Browse the latest SEC filings and forms submitted by Spero Therapeutics, Inc. (SPRO). Access annual reports, quarterly statements, and other official disclosures.
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Search Company Filings →| Form | Filing Date | Description | Link |
|---|---|---|---|
| 8-K | March 26, 2026 | 8-K | View Document |
| 10-K | March 26, 2026 | 10-K | View Document |
| 4 | Feb. 9, 2026 | 4 | View Document |
| 4 | Feb. 9, 2026 | 4 | View Document |
| 4 | Feb. 5, 2026 | 4 | View Document |
| 4 | Feb. 4, 2026 | 4 | View Document |
| 8-K | Jan. 30, 2026 | 8-K | View Document |
| 8-K | Dec. 19, 2025 | 8-K | View Document |
| 8-K | Nov. 13, 2025 | 8-K | View Document |
| 10-Q | Nov. 13, 2025 | 10-Q | View Document |
| 4 | Nov. 12, 2025 | 4 | View Document |
| 4 | Sept. 3, 2025 | 4 | View Document |
| 4 | Sept. 3, 2025 | 4 | View Document |
| SCHEDULE 13G/A | Aug. 14, 2025 | - | View Document |
| 8-K | Aug. 12, 2025 | 8-K | View Document |
| S-8 | Aug. 12, 2025 | S-8 | View Document |
| 10-Q | Aug. 12, 2025 | 10-Q | View Document |
| 8-K | June 18, 2025 | 8-K | View Document |
| 4 | June 16, 2025 | 4 | View Document |
| 4 | June 16, 2025 | 4 | View Document |
| 4 | June 16, 2025 | 4 | View Document |
| 4 | June 16, 2025 | 4 | View Document |
| 4 | June 16, 2025 | 4 | View Document |
| 4 | June 16, 2025 | 4 | View Document |
| 4 | June 16, 2025 | 4 | View Document |
| 4 | June 16, 2025 | 4 | View Document |
| 8-K | May 28, 2025 | 8-K | View Document |
| 10-Q | May 13, 2025 | 10-Q | View Document |
| 8-K | May 13, 2025 | 8-K | View Document |
| 4 | May 6, 2025 | 4 | View Document |
| 8-K | April 28, 2025 | 8-K | View Document |
| DEF 14A | April 28, 2025 | DEF 14A | View Document |
| DEFA14A | April 28, 2025 | DEFA14A | View Document |
| ARS | April 28, 2025 | ARS | View Document |
| 10-K | March 27, 2025 | 10-K | View Document |
| 8-K | March 27, 2025 | 8-K | View Document |
| 8-K | Feb. 28, 2025 | 8-K | View Document |
| 4 | Feb. 5, 2025 | 4 | View Document |
| 4 | Feb. 5, 2025 | 4 | View Document |
| 4 | Feb. 5, 2025 | 4 | View Document |
| 4 | Feb. 5, 2025 | 4 | View Document |
| 8-K | Jan. 10, 2025 | 8-K | View Document |
| 10-Q | Nov. 14, 2024 | 10-Q | View Document |
| SC 13G/A | Nov. 14, 2024 | SC 13G/A | View Document |
| 8-K | Nov. 14, 2024 | 8-K | View Document |
| 4 | Nov. 12, 2024 | 4 | View Document |
| 8-K | Oct. 29, 2024 | 8-K | View Document |
| 8-K | Sept. 10, 2024 | 8-K | View Document |
| 4 | Aug. 29, 2024 | 4 | View Document |
| 4 | Aug. 29, 2024 | 4 | View Document |
| 4 | Aug. 29, 2024 | 4 | View Document |
| 4 | Aug. 6, 2024 | 4 | View Document |
| 8-K | Aug. 5, 2024 | 8-K | View Document |
| 10-Q | Aug. 5, 2024 | 10-Q | View Document |
| S-8 | Aug. 5, 2024 | S-8 | View Document |
| 8-K | June 3, 2024 | 8-K | View Document |
| 4 | May 30, 2024 | 4 | View Document |
| 4 | May 30, 2024 | 4 | View Document |
| 4 | May 30, 2024 | 4 | View Document |
| 4 | May 30, 2024 | 4 | View Document |
