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ERO short interest NYSE

Ero Copper Corp.. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: an SEC filer exists but no defensible share count is available yet.

Shares short
6,048,262
vs previous settlement
โˆ’505,050 (-7.7%)
days to cover
4.06
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for ERO shares short

Days to cover

FINRA's own figure: reported shares short divided by the security's average daily trading volume, published alongside each settlement.

Aggregate net short position time series for ERO days to cover

Fails to deliver

The SEC's fails-to-deliver figure for ERO: 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
8,083
8 Sep 2026
Highest in window
401,128
20 Jan 2026
Days with a balance
139
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Ero Copper Corp. 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 401K shares.

History

Every FINRA settlement we hold for ERO, newest first. สณ marks a figure FINRA itself flagged as revised.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20266,048,262โˆ’505,0504.06
31 Aug 20266,553,312+795,2253.69
14 Aug 20265,758,087+595,3763.59
31 Jul 20265,162,711+572,4075.97
15 Jul 20264,590,304+1,005,6464.71
30 Jun 20263,584,658+122,9892.91
15 Jun 20263,461,669+173,9392.34
29 May 20263,287,730โˆ’232,2163.09
15 May 20263,519,946+273,8462.03
30 Apr 20263,246,100โˆ’268,1393.36
15 Apr 20263,514,239+467,1703.13
31 Mar 20263,047,069โˆ’87,2822.83
13 Mar 20263,134,351โˆ’630,4742.34
27 Feb 20263,764,825โˆ’297,9802.34
13 Feb 20264,062,805โˆ’636,6251.99
30 Jan 20264,699,430+980,6151.60
15 Jan 20263,718,815+306,0871.92
31 Dec 20253,412,728+485,9743.16
15 Dec 20252,926,754+584,0852.41
28 Nov 20252,342,669สณโˆ’693,1612.36
14 Nov 20253,035,830โˆ’1,275,5993.31
31 Oct 20254,311,429โˆ’1,179,4084.88
15 Oct 20255,490,837+178,7854.07
30 Sep 20255,312,052+1,179,1875.58
15 Sep 20254,132,865โˆ’198,5404.88
29 Aug 20254,331,405โˆ’195,2777.68
15 Aug 20254,526,682โˆ’354,1647.77
31 Jul 20254,880,846+254,5656.14
15 Jul 20254,626,281+529,2634.41
30 Jun 20254,097,018+63,6737.44
13 Jun 20254,033,345โˆ’68,5918.46
30 May 20254,101,936+82,1078.99
15 May 20254,019,829โˆ’779,0858.73
30 Apr 20254,798,914+813,87610.25
15 Apr 20253,985,038โˆ’420,0965.99
31 Mar 20254,405,134โˆ’447,9999.65
14 Mar 20254,853,133โˆ’483,8599.07
28 Feb 20255,336,992+348,01411.45
14 Feb 20254,988,978+116,8297.21
31 Jan 20254,872,149+1,234,36914.24
15 Jan 20253,637,780+525,1997.10
31 Dec 20243,112,581+557,4608.48
13 Dec 20242,555,121+153,5195.87
29 Nov 20242,401,602+106,2927.20
15 Nov 20242,295,310โˆ’1,039,1354.31
31 Oct 20243,334,445+867,04112.63
15 Oct 20242,467,404โˆ’239,99110.33
30 Sep 20242,707,395โˆ’139,8018.31
13 Sep 20242,847,196โˆ’166,96510.06
30 Aug 20243,014,161+10,48811.09
15 Aug 20243,003,673+937,9478.97
31 Jul 20242,065,726+18,5176.99
15 Jul 20242,047,209+68,3588.99
28 Jun 20241,978,851โˆ’87,0076.94
14 Jun 20242,065,858+421,7595.41
31 May 20241,644,099+34,4093.78
15 May 20241,609,690โˆ’9,5513.74
30 Apr 20241,619,241โˆ’425,1243.36
15 Apr 20242,044,365+318,5374.82
28 Mar 20241,725,828+156,7816.71
15 Mar 20241,569,047โˆ’112,2073.49
29 Feb 20241,681,254+71,3465.52
15 Feb 20241,609,908+359,1156.57
31 Jan 20241,250,793โˆ’346,3183.75
12 Jan 20241,597,111โˆ’216,9217.45
29 Dec 20231,814,032+156,5238.47
15 Dec 20231,657,509+286,3454.28
30 Nov 20231,371,164+323,3103.51
15 Nov 20231,047,854โˆ’1,190,8122.16
31 Oct 20232,238,666+59,7829.63
