{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-407555","form_type":"8-K","ticker":"LXEO","cik":"0001907108","company_name":"Lexeo Therapeutics, Inc.","filed_at":"2026-09-29T20:20:33+00:00","discovered_at":"2026-09-29T20:22:00.371042+00:00","generated_at":"2026-10-12T13:50:24.420756+00:00","sec_items":["2.01","3.02","9.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Lexeo completes acquisition of Mantle Therapeutics for $5.3M cash and $3M stock plus contingent payments","bullets":["Lexeo completed the Mantle Therapeutics acquisition on September 29, 2026, through the merger of Magma Merger Sub Inc. into Mantle.","Upfront consideration was $5.3 million in cash and $3.0 million in Lexeo common stock, issued under Section 4(a)(2)/Regulation D exemption.","Contingent payments include a $1.0 million additional cash payment and up to $12.0 million in milestone payments over 12 years tied to development and regulatory milestones.","Mantle restricted stock vested and was cancelled, and Mantle SAFEs and convertible promissory notes were cancelled for applicable consideration or payoff."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-407555","json":"https://secwatch.observer/filing/0001193125-26-407555.json","markdown":"https://secwatch.observer/filing/0001193125-26-407555.md","text":"https://secwatch.observer/filing/0001193125-26-407555.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1907108/000119312526407555/0001193125-26-407555-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1907108/000119312526407555/lxeo-20260929.htm"},"model":{"generated_by":"deepseek-v4.1-flash:cloud@v2","generated_at":"2026-10-12T13:50:24.420756+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"}