ASPN short interest
Aspen Aerogels Inc. · Basic Materials · Chemicals - Specialty · settlement date 2026-09-30
| Shares short | 6,101,632 |
|---|---|
| Change vs prior report | -2,962,896 (-32.7%) |
| Change over six months | -2.1% |
| Days to cover | 5.24 (sector: 2.35) |
| Average daily volume | 1,164,371 |
| Rank in Basic Materials | #71 of 278 by days to cover |
ASPN short interest, last 12 months
| Settlement | Shares short | Change | Days to cover | Avg daily volume |
|---|---|---|---|---|
| 2026-09-30 | 6,101,632 | -32.7% | 5.24 | 1,164,371 |
| 2026-09-15 | 9,064,528 | +7.9% | 13.93 | 650,743 |
| 2026-08-31 | 8,403,741 | +3.9% | 10.89 | 771,420 |
| 2026-08-14 | 8,084,832 | -8.6% | 3.22 | 2,513,475 |
| 2026-07-31 | 8,849,264 | +7.6% | 8.96 | 988,038 |
| 2026-07-15 | 8,223,398 | +15.8% | 8.41 | 978,232 |
| 2026-06-30 | 7,102,074 | -0.1% | 3.76 | 1,887,633 |
| 2026-06-15 | 7,110,861 | +0.3% | 5.78 | 1,229,390 |
| 2026-05-29 | 7,089,306 | -8.4% | 4.62 | 1,534,207 |
| 2026-05-15 | 7,736,011 | -3.3% | 3.12 | 2,477,242 |
| 2026-04-30 | 7,999,553 | +14.0% | 5.02 | 1,592,856 |
| 2026-04-15 | 7,017,875 | +12.6% | 5.26 | 1,335,401 |
| 2026-03-31 | 6,232,371 | -11.7% | 5.33 | 1,170,117 |
| 2026-03-13 | 7,054,834 | -5.3% | 4.47 | 1,579,655 |
| 2026-02-27 | 7,449,281 | +0.2% | 3.04 | 2,452,316 |
| 2026-02-13 | 7,432,237 | -2.2% | 6.34 | 1,172,470 |
| 2026-01-30 | 7,597,323 | -13.0% | 4.86 | 1,562,950 |
| 2026-01-15 | 8,730,143 | -4.6% | 5.51 | 1,583,588 |
| 2025-12-31 | 9,150,305 | +9.2% | 4.01 | 2,284,399 |
| 2025-12-15 | 8,377,032 | -2.2% | 4.84 | 1,731,123 |
| 2025-11-28 | 8,561,660 | -11.5% | 3.89 | 2,198,480 |
| 2025-11-14 | 9,669,850 | +13.2% | 2.01 | 4,812,003 |
| 2025-10-31 | 8,544,699 | -0.4% | 4.82 | 1,771,318 |
| 2025-10-15 | 8,579,892 | -16.6% | 3.71 | 2,313,675 |
| 2025-09-30 | 10,285,318 | +12.7% | 7.09 | 1,450,327 |
import finzdata as yf
yf.Ticker("ASPN").short_interest # every report since 2017
yf.Client().short_interest(["ASPN"], start="2018-01-01")Basic Materials short interest · ASPN price history · Who owns ASPN · All short interest