---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-283191"
form_type: "8-K"
ticker: "ANNX"
cik: "0001528115"
company_name: "Annexon, Inc."
filed_at: "2025-11-14T23:59:59+00:00"
generated_at: "2026-05-16T19:50:44.843538+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Annexon closes $86.25M public offering of common stock and pre-funded warrants

## Summary
- Priced 25,096,153 shares at $2.60/share and 3,750,000 pre-funded warrants at $2.599 each.
- Underwriters' option for 4,326,922 additional shares exercised in full; total gross $86.25M.
- Net proceeds of approximately $80.4M after underwriting discounts and expenses.
- Offering closed on November 14, 2025; pre-funded warrants exercisable at $0.001 per share.
- Goldman Sachs, TD Cowen, and Wells Fargo acted as joint book-running managers.

## SEC filing metadata
- accession: 0001193125-25-283191
- form_type: 8-K
- ticker: ANNX
- cik: 0001528115
- company_name: Annexon, Inc.
- filed_at: 2025-11-14T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1528115/000119312525283191/0001193125-25-283191-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1528115/000119312525283191/d874883d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-283191
- JSON: https://secwatch.observer/filing/0001193125-25-283191.json
- Plain text: https://secwatch.observer/filing/0001193125-25-283191.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.