| 4 | May 30, 2024 | 4 | View Document |
| 4 | May 30, 2024 | 4 | View Document |
| 4 | May 30, 2024 | 4 | View Document |
| 4 | May 30, 2024 | 4 | View Document |
| 10-Q | May 15, 2024 | 10-Q | View Document |
| 8-K | May 15, 2024 | 8-K | View Document |
| ARS | April 16, 2024 | ARS | View Document |
| DEF 14A | April 16, 2024 | DEF 14A | View Document |
| DEFA14A | April 16, 2024 | DEFA14A | View Document |
| 8-K | March 29, 2024 | 8-K | View Document |
| EFFECT | March 22, 2024 | - | View Document |
| CORRESP | March 20, 2024 | - | View Document |
| UPLOAD | March 20, 2024 | - | View Document |
| S-3 | March 15, 2024 | S-3 | View Document |
| S-8 | March 15, 2024 | S-8 | View Document |
| 10-K | March 13, 2024 | 10-K | View Document |
| 8-K | March 13, 2024 | 8-K | View Document |
| SC 13G | Feb. 14, 2024 | SC 13G | View Document |
| 8-K | Feb. 9, 2024 | 8-K | View Document |
| 4 | Feb. 5, 2024 | 4 | View Document |
| 4 | Feb. 5, 2024 | 4 | View Document |
| 4 | Feb. 5, 2024 | 4 | View Document |
| 144 | Feb. 5, 2024 | - | View Document |
| 4 | Feb. 5, 2024 | 4 | View Document |
| 4 | Feb. 5, 2024 | 4 | View Document |
| 4 | Feb. 5, 2024 | 4 | View Document |
| 8-K | Jan. 8, 2024 | 8-K | View Document |
| 8-K | Jan. 5, 2024 | 8-K | View Document |
| 4 | Jan. 4, 2024 | 4 | View Document |
| 8-K | Jan. 2, 2024 | 8-K | View Document |
| 3 | Nov. 15, 2023 | 3 | View Document |
| 4 | Nov. 15, 2023 | 4 | View Document |
| 10-Q | Nov. 13, 2023 | 10-Q | View Document |
| S-8 | Nov. 13, 2023 | S-8 | View Document |
| S-8 | Nov. 13, 2023 | S-8 | View Document |
| 8-K | Nov. 13, 2023 | 8-K | View Document |
| 8-K | Nov. 1, 2023 | 8-K | View Document |
| 8-K/A | Oct. 16, 2023 | 8-K/A | View Document |
| 4 | Oct. 10, 2023 | 4 | View Document |
| 4 | Oct. 10, 2023 | 4 | View Document |
| 4 | Oct. 10, 2023 | 4 | View Document |
| 4 | Oct. 10, 2023 | 4 | View Document |
| 4 | Oct. 10, 2023 | 4 | View Document |
| 4 | Oct. 10, 2023 | 4 | View Document |
| 4 | Oct. 10, 2023 | 4 | View Document |
| 4 | Oct. 10, 2023 | 4 | View Document |
| 8-K | Oct. 10, 2023 | 8-K | View Document |
| 4 | Sept. 15, 2023 | 4 | View Document |
| DEF 14A | Sept. 1, 2023 | DEF 14A | View Document |
| ARS | Sept. 1, 2023 | ARS | View Document |
| 4 | Aug. 30, 2023 | 4 | View Document |
| 4 | Aug. 30, 2023 | 4 | View Document |
| 4 | Aug. 30, 2023 | 4 | View Document |
| 4 | Aug. 30, 2023 | 4 | View Document |
| 144 | Aug. 29, 2023 | - | View Document |
| PRE 14A | Aug. 22, 2023 | PRE 14A | View Document |
| 10-Q | Aug. 10, 2023 | 10-Q | View Document |
| S-8 | Aug. 10, 2023 | S-8 | View Document |
| 8-K | Aug. 10, 2023 | 8-K | View Document |
| 4 | Aug. 3, 2023 | 4 | View Document |
| 8-K | July 31, 2023 | 8-K | View Document |
| 3 | July 24, 2023 | 3 | View Document |
| 4 | June 14, 2023 | 4 | View Document |
| 8-K | June 14, 2023 | 8-K | View Document |
| 10-Q | May 11, 2023 | 10-Q | View Document |
| 8-K | May 11, 2023 | 8-K | View Document |