13 Oct 20232,178,884โˆ’84,81012.78
29 Sep 20232,263,694โˆ’167,36913.89
15 Sep 20232,431,063+259,22313.58
31 Aug 20232,171,840+203,54014.79
15 Aug 20231,968,300+72,59714.28
31 Jul 20231,895,703+809,66012.13
14 Jul 20231,086,043โˆ’185,2748.84
30 Jun 20231,271,317โˆ’7,4169.77
15 Jun 20231,278,733+131,50111.80
31 May 20231,147,232+139,74210.24
15 May 20231,007,490+93,5368.63
28 Apr 2023913,954โˆ’73,8127.88
14 Apr 2023987,766โˆ’182,5837.92
31 Mar 20231,170,349โˆ’98,2339.91
15 Mar 20231,268,582+342,0357.53
28 Feb 2023926,547+15,18014.52
15 Feb 2023911,367โˆ’32,13513.16
31 Jan 2023943,502โˆ’600,3229.91
13 Jan 20231,543,824โˆ’141,91820.05
30 Dec 20221,685,742โˆ’19,05632.01
15 Dec 20221,704,798+38,13626.56
30 Nov 20221,666,662โˆ’90,74727.74
15 Nov 20221,757,409โˆ’121,03519.38
31 Oct 20221,878,444โˆ’9,76132.78
14 Oct 20221,888,205+162,97230.01
30 Sep 20221,725,233+482,17421.86
15 Sep 20221,243,059+49,84016.70
31 Aug 20221,193,219+119,63721.26
15 Aug 20221,073,582+93,4828.13
29 Jul 2022980,100+140,8829.34
15 Jul 2022839,218โˆ’60,2358.71
30 Jun 2022899,453+78,4498.57
15 Jun 2022821,004+26,7958.13
31 May 2022794,209+132,71910.54
13 May 2022661,490+73,2026.52
29 Apr 2022588,288+247,4317.55
14 Apr 2022340,857+198,2594.92
31 Mar 2022142,598โˆ’86,6952.72
15 Mar 2022229,293โˆ’106,7192.43
28 Feb 2022336,012+79,1536.27
15 Feb 2022256,859โˆ’285,5564.21
31 Jan 2022542,415+153,3395.56
14 Jan 2022389,076+5,3764.99
31 Dec 2021383,700โˆ’194,53318.06
15 Dec 2021578,233+218,98620.92
30 Nov 2021359,247+7,58122.34
15 Nov 2021351,666โˆ’78,40413.75
29 Oct 2021430,070โˆ’91,89124.41
15 Oct 2021521,961+7,19023.69
30 Sep 2021514,771โˆ’124,44120.19
15 Sep 2021639,212โˆ’6,02963.64
31 Aug 2021645,241โˆ’98,43834.53
13 Aug 2021743,679โˆ’9,32761.33
30 Jul 2021753,006+15,94789.75
15 Jul 2021737,059+20,02285.06
30 Jun 2021717,037โˆ’2,68463.91
15 Jun 2021719,721สณโ€“104.55

Scroll inside the table for earlier settlements, back to 15 Jun 2021.

Questions

Frequently asked questions

What is ERO's short interest?
6,048,262 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 505,050 from the previous settlement.
Why is there no percentage for ERO?
Because no defensible share count exists to divide by: an SEC filer exists but no defensible share count is available yet. The symbol maps to an SEC filer, but its share count cannot be used yet. A newly listed company needs two cover-page counts on file before the first is trusted; a split or an unexplained jump pauses publication until a fresh SEC count corroborates it; a secondary share class publishes under the company's primary line; and a foreign filer's short count is in depositary-share units. This page upgrades to a percentage automatically once a defensible count exists.
What is ERO's days to cover?
4.06 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume, published in the same file and shown verbatim. We hold no volume data ourselves.
Is this the short float?
No. This page shows FINRA's share count only. Short float divides that count by the public float, and short interest as we publish it elsewhere divides it by shares outstanding from SEC filings. Neither denominator is available for this line, so neither ratio is shown.
How often does this update?
FINRA member firms report short positions as of the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. We ingest each file the day it appears and re-read recent settlements for revisions.

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