Skip to content
HowShorted

BLDP short interest Nasdaq Global Market

Ballard Power Systems, Inc. Co. 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
20,900,393
vs previous settlement
+1,737,797 (+9.1%)
days to cover
6.40
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for BLDP: 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
36,305
10 Sep 2026
Highest in window
1,047,773
7 Oct 2025
Days with a balance
149
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Ballard Power Systems, Inc. Co 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 1.0M shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 202620,900,393+1,737,7976.40
31 Aug 202619,162,596+1,100,7557.39
14 Aug 202618,061,841+1,503,2674.92
31 Jul 202616,558,574โˆ’9,203,5782.16
15 Jul 202625,762,152+1,078,3674.93
30 Jun 202624,683,785+2,857,7153.39
15 Jun 202621,826,070+619,5492.38
29 May 202621,206,521โˆ’924,3761.53
15 May 202622,130,897+1,103,7991.72
30 Apr 202621,027,098+296,2884.58
15 Apr 202620,730,810+160,0067.11
31 Mar 202620,570,804โˆ’3,819,5515.84
13 Mar 202624,390,355+686,4735.56
27 Feb 202623,703,882โˆ’793,48512.91
13 Feb 202624,497,367+762,50910.38
30 Jan 202623,734,858+2,398,0576.97
15 Jan 202621,336,801+398,4806.48
31 Dec 202520,938,321โˆ’1,018,1077.20
15 Dec 202521,956,428+1,269,1045.79
28 Nov 202520,687,324สณ+6,630,9572.87
14 Nov 202514,056,367+252,1912.08
31 Oct 202513,804,176โˆ’315,8212.10
15 Oct 202514,119,997โˆ’44,4341.21
30 Sep 202514,164,431+1,197,1981.53
15 Sep 202512,967,233โˆ’494,0033.06
29 Aug 202513,461,236+295,1134.35
15 Aug 202513,166,123โˆ’1,761,5433.25
31 Jul 202514,927,666+315,2472.07
15 Jul 202514,612,419+250,1721.65
30 Jun 202514,362,247+584,5051.58
13 Jun 202513,777,742โˆ’6,697,6051.25
30 May 202520,475,347+2,786,9322.05
15 May 202517,688,415+594,6512.67
30 Apr 202517,093,764โˆ’1,565,2173.06
15 Apr 202518,658,981+422,4001.53
31 Mar 202518,236,581+2,400,5172.74
14 Mar 202515,836,064โˆ’1,187,4821.47
28 Feb 202517,023,546+1,599,8081.99
14 Feb 202515,423,738โˆ’2,219,1411.39
31 Jan 202517,642,879+1,647,5161.94
15 Jan 202515,995,363+696,3201.33
31 Dec 202415,299,043+715,3821.78
13 Dec 202414,583,661+1,906,9911.94
29 Nov 202412,676,670โˆ’736,5763.20
15 Nov 202413,413,246โˆ’354,7552.79
31 Oct 202413,768,001โˆ’745,6864.28
15 Oct 202414,513,687โˆ’754,0635.06
30 Sep 202415,267,750โˆ’3,839,0384.58
13 Sep 202419,106,788+1,134,8887.77
30 Aug 202417,971,900+586,8188.01
15 Aug 202417,385,082โˆ’2,818,7675.68
31 Jul 202420,203,849+306,7277.91
15 Jul 202419,897,122โˆ’2,694,9528.11
28 Jun 202422,592,074+2,100,9147.17
14 Jun 202420,491,160โˆ’1,081,58810.75
31 May 202421,572,748+237,11110.96
15 May 202421,335,637โˆ’1,764,2686.86
30 Apr 202423,099,905+683,2919.22
15 Apr 202422,416,614โˆ’581,5165.56
28 Mar 202422,998,130โˆ’190,99110.41
15 Mar 202423,189,121+334,9276.53
