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HowShorted

ATER short interest Nasdaq Capital Market

Aterian, Inc. Common Stock. 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
826,049
vs previous settlement
+609,737 (+281.9%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for ATER 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 ATER days to cover

Fails to deliver

The SEC's fails-to-deliver figure for ATER: 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
694
14 Sep 2026
Highest in window
1,241,370
29 Apr 2026
Days with a balance
55
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Aterian, Inc. Common Stock 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 1.2M shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026826,049+609,7371.00
31 Aug 2026216,312โˆ’67,2521.55
14 Aug 2026283,564โˆ’80,4791.01
31 Jul 2026364,043โˆ’58,7141.00
15 Jul 2026422,757+1,1792.39
30 Jun 2026421,578โˆ’35,0592.01
15 Jun 2026456,637โˆ’8,9202.74
29 May 2026465,557โˆ’1001.23
15 May 2026465,657โˆ’1,473,6851.00
30 Apr 20261,939,342+1,778,3241.00
15 Apr 2026161,018โˆ’103,4513.62
31 Mar 2026264,469+96,7196.86
13 Mar 2026167,750โˆ’14,6603.14
27 Feb 2026182,410+35,8572.48
13 Feb 2026146,553โˆ’144,6492.19
30 Jan 2026291,202+142,9782.57
15 Jan 2026148,224โˆ’140,7801.00
31 Dec 2025289,004+125,6653.62
15 Dec 2025163,339+20,8811.00
28 Nov 2025142,458โˆ’6,5821.64
14 Nov 2025149,040+11,8212.25
31 Oct 2025137,219โˆ’3,9992.30
15 Oct 2025141,218+13,2361.05
30 Sep 2025127,982โˆ’27,0311.12
15 Sep 2025155,013+32,0701.90
29 Aug 2025122,943โˆ’31,0561.22
15 Aug 2025153,999+12,1781.15
31 Jul 2025141,821โˆ’28,6491.98
15 Jul 2025170,470โˆ’51,6081.00
30 Jun 2025222,078โˆ’4,2711.00
13 Jun 2025226,349โˆ’10,8031.39
30 May 2025237,152โˆ’138,8101.28
15 May 2025375,962โˆ’10,2594.94
30 Apr 2025386,221+90,0854.84
15 Apr 2025296,136+18,2072.84
31 Mar 2025277,929+79,8761.00
14 Mar 2025198,053โˆ’42,1522.95
28 Feb 2025240,205โˆ’11,0585.63
14 Feb 2025251,263+50,9072.04
31 Jan 2025200,356โˆ’25,3246.26
15 Jan 2025225,680โˆ’17,8607.26
31 Dec 2024243,540โˆ’25,6243.68
13 Dec 2024269,164โˆ’16,8924.63
29 Nov 2024286,056+27,7353.09
15 Nov 2024258,321โˆ’6,5914.49
31 Oct 2024264,912โˆ’20,6288.18
15 Oct 2024285,540+22,3469.44
30 Sep 2024263,194โˆ’26,3854.86
13 Sep 2024289,579โˆ’10,9384.60
30 Aug 2024300,517โˆ’66,5004.09
15 Aug 2024367,017โˆ’21,0685.83
31 Jul 2024388,085โˆ’40,3536.24
15 Jul 2024428,438โˆ’201,2975.85
28 Jun 2024629,735+303,1641.39
14 Jun 2024326,571+21,9117.14
31 May 2024304,660โˆ’150,9293.51
15 May 2024455,589โˆ’65,8603.44
30 Apr 2024521,449โˆ’15,7245.03
15 Apr 2024537,173+96,6982.26
28 Mar 2024440,475โˆ’3,747,4402.41
15 Mar 20244,187,915+100,7744.54
29 Feb 20244,087,141โˆ’751,7035.08
15 Feb 20244,838,844+421,4135.14
