{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-301190","form_type":"8-K","ticker":"ANNX","cik":"0001528115","company_name":"Annexon, Inc.","filed_at":"2023-12-21T23:59:59+00:00","discovered_at":"2026-05-14T18:03:29.379844+00:00","generated_at":"2026-06-07T09:01:42.514920+00:00","sec_items":["1.01","8.01","9.01"],"event_type":"other_material","sentiment":"negative","materiality_score":0.8,"calibrated_materiality_score":0.8,"confidence":"high","headline":"Annexon prices $125M underwritten offering of common stock and pre-funded warrants","bullets":["Gross proceeds expected ~$125M from 25,035,000 shares at $2.880 and 18,379,861 pre-funded warrants at $2.879.","Closing expected December 26, 2023; Jefferies and TD Cowen act as joint book-running managers.","Pre-funded warrants exercisable immediately; holder limited to 9.99% beneficial ownership unless increased.","Offering dilutes existing shareholders; shares and warrants represent ~43M shares if fully exercised."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-301190","json":"https://secwatch.observer/filing/0001193125-23-301190.json","markdown":"https://secwatch.observer/filing/0001193125-23-301190.md","text":"https://secwatch.observer/filing/0001193125-23-301190.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1528115/000119312523301190/0001193125-23-301190-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1528115/000119312523301190/d456025d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T09:01:42.514920+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":[{"claim_id":"cf23c525379cc5df43f92f165839e021f777b422","claim":"Annexon, Inc. entered into Underwriting Agreement with Jefferies LLC and Cowen and Company, LLC valued at approximately $125.0 million (effective 2023-12-20).","evidence_excerpt":"On December 20, 2023, Annexon, Inc. (the “C ompan y’) entered into an underwriting agreement (“ Underwriting Agreement ”) with Jefferies LLC and Cowen and Company, LLC (the “ Underwriters ”), to issue and sell 25,035,000 shares (the “ Shares ”) of the Company’s common stock, par value $0.001 per share (the “ Common Stock ”) at a price of $2.880 per share","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1528115/000119312523301190/0001193125-23-301190-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"underwriting"},{"label":"Counterparty","value":"Jefferies LLC and Cowen and Company, LLC"},{"label":"Value","value":"approximately $125.0 million"},{"label":"Effective","value":"2023-12-20"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}