| 10-K | March 30, 2023 | 10-K | View Document |
| S-8 | March 30, 2023 | S-8 | View Document |
| 8-K | March 30, 2023 | 8-K | View Document |
| SC 13G/A | Feb. 14, 2023 | - | View Document |
| SC 13G/A | Feb. 14, 2023 | AMENDMENT NO. 5 TO THE SCHEDULE 13G | View Document |
| 4 | Feb. 6, 2023 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2023 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2023 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2023 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2023 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2023 | FORM 4 SUBMISSION | View Document |
| 8-K | Feb. 1, 2023 | 8-K | View Document |
| CT ORDER | Jan. 19, 2023 | - | View Document |
| 8-K | Jan. 9, 2023 | 8-K | View Document |
| 4 | Jan. 5, 2023 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 5, 2023 | FORM 4 SUBMISSION | View Document |
| D | Nov. 15, 2022 | - | View Document |
| 10-Q | Nov. 14, 2022 | 10-Q | View Document |
| 8-K | Nov. 14, 2022 | 8-K | View Document |
| S-8 | Nov. 14, 2022 | S-8 | View Document |
| 8-K | Nov. 8, 2022 | 8-K | View Document |
| SC 13G/A | Oct. 3, 2022 | - | View Document |
| 4 | Sept. 26, 2022 | PRIMARY DOCUMENT | View Document |
| 8-K | Sept. 22, 2022 | 8-K | View Document |
| 4 | Sept. 19, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Sept. 19, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Sept. 19, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Sept. 19, 2022 | FORM 4 SUBMISSION | View Document |
| 8-K | Sept. 19, 2022 | 8-K | View Document |
| 4 | Sept. 19, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Sept. 19, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Sept. 19, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Sept. 14, 2022 | FORM 4 SUBMISSION | View Document |
| 3 | Sept. 14, 2022 | FORM 3 SUBMISSION | View Document |
| 8-K | Sept. 6, 2022 | 8-K | View Document |
| 4 | Aug. 30, 2022 | FORM 4 SUBMISSION | View Document |
| 10-Q | Aug. 10, 2022 | 10-Q | View Document |
| 8-K | Aug. 10, 2022 | 8-K | View Document |
| DEFA14A | Aug. 5, 2022 | DEFA14A | View Document |
| DEF 14A | Aug. 5, 2022 | DEF 14A | View Document |
| SC 13G | July 8, 2022 | - | View Document |
| 8-K | July 1, 2022 | 8-K | View Document |
| 8-K | June 27, 2022 | 8-K | View Document |
| 8-K | June 7, 2022 | 8-K | View Document |
| 10-Q | May 16, 2022 | 10-Q | View Document |
| 8-K | May 16, 2022 | 8-K | View Document |
| 8-K | May 3, 2022 | 8-K | View Document |
| 4 | April 28, 2022 | PRIMARY DOCUMENT | View Document |
| 8-K | April 7, 2022 | 8-K | View Document |
| 8-K | March 31, 2022 | 8-K | View Document |
| 10-K | March 31, 2022 | 10-K | View Document |
| 4 | March 31, 2022 | PRIMARY DOCUMENT | View Document |
| 4 | March 16, 2022 | PRIMARY DOCUMENT | View Document |
| SC 13G/A | March 9, 2022 | - | View Document |
| 4 | March 2, 2022 | PRIMARY DOCUMENT | View Document |
| 4 | Feb. 23, 2022 | PRIMARY DOCUMENT | View Document |
| 8-K | Feb. 16, 2022 | 8-K | View Document |
