ASPN
Aspen Aerogels, Inc.
stockNYSE
At CloseNov 6, 2026 3:59:59 PM EST
4.91USD-4.845%(-0.25)1,854,937
Pre-marketNov 6, 2026 9:28:30 AM EST
5.18USD+0.388%(+0.02)
As of 2026-10-15, there were 6,145,901 shares short with a short interest of 8.01%.
ASPN Short Interest - Official
ASPN Short Position Change - Official
ASPN Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-10-15 | 8.01 | 6,145,901 | 7.64 | +44,269 | +0.73 | 82,988,784 | 76,697,404 |
| 2026-09-30 | 7.95 | 6,101,632 | 5.24 | -2,962,896 | -32.69 | 82,988,784 | 76,703,912 |
| 2026-09-15 | 11.82 | 9,064,528 | 13.93 | +660,787 | +7.86 | 82,988,784 | 76,703,912 |
| 2026-08-31 | 10.96 | 8,403,741 | 10.89 | +318,909 | +3.94 | 82,988,784 | 76,703,912 |
| 2026-08-14 | 10.54 | 8,084,832 | 3.22 | -764,432 | -8.64 | 82,988,784 | 76,703,912 |
| 2026-07-31 | 11.54 | 8,849,264 | 8.96 | +625,866 | +7.61 | 82,877,453 | 76,703,912 |
| 2026-07-15 | 10.72 | 8,223,398 | 8.41 | +1,121,324 | +15.79 | 82,877,453 | 76,703,912 |
| 2026-06-30 | 9.26 | 7,102,074 | 3.76 | -8,787 | -0.12 | 82,877,453 | 76,718,001 |
| 2026-06-15 | 9.27 | 7,110,861 | 5.78 | -625,150 | -8.08 | 82,877,453 | 76,677,391 |
| 2026-05-15 | 9.98 | 7,736,011 | 3.12 | -263,542 | -3.29 | 82,877,453 | 77,542,631 |
| 2026-04-30 | 10.37 | 7,999,553 | 5.02 | +981,678 | +13.99 | 82,825,603 | 77,113,032 |
| 2026-04-15 | 9.10 | 7,017,875 | 5.26 | +785,504 | +12.60 | 82,825,603 | 77,113,032 |
| 2026-03-31 | 8.08 | 6,232,371 | 5.33 | -822,463 | -11.66 | 82,825,603 | 77,113,032 |
| 2026-03-13 | 9.15 | 7,054,834 | 4.47 | -394,447 | -5.30 | 82,647,081 | 77,113,032 |
| 2026-02-27 | 9.66 | 7,449,281 | 3.04 | +17,044 | +0.23 | 82,647,081 | 77,113,032 |
| 2026-02-13 | 9.64 | 7,432,237 | 6.34 | -165,086 | -2.17 | 82,647,081 | 77,113,032 |
| 2026-01-30 | 9.85 | 7,597,323 | 4.86 | -1,132,820 | -12.98 | 82,647,081 | 77,113,032 |
| 2026-01-15 | 11.32 | 8,730,143 | 5.51 | -420,162 | -4.59 | 82,647,081 | 77,113,032 |
| 2025-12-31 | 11.87 | 9,150,305 | 4.01 | +773,273 | +9.23 | 82,647,081 | 77,113,032 |
| 2025-12-15 | 10.86 | 8,377,032 | 4.84 | -184,628 | -2.16 | 82,647,081 | 77,113,032 |
| 2025-11-28 | 11.10 | 8,561,660 | 3.89 | -1,108,190 | -11.46 | 82,647,081 | 77,113,032 |
| 2025-11-14 | 12.55 | 9,669,850 | 2.01 | +1,125,151 | +13.17 | 82,647,081 | 77,056,006 |
Historical data is split-adjusted.
1 Data from Finra. Finra publishes an updated file every two weeks.
2 Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.