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HowShorted

How shorted is BIOMARIN PHARMACEUTICAL INC? BMRN

#1,609most shorted US stockof 3,805 ranked stocks, more shorted than 57%

5.21%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.11
5 reports (~10 weeks)
−1.99
days to cover
5.53
Aggregate net short position time series for BIOMARIN PHARMACEUTICAL 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 BIOMARIN PHARMACEUTICAL 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
6 Aug 20266.46% 31 Jul 20265.27% 14 Aug 2026−1.19
4 May 20265.58% 30 Apr 20265.88% 15 May 2026+0.30
23 Feb 20264.49% 13 Feb 20264.30% 27 Feb 2026−0.19
26 Jan 20263.85% 15 Jan 20264.12% 30 Jan 2026+0.27
12 Jan 20264.19% 31 Dec 20253.85% 15 Jan 2026−0.34
27 Oct 20254.43% 15 Oct 20255.13% 31 Oct 2025+0.70
7 Oct 20253.73% 30 Sep 20254.43% 15 Oct 2025+0.70
4 Aug 20252.68% 31 Jul 20252.58% 15 Aug 2025−0.10

Fails to deliver

The SEC's fails-to-deliver figure for BMRN: 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
47,834
2 Sep 2026
Highest in window
95,068
2 Dec 2025
Days with a balance
49
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for BIOMARIN PHARMACEUTICAL 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 95K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20265.21%+0.11
31 Aug 20265.10%−0.17
14 Aug 20265.27%−1.19
31 Jul 20266.46%−0.95
15 Jul 20267.41%+0.21
30 Jun 20267.20%+0.72
15 Jun 20266.48%+0.48
29 May 20266.00%+0.12
15 May 20265.88%+0.30
30 Apr 20265.58%+0.30
15 Apr 20265.28%+0.68
31 Mar 20264.60%+0.17
13 Mar 20264.43%+0.13
27 Feb 20264.30%−0.19
13 Feb 20264.49%+0.37
30 Jan 20264.12%+0.27
15 Jan 20263.85%−0.34
31 Dec 20254.19%−0.03
15 Dec 20254.22%−0.06
28 Nov 20254.28%−0.38
14 Nov 20254.66%−0.47
31 Oct 20255.13%+0.70
15 Oct 20254.43%+0.70
30 Sep 20253.73%−0.08
15 Sep 20253.81%+0.71
29 Aug 20253.10%+0.52
15 Aug 20252.58%−0.10
31 Jul 20252.68%−0.51
15 Jul 20253.19%−0.21
30 Jun 20253.40%+1.10
13 Jun 20252.30%+0.13
30 May 20252.17%−0.15
15 May 20252.32%−0.03
30 Apr 20252.35%−0.31
15 Apr 20252.66%+0.20
31 Mar 20252.46%−0.04
14 Mar 20252.50%+0.28
28 Feb 20252.22%−0.12
14 Feb 20252.34%−0.02
31 Jan 20252.36%+0.06
15 Jan 20252.30%−0.08
31 Dec 20242.38%−0.35
13 Dec 20242.73%−0.29
29 Nov 20243.02%+0.34
15 Nov 20242.68%−0.14
31 Oct 20242.82%−0.12
15 Oct 20242.94%+0.17
30 Sep 20242.77%−0.38
13 Sep 20243.15%+0.08
30 Aug 20243.07%−0.42
15 Aug 20243.49%−0.12
31 Jul 20243.61%−0.32
15 Jul 20243.93%−0.50
28 Jun 20244.43%+2.55
14 Jun 20241.88%+0.28
31 May 20241.60%−0.37
15 May 20241.97%−0.09
30 Apr 20242.06%+0.10
15 Apr 20241.96%+0.33
28 Mar 20241.63%+0.06
15 Mar 20241.57%−0.05
29 Feb 20241.62%−0.11
15 Feb 20241.73%+0.04
31 Jan 20241.69%−0.13
12 Jan 20241.82%−0.15
29 Dec 20231.97%−0.36
15 Dec 20232.33%+0.53
30 Nov 20231.80%+0.16
15 Nov 20231.64%−0.11
31 Oct 20231.75%−1.98
13 Oct 20233.73%+0.26
29 Sep 20233.47%−0.02
15 Sep 20233.49%+0.17
31 Aug 20233.32%+0.10
15 Aug 20233.22%−0.08
31 Jul 20233.30%−0.23
14 Jul 20233.53%+1.20
30 Jun 20232.33%−0.87
15 Jun 20233.20%−0.39
31 May 20233.59%−0.14
15 May 20233.73%+0.15
28 Apr 20233.58%+0.12
14 Apr 20233.46%+0.26
31 Mar 20233.20%−0.09
15 Mar 20233.29%−0.63
28 Feb 20233.92%+0.29
