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HowShorted

How shorted is Emergent Biosolutions, Inc.? EBS

#147most shorted US stockof 3,805 ranked stocks, more shorted than 96%

19.09%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−2.06
5 reports (~10 weeks)
−0.81
days to cover
8.60
Aggregate net short position time series for Emergent Biosolutions, 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 Emergent Biosolutions, 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
5 Aug 202619.56% 31 Jul 202622.70% 14 Aug 2026+3.14
30 Apr 202618.36% 15 Apr 202618.61% 15 May 2026+0.25
26 Feb 202616.89% 13 Feb 202617.11% 27 Feb 2026+0.22
29 Oct 202516.55% 15 Oct 202515.65% 31 Oct 2025−0.90
6 Aug 202518.65% 31 Jul 202518.40% 15 Aug 2025−0.25
7 May 202514.29% 30 Apr 202514.58% 15 May 2025+0.29
3 Mar 202515.02% 28 Feb 202516.90% 14 Mar 2025+1.88
6 Nov 202412.82% 31 Oct 202412.57% 15 Nov 2024−0.25

Fails to deliver

The SEC's fails-to-deliver figure for EBS: 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.

Latest balance
414
14 Sep 2026
Highest in window
515,849
23 Jun 2026
Days with a balance
67
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Emergent Biosolutions, 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 516K 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 202619.09%−2.06
31 Aug 202621.15%−1.55
14 Aug 202622.70%+3.14
31 Jul 202619.56%−0.48
15 Jul 202620.04%+0.14
30 Jun 202619.90%+0.96
15 Jun 202618.94%+0.02
29 May 202618.92%+0.31
15 May 202618.61%−0.34
30 Apr 202618.95%+0.59
15 Apr 202618.36%−0.02
31 Mar 202618.38%+1.48
13 Mar 202616.90%−0.21
27 Feb 202617.11%+0.22
13 Feb 202616.89%+0.47
30 Jan 202616.42%−0.37
15 Jan 202616.79%−0.58
31 Dec 202517.37%+0.19
15 Dec 202517.18%+0.20
28 Nov 202516.98%−0.65
14 Nov 202517.63%+1.98
31 Oct 202515.65%−0.90
15 Oct 202516.55%−1.46
30 Sep 202518.01%+1.41
15 Sep 202516.60%+0.27
29 Aug 202516.33%−2.07
15 Aug 202518.40%−0.25
31 Jul 202518.65%+1.96
15 Jul 202516.69%−1.75
30 Jun 202518.44%+3.72
13 Jun 202514.72%+0.29
30 May 202514.43%−0.15
15 May 202514.58%+0.29
30 Apr 202514.29%−2.37
15 Apr 202516.66%+0.10
31 Mar 202516.56%−0.34
14 Mar 202516.90%+1.88
28 Feb 202515.02%+1.93
14 Feb 202513.09%+0.31
31 Jan 202512.78%−0.21
15 Jan 202512.99%−0.18
31 Dec 202413.17%+0.37
13 Dec 202412.80%+0.02
29 Nov 202412.78%+0.21
15 Nov 202412.57%−0.25
31 Oct 202412.82%−1.91
15 Oct 202414.73%−0.82
30 Sep 202415.55%+7.10
13 Sep 20248.45%+1.20
30 Aug 20247.25%+0.71
15 Aug 20246.54%−0.44
31 Jul 20246.98%−1.72
15 Jul 20248.70%−1.21
28 Jun 20249.91%−2.17
14 Jun 202412.08%+0.75
31 May 202411.33%−0.19
15 May 202411.52%−2.09
30 Apr 202413.61%+2.25
15 Apr 202411.36%+0.37
28 Mar 202410.99%+1.52
15 Mar 20249.47%−2.48
29 Feb 202411.95%−10.28
15 Feb 202422.23%+2.12
31 Jan 202420.11%−2.66
12 Jan 202422.77%+0.29
29 Dec 202322.48%+0.65
15 Dec 202321.83%+0.13
30 Nov 202321.70%+0.89
15 Nov 202320.81%−0.29
31 Oct 202321.10%+3.79
13 Oct 202317.31%+2.15
29 Sep 202315.16%−3.11
15 Sep 202318.27%+2.07
31 Aug 202316.20%−1.66
15 Aug 202317.86%+0.46
31 Jul 202317.40%+0.84
14 Jul 202316.56%+1.26
30 Jun 202315.30%+1.37
15 Jun 202313.93%+0.49
31 May 202313.44%+0.86
15 May 202312.58%−0.75
28 Apr 202313.33%−1.09
14 Apr 202314.42%−0.82
