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Biggest changes in Spanish short interest over the past year

Where Spanish short positions built and unwound most over the long windows, as of 12 Oct 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 days): Spanish movers.

Past 12 months

From 12 Oct 2025 to 12 Oct 2026. 22 of 30 companies with a figure today also had one then; the 25 largest moves each way are shown.

Risers

  1. EDREAMS ODIGEO, S.A.4.42%+3.92
  2. TECNICAS REUNIDAS, S.A.3.76%+2.59
  3. VISCOFAN, S.A.2.35%+1.78
  4. AMPER, S.A.2.60%+1.50
  5. LABORATORIOS FARMACEUTICOS ROVI, S.A.1.51%+0.71
  6. REDEIA CORPORACION, S.A.1.23%+0.63
  7. FLUIDRA, S.A.1.10%+0.60
  8. CELLNEX TELECOM, S.A.1.50%+0.50
  9. SACYR, S.A.1.81%+0.47
  10. SOLARIA ENERGIA Y MEDIOAMBIENTE, S.A.6.39%+0.19
  11. ENCE ENERGIA Y CELULOSA, S.A.1.48%+0.08
  12. GLOBAL DOMINION ACCESS, S.A.0.60%+0.02
  13. GRENERGY RENOVABLES, S.A.1.04%+0.01

Fallers

  1. ENAGAS, S.A.5.12%−3.86
  2. ORYZON GENOMICS, S.A.0.60%−1.78
  3. REPSOL, S.A.1.24%−1.56
  4. ACCIONA, S.A.1.12%−0.98
  5. TALGO, S.A.0.66%−0.57
  6. PHARMA MAR, S.A.0.52%−0.48
  7. GRIFOLS, S.A.1.81%−0.42
  8. ATRESMEDIA CORPORACION DE MEDIOS DE COMUNICACION, S.A.0.50%−0.22
  9. INDRA SISTEMAS, S.A.1.49%−0.21

2026 to date

From the last position date of 2025 (31 Dec 2025) to 12 Oct 2026. 22 of 30 companies with a figure today also had one then; the 25 largest moves each way are shown.

Risers

  1. TECNICAS REUNIDAS, S.A.3.76%+2.59
  2. VISCOFAN, S.A.2.35%+1.78
  3. AMPER, S.A.2.60%+1.70
  4. EDREAMS ODIGEO, S.A.4.42%+1.52
  5. SACYR, S.A.1.81%+1.13
  6. LABORATORIOS FARMACEUTICOS ROVI, S.A.1.51%+0.71
  7. FLUIDRA, S.A.1.10%+0.60
  8. CELLNEX TELECOM, S.A.1.50%+0.50
  9. GRENERGY RENOVABLES, S.A.1.04%+0.01

Fallers

  1. ENAGAS, S.A.5.12%−3.97
  2. ACCIONA, S.A.1.12%−1.59
  3. ORYZON GENOMICS, S.A.0.60%−1.47
  4. REPSOL, S.A.1.24%−0.96
  5. ATRESMEDIA CORPORACION DE MEDIOS DE COMUNICACION, S.A.0.50%−0.82
  6. REDEIA CORPORACION, S.A.1.23%−0.79
  7. GRIFOLS, S.A.1.81%−0.67
  8. PHARMA MAR, S.A.0.52%−0.57
  9. INDRA SISTEMAS, S.A.1.49%−0.53
  10. ENCE ENERGIA Y CELULOSA, S.A.1.48%−0.37
  11. SOLARIA ENERGIA Y MEDIOAMBIENTE, S.A.6.39%−0.08
  12. TALGO, S.A.0.66%−0.05

Frequently asked questions

Which Spanish stock saw the biggest rise in short interest over the past year?
EDREAMS ODIGEO, S.A.: up 3.92 percentage points to 4.42% as of 12 Oct 2026, per CNMV 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 position 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.