| SC 13G/A | Feb. 14, 2022 | AMENDMENT NO. 4 TO THE SCHEDULE 13G | View Document |
| SC 13G/A | Feb. 14, 2022 | - | View Document |
| 4 | Feb. 3, 2022 | FORM 4 SUBMISSION | View Document |
| SC 13G/A | Feb. 3, 2022 | - | View Document |
| 4 | Feb. 3, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 1, 2022 | PRIMARY DOCUMENT | View Document |
| 4 | Jan. 26, 2022 | PRIMARY DOCUMENT | View Document |
| SC 13G/A | Jan. 25, 2022 | SCHEDULE 13G/A | View Document |
| 8-K | Jan. 25, 2022 | 8-K | View Document |
| 4 | Jan. 20, 2022 | PRIMARY DOCUMENT | View Document |
| 8-K | Jan. 19, 2022 | 8-K | View Document |
| 4 | Jan. 12, 2022 | PRIMARY DOCUMENT | View Document |
| 4 | Jan. 7, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 7, 2022 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 7, 2022 | FORM 4 SUBMISSION | View Document |
| 8-K | Jan. 4, 2022 | 8-K | View Document |
| 4 | Jan. 3, 2022 | PRIMARY DOCUMENT | View Document |
| 4 | Dec. 29, 2021 | FORM 4 SUBMISSION | View Document |
| CT ORDER | Dec. 16, 2021 | - | View Document |
| 4 | Nov. 12, 2021 | FORM 4 SUBMISSION | View Document |
| 8-K | Nov. 10, 2021 | 8-K | View Document |
| 10-Q | Nov. 10, 2021 | 10-Q | View Document |
| 4 | Nov. 2, 2021 | PRIMARY DOCUMENT | View Document |
| 8-K | Oct. 28, 2021 | 8-K | View Document |
| 3 | Oct. 14, 2021 | FORM 3 SUBMISSION | View Document |
| 8-K | Oct. 12, 2021 | 8-K | View Document |
| 4 | Oct. 4, 2021 | PRIMARY DOCUMENT | View Document |
| 8-K | Sept. 30, 2021 | 8-K | View Document |
| S-8 | Sept. 20, 2021 | S-8 | View Document |
| 4 | Sept. 15, 2021 | PRIMARY DOCUMENT | View Document |
| 4 | Sept. 10, 2021 | PRIMARY DOCUMENT | View Document |
| 4 | Sept. 1, 2021 | PRIMARY DOCUMENT | View Document |
| 4 | Aug. 30, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Aug. 30, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Aug. 30, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Aug. 30, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Aug. 30, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Aug. 30, 2021 | FORM 4 SUBMISSION | View Document |
| 8-K | Aug. 30, 2021 | 8-K | View Document |
| 4 | Aug. 27, 2021 | PRIMARY DOCUMENT | View Document |
| 4 | Aug. 24, 2021 | PRIMARY DOCUMENT | View Document |
| 4 | Aug. 18, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Aug. 18, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Aug. 18, 2021 | FORM 4 SUBMISSION | View Document |
| 8-K | Aug. 18, 2021 | 8-K | View Document |
| 4 | Aug. 18, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Aug. 18, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Aug. 18, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Aug. 18, 2021 | FORM 4 SUBMISSION | View Document |
| 8-K | Aug. 5, 2021 | 8-K | View Document |
| 10-Q | Aug. 5, 2021 | 10-Q | View Document |
| D | July 14, 2021 | - | View Document |
| DEF 14A | July 6, 2021 | DEF 14A | View Document |
| 8-K | July 1, 2021 | 8-K | View Document |