31 Mar 202315.24%+2.79
15 Mar 202312.45%+1.31
28 Feb 202311.14%−0.13
15 Feb 202311.27%0.00
31 Jan 202311.27%+0.54
13 Jan 202310.73%−0.43
30 Dec 202211.16%+4.32
15 Dec 20226.84%+2.15
30 Nov 20224.69%−0.46
15 Nov 20225.15%+0.83
31 Oct 20224.32%+0.25
14 Oct 20224.07%−0.41
30 Sep 20224.48%+0.37
15 Sep 20224.11%+0.20
31 Aug 20223.91%−2.09
15 Aug 20226.00%−1.08
29 Jul 20227.08%+0.23
15 Jul 20226.85%+0.40
30 Jun 20226.45%−0.24
15 Jun 20226.69%−0.74
31 May 20227.43%+0.78
13 May 20226.65%−0.63
29 Apr 20227.28%+1.28
14 Apr 20226.00%+0.37
31 Mar 20225.63%−0.52
15 Mar 20226.15%−1.18
28 Feb 20227.33%−0.38
15 Feb 20227.71%+0.84
31 Jan 20226.87%+0.34
14 Jan 20226.53%+0.34
31 Dec 20216.19%+1.09
15 Dec 20215.10%+0.18
30 Nov 20214.92%+1.90
15 Nov 20213.02%−2.66
29 Oct 20215.68%−0.31
15 Oct 20215.99%−0.09
30 Sep 20216.08%+0.13
15 Sep 20215.95%−0.25
31 Aug 20216.20%−0.40
13 Aug 20216.60%−0.33
30 Jul 20216.93%−0.06
15 Jul 20216.99%+0.31
30 Jun 20216.68%+1.13
15 Jun 20215.55%+0.43
28 May 20215.12%−0.88
14 May 20216.00%−1.03
30 Apr 20217.03%+0.51
15 Apr 20216.52%+1.64
31 Mar 20214.88%−0.03
15 Mar 20214.91%+0.25
26 Feb 20214.66%+0.17
12 Feb 20214.49%0.00
29 Jan 20214.49%−0.44
15 Jan 20214.93%−0.12
31 Dec 20205.05%+1.15
15 Dec 20203.90%+0.10
30 Nov 20203.80%+0.08
13 Nov 20203.72%−0.27
30 Oct 20203.99%+0.18
15 Oct 20203.81%−0.33
30 Sep 20204.14%−0.53
15 Sep 20204.67%−0.07
31 Aug 20204.74%−0.12
14 Aug 20204.86%−0.07
31 Jul 20204.93%−0.38
15 Jul 20205.31%+0.07
30 Jun 20205.24%+0.13
15 Jun 20205.11%+0.08
29 May 20205.03%+0.39
15 May 20204.64%+0.21
30 Apr 20204.43%−0.26
15 Apr 20204.69%+0.05
31 Mar 20204.64%+0.30
13 Mar 20204.34%+0.12
28 Feb 20204.22%−0.47
14 Feb 20204.69%−0.28
31 Jan 20204.97%−0.08
15 Jan 20205.05%+0.31
31 Dec 20194.74%+0.51
13 Dec 20194.23%−0.30
29 Nov 20194.53%+0.11
15 Nov 20194.42%−0.05
31 Oct 20194.47%−0.74
15 Oct 20195.21%−0.21
30 Sep 20195.42%−1.09
13 Sep 20196.51%−0.55
30 Aug 20197.06%−0.29
15 Aug 20197.35%+0.30
31 Jul 20197.05%−0.45
15 Jul 20197.50%+0.04
28 Jun 20197.46%+0.53
14 Jun 20196.93%+0.14
31 May 20196.79%−0.28
15 May 20197.07%+0.05
30 Apr 20197.02%+0.12
15 Apr 20196.90%+0.72
29 Mar 20196.18%+0.29
15 Mar 20195.89%−0.10
28 Feb 20195.99%+0.24
15 Feb 20195.75%−0.01
31 Jan 20195.76%+0.61
15 Jan 20195.15%+0.58
31 Dec 20184.57%+0.35
14 Dec 20184.22%−0.61
30 Nov 20184.83%+0.43
15 Nov 20184.40%+0.88
31 Oct 20183.52%−0.36
15 Oct 20183.88%−0.10
28 Sep 20183.98%+0.78
14 Sep 20183.20%−0.08
31 Aug 20183.28%−0.32
15 Aug 20183.60%−0.09
31 Jul 20183.69%−0.52
13 Jul 20184.21%−0.45
29 Jun 20184.66%+0.50
15 Jun 20184.16%+0.49
31 May 20183.67%−0.03
15 May 20183.70%−0.64
30 Apr 20184.34%−0.84
13 Apr 20185.18%+0.76
29 Mar 20184.42%+1.19
15 Mar 20183.23%−0.13
28 Feb 20183.36%+0.34
15 Feb 20183.02%+0.22
31 Jan 20182.80%−0.13
12 Jan 20182.93%−0.03
29 Dec 20172.96%–

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

Frequently asked questions

How shorted is Emergent Biosolutions, Inc. right now?
19.09% of Emergent Biosolutions, Inc.'s (EBS) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 147th 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 EBS'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 EBS's days to cover?
8.60 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.