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HowShorted

FTEK short interest Nasdaq Capital Market

Fuel Tech, 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
362,655
vs previous settlement
+226,495 (+166.3%)
days to cover
1.18
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for FTEK: 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
15,629
10 Sep 2026
Highest in window
15,629
10 Sep 2026
Days with a balance
11
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Fuel Tech, 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 16K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026362,655+226,4951.18
31 Aug 2026136,160+24,4781.22
14 Aug 2026111,682+25,5421.00
31 Jul 202686,140โˆ’24,0721.00
15 Jul 2026110,212โˆ’88,8611.00
30 Jun 2026199,073+116,1011.00
15 Jun 202682,972+19,2641.00
29 May 202663,708โˆ’43,3481.00
15 May 2026107,056โˆ’6,8681.00
30 Apr 2026113,924+5,6271.00
15 Apr 2026108,297+9,0701.00
31 Mar 202699,227โˆ’1,2121.00
13 Mar 2026100,439+11,6591.00
27 Feb 202688,780โˆ’3,4361.00
13 Feb 202692,216โˆ’2,9541.00
30 Jan 202695,170โˆ’75,1141.00
15 Jan 2026170,284โˆ’112,8461.24
31 Dec 2025283,130โˆ’71,4151.32
15 Dec 2025354,545โˆ’18,4933.44
28 Nov 2025373,038โˆ’48,1432.09
14 Nov 2025421,181โˆ’164,8451.19
31 Oct 2025586,026โˆ’63,6993.20
15 Oct 2025649,725โˆ’64,9682.95
30 Sep 2025714,693+52,1181.98
15 Sep 2025662,575โˆ’44,9441.93
29 Aug 2025707,519โˆ’65,7202.78
15 Aug 2025773,239โˆ’14,4931.27
31 Jul 2025787,732+130,2602.82
15 Jul 2025657,472+112,6321.38
30 Jun 2025544,840+473,0361.00
13 Jun 202571,804โˆ’17,6111.00
30 May 202589,415โˆ’21,5781.00
15 May 2025110,993+17,0102.37
30 Apr 202593,983+5,8536.15
15 Apr 202588,130+8,2172.13
31 Mar 202579,913+13,4901.86
14 Mar 202566,423โˆ’7,4001.00
28 Feb 202573,823โˆ’9,7281.00
14 Feb 202583,551โˆ’16,2971.00
31 Jan 202599,848โˆ’30,6511.00
15 Jan 2025130,499โˆ’11,5091.00
31 Dec 2024142,008+79,7211.00
13 Dec 202462,287โˆ’2,5681.00
29 Nov 202464,855โˆ’32,6231.00
15 Nov 202497,478โˆ’73,3851.00
31 Oct 2024170,863โˆ’21,7514.22
15 Oct 2024192,614โˆ’9,1642.56
30 Sep 2024201,778โˆ’58,7953.03
13 Sep 2024260,573โˆ’56,5523.82
30 Aug 2024317,125+9,7552.98
15 Aug 2024307,370+4,9632.25
31 Jul 2024302,407โˆ’4,6038.45
15 Jul 2024307,010+34,0525.58
28 Jun 2024272,958+6165.68
14 Jun 2024272,342โˆ’3,0864.39
31 May 2024275,428โˆ’33,4224.43
15 May 2024308,850โˆ’63,5624.07
30 Apr 2024372,412โˆ’9,3726.31
15 Apr 2024381,784โˆ’33,3348.11
28 Mar 2024415,118โˆ’6,1574.26
15 Mar 2024421,275+73,2493.18
29 Feb 2024348,026โˆ’43,2246.38
15 Feb 2024391,250โˆ’96,2745.06