| PRE 14A | June 25, 2021 | PRE 14A | View Document |
| 10-Q | May 6, 2021 | 10-Q Q1 2021 | View Document |
| 8-K | May 6, 2021 | 8-K | View Document |
| EFFECT | March 29, 2021 | - | View Document |
| CORRESP | March 24, 2021 | - | View Document |
| 10-K/A | March 23, 2021 | 10-K/A | View Document |
| UPLOAD | March 17, 2021 | - | View Document |
| 10-K | March 11, 2021 | 10-K | View Document |
| S-8 | March 11, 2021 | S-8 | View Document |
| S-3 | March 11, 2021 | S-3 | View Document |
| 8-K | March 11, 2021 | 8-K | View Document |
| SC 13G/A | Feb. 16, 2021 | - | View Document |
| SC 13D/A | Feb. 16, 2021 | AMENDED ACQUISITION OF BENEFICIAL OWNERSHIP | View Document |
| SC 13G/A | Feb. 16, 2021 | AMENDMENT NO. 3 TO THE SCHEDULE 13G | View Document |
| SC 13G/A | Feb. 10, 2021 | SC 13G/A | View Document |
| 4 | Feb. 10, 2021 | PRIMARY DOCUMENT | View Document |
| 8-K | Feb. 5, 2021 | 8-K | View Document |
| 4 | Feb. 4, 2021 | PRIMARY DOCUMENT | View Document |
| 4 | Feb. 3, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2021 | FORM 4 SUBMISSION | View Document |
| SC 13G/A | Feb. 2, 2021 | SC 13G/A | View Document |
| SC 13G | Feb. 2, 2021 | - | View Document |
| 8-K | Jan. 19, 2021 | 8-K | View Document |
| 4 | Jan. 6, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 6, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 6, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 6, 2021 | FORM 4 SUBMISSION | View Document |
| 3 | Jan. 5, 2021 | FORM 3 SUBMISSION | View Document |
| 4 | Jan. 5, 2021 | FORM 4 SUBMISSION | View Document |
| 4 | Dec. 18, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Dec. 18, 2020 | PRIMARY DOCUMENT | View Document |
| 8-K | Dec. 17, 2020 | 8-K | View Document |
| SC 13D/A | Dec. 7, 2020 | AMENDMENT NO. 5 TO SC 13D | View Document |
| 8-K | Dec. 3, 2020 | 8-K | View Document |
| 4 | Dec. 2, 2020 | FORM 4 SUBMISSION | View Document |
| 3 | Dec. 2, 2020 | FORM 3 SUBMISSION | View Document |
| 424B5 | Nov. 13, 2020 | 424B5 | View Document |
| 4 | Nov. 10, 2020 | PRIMARY DOCUMENT | View Document |
| 4 | Nov. 6, 2020 | PRIMARY DOCUMENT | View Document |
| 8-K | Nov. 5, 2020 | 8-K | View Document |
| 10-Q | Nov. 5, 2020 | 10-Q | View Document |
| 4 | Nov. 5, 2020 | FORM 4 SUBMISSION | View Document |
| 8-K | Oct. 28, 2020 | 8-K | View Document |
| 4 | Oct. 27, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Oct. 27, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Oct. 27, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Oct. 27, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Oct. 27, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Oct. 27, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Oct. 27, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Oct. 27, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Oct. 15, 2020 | FORM 4 SUBMISSION | View Document |
| DEF 14A | Sept. 30, 2020 | DEF 14A | View Document |
| SC 13G/A | Sept. 23, 2020 | - | View Document |
