---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-147005"
form_type: "8-K"
ticker: "ANNX"
cik: "0001528115"
company_name: "Annexon, Inc."
filed_at: "2025-06-25T23:59:59+00:00"
generated_at: "2026-05-18T19:18:41.465943+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Annexon extends 2022 common warrants to June 2026, cash exercise only at $5.806875

## Summary
- Warrants exercisable for up to 6,877,622 shares of common stock.
- Term extended by one year to June 30, 2026; cash exercise only at $5.806875/share.
- Potential aggregate proceeds of up to $39.9 million if all warrants exercised.
- Amendment entered with certain holders of the 2022 common stock purchase warrants.

## SEC filing metadata
- accession: 0001193125-25-147005
- form_type: 8-K
- ticker: ANNX
- cik: 0001528115
- company_name: Annexon, Inc.
- filed_at: 2025-06-25T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 3.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1528115/000119312525147005/0001193125-25-147005-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1528115/000119312525147005/d949875d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-147005
- JSON: https://secwatch.observer/filing/0001193125-25-147005.json
- Plain text: https://secwatch.observer/filing/0001193125-25-147005.txt

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