31 Jan 20244,417,431โˆ’320,97217.85
12 Jan 20244,738,403โˆ’354,88014.48
29 Dec 20235,093,283+530,80810.86
15 Dec 20234,562,475โˆ’736,6759.35
30 Nov 20235,299,150+753,88716.64
15 Nov 20234,545,263โˆ’1,232,2067.33
31 Oct 20235,777,469โˆ’222,07315.79
13 Oct 20235,999,542+258,89912.06
29 Sep 20235,740,643โˆ’277,42314.94
15 Sep 20236,018,066โˆ’71,62716.35
31 Aug 20236,089,693โˆ’1,546,2918.23
15 Aug 20237,635,984+1,793,9984.71
31 Jul 20235,841,986โˆ’19,4214.73
14 Jul 20235,861,407+98,6673.91
30 Jun 20235,762,740โˆ’1,725,8682.73
15 Jun 20237,488,608+143,8699.36
31 May 20237,344,739โˆ’730,9185.68
15 May 20238,075,657โˆ’680,1557.41
28 Apr 20238,755,812โˆ’425,01114.26
14 Apr 20239,180,823โˆ’200,71613.12
31 Mar 20239,381,539+398,58914.54
15 Mar 20238,982,950+224,4709.81
28 Feb 20238,758,480+117,0378.56
15 Feb 20238,641,443+1,868,9344.25
31 Jan 20236,772,509โˆ’25,2361.01
13 Jan 20236,797,745+244,6039.75
30 Dec 20226,553,142โˆ’121,2156.10
15 Dec 20226,674,357โˆ’467,9506.98
30 Nov 20227,142,307โˆ’800,3217.91
15 Nov 20227,942,628+151,3285.11
31 Oct 20227,791,300+108,0615.29
14 Oct 20227,683,239+1,730,5992.14
30 Sep 20225,952,640โˆ’243,6452.05
15 Sep 20226,196,285+399,1744.20
31 Aug 20225,797,111โˆ’1,952,8723.36
15 Aug 20227,749,983โˆ’764,7382.77
29 Jul 20228,514,721โˆ’1,045,5585.97
15 Jul 20229,560,279+701,4844.61
30 Jun 20228,858,795+1,062,6032.68
15 Jun 20227,796,192โˆ’1,050,4752.06
31 May 20228,846,667โˆ’1,575,8391.67
13 May 202210,422,506โˆ’2,574,4251.00
29 Apr 202212,996,931+2,538,4341.00
14 Apr 202210,458,497+597,1271.00
31 Mar 20229,861,370+823,0412.54
15 Mar 20229,038,329+1,132,2473.32
28 Feb 20227,906,082+1,224,7633.96
15 Feb 20226,681,319โˆ’263,3643.81
31 Jan 20226,944,683+927,3652.01
14 Jan 20226,017,318โˆ’816,1391.75
31 Dec 20216,833,457+452,3982.11
15 Dec 20216,381,059+146,1281.56
30 Nov 20216,234,931+9,4911.44
15 Nov 20216,225,440+600,2071.00
29 Oct 20215,625,233โˆ’2,485,7541.00
15 Oct 20218,110,987+1,143,5651.00
30 Sep 20216,967,422โˆ’547,7341.00
15 Sep 20217,515,156+832,8991.00
31 Aug 20216,682,257+905,0291.00
13 Aug 20215,777,228+992,5971.83
30 Jul 20214,784,631+401,5177.44
15 Jul 20214,383,114โˆ’76,3816.24
30 Jun 20214,459,495+558,2615.29
15 Jun 20213,901,234สณโˆ’30,1514.94
28 May 20213,931,385+164,9314.16
14 May 20213,766,454โˆ’173,9932.74
30 Apr 20213,940,447โ€“4.53

Scroll inside the table for earlier settlements, back to 30 Apr 2021.

Questions

Frequently asked questions

What is ATER's short interest?
826,049 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 609,737 from the previous settlement.
Why is there no percentage for ATER?
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 ATER's days to cover?
1.00 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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