SPRO short interest
Spero Therapeutics Inc. · Healthcare · Biotechnology · settlement date 2026-09-30
| Shares short | 794,509 |
|---|---|
| Change vs prior report | -181,979 (-18.6%) |
| Change over six months | +31.3% |
| Days to cover | 1.00 (sector: 3.78) |
| Average daily volume | 1,144,097 |
| Rank in Healthcare | #779 of 922 by days to cover |
SPRO short interest, last 12 months
| Settlement | Shares short | Change | Days to cover | Avg daily volume |
|---|---|---|---|---|
| 2026-09-30 | 794,509 | -18.6% | 1.00 | 1,144,097 |
| 2026-09-15 | 976,488 | -19.3% | 3.06 | 319,458 |
| 2026-08-31 | 1,210,417 | -16.3% | 2.95 | 409,813 |
| 2026-08-14 | 1,445,879 | -4.5% | 1.90 | 760,511 |
| 2026-07-31 | 1,513,354 | -28.4% | 1.00 | 2,524,691 |
| 2026-07-15 | 2,113,935 | -26.2% | 1.28 | 1,649,627 |
| 2026-06-30 | 2,864,850 | +56.4% | 1.04 | 2,752,049 |
| 2026-06-15 | 1,831,713 | +7.3% | 2.25 | 813,375 |
| 2026-05-29 | 1,706,545 | +3.6% | 1.96 | 868,868 |
| 2026-05-15 | 1,647,297 | +39.6% | 2.61 | 630,469 |
| 2026-04-30 | 1,179,702 | +59.9% | 3.06 | 385,421 |
| 2026-04-15 | 737,720 | +21.9% | 1.39 | 531,221 |
| 2026-03-31 | 605,311 | +12.6% | 1.86 | 325,576 |
| 2026-03-13 | 537,411 | -6.4% | 1.72 | 312,939 |
| 2026-02-27 | 574,027 | -19.8% | 2.12 | 270,567 |
| 2026-02-13 | 715,694 | -24.0% | 1.68 | 426,955 |
| 2026-01-30 | 941,659 | -9.4% | 4.01 | 234,710 |
| 2026-01-15 | 1,039,613 | +9.8% | 4.43 | 234,737 |
| 2025-12-31 | 946,767 | -10.3% | 3.85 | 245,736 |
| 2025-12-15 | 1,056,013 | +27.9% | 3.51 | 300,621 |
| 2025-11-28 | 825,698 | +34.1% | 2.14 | 385,653 |
| 2025-11-14 | 615,735 | +29.3% | 1.05 | 584,142 |
| 2025-10-31 | 476,137 | +50.8% | 1.00 | 1,550,785 |
| 2025-10-15 | 315,715 | -42.5% | 1.00 | 535,376 |
| 2025-09-30 | 549,473 | +19.8% | 2.06 | 266,105 |
import finzdata as yf
yf.Ticker("SPRO").short_interest # every report since 2017
yf.Client().short_interest(["SPRO"], start="2018-01-01")Healthcare short interest · SPRO price history · Who owns SPRO · All short interest