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HowShorted

WPRT short interest Nasdaq Global Market

Westport Fuel Systems Inc Comm. 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
477,067
vs previous settlement
โˆ’85,366 (-15.2%)
days to cover
6.88
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for WPRT: 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
11,255
14 Sep 2026
Highest in window
656,893
22 Jun 2026
Days with a balance
77
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Westport Fuel Systems Inc Comm 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 657K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026477,067โˆ’85,3666.88
31 Aug 2026562,433โˆ’150,57111.20
14 Aug 2026713,004โˆ’108,4788.01
31 Jul 2026821,482+22,53414.40
15 Jul 2026798,948โˆ’66,8958.37
30 Jun 2026865,843+145,1261.00
15 Jun 2026720,717โˆ’3,28732.64
29 May 2026724,004โˆ’8,40228.03
15 May 2026732,406โˆ’18,06624.73
30 Apr 2026750,472โˆ’101,83813.13
15 Apr 2026852,310โˆ’28,30524.34
31 Mar 2026880,615โˆ’66,30424.31
13 Mar 2026946,919โˆ’11,74330.49
27 Feb 2026958,662โˆ’16,72332.65
13 Feb 2026975,385โˆ’13,82815.91
30 Jan 2026989,213+19,00611.33
15 Jan 2026970,207โˆ’25,9959.83
31 Dec 2025996,202+123,6458.70
15 Dec 2025872,557+61,25410.80
28 Nov 2025811,303+49,3999.60
14 Nov 2025761,904+16,02712.23
31 Oct 2025745,877+7,81512.32
15 Oct 2025738,062+17,3106.75
30 Sep 2025720,752+8,81414.84
15 Sep 2025711,938+19,55614.01
29 Aug 2025692,382โˆ’6,01933.03
15 Aug 2025698,401โˆ’2,40415.83
31 Jul 2025700,805+2,14328.49
15 Jul 2025698,662+69,48721.95
30 Jun 2025629,175+15,68931.06
13 Jun 2025613,486โˆ’2,69046.68
30 May 2025616,176โˆ’4,42561.72
15 May 2025620,601โˆ’2,80234.28
30 Apr 2025623,403โˆ’6,01946.07
15 Apr 2025629,422โˆ’3,14012.62
31 Mar 2025632,562+3,54423.63
14 Mar 2025629,018โˆ’1,54814.87
28 Feb 2025630,566โˆ’4,20322.68
14 Feb 2025634,769โˆ’18,85821.87
31 Jan 2025653,627โˆ’22,24110.53
15 Jan 2025675,868+4,07011.96
31 Dec 2024671,798+43,7544.78
13 Dec 2024628,044โˆ’8,18713.41
29 Nov 2024636,231โˆ’36,8509.26
15 Nov 2024673,081+63,2168.91
31 Oct 2024609,865+19,23510.39
15 Oct 2024590,630+83,69016.41
30 Sep 2024506,940+47,9856.17
13 Sep 2024458,955+13,03812.32
30 Aug 2024445,917+3,58225.98
15 Aug 2024442,335+9,85919.58
31 Jul 2024432,476+1,77530.09
15 Jul 2024430,701โˆ’16,66112.43
28 Jun 2024447,362+8,38514.29
14 Jun 2024438,977+22,10011.25
31 May 2024416,877โˆ’14,05115.22
15 May 2024430,928+11,0476.79
30 Apr 2024419,881โˆ’9010.60
15 Apr 2024419,971โˆ’69,5759.63
28 Mar 2024489,546+82,0614.75
15 Mar 2024407,485+49,2836.76
29 Feb 2024358,202+23,2728.00
15 Feb 2024334,930โˆ’6,55112.44
31 Jan 2024341,481+8,8287.33