| 3 | Sept. 22, 2020 | PRIMARY DOCUMENT | View Document |
| 8-K | Sept. 16, 2020 | 8-K | View Document |
| 424B5 | Sept. 14, 2020 | 424B5 | View Document |
| 8-K | Sept. 14, 2020 | 8-K | View Document |
| 4 | Sept. 10, 2020 | FORM 4 SUBMISSION | View Document |
| 8-K | Sept. 9, 2020 | 8-K | View Document |
| 424B5 | Sept. 9, 2020 | 424B5 | View Document |
| 8-K | Sept. 8, 2020 | 8-K | View Document |
| S-8 | Aug. 6, 2020 | S-8 | View Document |
| 8-K | Aug. 6, 2020 | 8-K | View Document |
| 10-Q | Aug. 6, 2020 | 10-Q | View Document |
| 4 | July 9, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | June 29, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | June 23, 2020 | FORM 4 SUBMISSION | View Document |
| SC 13D/A | June 4, 2020 | AMENDMENT TO FORM SC 13D | View Document |
| 8-K | June 4, 2020 | 8-K | View Document |
| 8-K/A | May 11, 2020 | 8-K/A | View Document |
| 10-Q | May 8, 2020 | 10-Q | View Document |
| 8-K | May 8, 2020 | 8-K | View Document |
| 3 | April 23, 2020 | FORM 3 SUBMISSION | View Document |
| 8-K | April 16, 2020 | 8-K | View Document |
| S-8 | March 19, 2020 | S-8 | View Document |
| 10-K | March 16, 2020 | 10-K | View Document |
| 8-K | March 16, 2020 | 8-K | View Document |
| 8-K | Feb. 28, 2020 | 8-K | View Document |
| SC 13G/A | Feb. 18, 2020 | AMENDMENT NO. 2 TO THE SCHEDULE 13G | View Document |
| SC 13G/A | Feb. 14, 2020 | - | View Document |
| SC 13D/A | Feb. 14, 2020 | AMENDMENT TO FORM SC 13D | View Document |
| 8-K | Feb. 11, 2020 | 8-K | View Document |
| 424B5 | Feb. 11, 2020 | 424B5 | View Document |
| SC 13G/A | Feb. 4, 2020 | SCHEDULE 13G/A | View Document |
| 4 | Feb. 3, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Feb. 3, 2020 | FORM 4 SUBMISSION | View Document |
| SC 13G/A | Jan. 31, 2020 | SC 13G/A | View Document |
| 8-K | Jan. 30, 2020 | 8-K | View Document |
| 3 | Jan. 13, 2020 | FORM 3 SUBMISSION | View Document |
| 4 | Jan. 6, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 6, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 6, 2020 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 6, 2020 | FORM 4 SUBMISSION | View Document |
| 8-K | Dec. 19, 2019 | 8-K | View Document |
| 8-K | Dec. 5, 2019 | 8-K | View Document |
| 3 | Nov. 8, 2019 | FORM 3 SUBMISSION | View Document |
| 10-Q | Nov. 4, 2019 | 10-Q | View Document |
| 8-K | Nov. 4, 2019 | 8-K | View Document |
| 8-K | Oct. 3, 2019 | 8-K | View Document |
| 8-K | Sept. 6, 2019 | 8-K | View Document |
| 10-Q | Aug. 8, 2019 | 10-Q | View Document |
| 8-K | Aug. 8, 2019 | 8-K | View Document |
| 424B5 | June 14, 2019 | 424B5 | View Document |
| 8-K | June 13, 2019 | 8-K | View Document |
| 8-K | June 6, 2019 | 8-K | View Document |
| 4 | June 5, 2019 | FORM 4 SUBMISSION | View Document |
| 4 | June 5, 2019 | FORM 4 SUBMISSION | View Document |
| 4 | June 5, 2019 | FORM 4 SUBMISSION | View Document |
| 4 | June 5, 2019 | FORM 4 SUBMISSION | View Document |
| 4 | June 5, 2019 | FORM 4 SUBMISSION | View Document |
