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HowShorted

PST short interest NYSE Arca

ProShares Trust UltraShort Leh. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: exchange-traded product: its share count floats with creation and redemption.

Shares short
2,166
vs previous settlement
+795 (+58.0%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for PST: 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
528
14 Sep 2026
Highest in window
6,783
16 Jul 2026
Days with a balance
116
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for ProShares Trust UltraShort Leh 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 6.8K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20262,166+7951.00
31 Aug 20261,371โˆ’6,4881.00
14 Aug 20267,859โˆ’2,2881.54
31 Jul 202610,147โˆ’9,3981.75
15 Jul 202619,545+9,0592.78
30 Jun 202610,486+8,4062.80
15 Jun 20262,080โˆ’2,5751.00
29 May 20264,655+1,7361.00
15 May 20262,919+1,4841.00
30 Apr 20261,435โˆ’7,6861.00
15 Apr 20269,121+1571.00
31 Mar 20268,964โˆ’3,9811.00
13 Mar 202612,945+7,8321.00
27 Feb 20265,113+1,3571.00
13 Feb 20263,756+2271.00
30 Jan 20263,529+1,4431.00
15 Jan 20262,086+9851.00
31 Dec 20251,101โˆ’1,0831.00
15 Dec 20252,184+8951.00
28 Nov 20251,289โˆ’1,8751.00
14 Nov 20253,164+2,3801.00
31 Oct 2025784+1351.00
15 Oct 2025649โˆ’5,1041.00
30 Sep 20255,753+7131.00
15 Sep 20255,040+3,9351.04
29 Aug 20251,105โˆ’3431.05
15 Aug 20251,448+1251.00
31 Jul 20251,323+2391.00
15 Jul 20251,084โˆ’8371.00
30 Jun 20251,921โˆ’6,0841.00
13 Jun 20258,005โˆ’1,6851.62
30 May 20259,690โˆ’2,8161.77
15 May 202512,506+1,6131.18
30 Apr 202510,893โˆ’2,5321.13
15 Apr 202513,425+10,2261.00
31 Mar 20253,199โˆ’1,1781.00
14 Mar 20254,377+2,9421.00
28 Feb 20251,435โˆ’6,9521.00
14 Feb 20258,387โˆ’5,4441.12
31 Jan 202513,831โˆ’12,2501.06
15 Jan 202526,081+18,6251.35
31 Dec 20247,456โˆ’7091.17
13 Dec 20248,165โˆ’2,4852.88
29 Nov 202410,650โˆ’1,0272.07
15 Nov 202411,677+2,1101.00
31 Oct 20249,567โˆ’23,4131.36
15 Oct 202432,980+25,8061.20
30 Sep 20247,174โˆ’4311.00
13 Sep 20247,605+3,6101.30
30 Aug 20243,995+2421.00
15 Aug 20243,753+3,0071.00
31 Jul 2024746โˆ’20,8471.00
15 Jul 202421,593+13,0461.93
28 Jun 20248,547+3991.00
14 Jun 20248,148โˆ’26,9791.00
31 May 202435,127โˆ’27,8452.20
15 May 202462,972+26,0974.14
30 Apr 202436,875+9,9031.00
15 Apr 202426,972โˆ’37,9091.00
28 Mar 202464,881โˆ’70,9662.11
15 Mar 2024135,847โˆ’2694.80
29 Feb 2024136,116โˆ’11,3242.74
15 Feb 2024147,440+11,8983.77
31 Jan 2024135,542โˆ’2,8262.58
12 Jan 2024138,368+21,4082.35
29 Dec 2023116,960+1,6193.76
15 Dec 2023115,341โˆ’2,9453.66
30 Nov 2023118,286โˆ’1,4493.11
15 Nov 2023119,735สณโˆ’133,0841.94
31 Oct 2023252,819โˆ’83,0663.38
13 Oct 2023335,885+88,6004.70
29 Sep 2023247,285โˆ’30,5084.03
15 Sep 2023277,793+2,4273.00
31 Aug 2023275,366+36,4554.19
15 Aug 2023238,911+57,8195.72
31 Jul 2023181,092+32,6354.74
14 Jul 2023148,457+10,8182.09
30 Jun 2023137,639โˆ’51,2952.08
15 Jun 2023188,934+8,8863.14
31 May 2023180,048+45,6612.73
15 May 2023134,387+11,1632.15
28 Apr 2023123,224+1,2752.27
14 Apr 2023121,949โˆ’71,7751.36
31 Mar 2023193,724+33,5801.78
15 Mar 2023160,144+19,1191.19
28 Feb 2023141,025+12,4511.96
15 Feb 2023128,574โˆ’22,1471.79
31 Jan 2023150,721+21,9842.89
13 Jan 2023128,737โˆ’14,5291.49
30 Dec 2022143,266โˆ’113,9562.35
15 Dec 2022257,222โˆ’31,8342.96
30 Nov 2022289,056โˆ’63,1733.42
15 Nov 2022352,229+137,8523.01
31 Oct 2022214,377โˆ’224,4722.06
14 Oct 2022438,849+179,6242.95
30 Sep 2022259,225+35,2291.33
15 Sep 2022223,996+60,2231.00
31 Aug 2022163,773+4,3161.24
15 Aug 2022159,457โˆ’171,3511.33
29 Jul 2022330,808+105,0292.64
15 Jul 2022225,779+101,8661.78
30 Jun 2022123,913โˆ’387,8501.00
15 Jun 2022511,763+454,3491.13
31 May 202257,414โˆ’185,7761.00
13 May 2022243,190+114,6801.00
29 Apr 2022128,510โˆ’22,2271.00
14 Apr 2022150,737+79,2011.00
