Skip to content
HowShorted

HTOO short interest Nasdaq Capital Market

Fusion Fuel Green PLC Class A. 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
18,516
vs previous settlement
+8,368 (+82.5%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for HTOO: 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
10,810
11 Sep 2026
Highest in window
107,285
4 Dec 2025
Days with a balance
95
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Fusion Fuel Green PLC Class A 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 107K shares.

History

Every FINRA settlement we hold for HTOO, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 202618,516+8,3681.00
31 Aug 202610,148+2,4351.00
14 Aug 20267,713−4,4031.00
31 Jul 202612,116+4,3022.25
15 Jul 20267,814−1,3052.13
30 Jun 20269,119+1,2121.00
15 Jun 20267,907−7,5891.00
29 May 202615,496−19,2791.00
15 May 202634,775−2501.00
30 Apr 202635,025−21,5431.05
15 Apr 202656,568−34,7242.68
31 Mar 202691,292+10,7092.93
13 Mar 202680,583+31,6761.00
27 Feb 202648,907+14,2291.39
13 Feb 202634,678−16,1742.79
30 Jan 202650,852−33,9311.41
15 Jan 202684,783−50,4162.09
31 Dec 2025135,199+23,4251.00
15 Dec 2025111,774+32,5021.00
28 Nov 202579,272−16,4962.42
14 Nov 202595,768+4,9681.00
31 Oct 202590,800+34,0391.00
15 Oct 202556,761−68,9881.00
30 Sep 2025125,749+55,7291.00
15 Sep 202570,020+56,4031.00
29 Aug 202513,617−4,0721.00
15 Aug 202517,689−48,5901.00
31 Jul 202566,279+6,6501.00
15 Jul 202559,629−427,1741.00
30 Jun 2025486,803+461,0171.00
13 Jun 202525,786−27,3021.00
30 May 202553,088+18,8571.00
15 May 202534,231−37,6771.00
30 Apr 202571,908−119,3791.00
15 Apr 2025191,287+44,9131.00
31 Mar 2025146,374+49,5551.00
14 Mar 202596,819−54,8621.04
28 Feb 2025151,681+102,1231.00
14 Feb 202549,558+26,6791.00
31 Jan 202522,879+9,2781.00
15 Jan 202513,601−256,3431.00
31 Dec 2024269,944−722,9751.00
13 Dec 2024992,919+406,6621.00
29 Nov 2024586,257+132,3231.16
15 Nov 2024453,934+219,9561.00
31 Oct 2024233,978−61,5411.00
15 Oct 2024295,519+60,0632.37
30 Sep 2024235,456−12,9171.51
13 Sep 2024248,373+88,9482.84
30 Aug 2024159,425−73,6261.55
15 Aug 2024233,051+5,2314.04
31 Jul 2024227,820−31,8023.61
15 Jul 2024259,622−90,6502.55
28 Jun 2024350,272+22,1934.19
14 Jun 2024328,079+17,7402.72
31 May 2024310,339+13,4023.72
15 May 2024296,937+37,1533.57
30 Apr 2024259,784+3,0184.12
15 Apr 2024256,766+12,7942.35
28 Mar 2024243,972−102,7221.55
15 Mar 2024346,694−58,2611.00
29 Feb 2024404,955+149,7441.00
15 Feb 2024255,211−37,6172.79
31 Jan 2024292,828−5026.36
12 Jan 2024293,330−20,7345.90
29 Dec 2023314,064−17,2603.48
15 Dec 2023331,324−134,5691.47
30 Nov 2023465,893+186,1951.00
15 Nov 2023279,698+73,9802.15
31 Oct 2023205,718+6,1523.85
13 Oct 2023199,566−50,3421.12
29 Sep 2023249,908−111,6301.98
15 Sep 2023361,538−55,0472.14
31 Aug 2023416,585+62,9342.27
15 Aug 2023353,651−29,1663.52
31 Jul 2023382,817−65,9862.02
14 Jul 2023448,803+5,5493.57
30 Jun 2023443,254−22,8972.88
15 Jun 2023466,151+4,9542.73
31 May 2023461,197+56,0235.34
15 May 2023405,174−15,7889.45
28 Apr 2023420,962+8,8679.17
14 Apr 2023412,095−2,5675.38
31 Mar 2023414,662−15,3394.17
15 Mar 2023430,001+14,3495.07
28 Feb 2023415,652+94,4463.21
15 Feb 2023321,206+77,3683.23
31 Jan 2023243,838−42,1182.46
13 Jan 2023285,956+4,5543.82
30 Dec 2022281,402−40,9632.88
15 Dec 2022322,365−30,1241.67
30 Nov 2022352,489+225,1761.00
15 Nov 2022127,313−11,8421.00
31 Oct 2022139,155−6,3281.45
14 Oct 2022145,483−17,2571.51
30 Sep 2022162,740+7202.42
15 Sep 2022162,020−4,8132.54
31 Aug 2022166,833−1,6662.32
15 Aug 2022168,499−15,4522.92
29 Jul 2022183,951−65,3615.43
15 Jul 2022249,312−16,42210.74
30 Jun 2022265,734+15,0029.81
15 Jun 2022250,732−73,5346.34
31 May 2022324,266+2,5617.11
13 May 2022321,705−17,4465.67
29 Apr 2022339,151+52,7406.88
14 Apr 2022286,411+2,7863.73
31 Mar 2022283,625−52,1884.12
15 Mar 2022335,813+2032.46
28 Feb 2022335,610+56,0803.20
15 Feb 2022279,530−20,9902.94
31 Jan 2022300,520−110,8012.14
14 Jan 2022411,321+17,2579.98
31 Dec 2021394,064−114,5864.08
15 Dec 2021508,650+47,6787.03
30 Nov 2021460,972−15,0476.75
15 Nov 2021476,019−60,0998.62
29 Oct 2021536,118+40,27813.50
15 Oct 2021495,840−30,65310.57
30 Sep 2021526,493−78,2537.54
15 Sep 2021604,746+18,75511.62
31 Aug 2021585,991+58,4605.25
13 Aug 2021527,531−58,19512.50
30 Jul 2021585,726−78,3918.74
15 Jul 2021664,117−17,35313.13
30 Jun 2021681,470−34,18913.94
15 Jun 2021715,659+77,3636.08
28 May 2021638,296+49,4245.66
14 May 2021588,872+40,6425.35
30 Apr 2021548,230+15,6354.89
15 Apr 2021532,595+65,2294.63
31 Mar 2021467,366+208,8691.98
15 Mar 2021258,497+86,6451.00
26 Feb 2021171,852+29,8591.00
12 Feb 2021141,993+31,6681.00
29 Jan 2021110,325−7,3191.00
15 Jan 2021117,644+71,8511.00
31 Dec 202045,793−79,0921.00
15 Dec 2020124,885–1.08

Scroll inside the table for earlier settlements, back to 15 Dec 2020.

Questions

Frequently asked questions

What is HTOO's short interest?
18,516 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 8,368 from the previous settlement.
Why is there no percentage for HTOO?
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 HTOO'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.

Ranked companies with a percentage: most shorted US stocks. Other symbols with counts only: shares short without a percentage. Browse by name: US companies A to Z.