| 4 | June 5, 2019 | FORM 4 SUBMISSION | View Document |
| 8-K | May 9, 2019 | 8-K | View Document |
| 10-Q | May 9, 2019 | 10-Q | View Document |
| DEF 14A | April 26, 2019 | DEF 14A | View Document |
| 8-K | April 18, 2019 | 8-K | View Document |
| CT ORDER | April 1, 2019 | - | View Document |
| 8-K/A | March 29, 2019 | FORM 8-K/A | View Document |
| 4 | March 29, 2019 | FORM 4 SUBMISSION | View Document |
| 3 | March 19, 2019 | FORM 3 SUBMISSION | View Document |
| 8-K | March 19, 2019 | 8-K | View Document |
| S-8 | March 14, 2019 | S-8 | View Document |
| S-8 | March 14, 2019 | S-8 | View Document |
| 8-K | March 14, 2019 | 8-K | View Document |
| 10-K | March 14, 2019 | 10-K | View Document |
| SC 13G/A | Feb. 14, 2019 | SC 13G/A | View Document |
| SC 13G/A | Feb. 14, 2019 | SC 13G/A | View Document |
| SC 13G/A | Feb. 14, 2019 | AMENDMENT NO. 1 TO THE SCHEDULE 13G | View Document |
| SC 13G/A | Feb. 13, 2019 | - | View Document |
| SC 13G/A | Feb. 8, 2019 | SC 13G/A | View Document |
| 8-K | Jan. 7, 2019 | FORM 8-K | View Document |
| 4 | Jan. 2, 2019 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 2, 2019 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 2, 2019 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 2, 2019 | FORM 4 SUBMISSION | View Document |
| 4 | Jan. 2, 2019 | FORM 4 SUBMISSION | View Document |
| EFFECT | Dec. 11, 2018 | - | View Document |
| CT ORDER | Dec. 11, 2018 | - | View Document |
| CORRESP | Dec. 7, 2018 | - | View Document |
| S-3 | Dec. 3, 2018 | S-3 | View Document |
| 8-K | Nov. 16, 2018 | 8-K | View Document |
| 8-K | Nov. 13, 2018 | 8-K | View Document |
| 10-Q | Nov. 8, 2018 | 10-Q | View Document |
| 8-K | Nov. 8, 2018 | 8-K | View Document |
| 8-K | Sept. 27, 2018 | 8-K | View Document |
| 3 | Sept. 21, 2018 | FORM 3 SUBMISSION | View Document |
| 4 | Sept. 21, 2018 | FORM 4 SUBMISSION | View Document |
| SC 13D/A | Sept. 19, 2018 | - | View Document |
| 8-K | Aug. 14, 2018 | FORM 8-K | View Document |
| 8-K | Aug. 9, 2018 | 8-K | View Document |
| 10-Q | Aug. 9, 2018 | 10-Q | View Document |
| 4 | July 17, 2018 | OWNERSHIP DOCUMENT | View Document |
| SC 13D/A | July 17, 2018 | - | View Document |
| 8-K | July 17, 2018 | 8-K | View Document |
| 8-K | July 16, 2018 | 8-K | View Document |
| 424B4 | July 13, 2018 | 424B4 | View Document |
| EFFECT | July 12, 2018 | - | View Document |
| S-1/A | July 11, 2018 | S-1/A | View Document |
| 8-K | July 9, 2018 | 8-K | View Document |
| S-1 | July 9, 2018 | S-1 | View Document |
| 8-K | July 9, 2018 | 8-K | View Document |
| 4 | July 6, 2018 | FORM 4 SUBMISSION | View Document |
| 4 | July 6, 2018 | FORM 4 SUBMISSION | View Document |
| 4 | July 6, 2018 | FORM 4 SUBMISSION | View Document |
| 8-K | June 8, 2018 | FORM 8-K | View Document |
| 4 | June 6, 2018 | FORM 4 SUBMISSION | View Document |
| 4 | June 6, 2018 | FORM 4 SUBMISSION | View Document |
| 4 | June 6, 2018 | FORM 4 SUBMISSION | View Document |
| 4 | June 6, 2018 | FORM 4 SUBMISSION | View Document |