12 Jan 2024332,653+86912.04
29 Dec 2023331,784โˆ’25,7615.55
15 Dec 2023357,545โˆ’9,08910.69
30 Nov 2023366,634โˆ’39,2328.06
15 Nov 2023405,866+35,3077.49
31 Oct 2023370,559+13,72912.82
13 Oct 2023356,830+38,4127.08
29 Sep 2023318,418+23,5758.96
15 Sep 2023294,843+8618.96
31 Aug 2023293,982+22,9277.41
15 Aug 2023271,055โˆ’24,4273.18
31 Jul 2023295,482โˆ’40,3722.33
14 Jul 2023335,854+81,9336.30
30 Jun 2023253,921+45,1596.11
15 Jun 2023208,762โˆ’2,225,3782.30
31 May 20232,434,140โˆ’30,3008.21
15 May 20232,464,440+269,1766.32
28 Apr 20232,195,264+117,9112.85
14 Apr 20232,077,353โˆ’34,9537.75
31 Mar 20232,112,306โˆ’289,4055.93
15 Mar 20232,401,711+265,6203.05
28 Feb 20232,136,091+3,4575.35
15 Feb 20232,132,634โˆ’267,7823.21
31 Jan 20232,400,416โˆ’58,6898.03
13 Jan 20232,459,105+70,8225.64
30 Dec 20222,388,283+39,2553.20
15 Dec 20222,349,028โˆ’43,0594.62
30 Nov 20222,392,087+42,1923.84
15 Nov 20222,349,895โˆ’109,4163.00
31 Oct 20222,459,311โˆ’48,8385.77
14 Oct 20222,508,149โˆ’352,4008.54
30 Sep 20222,860,549+181,6584.01
15 Sep 20222,678,891โˆ’71,5054.19
31 Aug 20222,750,396โˆ’189,0324.28
15 Aug 20222,939,428โˆ’81,5612.20
29 Jul 20223,020,989โˆ’169,4084.55
15 Jul 20223,190,397+67,5403.33
30 Jun 20223,122,857โˆ’9,8425.00
15 Jun 20223,132,699โˆ’1,018,8423.97
31 May 20224,151,541+323,4684.93
13 May 20223,828,073+221,5552.12
29 Apr 20223,606,518+456,5943.08
14 Apr 20223,149,924โˆ’204,2752.02
31 Mar 20223,354,199+179,4831.56
15 Mar 20223,174,716โˆ’262,0101.00
28 Feb 20223,436,726โˆ’191,8082.02
15 Feb 20223,628,534โˆ’15,9181.71
31 Jan 20223,644,452+231,1911.87
14 Jan 20223,413,261+141,1282.45
31 Dec 20213,272,133โˆ’991,6581.46
15 Dec 20214,263,791+130,3562.40
30 Nov 20214,133,435+355,2351.79
15 Nov 20213,778,200+413,3841.11
29 Oct 20213,364,816โˆ’17,6162.68
15 Oct 20213,382,432+153,9213.78
30 Sep 20213,228,511+821,0612.49
15 Sep 20212,407,450โˆ’573,2481.58
31 Aug 20212,980,698โˆ’783,4941.81
13 Aug 20213,764,192+567,9161.00
30 Jul 20213,196,276+625,8362.53
15 Jul 20212,570,440โˆ’298,8271.57
30 Jun 20212,869,267+881,4221.71
15 Jun 20211,987,845สณ+455,4651.00
28 May 20211,532,380โˆ’262,4921.85
14 May 20211,794,872+108,7771.00
30 Apr 20211,686,095โˆ’340,2291.00
15 Apr 20212,026,324โˆ’78,2421.56
31 Mar 20212,104,566+73,9821.00
15 Mar 20212,030,584+197,7511.00
26 Feb 20211,832,833โˆ’924,4751.00
12 Feb 20212,757,308+493,9611.00
29 Jan 20212,263,347โˆ’182,1591.00
15 Jan 20212,445,506โˆ’1,8141.00
31 Dec 20202,447,320+49,6721.00
15 Dec 20202,397,648โˆ’1,485,2451.00
30 Nov 20203,882,893โˆ’1,792,1031.00
13 Nov 20205,674,996โˆ’76,5173.15
30 Oct 20205,751,513+68,1035.85
15 Oct 20205,683,410+558,7292.71
