Spero Therapeutics, Inc.
SPRONasdaqCIK 1701108HealthcareFiscal year ends Dec 31
Reports and events: 171 filings
Newest first, by EDGAR acceptance time (Eastern). Each filing’s page lists its documents on sec.gov and, for 10-K and 10-Q reports, the extracted sections.
What the forms are: 10-K, 10-Q, 8-K, Form 4, DEF 14A, Schedule 13D, Schedule 13G, amendments, accession numbers.
| Filed | Form | What it is | Accession number |
|---|---|---|---|
| 2026-10-2717:16 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0001193125-26-434452 |
| 2026-08-2817:25 ET | 8-K | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-374788 |
| 2026-08-1216:09 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-26-346855 |
| 2026-08-1216:03 ET | 10-Q | Quarterly reportPeriod 2026-06-30 | 0001193125-26-346795 |
| 2026-07-1406:30 ET | 8-K | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-302473 |
| 2026-06-2517:08 ET | 8-K | 5.02 Departure or appointment of officers or directors; 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001193125-26-283033 |
| 2026-06-2216:05 ET | 8-K | 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-277506 |
| 2026-05-1316:05 ET | 10-Q | Quarterly reportPeriod 2026-03-31 | 0001193125-26-221591 |
| 2026-05-1316:02 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-26-221567 |
| 2026-04-2716:30 ET | DEF 14A | Proxy statementPeriod 2026-06-23 | 0001193125-26-182201 |
| 2026-03-2616:10 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-26-126244 |
| 2026-03-2616:05 ET | 10-K | Annual reportPeriod 2025-12-31 | 0001193125-26-126192 |
| 2026-01-3017:01 ET | 8-K | 5.02 Departure or appointment of officers or directors; 8.01 Other events | 0001193125-26-032004 |
| 2025-12-1908:25 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-325821 |
| 2025-11-1317:18 ET | 8-K | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-25-280518 |
| 2025-11-1316:10 ET | 10-Q | Quarterly reportPeriod 2025-09-30 | 0001193125-25-280174 |
| 2025-08-1216:31 ET | 10-Q | Quarterly reportPeriod 2025-06-30 | 0000950170-25-107388 |
| 2025-08-1216:17 ET | 8-K | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-25-178970 |
| 2025-06-1817:12 ET | 8-K | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results | 0001193125-25-142807 |
| 2025-05-2807:12 ET | 8-K | 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-128680 |
| 2025-05-1316:49 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-25-118882 |
| 2025-05-1316:15 ET | 10-Q | Quarterly reportPeriod 2025-03-31 | 0000950170-25-070380 |
| 2025-04-2816:15 ET | DEF 14A | Proxy statementPeriod 2025-06-12 | 0001193125-25-100544 |
| 2025-04-2816:02 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001193125-25-100433 |
| 2025-03-2717:19 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-25-065633 |
| 2025-03-2716:30 ET | 10-K | Annual reportPeriod 2024-12-31 | 0000950170-25-046125 |
| 2025-02-2817:11 ET | 8-K | 3.01 Delisting notice | 0001193125-25-042785 |
| 2025-01-1007:00 ET | 8-K | 2.02 Results of operations; 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-004063 |
| 2024-11-1416:05 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-24-258540 |
| 2024-11-1416:02 ET | 10-Q | Quarterly reportPeriod 2024-09-30 | 0000950170-24-127016 |
| 2024-10-2917:01 ET | 8-K | 2.02 Results of operations; 2.05 Exit or disposal costs; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-24-246627 |
| 2024-09-1006:56 ET | 8-K | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-24-216310 |
| 2024-08-0516:18 ET | 10-Q | Quarterly reportPeriod 2024-06-30 | 0000950170-24-090782 |
| 2024-08-0516:13 ET | 8-K | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-24-193913 |
| 2024-06-0316:15 ET | 8-K | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001193125-24-153034 |
| 2024-05-1516:06 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-24-139364 |
| 2024-05-1516:02 ET | 10-Q | Quarterly reportPeriod 2024-03-31 | 0000950170-24-060400 |
| 2024-04-1616:11 ET | DEF 14A | Proxy statementPeriod 2024-05-29 | 0001193125-24-097749 |
| 2024-03-2916:06 ET | 8-K | 8.01 Other events | 0001193125-24-082060 |
| 2024-03-1316:10 ET | 10-K | Annual reportPeriod 2023-12-31 | 0000950170-24-030767 |
| 2024-03-1316:07 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-24-066825 |
| 2024-02-0916:05 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0001193125-24-029913 |
| 2024-01-0806:07 ET | 8-K | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-24-003807 |
| 2024-01-0508:11 ET | 8-K | 2.02 Results of operations; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-24-002894 |
| 2024-01-0208:13 ET | 8-K | 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-24-000249 |
| 2023-11-1316:13 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001193125-23-276030 |
| 2023-11-1316:02 ET | 10-Q | Quarterly reportPeriod 2023-09-30 | 0000950170-23-062897 |
| 2023-11-0108:10 ET | 8-K | 5.02 Departure or appointment of officers or directors; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-23-267758 |
| 2023-10-1616:01 ET | 8-K/A | 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001193125-23-256865 |
| 2023-10-1008:28 ET | 8-K | 5.02 Departure or appointment of officers or directors; 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001193125-23-253136 |
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 29, 2026, 04:34 ET. Listed shows no prices and gives no investment advice.