{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-302246","form_type":"8-K/A","ticker":"ANNX","cik":"0001528115","company_name":"Annexon, Inc.","filed_at":"2023-12-22T23:59:59+00:00","discovered_at":"2026-05-14T18:03:29.378755+00:00","generated_at":"2026-06-07T07:51:59.198035+00:00","sec_items":["1.01","8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.8,"calibrated_materiality_score":0.8,"confidence":"high","headline":"Annexon raises ~$125M via public offering of 25M shares and 18.4M pre-funded warrants at $2.88","bullets":["Offering includes 25,035,000 common shares at $2.88/share and 18,379,861 pre-funded warrants at $2.879 each.","Gross proceeds expected to be ~$125M before underwriting discounts and expenses.","Underwriters: Jefferies LLC and Cowen and Company, LLC; closing expected December 26, 2023.","Pre-funded warrants exercisable immediately but subject to 9.99% beneficial ownership limitation (waivable to 19.99%).","Offering conducted under shelf registration statement on Form S-3 (File No. 333-258863)."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-302246","json":"https://secwatch.observer/filing/0001193125-23-302246.json","markdown":"https://secwatch.observer/filing/0001193125-23-302246.md","text":"https://secwatch.observer/filing/0001193125-23-302246.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1528115/000119312523302246/0001193125-23-302246-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1528115/000119312523302246/d719794d8ka.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T07:51:59.198035+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":"b8217436b904fc78a53fb0954bce67c83d59ac6b","claim":"Annexon, Inc. entered into Underwriting Agreement with Jefferies LLC and Cowen and Company, LLC valued at $125,000,000 gross proceeds; 25,035,000 shares of common stock at $2.880 per share and pre-funded wa (effective 2023-12-20).","evidence_excerpt":"On December 20, 2023, Annexon, Inc. (the “ Company ’) 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 and, in lieu of Common Stock, certain investors were issued pre-funded warrants to purchase an aggregate of 18,379,861 shares of Common Stock at a price of $2.879 (the “ Pre-Funded Warrants ”), which represents the per share price for the Shares less the $0.001 per share exercise price for each Pre-Funded Warrant (the “ Offering ”).","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1528115/000119312523302246/0001193125-23-302246-index.htm","confidence":0.95,"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":"$125,000,000 gross proceeds; 25,035,000 shares of common stock at $2.880 per share and pre-funded wa"},{"label":"Effective","value":"2023-12-20"}],"fact_type":"material_agreement"},{"claim_id":"f2b68486366ddcee599bf6a79d939b8e8b9d3d90","claim":"Annexon, Inc. entered into Form of Pre-Funded Warrant with Certain investors valued at Pre-funded warrants to purchase up to 18,379,861 shares of common stock at $0.001 exercise price per (effective 2023-12-20).","evidence_excerpt":"in lieu of Common Stock, certain investors were issued pre-funded warrants to purchase an aggregate of 18,379,861 shares of Common Stock at a price of $2.879 (the “ Pre-Funded Warrants ”), which represents the per share price for the Shares less the $0.001 per share exercise price for each Pre-Funded Warrant","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1528115/000119312523302246/0001193125-23-302246-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"equity purchase"},{"label":"Counterparty","value":"Certain investors"},{"label":"Value","value":"Pre-funded warrants to purchase up to 18,379,861 shares of common stock at $0.001 exercise price per"},{"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"}