29 Feb 202422,854,194โˆ’648,2129.22
15 Feb 202423,502,406+147,5678.50
31 Jan 202423,354,839+77,6176.88
12 Jan 202423,277,222+908,3909.40
29 Dec 202322,368,832+72,37911.60
15 Dec 202322,296,453โˆ’365,9956.21
30 Nov 202322,662,448+111,85015.41
15 Nov 202322,550,598สณโˆ’2,002,2779.74
31 Oct 202324,552,875โˆ’3,226,0099.86
13 Oct 202327,778,884+697,39012.22
29 Sep 202327,081,494+378,89213.80
15 Sep 202326,702,602+36,25114.40
31 Aug 202326,666,351โˆ’907,75214.28
15 Aug 202327,574,103โˆ’318,7338.16
31 Jul 202327,892,836โˆ’4,348,39110.49
14 Jul 202332,241,227+276,0218.82
30 Jun 202331,965,206+41,10910.71
15 Jun 202331,924,097โˆ’2,110,9246.37
31 May 202334,035,021+2,862,15410.55
15 May 202331,172,867โˆ’704,88810.42
28 Apr 202331,877,755+450,92715.54
14 Apr 202331,426,828โˆ’138,01315.89
31 Mar 202331,564,841+2,063,3579.72
15 Mar 202329,501,484โˆ’460,12610.99
28 Feb 202329,961,610สณ+1,358,72614.34
15 Feb 202328,602,884โˆ’330,42712.62
31 Jan 202328,933,311โˆ’3,139,81310.35
13 Jan 202332,073,124โˆ’1,001,5839.52
30 Dec 202233,074,707+3,241,01510.97
15 Dec 202229,833,692+1,654,86510.07
30 Nov 202228,178,827+678,7939.88
15 Nov 202227,500,034โˆ’1,559,9635.88
31 Oct 202229,059,997โˆ’488,2608.42
14 Oct 202229,548,257+1,180,5829.10
30 Sep 202228,367,675+293,7659.59
15 Sep 202228,073,910+609,39310.43
31 Aug 202227,464,517+1,847,7538.80
15 Aug 202225,616,764โˆ’215,9954.79
29 Jul 202225,832,759+1,956,9665.65
15 Jul 202223,875,793โˆ’527,4625.98
30 Jun 202224,403,255โˆ’530,0176.73
15 Jun 202224,933,272โˆ’3,482,7826.71
31 May 202228,416,054โˆ’22,5245.80
13 May 202228,438,578+1,765,5075.19
29 Apr 202226,673,071+294,2567.04
14 Apr 202226,378,815+1,268,6158.51
31 Mar 202225,110,200โˆ’3,719,6735.18
15 Mar 202228,829,873โˆ’1,374,7214.75
28 Feb 202230,204,594โˆ’1,721,6256.26
15 Feb 202231,926,219+2,524,5936.36
31 Jan 202229,401,626+3,283,7055.12
14 Jan 202226,117,921+1,935,2715.93
31 Dec 202124,182,650โˆ’2,694,1346.11
15 Dec 202126,876,784+3,109,7086.18
30 Nov 202123,767,076โˆ’878,3667.41
15 Nov 202124,645,442+4,3975.37
29 Oct 202124,641,045โˆ’893,6785.77
15 Oct 202125,534,723+1,071,8186.77
30 Sep 202124,462,905+400,3348.58
15 Sep 202124,062,571+845,7977.83
31 Aug 202123,216,774+356,6886.45
13 Aug 202122,860,086โˆ’660,8018.38
30 Jul 202123,520,887+538,10510.36
15 Jul 202122,982,782+344,2806.78
30 Jun 202122,638,502โˆ’1,365,6706.85
15 Jun 202124,004,172สณโˆ’287,0856.28
28 May 202124,291,257+825,6495.20
14 May 202123,465,608+2,648,5343.02
30 Apr 202120,817,074+2,496,0114.61
15 Apr 202118,321,063+1,670,1164.78
31 Mar 202116,650,947โˆ’1,121,3763.90
15 Mar 202117,772,323+6,260,0542.18
26 Feb 202111,512,269โˆ’24,5821.73
12 Feb 202111,536,851+494,8042.20
29 Jan 202111,042,047โˆ’2,622,2651.65
15 Jan 202113,664,312โˆ’2,152,3191.62
31 Dec 202015,816,631+1,681,7322.69
15 Dec 202014,134,899โˆ’2,012,7723.48
30 Nov 202016,147,671โˆ’3,775,8582.30
