 20215.09%−0.28
30 Sep 20215.37%−1.05
15 Sep 20216.42%−0.20
31 Aug 20216.62%−0.13
13 Aug 20216.75%−0.21
30 Jul 20216.96%−0.77
15 Jul 20217.73%+0.31
30 Jun 20217.42%−0.25
15 Jun 20217.67%+0.42
28 May 20217.25%+0.63
14 May 20216.62%−0.07
30 Apr 20216.69%−0.68
15 Apr 20217.37%+1.29
31 Mar 20216.08%+2.50
15 Mar 20213.58%−0.80
26 Feb 20214.38%+0.06
12 Feb 20214.32%−0.10
29 Jan 20214.42%+0.26
15 Jan 20214.16%0.00
31 Dec 20204.16%+0.98
15 Dec 20203.18%−0.10
30 Nov 20203.28%+0.20
13 Nov 20203.08%+0.16
30 Oct 20202.92%+0.03
15 Oct 20202.89%−0.28
30 Sep 20203.17%+0.06
15 Sep 20203.11%−0.17
31 Aug 20203.28%−0.19
14 Aug 20203.47%+0.33
31 Jul 20203.14%+0.49
15 Jul 20202.65%–

Newest first. Scroll inside the table for earlier dates, back to 15 Jul 2020.

Frequently asked questions

How shorted is Passage Bio, Inc. right now?
3.01% of Passage Bio, Inc.'s (PASG) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 2,470th 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 PASG'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 PASG's days to cover?
3.20 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.