{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-24-003807","form_type":"8-K","ticker":"SPRO","cik":"0001701108","company_name":"Spero Therapeutics, Inc.","filed_at":"2024-01-08T23:59:59+00:00","discovered_at":"2026-05-14T18:03:25.163750+00:00","generated_at":"2026-06-07T02:23:17.025429+00:00","sec_items":["7.01","9.01"],"event_type":"other","sentiment":"neutral","materiality_score":0.05,"calibrated_materiality_score":0.05,"confidence":"low","headline":"Spero Therapeutics files updated investor presentation; no specific new material details provided","bullets":["Company updated its corporate investor presentation on January 8, 2024.","Presentation made available on company's website; content not summarized in the 8-K.","No financial or operational updates disclosed in the filing body.","Company disclaims obligation to update the presentation after this date."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-24-003807","json":"https://secwatch.observer/filing/0001193125-24-003807.json","markdown":"https://secwatch.observer/filing/0001193125-24-003807.md","text":"https://secwatch.observer/filing/0001193125-24-003807.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1701108/000119312524003807/0001193125-24-003807-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1701108/000119312524003807/d12871d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T02:23:17.025429+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}