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HowShorted

How shorted was ACCELERON PHARMA INC? XLRN

ACCELERON PHARMA INC left the US market in 2021. This page is a frozen archive of its reported short interest, ending 15 Nov 2021. The ticker XLRN no longer refers to this company and may since have been reassigned.
2.20%
of shares outstanding reported short · settlement date 15 Nov 2021
vs previous report
−0.88
5 reports (~10 weeks)
−1.21
days to cover
2.05
Aggregate net short position time series for ACCELERON PHARMA 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 ACCELERON PHARMA 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 Nov 20213.08% 29 Oct 20212.20% 15 Nov 2021−0.88
27 Oct 20212.76% 15 Oct 20213.08% 29 Oct 2021+0.32
5 Aug 20213.50% 30 Jul 20213.44% 13 Aug 2021−0.06
28 Jul 20213.48% 15 Jul 20213.50% 30 Jul 2021+0.02
6 May 20213.95% 30 Apr 20214.60% 14 May 2021+0.65
29 Apr 20213.94% 15 Apr 20213.95% 30 Apr 2021+0.01
25 Feb 20213.64% 12 Feb 20213.67% 26 Feb 2021+0.03
4 Feb 20213.66% 29 Jan 20213.64% 12 Feb 2021−0.02
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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Nov 20212.20%−0.88
29 Oct 20213.08%+0.32
15 Oct 20212.76%−0.08
30 Sep 20212.84%−0.41
15 Sep 20213.25%−0.16
31 Aug 20213.41%−0.03
13 Aug 20213.44%−0.06
30 Jul 20213.50%+0.02
15 Jul 20213.48%−0.04
30 Jun 20213.52%−0.37
15 Jun 20213.89%−0.39
28 May 20214.28%−0.32
14 May 20214.60%+0.65
30 Apr 20213.95%+0.01
15 Apr 20213.94%−0.08
31 Mar 20214.02%−0.01
15 Mar 20214.03%+0.36
26 Feb 20213.67%+0.03
12 Feb 20213.64%−0.02
29 Jan 20213.66%−0.41
15 Jan 20214.07%−0.46
31 Dec 20204.53%−0.34
15 Dec 20204.87%−0.41
30 Nov 20205.28%−0.54
13 Nov 20205.82%−0.19
30 Oct 20206.01%−0.54
15 Oct 20206.55%+0.27
30 Sep 20206.28%+0.60
15 Sep 20205.68%+0.44
31 Aug 20205.24%−0.47
14 Aug 20205.71%+0.07
31 Jul 20205.64%−0.15
15 Jul 20205.79%−0.44
30 Jun 20206.23%−0.65
15 Jun 20206.88%−0.33
29 May 20207.21%+0.07
15 May 20207.14%−0.15
30 Apr 20207.29%−0.36
15 Apr 20207.65%+0.53
31 Mar 20207.12%+0.82
13 Mar 20206.30%−0.07
28 Feb 20206.37%−0.20
14 Feb 20206.57%−0.43
31 Jan 20207.00%−0.35
15 Jan 20207.35%−0.34
31 Dec 20197.69%−0.28
13 Dec 20197.97%−0.57
29 Nov 20198.54%+0.18
15 Nov 20198.36%+0.32
31 Oct 20198.04%−0.04
15 Oct 20198.08%+0.37
30 Sep 20197.71%−0.18
13 Sep 20197.89%+0.16
30 Aug 20197.73%−0.11
15 Aug 20197.84%+0.30
31 Jul 20197.54%+0.04
15 Jul 20197.50%−0.37
28 Jun 20197.87%−0.76
14 Jun 20198.63%−0.70
31 May 20199.33%+1.26
15 May 20198.07%−0.30
30 Apr 20198.37%+0.03
15 Apr 20198.34%−0.34
29 Mar 20198.68%+0.62
15 Mar 20198.06%+0.85
28 Feb 20197.21%−0.06
15 Feb 20197.27%−0.22
31 Jan 20197.49%−2.08
15 Jan 20199.57%+0.21
31 Dec 20189.36%−0.89
14 Dec 201810.25%−0.06
30 Nov 201810.31%+0.16
15 Nov 201810.15%−0.15
31 Oct 201810.30%+0.83
15 Oct 20189.47%−0.59
28 Sep 201810.06%+0.75
14 Sep 20189.31%+0.67
31 Aug 20188.64%+0.54
15 Aug 20188.10%+0.77
31 Jul 20187.33%+0.26
13 Jul 20187.07%−0.03
29 Jun 20187.10%+0.08
15 Jun 20187.02%+1.10
31 May 20185.92%−0.16
15 May 20186.08%+0.13
30 Apr 20185.95%−0.05
13 Apr 20186.00%−0.09
29 Mar 20186.09%0.00
15 Mar 20186.09%−0.14
28 Feb 20186.23%−0.27
15 Feb 20186.50%−0.05
31 Jan 20186.55%−0.44
12 Jan 20186.99%+0.20
29 Dec 20176.79%–

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

Frequently asked questions

How shorted was ACCELERON PHARMA INC?
ACCELERON PHARMA INC left the US market in 2021. Its final reported figure was 2.20% of shares outstanding for settlement date 15 Nov 2021, per FINRA's consolidated short interest report; this page preserves its full history.
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 XLRN'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 XLRN's days to cover?
2.05 days for settlement date 15 Nov 2021: 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.