31 Jan 2024487,524+46,58311.79
12 Jan 2024440,941โˆ’14,87611.16
29 Dec 2023455,817โˆ’40,6777.78
15 Dec 2023496,494+50,68910.19
30 Nov 2023445,805โˆ’44,3849.49
15 Nov 2023490,189+40,94110.80
31 Oct 2023449,248โˆ’438.04
13 Oct 2023449,291โˆ’5,13115.04
29 Sep 2023454,422โˆ’56,9674.81
15 Sep 2023511,389+13,1967.45
31 Aug 2023498,193โˆ’6,4348.80
15 Aug 2023504,627โˆ’1,9216.08
31 Jul 2023506,548+3,14612.15
14 Jul 2023503,402+40,07110.62
30 Jun 2023463,331โˆ’38,4499.34
15 Jun 2023501,780+17,7646.61
31 May 2023484,016โˆ’58,1596.45
15 May 2023542,175โˆ’81,7805.71
28 Apr 2023623,955+89,4711.00
14 Apr 2023534,484+87414.58
31 Mar 2023533,610+49,99314.77
15 Mar 2023483,617โˆ’54,8666.10
28 Feb 2023538,483โˆ’3,09910.70
15 Feb 2023541,582โˆ’40,55111.46
31 Jan 2023582,133โˆ’5008.22
13 Jan 2023582,633โˆ’12,7193.62
30 Dec 2022595,352+20,7697.11
15 Dec 2022574,583+4,0404.78
30 Nov 2022570,543โˆ’5,64913.87
15 Nov 2022576,192โˆ’18,93110.61
31 Oct 2022595,123โˆ’34,00817.47
14 Oct 2022629,131โˆ’52,54615.76
30 Sep 2022681,677+36,61814.16
15 Sep 2022645,059โˆ’54,5147.28
31 Aug 2022699,573+151,1568.62
15 Aug 2022548,417โˆ’82,4504.05
29 Jul 2022630,867โˆ’79,04110.39
15 Jul 2022709,908โˆ’49,04113.73
30 Jun 2022758,949+66,5005.10
15 Jun 2022692,449โˆ’163,7239.00
31 May 2022856,172โˆ’128,23410.10
13 May 2022984,406+16,46010.06
29 Apr 2022967,946โˆ’90,6389.13
14 Apr 20221,058,584โˆ’231,9428.59
31 Mar 20221,290,526+242,84910.52
15 Mar 20221,047,677โˆ’81,8702.72
28 Feb 20221,129,547+223,9177.16
15 Feb 2022905,630+54,6626.94
31 Jan 2022850,968โˆ’302,2293.57
14 Jan 20221,153,197โˆ’37,9825.32
31 Dec 20211,191,179โˆ’257,2643.26
15 Dec 20211,448,443+399,8624.23
30 Nov 20211,048,581โˆ’865,0061.51
15 Nov 20211,913,587+74,0711.60
29 Oct 20211,839,516+1,053,8181.00
15 Oct 2021785,698โˆ’139,7882.24
30 Sep 2021925,486โˆ’114,4911.70
15 Sep 20211,039,977+37,1242.98
31 Aug 20211,002,853โˆ’249,6183.27
13 Aug 20211,252,471โˆ’32,4033.02
30 Jul 20211,284,874โˆ’46,6131.39
15 Jul 20211,331,487โˆ’52,3853.22
30 Jun 20211,383,872+339,9512.12
15 Jun 20211,043,921สณ+703,3621.00
28 May 2021340,559โˆ’150,4031.00
14 May 2021490,962โˆ’3851.00
30 Apr 2021491,347โˆ’332,4951.33
15 Apr 2021823,842โˆ’1,263,5231.15
31 Mar 20212,087,365โˆ’98,2826.18
15 Mar 20212,185,647โˆ’100,6493.46
26 Feb 20212,286,296+1,461,5612.32
12 Feb 2021824,735โˆ’11,9131.00
29 Jan 2021836,648+89,4481.00
15 Jan 2021747,200+82,0921.00
31 Dec 2020665,108โˆ’196,0541.00
15 Dec 2020861,162โˆ’1,926,4871.00
30 Nov 20202,787,649+717,7571.00
13 Nov 20202,069,892+2,014,6511.00
