SPRO
Spero Therapeutics, Inc.Company with tickers: SPRO
CIK
1701108
CUSIP
84833T103
Shares Outstanding
57,891,493
Price
Holdings
Short Volume
Short Interest
Fails to Deliver
SEC Filings
Earnings Calls
Insider Trading
Congress Trades
Short Interest History
| Settlement Date | Current Position | Previous Position | Change | Days to Cover |
|---|---|---|---|---|
| 2026-03-13 | 537,411 | 574,027 | -36,616 | 1.72 |
| 2026-02-27 | 574,027 | 715,694 | -141,667 | 2.12 |
| 2026-02-13 | 715,694 | 941,659 | -225,965 | 1.68 |
| 2026-01-30 | 941,659 | 1,039,613 | -97,954 | 4.01 |
| 2026-01-15 | 1,039,613 | 946,767 | +92,846 | 4.43 |
| 2025-12-31 | 946,767 | 1,056,013 | -109,246 | 3.85 |
| 2025-12-15 | 1,056,013 | 825,698 | +230,315 | 3.51 |
| 2025-11-28 | 825,698 | 615,735 | +209,963 | 2.14 |
| 2025-11-14 | 615,735 | 476,137 | +139,598 | 1.05 |
| 2025-10-31 | 476,137 | 315,715 | +160,422 | 1.00 |
| 2025-10-15 | 315,715 | 549,473 | -233,758 | 1.00 |
| 2025-09-30 | 549,473 | 458,620 | +90,853 | 2.06 |
| 2025-09-15 | 458,620 | 503,998 | -45,378 | 1.32 |
| 2025-08-29 | 503,998 | 927,158 | -423,160 | 1.35 |
| 2025-08-15 | 927,158 | 1,379,953 | -452,795 | 1.00 |
| 2025-07-31 | 1,379,953 | 1,217,101 | +162,852 | 2.25 |
| 2025-07-15 | 1,217,101 | 1,697,497 | -480,396 | 1.22 |
| 2025-06-30 | 1,697,497 | 1,612,678 | +84,819 | 1.24 |
| 2025-06-13 | 1,612,678 | 3,476,335 | -1,863,657 | 1.00 |
| 2025-05-30 | 3,476,335 | 636,730 | +2,839,605 | 1.00 |
| 2025-05-15 | 636,730 | 645,163 | -8,433 | 5.63 |
| 2025-04-30 | 645,163 | 801,304 | -156,141 | 8.23 |
| 2025-04-15 | 801,304 | 498,066 | +303,238 | 3.22 |
| 2025-03-31 | 498,066 | 437,248 | +60,818 | 3.45 |