13 Nov 202019,923,529+3,882,9125.85
30 Oct 202016,040,617โˆ’1,353,9637.40
15 Oct 202017,394,580+1,462,1654.67
30 Sep 202015,932,415+1,681,9634.27
15 Sep 202014,250,452+2,231,3723.49
31 Aug 202012,019,080+3,296,9002.19
14 Aug 20208,722,180+806,7732.19
31 Jul 20207,915,407+169,3872.22
15 Jul 20207,746,020โˆ’267,0401.64
30 Jun 20208,013,060โˆ’120,7152.97
15 Jun 20208,133,775โˆ’371,0722.62
29 May 20208,504,847+818,8685.41
15 May 20207,685,979สณ+24,7864.14
30 Apr 20207,661,193โˆ’136,9445.40
15 Apr 20207,798,137โˆ’347,3303.85
31 Mar 20208,145,467โˆ’1,604,6112.36
13 Mar 20209,750,078+811,2342.29
28 Feb 20208,938,844โˆ’223,8761.38
14 Feb 20209,162,720+861,3373.15
31 Jan 20208,301,383สณ+1,349,7911.73
15 Jan 20206,951,592+2,023,8721.81
31 Dec 20194,927,720โˆ’37,9875.07
13 Dec 20194,965,707โˆ’1,611,0643.73
29 Nov 20196,576,771โˆ’156,3273.11
15 Nov 20196,733,098โˆ’394,0054.18
31 Oct 20197,127,103+235,4234.16
15 Oct 20196,891,680+363,8817.64
30 Sep 20196,527,799+1,199,5803.81
13 Sep 20195,328,219โˆ’212,3073.31
30 Aug 20195,540,526โˆ’335,32410.42
15 Aug 20195,875,850โˆ’565,5704.45
31 Jul 20196,441,420โˆ’122,1458.45
15 Jul 20196,563,565+154,0756.96
28 Jun 20196,409,490โˆ’113,2888.09
14 Jun 20196,522,778+198,2597.46
31 May 20196,324,519+70,3334.26
15 May 20196,254,186โˆ’311,7686.55
30 Apr 20196,565,954+21,4919.07
15 Apr 20196,544,463โˆ’277,4909.78
29 Mar 20196,821,953โˆ’270,26611.76
15 Mar 20197,092,219+353,0758.84
28 Feb 20196,739,144โˆ’209,67912.25
15 Feb 20196,948,823+555,31313.18
31 Jan 20196,393,510โˆ’120,32010.90
15 Jan 20196,513,830+351,0759.60
31 Dec 20186,162,755โˆ’136,9488.83
14 Dec 20186,299,703+83,31413.54
30 Nov 20186,216,389โˆ’391,85514.17
15 Nov 20186,608,244โˆ’896,7384.79
31 Oct 20187,504,982โˆ’451,35012.41
15 Oct 20187,956,332+247,1267.57
28 Sep 20187,709,206+217,8464.14
14 Sep 20187,491,360โˆ’336,2775.71
31 Aug 20187,827,637โˆ’171,6057.66
15 Aug 20187,999,242+53,69615.40
31 Jul 20187,945,546+251,96412.30
13 Jul 20187,693,582โˆ’11,40517.70
29 Jun 20187,704,987+464,9688.63
15 Jun 20187,240,019+93,3638.49
31 May 20187,146,656+97,34415.13
15 May 20187,049,312โˆ’403,1647.58
30 Apr 20187,452,476โˆ’84,58811.12
13 Apr 20187,537,064โˆ’585,03510.57
29 Mar 20188,122,099+237,1006.96
15 Mar 20187,884,999+1,385,7943.84
28 Feb 20186,499,205+307,7583.87
15 Feb 20186,191,447+1,081,5392.92
31 Jan 20185,109,908+821,8531.23
12 Jan 20184,288,055+466,4602.64
29 Dec 20173,821,595โ€“3.76

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

Questions

Frequently asked questions

What is BLDP's short interest?
20,900,393 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 1,737,797 from the previous settlement.
Why is there no percentage for BLDP?
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 BLDP's days to cover?
6.40 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.