Spero Therapeutics, Inc. — All Filings
488 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 8-K | 8-K | 0001193125-26-126244 | Mar 26, 2026 | — |
| 10-K | 10-K | 0001193125-26-126192 | Mar 26, 2026 | Dec 31, 2025 |
| 4 | 4 | 0001193125-26-043336 | Feb 9, 2026 | Feb 6, 2026 |
| 4 | 4 | 0001193125-26-043315 | Feb 9, 2026 | Feb 6, 2026 |
| 4 | 4 | 0001193125-26-038441 | Feb 5, 2026 | Feb 2, 2026 |
| 4 | 4 | 0001193125-26-038184 | Feb 4, 2026 | Feb 2, 2026 |
| 8-K | 8-K | 0001193125-26-032004 | Jan 30, 2026 | — |
| 8-K | 8-K | 0001193125-25-325821 | Dec 19, 2025 | — |
| 8-K | 8-K | 0001193125-25-280518 | Nov 13, 2025 | — |
| 10-Q | 10-Q | 0001193125-25-280174 | Nov 13, 2025 | Sep 30, 2025 |
| 4 | 4 | 0001193125-25-278370 | Nov 12, 2025 | Nov 7, 2025 |
| 4 | 4 | 0000950170-25-112661 | Sep 3, 2025 | Aug 28, 2025 |
| 4 | 4 | 0000950170-25-112659 | Sep 3, 2025 | Aug 28, 2025 |
| SCHEDULE 13G/A | — | 0000950170-25-109211 | Aug 14, 2025 | — |
| S-8 | S-8 | 0001193125-25-179082 | Aug 12, 2025 | — |
| 10-Q | 10-Q | 0000950170-25-107388 | Aug 12, 2025 | Jun 30, 2025 |
| 8-K | 8-K | 0001193125-25-178970 | Aug 12, 2025 | — |
| 8-K | 8-K | 0001193125-25-142807 | Jun 18, 2025 | Jun 12, 2025 |
| 4 | 4 | 0000950170-25-087021 | Jun 16, 2025 | Jun 12, 2025 |
| 4 | 4 | 0000950170-25-087020 | Jun 16, 2025 | Jun 12, 2025 |
| 4 | 4 | 0000950170-25-087017 | Jun 16, 2025 | Jun 12, 2025 |
| 4 | 4 | 0000950170-25-087015 | Jun 16, 2025 | Jun 12, 2025 |
| 4 | 4 | 0000950170-25-087013 | Jun 16, 2025 | Jun 12, 2025 |
| 4 | 4 | 0000950170-25-087010 | Jun 16, 2025 | Jun 12, 2025 |
| 4 | 4 | 0000950170-25-087009 | Jun 16, 2025 | Jun 12, 2025 |
| 4 | 4 | 0000950170-25-087008 | Jun 16, 2025 | Jun 12, 2025 |
| 8-K | 8-K | 0001193125-25-128680 | May 28, 2025 | — |
| 8-K | 8-K | 0001193125-25-118882 | May 13, 2025 | — |
| 10-Q | 10-Q | 0000950170-25-070380 | May 13, 2025 | Mar 31, 2025 |
| 4 | 4 | 0000950170-25-064821 | May 6, 2025 | May 2, 2025 |
| ARS | ARS | 0001193125-25-100819 | Apr 28, 2025 | Dec 31, 2024 |
| DEFA14A | DEFA14A | 0001193125-25-100624 | Apr 28, 2025 | — |
| DEF 14A | DEF 14A | 0001193125-25-100544 | Apr 28, 2025 | Jun 12, 2025 |
| 8-K | 8-K | 0001193125-25-100433 | Apr 28, 2025 | Apr 22, 2025 |
| 8-K | 8-K | 0001193125-25-065633 | Mar 27, 2025 | — |
| 10-K | 10-K | 0000950170-25-046125 | Mar 27, 2025 | Dec 31, 2024 |
| 8-K | 8-K | 0001193125-25-042785 | Feb 28, 2025 | Feb 25, 2025 |
| 4 | 4 | 0000950170-25-014866 | Feb 5, 2025 | Feb 3, 2025 |
| 4 | 4 | 0000950170-25-014859 | Feb 5, 2025 | Feb 3, 2025 |
| 4 | 4 | 0000950170-25-014850 | Feb 5, 2025 | Feb 3, 2025 |
| 4 | 4 | 0000950170-25-014849 | Feb 5, 2025 | — |
| 8-K | 8-K | 0001193125-25-004063 | Jan 10, 2025 | Jan 7, 2025 |
| SC 13G/A | SC 13G/A | 0001193125-24-258822 | Nov 14, 2024 | — |
| 8-K | 8-K | 0001193125-24-258540 | Nov 14, 2024 | — |
| 10-Q | 10-Q | 0000950170-24-127016 | Nov 14, 2024 | Sep 30, 2024 |
| 4 | 4 | 0000950170-24-125339 | Nov 12, 2024 | Nov 7, 2024 |
| 8-K | 8-K | 0001193125-24-246627 | Oct 29, 2024 | — |
| 8-K | 8-K | 0001193125-24-216310 | Sep 10, 2024 | Sep 9, 2024 |
| 4 | 4 | 0000950170-24-102000 | Aug 29, 2024 | Aug 27, 2024 |
| 4 | 4 | 0000950170-24-101998 | Aug 29, 2024 | Aug 27, 2024 |