ATYR short interest
aTyr Pharma Inc. · Healthcare · Biotechnology · settlement date 2026-09-30
| Shares short | 12,893,008 |
|---|---|
| Change vs prior report | 2,224,851 (+20.9%) |
| Change over six months | -34.3% |
| Days to cover | 1.00 (sector: 3.78) |
| Average daily volume | 13,422,383 |
| Rank in Healthcare | #779 of 922 by days to cover |
ATYR short interest, last 12 months
| Settlement | Shares short | Change | Days to cover | Avg daily volume |
|---|---|---|---|---|
| 2026-09-30 | 12,893,008 | +20.9% | 1.00 | 13,422,383 |
| 2026-09-15 | 10,668,157 | +15.0% | 11.90 | 896,229 |
| 2026-08-31 | 9,279,033 | -1.7% | 16.07 | 577,421 |
| 2026-08-14 | 9,441,402 | -2.9% | 14.72 | 641,232 |
| 2026-07-31 | 9,726,056 | +17.5% | 11.76 | 826,988 |
| 2026-07-15 | 8,277,406 | -42.9% | 4.25 | 1,945,452 |
| 2026-06-30 | 14,505,076 | -21.6% | 5.07 | 2,861,016 |
| 2026-06-15 | 18,511,717 | -8.3% | 9.76 | 1,897,427 |
| 2026-05-29 | 20,188,406 | -5.6% | 5.01 | 4,028,884 |
| 2026-05-15 | 21,394,161 | +7.8% | 4.48 | 4,773,984 |
| 2026-04-30 | 19,845,053 | -0.2% | 25.28 | 785,086 |
| 2026-04-15 | 19,884,135 | +1.4% | 21.16 | 939,877 |
| 2026-03-31 | 19,617,163 | +3.4% | 19.59 | 1,001,204 |
| 2026-03-13 | 18,967,502 | +0.9% | 16.15 | 1,174,241 |
| 2026-02-27 | 18,802,360 | -5.4% | 11.60 | 1,620,457 |
| 2026-02-13 | 19,877,366 | -2.7% | 8.42 | 2,359,731 |
| 2026-01-30 | 20,432,971 | -4.2% | 7.72 | 2,646,935 |
| 2026-01-15 | 21,334,051 | -14.7% | 14.17 | 1,505,427 |
| 2025-12-31 | 25,013,857 | -17.7% | 11.13 | 2,246,751 |
| 2025-12-15 | 30,385,566 | +2.0% | 15.47 | 1,963,711 |
| 2025-11-28 | 29,801,092 | -0.2% | 9.24 | 3,224,234 |
| 2025-11-14 | 29,864,642 | -3.9% | 7.62 | 3,920,174 |
| 2025-10-31 | 31,060,738 | -14.1% | 6.08 | 5,105,955 |
| 2025-10-15 | 36,142,593 | -4.7% | 3.39 | 10,668,975 |
| 2025-09-30 | 37,932,369 | +14.6% | 1.80 | 21,114,048 |
import finzdata as yf
yf.Ticker("ATYR").short_interest # every report since 2017
yf.Client().short_interest(["ATYR"], start="2018-01-01")Healthcare short interest · ATYR price history · Who owns ATYR · All short interest