{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-039475","form_type":"8-K","ticker":"MBX","cik":"0001776111","company_name":"MBX Biosciences, Inc.","filed_at":"2026-02-05T23:59:59+00:00","discovered_at":"2026-05-14T18:02:36.139084+00:00","generated_at":"2026-05-16T04:30:50.763485+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"MBX Biosciences raises ~$87.1M in ATM offering; 2.25M shares sold at $38.76 VWAP","bullets":["Closed sale of 2,250,986 shares at a volume-weighted average price of $38.76 for gross proceeds of approximately $87.1 million on February 4, 2026.","Shares sold under Open Market Sale Agreement with Jefferies dated November 6, 2025, and shelf registration statement effective December 8, 2025.","Net proceeds to fund clinical-stage programs, discovery R&D, working capital, and potential in-licensing or acquisitions.","Following this sale, up to $62.9 million in additional common stock remains available for future ATM sales through Jefferies.","Company retains flexibility to use proceeds for general corporate purposes and complementary business investments."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-039475","json":"https://secwatch.observer/filing/0001193125-26-039475.json","markdown":"https://secwatch.observer/filing/0001193125-26-039475.md","text":"https://secwatch.observer/filing/0001193125-26-039475.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1776111/000119312526039475/0001193125-26-039475-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1776111/000119312526039475/mbx-20260204.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T04:30:50.763485+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"}