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Biggest changes in US short interest over the past year

Where US short positions built and unwound most over the long windows, as of 15 Sep 2026. Changes are percentage points of the company. A company is compared only when it has a published figure at both ends of the window, so one that was absent on either date is left out rather than counted as zero.

Shorter windows (1, 5, 20 and 60 reports): US movers.

Past 12 months

From 15 Sep 2025 to 15 Sep 2026. 3,380 of 3,805 companies with a figure today also had one then; the 25 largest moves each way are shown.

Risers

  1. Ondas Inc.41.56%+34.68
  2. C4 Therapeutics, Inc.32.67%+27.69
  3. FUELCELL ENERGY INC31.14%+24.03
  4. Avalo Therapeutics, Inc.24.10%+23.68
  5. Q/C Technologies, Inc.23.25%+20.01
  6. NRX Pharmaceuticals, Inc.22.57%+19.12
  7. Digital Brands Group, Inc.19.31%+18.50
  8. One Stop Systems, Inc.18.85%+18.45
  9. SHOE STATION GROUP INC32.20%+18.16
  10. Inhibrx Biosciences, Inc.23.06%+18.08
  11. Surrozen, Inc.18.68%+17.57
  12. Serve Robotics Inc.37.00%+17.53
  13. Oragenics Inc.17.88%+17.07
  14. Wolfspeed, Inc.49.25%+16.95
  15. LENZ Therapeutics, Inc.33.83%+16.23
  16. Cohu, Inc.18.23%+15.55
  17. T1 Energy Inc.22.47%+15.25
  18. EverQuote, Inc.18.83%+15.10
  19. Opus Genetics, Inc.15.12%+14.97
  20. LIGHTPATH TECHNOLOGIES INC16.28%+14.82
  21. HERTZ GLOBAL HOLDINGS, INC32.51%+14.77
  22. FMC Corporation21.36%+14.73
  23. Vivakor, Inc.14.95%+14.68
  24. Beta Bionics, Inc.23.60%+14.67
  25. Better Home & Finance Holding17.60%+14.57

Fallers

  1. Strive, Inc.28.02%−28.92
  2. aTyr Pharma, Inc.10.88%−22.89
  3. Dauch Corporation7.79%−15.30
  4. AnaptysBio, Inc.18.68%−14.93
  5. Nakamoto Inc.5.63%−13.68
  6. ANAVEX LIFE SCIENCES CORP.15.46%−13.46
  7. SeaStar Medical Holding Corp2.76%−13.26
  8. Microbot Medical Inc.10.53%−12.80
  9. Coherus Oncology, Inc.14.79%−12.63
  10. ENDRA Life Sciences Inc.2.09%−11.93
  11. Byrna Technologies Inc.6.11%−11.74
  12. Instil Bio, Inc.2.39%−11.69
  13. SEALSQ Corp5.72%−11.50
  14. FuboTV Inc.5.69%−11.42
  15. Enveric Biosciences, Inc.0.51%−11.13
  16. Bloom Energy Corporation6.45%−11.00
  17. UTime Limited0.80%−10.96
  18. RTB Digital, Inc.1.50%−10.92
  19. Plug Power, Inc.20.56%−10.51
  20. Tao Synergies Inc.6.14%−10.36
  21. Humacyte, Inc.11.45%−10.24
  22. AXCELIS TECHNOLOGIES INC4.65%−10.21
  23. Interactive Strength, Inc.1.71%−9.70
  24. Avis Budget Group, Inc.13.31%−9.66
  25. Evolus, Inc.8.37%−9.66

2026 to date

From the last settlement date of 2025 (31 Dec 2025) to 15 Sep 2026. 3,465 of 3,805 companies with a figure today also had one then; the 25 largest moves each way are shown.

Risers

  1. Karyopharm Therapeutics Inc.34.68%+30.60
  2. C4 Therapeutics, Inc.32.67%+25.16
  3. Wolfspeed, Inc.49.25%+24.10
  4. SHOE STATION GROUP INC32.20%+21.60
  5. FUELCELL ENERGY INC31.14%+20.89
  6. Ondas Inc.41.56%+20.27
  7. One Stop Systems, Inc.18.85%+18.02
  8. Serve Robotics Inc.37.00%+16.48
  9. Digital Brands Group, Inc.19.31%+16.47
  10. Ocugen, Inc.31.28%+16.43
  11. Surrozen, Inc.18.68%+16.34
  12. NRX Pharmaceuticals, Inc.22.57%+16.05
  13. Century Therapeutics, Inc.16.21%+15.84
  14. LB Pharmaceuticals Inc17.41%+15.57
  15. Opus Genetics, Inc.15.12%+14.06
  16. HERTZ GLOBAL HOLDINGS, INC32.51%+14.03
  17. Jade Biosciences, Inc.17.27%+13.91
  18. Babcock & Wilcox Enterprises,16.17%+13.59
  19. New ERA Energy & Digital, Inc.24.76%+13.45
  20. EverQuote, Inc.18.83%+13.42
  21. EVERSPIN TECHNOLOGIES INC.15.14%+13.01
  22. Duos Technologies Group, Inc.18.09%+12.83
  23. EyePoint, Inc.22.98%+12.55
  24. Tenable Holdings, Inc.16.51%+12.36
  25. Turtle Beach Corp25.21%+12.23

Fallers

  1. Ascent Solar Technologies, Inc.9.18%−17.09
  2. Dauch Corporation7.79%−16.27
  3. Hyperion DeFi, Inc.7.99%−15.00
  4. aTyr Pharma, Inc.10.88%−14.65
  5. Cemtrex Inc.12.55%−14.18
  6. Acrivon Therapeutics, Inc.2.81%−14.07
  7. AMC ENTERTAINMENT HOLDINGS, INC.4.86%−13.25
  8. Fly-E Group, Inc.0.70%−11.90
  9. Amaze Holdings, Inc.7.01%−11.67
  10. Avis Budget Group, Inc.13.31%−11.64
  11. IonQ, Inc.10.63%−11.44
  12. Lifevantage Corporation9.08%−11.23
  13. Byrna Technologies Inc.6.11%−11.13
  14. Iovance Biotherapeutics, Inc.19.23%−10.77
  15. PETMED EXPRESS INC2.63%−10.00
  16. Delek US Holdings, Inc.8.91%−9.46
  17. Lumentum Holdings Inc.7.26%−9.32
  18. Coherus Oncology, Inc.14.79%−9.26
  19. Moderna, Inc.8.23%−9.26
  20. Kosmos Energy Ltd.4.77%−9.13
  21. PBF ENERGY INC.9.53%−8.89
  22. Tectonic Therapeutic, Inc.11.35%−8.63
  23. cbdMD, Inc.4.56%−8.55
  24. AXCELIS TECHNOLOGIES INC4.65%−8.29
  25. Outset Medical, Inc.4.73%−8.08

Frequently asked questions

Which US stock saw the biggest rise in short interest over the past year?
Ondas Inc.: up 34.68 percentage points to 41.56% as of 15 Sep 2026, per FINRA data. The full lists are on this page.
How are these changes calculated?
Each company's latest published figure is compared with its figure on the anchor date, or the nearest settlement date before it. Changes are percentage points of the company, not percent of the earlier figure. A company is compared only when it has a published figure at both ends; one that was absent on either date is left out rather than counted as zero.
Does a rise mean the stock will fall?
No. These are disclosed positions, published with a delay, and a position can be a hedge rather than a bet. Nothing here is investment advice and none of it predicts anything.