30 Sep 20205,124,681+1,891,9741.00
15 Sep 20203,232,707+223,4643.60
31 Aug 20203,009,243+308,2972.78
14 Aug 20202,700,946+485,0041.47
31 Jul 20202,215,942+403,2301.46
15 Jul 20201,812,712โˆ’123,8601.06
30 Jun 20201,936,572+345,3292.84
15 Jun 20201,591,243โˆ’92,6861.34
29 May 20201,683,929+39,9711.58
15 May 20201,643,958+526,8091.15
30 Apr 20201,117,149โˆ’260,6421.12
15 Apr 20201,377,791+255,3301.56
31 Mar 20201,122,461+14,6721.00
13 Mar 20201,107,789โˆ’39,7081.55
28 Feb 20201,147,497โˆ’184,3751.97
14 Feb 20201,331,872+35,8354.69
31 Jan 20201,296,037สณ+604,0442.91
15 Jan 2020691,993+64,1191.37
31 Dec 2019627,874โˆ’80,6792.30
13 Dec 2019708,553+4,3381.49
29 Nov 2019704,215โˆ’135,0191.93
15 Nov 2019839,234โˆ’255,6111.05
31 Oct 20191,094,845+49,6213.94
15 Oct 20191,045,224+239,0302.27
30 Sep 2019806,194โˆ’30,5991.73
13 Sep 2019836,793โˆ’6,8441.52
30 Aug 2019843,637+156,8531.80
15 Aug 2019686,784โˆ’91,0571.00
31 Jul 2019777,841+59,2301.89
15 Jul 2019718,611+17,3371.03
28 Jun 2019701,274+101,1981.80
14 Jun 2019600,076โˆ’35,3931.14
31 May 2019635,469โˆ’123,5561.00
15 May 2019759,025โˆ’160,6811.00
30 Apr 2019919,706+13,8023.99
15 Apr 2019905,904+175,4972.03
29 Mar 2019730,407+31,6561.06
15 Mar 2019698,751โˆ’65,3331.20
28 Feb 2019764,084โˆ’106,1501.20
15 Feb 2019870,234+282,6031.00
31 Jan 2019587,631โˆ’58,8611.35
15 Jan 2019646,492โˆ’205,5671.03
31 Dec 2018852,059โˆ’364,5171.00
14 Dec 20181,216,576โˆ’277,4601.93
30 Nov 20181,494,036โˆ’25,3103.87
15 Nov 20181,519,346+12,4792.93
31 Oct 20181,506,867โˆ’18,2063.56
15 Oct 20181,525,073โˆ’220,0132.26
28 Sep 20181,745,086โˆ’48,4293.09
14 Sep 20181,793,515โˆ’482,5071.95
31 Aug 20182,276,022โˆ’102,5042.12
15 Aug 20182,378,526+99,4495.16
31 Jul 20182,279,077โˆ’172,1388.85
13 Jul 20182,451,215โˆ’79,2258.15
29 Jun 20182,530,440โˆ’148,0354.43
15 Jun 20182,678,475โˆ’37,6505.53
31 May 20182,716,125โˆ’144,7913.18
15 May 20182,860,916+169,8233.98
30 Apr 20182,691,093+89,6675.03
13 Apr 20182,601,426+35,3154.48
29 Mar 20182,566,111+95,4812.36
15 Mar 20182,470,630โˆ’337,8016.19
28 Feb 20182,808,431+352,9173.94
15 Feb 20182,455,514+51,7693.05
31 Jan 20182,403,745โˆ’124,1243.32
12 Jan 20182,527,869โˆ’227,9072.22
29 Dec 20172,755,776โ€“2.26

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

Questions

Frequently asked questions

What is WPRT's short interest?
477,067 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 85,366 from the previous settlement.
Why is there no percentage for WPRT?
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 WPRT's days to cover?
6.88 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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