| 4 | June 6, 2018 | FORM 4 SUBMISSION | View Document |
| 4 | June 6, 2018 | FORM 4 SUBMISSION | View Document |
| DRS | May 25, 2018 | - | View Document |
| 10-Q | May 10, 2018 | SPERO THERAPEUTICS, INC. Q1 2018 10-Q | View Document |
| 8-K | May 10, 2018 | 8-K | View Document |
| DEF 14A | April 27, 2018 | DEF14A | View Document |
| 8-K | April 2, 2018 | 8-K | View Document |
| 10-K | April 2, 2018 | 10-K | View Document |
| 4 | March 30, 2018 | FORM 4 SUBMISSION | View Document |
| SC 13D | March 14, 2018 | SC 13D | View Document |
| SC 13G | Feb. 14, 2018 | SC 13G | View Document |
| SC 13G | Feb. 14, 2018 | SC 13G | View Document |
| SC 13G | Feb. 14, 2018 | SC 13G | View Document |
| SC 13G | Feb. 13, 2018 | SC 13G | View Document |
| SC 13G | Feb. 13, 2018 | - | View Document |
| 3 | Feb. 6, 2018 | FORM 3 SUBMISSION | View Document |
| 8-K | Feb. 1, 2018 | 8-K | View Document |
| 8-K | Jan. 23, 2018 | 8-K | View Document |
| 3 | Jan. 5, 2018 | FORM 3 SUBMISSION | View Document |
| 4 | Jan. 5, 2018 | FORM 4 SUBMISSION | View Document |
| 4 | Dec. 15, 2017 | FORM 4 SUBMISSION | View Document |
| 4 | Dec. 15, 2017 | FORM 4 SUBMISSION | View Document |
| 4 | Dec. 15, 2017 | FORM 4 SUBMISSION | View Document |
| 4 | Dec. 15, 2017 | FORM 4 SUBMISSION | View Document |
| S-8 | Dec. 14, 2017 | FORM S-8 | View Document |
| 8-K | Dec. 14, 2017 | 8-K | View Document |
| 10-Q | Dec. 14, 2017 | FORM 10-Q | View Document |
| SC 13D | Nov. 16, 2017 | - | View Document |
| SC 13G | Nov. 15, 2017 | - | View Document |
| SC 13G | Nov. 9, 2017 | THE SCHEDULE 13G | View Document |
| 4 | Nov. 7, 2017 | FORM 4 SUBMISSION | View Document |
| 4 | Nov. 7, 2017 | FORM 4 SUBMISSION | View Document |
| 4 | Nov. 7, 2017 | FORM 4 SUBMISSION | View Document |
| 4 | Nov. 7, 2017 | FORM 4 SUBMISSION | View Document |
| 4 | Nov. 7, 2017 | FORM 4 SUBMISSION | View Document |
| 4 | Nov. 7, 2017 | OWNERSHIP DOCUMENT | View Document |
| UPLOAD | Nov. 6, 2017 | - | View Document |
| 8-K | Nov. 6, 2017 | FORM 8-K | View Document |
| 424B4 | Nov. 2, 2017 | 424B4 | View Document |
| 3 | Nov. 2, 2017 | OWNERSHIP DOCUMENT | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| EFFECT | Nov. 1, 2017 | - | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| 3 | Nov. 1, 2017 | FORM 3 SUBMISSION | View Document |
| CERTNAS | Nov. 1, 2017 | AUTO-GENERATED PAPER DOCUMENT | View Document |
| CT ORDER | Nov. 1, 2017 | - | View Document |
| CORRESP | Oct. 30, 2017 | - | View Document |
| CORRESP | Oct. 30, 2017 | - | View Document |
| 8-A12B | Oct. 30, 2017 | 8-A12B | View Document |
| S-1/A | Oct. 23, 2017 | S-1/A | View Document |
| CORRESP | Oct. 12, 2017 | - | View Document |
| S-1 | Oct. 6, 2017 | S-1 | View Document |
| DRS/A | Sept. 29, 2017 | - | View Document |
| DRSLTR | Sept. 29, 2017 | - | View Document |
| DRS/A | Sept. 22, 2017 | - | View Document |
| DRS | Aug. 25, 2017 | - | View Document |
| D | March 21, 2017 | - | View Document |