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Perma FIX Environmental Services Inc. short interest

3.5M shares of Perma FIX Environmental Services were sold short at the 15 October 2026 settlement, the most at any settlement since 29 Dec 2017, when our record starts. Short sellers would need 11.4 days of normal trading to buy them back.

Shares sold short3.5Mat 15 Oct 2026
Change on the settlement before+10.3%+128% over a year
Days to cover11.41at 309K shares a day
Of shares in issue16.66%shares short over shares outstanding
New to this? How to read this page
  1. Short interest is the number of shares investors have borrowed and sold, betting the price will fall, and not yet bought back.
  2. Days to cover is shares short over an average day's trading: how many days it would take short sellers to buy them all back. Above 5 or so is high.
  3. Rising short interest says more investors are betting against the stock. A crowded short can also rise fast if shorts rush to buy back.
  4. Brokers report it twice a month to FINRA, about ten days after each settlement date.
  5. What is short interest?

Short interest, days to cover and the price

Short interest is the most at any settlement since 29 Dec 2017, when our record starts, and the share price moved +1% over the last year.

Shares sold shortDays to coverShare price

Three charts on one timeline. Top: shares sold short at each settlement. Middle: days to cover, taller meaning shorts would need longer to buy back. Bottom: the share price, so you can see whether shorts added as the price fell or rose.

How it compares

every company on the site

    The bar ranks every company on the site from the lowest on the left to the highest on the right, in three equal thirds; the small figures under it are the values where each third starts, and the black tick is the middle company. The orange dot is this company; the grey ticks are the other companies in its industry (hover or tap for names). A hatched block is companies tied at none.

