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HowShorted

How shorted is OSI Systems, Inc.? OSIS

#393most shorted US stockof 3,805 ranked stocks, more shorted than 89%

13.31%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.44
5 reports (~10 weeks)
−0.55
days to cover
8.23
Aggregate net short position time series for OSI Systems, 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 OSI Systems, 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
20 Aug 202612.34% 14 Aug 202612.87% 31 Aug 2026+0.53
4 May 202612.52% 30 Apr 202613.50% 15 May 2026+0.98
29 Jan 202611.12% 15 Jan 202611.97% 30 Jan 2026+0.85
30 Oct 202511.37% 15 Oct 202511.17% 31 Oct 2025−0.20
21 Aug 202512.62% 15 Aug 202512.50% 29 Aug 2025−0.12
1 May 202514.21% 30 Apr 202512.25% 15 May 2025−1.96
23 Jan 202513.19% 15 Jan 202512.28% 31 Jan 2025−0.91
24 Oct 20247.92% 15 Oct 202411.24% 31 Oct 2024+3.32

Fails to deliver

The SEC's fails-to-deliver figure for OSIS: 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
43
2 Sep 2026
Highest in window
12,359
23 Feb 2026
Days with a balance
86
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for OSI Systems, 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 12K shares.

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Sector: Technology

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202613.31%+0.44
31 Aug 202612.87%+0.53
14 Aug 202612.34%−0.34
31 Jul 202612.68%−0.28
15 Jul 202612.96%−0.90
30 Jun 202613.86%−0.55
15 Jun 202614.41%+0.78
29 May 202613.63%+0.13
15 May 202613.50%+0.98
30 Apr 202612.52%−0.01
15 Apr 202612.53%−0.39
31 Mar 202612.92%−0.72
13 Mar 202613.64%+0.12
27 Feb 202613.52%+1.18
13 Feb 202612.34%+0.37
30 Jan 202611.97%+0.85
15 Jan 202611.12%−0.84
31 Dec 202511.96%+0.16
15 Dec 202511.80%−0.02
28 Nov 202511.82%+0.68
14 Nov 202511.14%−0.03
31 Oct 202511.17%−0.20
15 Oct 202511.37%−0.67
30 Sep 202512.04%−0.03
15 Sep 202512.07%−0.43
29 Aug 202512.50%−0.12
15 Aug 202512.62%+0.17
31 Jul 202512.45%−0.15
15 Jul 202512.60%+0.03
30 Jun 202512.57%−0.06
13 Jun 202512.63%+0.54
30 May 202512.09%−0.16
15 May 202512.25%−1.96
30 Apr 202514.21%−0.03
15 Apr 202514.24%−0.50
31 Mar 202514.74%+0.33
14 Mar 202514.41%+3.12
28 Feb 202511.29%−0.75
14 Feb 202512.04%−0.24
31 Jan 202512.28%−0.91
15 Jan 202513.19%+0.08
31 Dec 202413.11%−0.22
13 Dec 202413.33%+0.43
29 Nov 202412.90%+1.05
15 Nov 202411.85%+0.61
31 Oct 202411.24%+3.32
15 Oct 20247.92%+0.43
30 Sep 20247.49%+0.91
13 Sep 20246.58%+1.77
30 Aug 20244.81%+0.58
15 Aug 20244.23%+0.40
31 Jul 20243.83%+1.63
15 Jul 20242.20%+0.19
28 Jun 20242.01%+0.18
14 Jun 20241.83%−0.02
31 May 20241.85%−0.04
15 May 20241.89%+0.12
30 Apr 20241.77%+0.10
15 Apr 20241.67%+0.05
28 Mar 20241.62%−0.21
15 Mar 20241.83%+0.12
29 Feb 20241.71%−0.09
15 Feb 20241.80%+0.27
31 Jan 20241.53%+0.02
12 Jan 20241.51%−0.02
29 Dec 20231.53%+0.16
15 Dec 20231.37%+0.14
30 Nov 20231.23%−0.32
15 Nov 20231.55%+0.21
31 Oct 20231.34%+0.48
13 Oct 20230.86%−0.32
29 Sep 20231.18%+0.02
15 Sep 20231.16%0.00
31 Aug 20231.16%−0.15
15 Aug 20231.31%−0.11
31 Jul 20231.42%+0.12
14 Jul 20231.30%−0.27
30 Jun 20231.57%−0.32
15 Jun 20231.89%−0.13
31 May 20232.02%−0.04
15 May 20232.06%+0.14
28 Apr 20231.92%+0.29
14 Apr 20231.63%0.00
