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HowShorted

How shorted is Butterfly Network, Inc.? BFLY

#379most shorted US stockof 3,805 ranked stocks, more shorted than 90%

13.42%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.63
5 reports (~10 weeks)
+2.42
days to cover
8.43
Aggregate net short position time series for Butterfly Network, 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 Butterfly Network, 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
30 Jul 202611.96% 15 Jul 202612.28% 31 Jul 2026+0.32
30 Apr 20269.83% 15 Apr 20269.56% 15 May 2026−0.27
26 Feb 20269.86% 13 Feb 202611.62% 27 Feb 2026+1.76
12 Jan 202610.00% 31 Dec 202510.56% 15 Jan 2026+0.56
31 Oct 20257.27% 15 Oct 20257.05% 14 Nov 2025−0.22
1 Aug 20258.82% 31 Jul 20258.12% 15 Aug 2025−0.70
2 May 20255.50% 30 Apr 20255.55% 15 May 2025+0.05
28 Feb 20255.27% 14 Feb 20254.77% 14 Mar 2025−0.50

Fails to deliver

The SEC's fails-to-deliver figure for BFLY: 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
876
2 Sep 2026
Highest in window
4,914,298
23 Jul 2026
Days with a balance
115
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Butterfly Network, 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 4.9M shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202613.42%+0.63
31 Aug 202612.79%+0.71
14 Aug 202612.08%−0.20
31 Jul 202612.28%+0.32
15 Jul 202611.96%+0.96
30 Jun 202611.00%+1.10
15 Jun 20269.90%−0.49
29 May 202610.39%+0.83
15 May 20269.56%+0.32
30 Apr 20269.24%−0.59
15 Apr 20269.83%−0.01
31 Mar 20269.84%−0.33
13 Mar 202610.17%−1.45
27 Feb 202611.62%+1.76
13 Feb 20269.86%+0.67
30 Jan 20269.19%−1.37
15 Jan 202610.56%+0.56
31 Dec 202510.00%+0.59
15 Dec 20259.41%+1.19
28 Nov 20258.22%+1.17
14 Nov 20257.05%+0.09
31 Oct 20256.96%−0.31
15 Oct 20257.27%−0.60
30 Sep 20257.87%+0.35
15 Sep 20257.52%−0.02
29 Aug 20257.54%−0.58
15 Aug 20258.12%−0.70
31 Jul 20258.82%−1.36
15 Jul 202510.18%+0.18
30 Jun 202510.00%+3.40
13 Jun 20256.60%+0.67
30 May 20255.93%+0.38
15 May 20255.55%+0.05
30 Apr 20255.50%−0.17
15 Apr 20255.67%+0.30
31 Mar 20255.37%+0.60
14 Mar 20254.77%−0.30
28 Feb 20255.07%−0.20
14 Feb 20255.27%−1.78
31 Jan 20257.05%−1.54
15 Jan 20258.59%+0.55
31 Dec 20248.04%+0.33
13 Dec 20247.71%+0.56
29 Nov 20247.15%+1.19
15 Nov 20245.96%−0.25
31 Oct 20246.21%+0.09
15 Oct 20246.12%−0.01
30 Sep 20246.13%−0.68
13 Sep 20246.81%+0.10
30 Aug 20246.71%−0.04
15 Aug 20246.75%+0.18
31 Jul 20246.57%−0.25
15 Jul 20246.82%−3.56
28 Jun 202410.38%0.00
14 Jun 202410.38%+0.12
31 May 202410.26%−1.14
15 May 202411.40%+0.46
30 Apr 202410.94%+0.09
15 Apr 202410.85%+0.38
28 Mar 202410.47%+0.91
15 Mar 20249.56%+0.55
29 Feb 20249.01%+0.11
15 Feb 20248.90%+0.08
31 Jan 20248.82%+0.67
12 Jan 20248.15%+0.30
29 Dec 20237.85%−0.57
15 Dec 20238.42%−0.03
30 Nov 20238.45%−0.12
15 Nov 20238.57%−0.11
31 Oct 20238.68%−1.13
13 Oct 20239.81%−0.16
29 Sep 20239.97%−0.08
15 Sep 202310.05%−1.44
31 Aug 202311.49%−0.83
15 Aug 202312.32%+0.56
31 Jul 202311.76%+0.08
14 Jul 202311.68%−0.09
30 Jun 202311.77%−0.25
15 Jun 202312.02%−0.44
31 May 202312.46%−0.33
15 May 202312.79%+0.50
28 Apr 202312.29%+0.14
14 Apr 202312.15%+2.97
31 Mar 20239.18%+0.18
15 Mar 20239.00%−0.05
28 Feb 20239.05%+0.68
15 Feb 20238.37%−0.04
31 Jan 20238.41%−0.84
13 Jan 20239.25%+0.09
30 Dec 20229.16%−0.44
15 Dec 20229.60%+0.08
30 Nov 20229.52%+0.01
15 Nov 20229.51%−1.54
31 Oct 202211.05%−0.42
14 Oct 202211.47%−0.13
30 Sep 202211.60%−0.54
15 Sep 202212.14%+1.04
31 Aug 202211.10%+1.62
15 Aug 20229.48%−2.54
29 Jul 202212.02%+0.02
15 Jul 202212.00%+0.56
30 Jun 202211.44%−0.03
15 Jun 202211.47%+0.61
31 May 202210.86%−1.53
13 May 202212.39%+1.27
29 Apr 202211.12%+0.91
14 Apr 202210.21%+0.62
31 Mar 20229.59%+0.39
15 Mar 20229.20%−0.46
28 Feb 20229.66%−0.26
15 Feb 20229.92%−0.76
31 Jan 202210.68%−0.37
14 Jan 202211.05%−0.09
31 Dec 202111.14%−0.96
15 Dec 202112.10%+0.34
30 Nov 202111.76%+2.13
15 Nov 20219.63%−0.26
29 Oct 20219.89%+0.11
15 Oct 20219.78%−0.09
30 Sep 20219.87%+1.89
15 Sep 20217.98%+0.58
31 Aug 20217.40%−0.19
13 Aug 20217.59%−0.27
30 Jul 20217.86%−0.17
15 Jul 20218.03%−0.42
30 Jun 20218.45%+0.94
15 Jun 20217.51%+0.01
28 May 20217.50%+0.39
14 May 20217.11%–

Newest first. Scroll inside the table for earlier dates, back to 14 May 2021.

Frequently asked questions

How shorted is Butterfly Network, Inc. right now?
13.42% of Butterfly Network, Inc.'s (BFLY) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 379th 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 BFLY'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 BFLY's days to cover?
8.43 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.