    Every settlement since 29 Dec 2017 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20263.5M+10.3%309K11.41
    30 September 20263.2M+19.9%394K8.13
    15 September 20262.7M+16.5%224K11.96
    31 August 20262.3M-17.5%327K7.03
    14 August 20262.8M+32.5%634K4.39
    31 July 20262.1M-9.3%626K3.35
    15 July 20262.3M+33.3%409K5.67
    30 June 20261.7M-10.0%389K4.47
    15 June 20261.9M+29.4%185K10.41
    29 May 20261.5M-1.0%250K5.95
    15 May 20261.5M+8.4%331K4.55
    30 April 20261.4M+4.2%104K13.33
    15 April 20261.3M-9.0%117K11.40
    31 March 20261.5M+21.6%268K5.48
    13 March 20261.2M+5.5%108K11.16
    27 February 20261.1M-4.9%135K8.48
    13 February 20261.2M-8.0%149K8.06
    30 January 20261.3M-5.3%142K9.22
    15 January 20261.4M-0.7%82K16.74
    31 December 20251.4M-8.9%104K13.28
    15 December 20251.5M+0.5%97K15.76
    28 November 20251.5M+4.8%103K14.69
    14 November 20251.4M-3.9%272K5.31
    31 October 20251.5M-3.2%201K7.46
    15 October 20251.6M+2.2%212K7.31
    30 September 20251.5M+9.6%255K5.96
    15 September 20251.4M+7.5%447K3.10
    29 August 20251.3M-2.8%98K13.18
    15 August 20251.3M+2.4%101K13.15
    31 July 20251.3M+7.9%167K7.75
    15 July 20251.2M+13.1%106K11.35
    30 June 20251.1M-3.6%139K7.67
    13 June 20251.1M-6.9%116K9.49
    30 May 20251.2M+5.7%139K8.50
    15 May 20251.1M+6.7%239K4.68
    30 April 20251.1M-4.0%141K7.45
    15 April 20251.1M+3.3%214K5.11
    31 March 20251.1M+4.2%230K4.61
    14 March 20251.0M-7.4%133K7.66
    28 February 20251.1M+12.6%141K7.81
    14 February 2025976K-0.0%100K9.77
    31 January 2025976K-8.7%114K8.55
    15 January 20251.1M+12.4%90K11.90
    31 December 2024951K-11.2%176K5.39
    13 December 20241.1M+2.3%130K8.21
    29 November 20241.0M+0.9%196K5.35
    15 November 20241.0M-3.2%167K6.20
    31 October 20241.1M-10.4%96K11.11
    15 October 20241.2M+1.2%69K17.29
    30 September 20241.2M+9.7%96K12.31
    13 September 20241.1M-6.7%73K14.72
    30 August 20241.2M-1.7%73K15.89
    15 August 20241.2M+20.7%142K8.28
    31 July 2024974K+15.8%152K6.38
    15 July 2024841K+87.0%138K6.08
    28 June 2024450K+51.5%340K1.32
    14 June 2024297K+14.8%98K3.02
    31 May 2024259K+25.3%100K2.60
    15 May 2024206K+109.1%157K1.32
    30 April 202499K+8.1%55K1.80
    15 April 202491K-48.2%88K1.03
    28 March 2024176K+16.3%58K3.06
    15 March 2024152K-9.1%54K2.81
    29 February 2024167K+8.4%35K4.70
    15 February 2024154K-7.6%20K7.78
    31 January 2024167K-7.5%21K7.93
    12 January 2024180K-1.5%35K5.17
    29 December 2023183K-0.1%33K5.51
    15 December 2023183K-17.7%39K4.71
    30 November 2023222K-7.6%87K2.56
    15 November 2023241K+4.5%67K3.61
    31 October 2023230K+4.3%41K5.65
    13 October 2023221K-11.9%50K4.39
    29 September 2023251K+15.5%67K3.73
    15 September 2023217K-4.1%33K6.57
    31 August 2023226K-12.5%52K4.32
    15 August 2023259K-8.5%84K3.08
    31 July 2023283K-9.9%53K5.36
    14 July 2023314K-6.1%37K8.56
    30 June 2023334K-4.9%54K6.16
    15 June 2023351K-13.2%66K5.31
    31 May 2023405K-8.3%58K7.02
    15 May 2023442K+6.1%87K5.06
    28 April 2023416K+31.1%89K4.69
    14 April 2023318K+7.4%247K1.29
    31 March 2023296K+233.7%201K1.47
    15 March 202389K+115.9%115K1.00
    28 February 202341K-9.5%62K1.00
    15 February 202345K+136.6%125K1.00
    31 January 202319K-15.3%26K1.00
    13 January 202323K+82.3%35K1.00
    30 December 202212K+64.7%40K1.00
    15 December 20228K-20.5%39K1.00
    30 November 20229K+30.1%16K1.00
    15 November 20227K-26.3%13K1.00
    31 October 202210K-9.2%18K1.00
    14 October 202211K-48.8%35K1.00
    30 September 202221K+54.4%25K1.00
    15 September 202214K+6.7%17K1.00
    31 August 202213K-23.5%7K1.97
    15 August 202217K+91.7%11K1.51
    29 July 20229K-29.3%11K1.00
    15 July 202212K+7.2%13K1.00
    30 June 202212K-41.7%5K2.14
    15 June 202220K+5.2%11K1.81