15 Feb 20233.63%+0.11
31 Jan 20233.52%−0.08
13 Jan 20233.60%−1.98
30 Dec 20225.58%−0.09
15 Dec 20225.67%+0.17
30 Nov 20225.50%+0.22
15 Nov 20225.28%−0.78
31 Oct 20226.06%−0.24
14 Oct 20226.30%+0.09
30 Sep 20226.21%+0.01
15 Sep 20226.20%+0.04
31 Aug 20226.16%+0.05
15 Aug 20226.11%−0.02
29 Jul 20226.13%+0.04
15 Jul 20226.09%−0.05
30 Jun 20226.14%−0.19
15 Jun 20226.33%+0.13
31 May 20226.20%−0.37
13 May 20226.57%+0.42
29 Apr 20226.15%−0.09
14 Apr 20226.24%+0.20
31 Mar 20226.04%+0.11
15 Mar 20225.93%−0.01
28 Feb 20225.94%+0.02
15 Feb 20225.92%+0.18
31 Jan 20225.74%−0.01
14 Jan 20225.75%+0.17
31 Dec 20215.58%−0.07
15 Dec 20215.65%+0.07
30 Nov 20215.58%+0.06
15 Nov 20215.52%−0.33
29 Oct 20215.85%−0.01
15 Oct 20215.86%−0.05
30 Sep 20215.91%−0.11
15 Sep 20216.02%+0.02
31 Aug 20216.00%+0.21
13 Aug 20215.79%+0.26
30 Jul 20215.53%−0.08
15 Jul 20215.61%−0.19
30 Jun 20215.80%−0.67
15 Jun 20216.47%−0.11
28 May 20216.58%+0.08
14 May 20216.50%+0.08
30 Apr 20216.42%+0.11
15 Apr 20216.31%+0.15
31 Mar 20216.16%+0.07
15 Mar 20216.09%−0.18
26 Feb 20216.27%+0.10
12 Feb 20216.17%−0.14
29 Jan 20216.31%+0.02
15 Jan 20216.29%+0.13
31 Dec 20206.16%−0.30
15 Dec 20206.46%−0.08
30 Nov 20206.54%−0.10
13 Nov 20206.64%+0.21
30 Oct 20206.43%+0.27
15 Oct 20206.16%−0.28
30 Sep 20206.44%+0.79
15 Sep 20205.65%−0.03
31 Aug 20205.68%+0.03
14 Aug 20205.65%+0.16
31 Jul 20205.49%−0.09
15 Jul 20205.58%−0.25
30 Jun 20205.83%+0.38
15 Jun 20205.45%−0.01
29 May 20205.46%+0.40
15 May 20205.06%+0.57
30 Apr 20204.49%−0.13
15 Apr 20204.62%−0.32
31 Mar 20204.94%−0.58
13 Mar 20205.52%+0.48
28 Feb 20205.04%+0.30
14 Feb 20204.74%−0.11
31 Jan 20204.85%−0.11
15 Jan 20204.96%+0.11
31 Dec 20194.85%+0.61
13 Dec 20194.24%−0.18
29 Nov 20194.42%−0.05
15 Nov 20194.47%+0.33
31 Oct 20194.14%−0.08
15 Oct 20194.22%−0.40
30 Sep 20194.62%+0.05
13 Sep 20194.57%−0.16
30 Aug 20194.73%−0.15
15 Aug 20194.88%−0.23
31 Jul 20195.11%+0.12
15 Jul 20194.99%−0.05
28 Jun 20195.04%+0.12
14 Jun 20194.92%−0.17
31 May 20195.09%+0.16
15 May 20194.93%−0.09
30 Apr 20195.02%−0.15
15 Apr 20195.17%+0.01
29 Mar 20195.16%−0.12
15 Mar 20195.28%+0.24
28 Feb 20195.04%−0.13
15 Feb 20195.17%−0.06
31 Jan 20195.23%−0.26
15 Jan 20195.49%−0.05
31 Dec 20185.54%−0.19
14 Dec 20185.73%0.00
30 Nov 20185.73%−0.18
15 Nov 20185.91%−0.21
31 Oct 20186.12%+0.13
15 Oct 20185.99%−0.06
28 Sep 20186.05%−0.13
14 Sep 20186.18%+0.04
31 Aug 20186.14%−0.50
15 Aug 20186.64%+0.14
31 Jul 20186.50%+0.24
13 Jul 20186.26%−0.16
29 Jun 20186.42%−0.21
15 Jun 20186.63%−0.51
31 May 20187.14%−0.01
15 May 20187.15%+0.29
30 Apr 20186.86%−0.03
13 Apr 20186.89%+0.49
29 Mar 20186.40%+0.24
15 Mar 20186.16%+0.19
28 Feb 20185.97%−0.12
15 Feb 20186.09%+0.33
31 Jan 20185.76%+0.19
12 Jan 20185.57%+0.08
29 Dec 20175.49%–

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

Frequently asked questions

How shorted is BIOMARIN PHARMACEUTICAL INC right now?
5.21% of BIOMARIN PHARMACEUTICAL INC's (BMRN) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 1,609th 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 BMRN'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 BMRN's days to cover?
5.53 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.