31 Mar 202271,536โˆ’60,1271.00
15 Mar 2022131,663โˆ’5,4341.00
28 Feb 2022137,097+89,6401.10
15 Feb 202247,457โˆ’72,9641.00
31 Jan 2022120,421+72,3301.00
14 Jan 202248,091+32,4471.00
31 Dec 202115,644โˆ’17,0461.00
15 Dec 202132,690+3,4171.00
30 Nov 202129,273โˆ’90,3611.00
15 Nov 2021119,634+106,5281.41
29 Oct 202113,106โˆ’56,0721.00
15 Oct 202169,178โˆ’94,5101.00
30 Sep 2021163,688+109,9052.25
15 Sep 202153,783โˆ’21,5351.06
31 Aug 202175,318โˆ’8,7321.71
13 Aug 202184,050+58,1371.19
30 Jul 202125,913+12,8241.00
15 Jul 202113,089โˆ’6,8021.00
30 Jun 202119,891โˆ’16,3521.00
15 Jun 202136,243โˆ’6,2511.00
28 May 202142,494+13,3731.09
14 May 202129,121+2,3831.00
30 Apr 202126,738โˆ’8,9101.00
15 Apr 202135,648+22,8501.30
31 Mar 202112,798โˆ’11,9801.00
15 Mar 202124,778โˆ’13,8191.00
26 Feb 202138,597+23,1271.00
12 Feb 202115,470โˆ’4,0331.22
29 Jan 202119,503โˆ’3332.10
15 Jan 202119,836โˆ’731.13
31 Dec 202019,909โˆ’21,1271.38
15 Dec 202041,036+13,9032.35
30 Nov 202027,133โˆ’6,7023.85
13 Nov 202033,835+15,4322.23
30 Oct 202018,403โˆ’3,9032.28
15 Oct 202022,306โˆ’4842.57
30 Sep 202022,790+1,9152.71
15 Sep 202020,875โˆ’4201.00
31 Aug 202021,295โˆ’1,5561.76
14 Aug 202022,851+2,0491.87
31 Jul 202020,802+6,1473.50
15 Jul 202014,655+651.63
30 Jun 202014,590โˆ’21,0291.14
15 Jun 202035,619+11,4111.21
29 May 202024,208+5125.32
15 May 202023,696โˆ’29,0572.87
30 Apr 202052,753โˆ’6,9545.19
15 Apr 202059,707โˆ’8,6442.05
31 Mar 202068,351+1,5701.90
13 Mar 202066,781+34,3401.00
28 Feb 202032,441+4,8641.12
14 Feb 202027,577+6,1901.58
31 Jan 202021,387+6,7331.72
15 Jan 202014,654+3,4121.00
31 Dec 201911,242โˆ’9891.00
13 Dec 201912,231โˆ’1,3001.00
29 Nov 201913,531+3621.01
15 Nov 201913,169+6151.00
31 Oct 201912,554โˆ’3,6791.00
15 Oct 201916,233โˆ’1,0121.00
30 Sep 201917,245โˆ’1,3011.59
13 Sep 201918,546โˆ’3,7861.06
30 Aug 201922,332+7,7172.05
15 Aug 201914,615+1,2561.00
31 Jul 201913,359+1,0511.00
15 Jul 201912,308โˆ’1,8281.00
28 Jun 201914,136โˆ’8,1741.00
14 Jun 201922,310โˆ’5,3411.00
31 May 201927,651โˆ’3,5712.33
15 May 201931,222+8,1511.78
30 Apr 201923,071โˆ’12,3391.19
15 Apr 201935,410+8,5311.40
29 Mar 201926,879โˆ’9,9811.00
15 Mar 201936,860โˆ’7,7342.96
28 Feb 201944,594+8,7731.00
15 Feb 201935,821โˆ’6,8651.26
31 Jan 201942,686+6,1511.00
15 Jan 201936,535+11,1351.00
31 Dec 201825,400โˆ’17,9311.00
14 Dec 201843,331+10,3791.00
30 Nov 201832,952โˆ’55,1091.00
15 Nov 201888,061โˆ’28,2251.48
31 Oct 2018116,286โˆ’316,8921.45
15 Oct 2018433,178+412,2733.84
28 Sep 201820,905+9,8861.00
14 Sep 201811,019โˆ’1281.00
31 Aug 201811,147โˆ’4151.00
15 Aug 201811,562โˆ’7,8991.00
31 Jul 201819,461+11,0271.00
13 Jul 20188,434โˆ’2,7391.00
29 Jun 201811,173โˆ’6,0251.00
15 Jun 201817,198+2,2131.00
31 May 201814,985+6,9321.00
15 May 20188,053โˆ’2161.00
30 Apr 20188,269โˆ’13,1221.00
13 Apr 201821,391+4,0911.00
29 Mar 201817,300โˆ’8,6971.00
15 Mar 201825,997โˆ’358,2801.00
28 Feb 2018384,277+354,7363.32
15 Feb 201829,541โˆ’170,0221.00
31 Jan 2018199,563+111,0082.23
12 Jan 201888,555+39,6101.41
29 Dec 201748,945โ€“1.00

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

Questions

Frequently asked questions

What is PST's short interest?
2,166 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 795 from the previous settlement.
Why is there no percentage for PST?
Because no defensible share count exists to divide by: exchange-traded product: its share count floats with creation and redemption. An exchange-traded product's share count changes every day as units are created and redeemed, so no filing gives a stable count to divide by. FINRA's shares-short figure is exact; a percentage of it would not be.
What is PST'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 funds by shares short and days to cover: most shorted ETFs. Other symbols with counts only: shares short without a percentage. Browse by name: US companies A to Z.