SPRO News
Official issuer or fund updates, exact SEC current reports, and large established publisher coverage, newest first. Every lawfully retained item remains in the corpus; each public page contains at most 100 rows. Headlines open the exact source; summaries are concise descriptions and not investment recommendations. Captured 2026-08-31.
| Date | Type | Publisher | Headline | Summary |
|---|---|---|---|---|
| 2026-08-28 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.01,8.01,9.01. |
| 2026-08-12 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2026-07-14 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.01,2.03,7.01,8.01,9.01. |
| 2026-06-25 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,5.03,5.07,9.01. |
| 2026-06-22 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,8.01,9.01. |
| 2026-05-13 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2026-03-26 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2026-01-30 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,8.01. |
| 2025-12-19 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2025-11-13 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,7.01,9.01. |
| 2025-08-12 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,7.01,9.01. |
| 2025-06-18 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,5.07. |
| 2025-05-28 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,8.01,9.01. |
| 2025-05-13 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2025-04-28 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,9.01. |
| 2025-03-27 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2025-02-28 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 3.01. |
| 2025-01-10 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,5.02,7.01,8.01,9.01. |
| 2024-11-14 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2024-10-29 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,2.05,7.01,8.01,9.01. |
| 2024-09-10 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,9.01. |
| 2024-08-05 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,7.01,9.01. |
| 2024-06-03 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,5.07,9.01. |
| 2024-05-15 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2024-03-29 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01. |
| 2024-03-13 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2024-02-09 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2024-01-08 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,9.01. |
| 2024-01-05 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,7.01,8.01,9.01. |
| 2024-01-02 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,8.01,9.01. |
| 2023-11-13 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2023-11-01 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,8.01,9.01. |
| 2023-10-16 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K/A | Spero Therapeutics, Inc. filed Form 8-K/A covering items 5.03,5.07,9.01. |
| 2023-10-10 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,5.03,5.07,9.01. |
| 2023-08-10 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2023-07-31 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,8.01,9.01. |
| 2023-06-14 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,8.01,9.01. |
| 2023-05-11 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2023-03-30 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2023-02-01 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2023-01-09 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,7.01,8.01,9.01. |
| 2022-11-14 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2022-11-08 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2022-09-22 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.01,3.02,8.01,9.01. |
| 2022-09-19 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,5.07,9.01. |
| 2022-09-06 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2022-08-10 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2022-07-01 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2022-06-27 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2022-06-07 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.02,9.01. |
| 2022-05-16 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2022-05-03 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.05,5.02,8.01,9.01. |
| 2022-04-07 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2022-03-31 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2022-02-16 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2022-01-25 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,8.01,9.01. |
| 2022-01-19 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2022-01-04 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2021-11-10 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-10-28 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,8.01,9.01. |
| 2021-10-12 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,9.01. |
| 2021-09-30 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.01,2.03,9.01. |
| 2021-08-30 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,9.01. |
| 2021-08-18 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,5.03,5.07,9.01. |
| 2021-08-05 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-07-01 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.01,3.02,9.01. |
| 2021-05-06 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-03-11 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2021-02-05 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01,9.01. |
| 2021-01-19 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.01. |
| 2020-12-17 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,8.01,9.01. |
| 2020-12-03 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,8.01,9.01. |
| 2020-11-05 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2020-10-28 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.07. |
| 2020-09-16 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,9.01. |
| 2020-09-14 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.01,5.03,8.01,9.01. |
| 2020-09-09 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 8.01. |
| 2020-09-08 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,8.01,9.01. |
| 2020-08-06 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2020-06-04 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,8.01,9.01. |
| 2020-05-11 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K/A | Spero Therapeutics, Inc. filed Form 8-K/A covering items 5.02. |
| 2020-05-08 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2020-04-16 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,9.01. |
| 2020-03-16 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2020-02-28 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 3.03,5.03,8.01,9.01. |
| 2020-02-11 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,8.01,9.01. |
| 2020-01-30 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.01,3.02,8.01,9.01. |
| 2019-12-19 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.01,2.03,9.01. |
| 2019-12-05 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,9.01. |
| 2019-11-04 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2019-10-03 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 7.01,9.01. |
| 2019-09-06 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2019-08-08 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2019-06-13 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 1.01,9.01. |
| 2019-06-06 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.07. |
| 2019-05-09 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |
| 2019-04-18 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02. |
| 2019-03-29 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K/A | Spero Therapeutics, Inc. filed Form 8-K/A covering items 5.02. |
| 2019-03-19 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 5.02,9.01. |
| 2019-03-14 | Current report | SEC filing | Spero Therapeutics, Inc. filed Form 8-K | Spero Therapeutics, Inc. filed Form 8-K covering items 2.02,9.01. |