30 Oct 202055,241โˆ’2,5291.23
15 Oct 202057,770โˆ’84,5691.00
30 Sep 2020142,339+60,7731.00
15 Sep 202081,566โˆ’27,0911.30
31 Aug 2020108,657+60,9351.00
14 Aug 202047,722โˆ’16,2381.00
31 Jul 202063,960โˆ’46,2461.00
15 Jul 2020110,206+56,2421.00
30 Jun 202053,964โˆ’165,0251.00
15 Jun 2020218,989โˆ’277,8971.39
29 May 2020496,886โˆ’531,1593.40
15 May 20201,028,045+1,018,2981.00
30 Apr 20209,747โˆ’15,6161.00
15 Apr 202025,363+17,3961.00
31 Mar 20207,967+431.00
13 Mar 20207,924+9981.00
28 Feb 20206,926โˆ’561.00
14 Feb 20206,982โˆ’11,9541.00
31 Jan 202018,936โˆ’27,6101.00
15 Jan 202046,546+9,7421.67
31 Dec 201936,804โˆ’28,9991.00
13 Dec 201965,803+36,7171.55
29 Nov 201929,086โˆ’15,1491.00
15 Nov 201944,235+15,1511.00
31 Oct 201929,084+9,9061.00
15 Oct 201919,178โˆ’21,9021.08
30 Sep 201941,080+21,7181.00
13 Sep 201919,362โˆ’7721.00
30 Aug 201920,134โˆ’46,5931.00
15 Aug 201966,727โˆ’39,5791.00
31 Jul 2019106,306โˆ’77,6271.14
15 Jul 2019183,933โˆ’5,9893.49
28 Jun 2019189,922โˆ’93,1891.23
14 Jun 2019283,111+55,9182.28
31 May 2019227,193โˆ’137,3281.00
15 May 2019364,521+22,2251.04
30 Apr 2019342,296+148,7831.18
15 Apr 2019193,513+140,3201.00
29 Mar 201953,193+42,1771.00
15 Mar 201911,016โˆ’5,3041.00
28 Feb 201916,320โˆ’8,1041.00
15 Feb 201924,424โˆ’24,9681.00
31 Jan 201949,392+2,2701.00
15 Jan 201947,122+9541.12
31 Dec 201846,168โˆ’25,1571.04
14 Dec 201871,325โˆ’11,7832.17
30 Nov 201883,108+18,3083.26
15 Nov 201864,800โˆ’11,6371.00
31 Oct 201876,437+26,5772.61
15 Oct 201849,860โˆ’13,4341.49
28 Sep 201863,294โˆ’73,9031.39
14 Sep 2018137,197+28,9751.00
31 Aug 2018108,222+56,3652.04
15 Aug 201851,857+4,1221.66
31 Jul 201847,735โˆ’5693.47
13 Jul 201848,304โˆ’1,4701.45
29 Jun 201849,774+2,1351.09
15 Jun 201847,639โˆ’1,3531.38
31 May 201848,992โˆ’57,2611.58
15 May 2018106,25302.19
30 Apr 2018106,253โˆ’8,1464.83
13 Apr 2018114,399+10,0541.46
29 Mar 2018104,345โˆ’56,7211.29
15 Mar 2018161,066+54,1781.00
28 Feb 2018106,888+5,0055.58
15 Feb 2018101,883โˆ’34,3653.43
31 Jan 2018136,248+29,9175.73
12 Jan 2018106,331โˆ’2,0833.51
29 Dec 2017108,414โ€“1.00

Scroll inside the table for earlier settlements, back to 29 Dec 2017.

Questions

Frequently asked questions

What is FTEK's short interest?
362,655 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 226,495 from the previous settlement.
Why is there no percentage for FTEK?
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 FTEK's days to cover?
1.18 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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