    31 May 202219K+107.1%8K2.45
    13 May 20229K-58.3%15K1.00
    29 April 202222K+170.4%17K1.32
    14 April 20228K-3.6%11K1.00
    31 March 20228K-44.8%19K1.00
    15 March 202215K-9.6%15K1.01
    28 February 202217K-18.8%13K1.33
    15 February 202221K-29.2%6K3.43
    31 January 202229K+49.1%11K2.70
    14 January 202220K+13.8%16K1.24
    31 December 202117K+170.3%20K1.00
    15 December 20216K-5.9%19K1.00
    30 November 20217K-4.3%35K1.00
    15 November 20217K-62.5%29K1.00
    29 October 202119K-20.2%17K1.09
    15 October 202124K+101.4%52K1.00
    30 September 202112K-9.5%19K1.00
    15 September 202113K+318.8%40K1.00
    31 August 20213K-40.0%7K1.00
    13 August 20215K+43.6%12K1.00
    30 July 20214K-89.0%15K1.00
    15 July 202133K+848.6%48K1.00
    30 June 20213K-70.5%24K1.00
    15 June 202112K-56.9%18K1.00
    28 May 202127K+90.7%17K1.62
    14 May 202114K-64.9%22K1.00
    30 April 202141K+140.7%36K1.11
    15 April 202117K-46.1%22K1.00
    31 March 202131K+233.4%53K1.00
    15 March 20219K-55.1%11K1.00
    26 February 202121K+291.8%37K1.00
    12 February 20215K-46.8%13K1.00
    29 January 202110K-48.2%22K1.00
    15 January 202119K+35.8%26K1.00
    31 December 202014K-3.4%31K1.00
    15 December 202015K+18.5%19K1.00
    30 November 202012K-3.1%26K1.00
    13 November 202013K-36.4%24K1.00
    30 October 202020K-10.0%13K1.55
    15 October 202022K+47.7%16K1.40
    30 September 202015K-34.1%7K2.10
    15 September 202023K-8.7%15K1.58
    31 August 202025K+61.6%18K1.39
    14 August 202016K-28.0%25K1.00
    31 July 202022K+24.4%31K1.00
    15 July 202017K-7.4%12K1.41
    30 June 202019K-17.8%51K1.00
    15 June 202023K-15.8%38K1.00
    29 May 202027K+11.3%19K1.46
    15 May 202024K+3.0%18K1.37
    30 April 202024K-1.9%16K1.51
    15 April 202024K+3.9%9K2.66
    31 March 202023K-14.4%51K1.00
    13 March 202027K+60.6%33K1.00
    28 February 202017K-49.4%43K1.00
    14 February 202033K+57.9%36K1.00
    31 January 202021K+36.3%48K1.00
    15 January 202016K-58.3%47K1.00
    31 December 201937K+35.6%74K1.00
    13 December 201927K+72.4%39K1.00
    29 November 201916K-30.7%61K1.00
    15 November 201923K+198.0%143K1.00
    31 October 20198K+7.4%18K1.00
    15 October 20197K-27.0%38K1.00
    30 September 201910K-9.7%24K1.00
    13 September 201911K-16.7%6K1.86
    30 August 201913K+25.3%10K1.30
    15 August 201910K-49.0%12K1.00
    31 July 201920K+107.1%8K2.49
    15 July 201910K-57.4%6K1.66
    28 June 201923K+166.5%12K1.87
    14 June 20199K-29.1%4K2.01
    31 May 201912K-7.4%15K1.00
    15 May 201913K+39.5%18K1.00
    30 April 201910K+25.2%23K1.00
    15 April 20198K-5.1%31K1.00
    29 March 20198K+3.8%11K1.00
    15 March 20198K+22.4%6K1.19
    28 February 20196K-20.1%13K1.00
    15 February 20198K-64.7%13K1.00
    31 January 201922K+162.8%12K1.89
    15 January 20199K-6.3%7K1.20
    31 December 20189K+6.7%25K1.00
    14 December 20189K-3.4%18K1.00
    30 November 20189K+191.1%4K2.19
    15 November 20183K+61.7%10K1.00
    31 October 20182K-42.9%9K1.00
    15 October 20183K-7.8%6K1.00
    28 September 20184K+38.0%7K1.00
    14 September 20183K+9.0%5K1.00
    31 August 20182K-57.9%3K1.00
    15 August 20186K+11.1%8K1.00
    31 July 20185K-21.4%11K1.00
    13 July 20186K-1.0%8K1.00
    29 June 20187K-3.1%11K1.00
    15 June 20187K+22.7%8K1.00
    31 May 20185K+36.8%19K1.00
    15 May 20184K+112.0%12K1.00
    30 April 20182K-31.4%15K1.00
    13 April 20183K+18.1%6K1.00
    29 March 20182K-42.1%10K1.00
    15 March 20184K-13.6%6K1.00
    28 February 20185K+133.0%5K1.00
    15 February 20182K-54.7%9K1.00
    31 January 20184K+22.2%17K1.00
    12 January 20184K-18.2%12K1.00
    29 December 20174K21K1.00
    Shares in millions (M) or thousands (K); hold the pointer on a figure for the exact count. FINRA publishes consolidated short interest twice a month, about ten days after each settlement.