31 Mar 20231.63%−0.15
15 Mar 20231.78%+0.16
28 Feb 20231.62%+0.11
15 Feb 20231.51%−0.11
31 Jan 20231.62%−0.06
13 Jan 20231.68%+0.03
30 Dec 20221.65%−0.22
15 Dec 20221.87%+0.12
30 Nov 20221.75%−0.18
15 Nov 20221.93%−0.15
31 Oct 20222.08%−0.06
14 Oct 20222.14%−0.03
30 Sep 20222.17%−0.37
15 Sep 20222.54%−0.50
31 Aug 20223.04%−0.07
15 Aug 20223.11%−0.73
29 Jul 20223.84%−0.31
15 Jul 20224.15%+0.23
30 Jun 20223.92%−0.56
15 Jun 20224.48%−0.09
31 May 20224.57%+0.32
13 May 20224.25%+0.03
29 Apr 20224.22%+0.41
14 Apr 20223.81%−0.35
31 Mar 20224.16%−0.03
15 Mar 20224.19%−0.04
28 Feb 20224.23%+0.05
15 Feb 20224.18%−0.40
31 Jan 20224.58%−0.77
14 Jan 20225.35%+0.04
31 Dec 20215.31%−0.14
15 Dec 20215.45%−0.59
30 Nov 20216.04%+0.07
15 Nov 20215.97%−0.33
29 Oct 20216.30%0.00
15 Oct 20216.30%+0.12
30 Sep 20216.18%−0.44
15 Sep 20216.62%−0.54
31 Aug 20217.16%+0.01
13 Aug 20217.15%+0.27
30 Jul 20216.88%+0.50
15 Jul 20216.38%+0.04
30 Jun 20216.34%+0.74
15 Jun 20215.60%+0.11
28 May 20215.49%+0.29
14 May 20215.20%−0.12
30 Apr 20215.32%+0.03
15 Apr 20215.29%−0.10
31 Mar 20215.39%+0.13
15 Mar 20215.26%−0.08
26 Feb 20215.34%+0.06
12 Feb 20215.28%−0.13
29 Jan 20215.41%−0.06
15 Jan 20215.47%+0.06
31 Dec 20205.41%−0.01
15 Dec 20205.42%+0.20
30 Nov 20205.22%−0.04
13 Nov 20205.26%+0.25
30 Oct 20205.01%−0.16
15 Oct 20205.17%+0.15
30 Sep 20205.02%−0.52
15 Sep 20205.54%−0.07
31 Aug 20205.61%−0.03
14 Aug 20205.64%+0.64
31 Jul 20205.00%+0.42
15 Jul 20204.58%+0.46
30 Jun 20204.12%−1.36
15 Jun 20205.48%−0.38
29 May 20205.86%−0.26
15 May 20206.12%−0.13
30 Apr 20206.25%+0.05
15 Apr 20206.20%+0.36
31 Mar 20205.84%−1.08
13 Mar 20206.92%−0.50
28 Feb 20207.42%−0.59
14 Feb 20208.01%−0.76
31 Jan 20208.77%+0.17
15 Jan 20208.60%−0.06
31 Dec 20198.66%+0.65
13 Dec 20198.01%−0.35
29 Nov 20198.36%0.00
15 Nov 20198.36%+0.01
31 Oct 20198.35%+0.26
15 Oct 20198.09%−0.45
30 Sep 20198.54%−0.07
13 Sep 20198.61%−0.08
30 Aug 20198.69%+2.21
15 Aug 20196.48%+0.70
31 Jul 20195.78%−0.91
15 Jul 20196.69%0.00
28 Jun 20196.69%+0.35
14 Jun 20196.34%+0.71
31 May 20195.63%+0.47
15 May 20195.16%−0.04
30 Apr 20195.20%+0.09
15 Apr 20195.11%−0.04
29 Mar 20195.15%−0.29
15 Mar 20195.44%−0.09
28 Feb 20195.53%−0.11
15 Feb 20195.64%+0.18
31 Jan 20195.46%−0.90
15 Jan 20196.36%−0.34
31 Dec 20186.70%−0.73
14 Dec 20187.43%−0.98
30 Nov 20188.41%−0.38
15 Nov 20188.79%−0.42
31 Oct 20189.21%−0.05
15 Oct 20189.26%+0.19
28 Sep 20189.07%−0.25
14 Sep 20189.32%+0.14
31 Aug 20189.18%+0.83
15 Aug 20188.35%−0.33
31 Jul 20188.68%+0.65
13 Jul 20188.03%−0.59
29 Jun 20188.62%−1.26
15 Jun 20189.88%+0.58
31 May 20189.30%−0.31
15 May 20189.61%−0.15
30 Apr 20189.76%+0.71
13 Apr 20189.05%+0.72
29 Mar 20188.33%+0.18
15 Mar 20188.15%−0.32
28 Feb 20188.47%−0.55
15 Feb 20189.02%+0.12
31 Jan 20188.90%−1.13
12 Jan 201810.03%+2.28
29 Dec 20177.75%–

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

Frequently asked questions

How shorted is OSI Systems, Inc. right now?
13.31% of OSI Systems, Inc.'s (OSIS) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 393rd 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 OSIS'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 OSIS's days to cover?
8.23 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.