---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-211863"
form_type: "8-K"
ticker: "ANNX"
cik: "0001528115"
company_name: "Annexon, Inc."
filed_at: "2026-05-07T23:59:59+00:00"
generated_at: "2026-05-14T21:39:31.472831+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Annexon Q1 net loss $44.1M ($0.23/sh); cash $225M; GA Ph3 data Q4 2026

## Summary
- Net loss $44.1M (-$0.23/sh) vs $54.4M (-$0.37/sh) Q1 2025; R&D $35.8M, G&A $10.3M.
- Cash $225M as of March 31, 2026; expected runway into H2 2027.
- Topline Phase 3 ARCHER II data for vonaprument in GA expected Q4 2026.
- Tanruprubart MAA under EMA review; BLA submission with FORWARD data planned 2026.
- ANX1502 proof-of-concept data in CAD anticipated in 2026.

## SEC filing metadata
- accession: 0001193125-26-211863
- form_type: 8-K
- ticker: ANNX
- cik: 0001528115
- company_name: Annexon, Inc.
- filed_at: 2026-05-07T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1528115/000119312526211863/0001193125-26-211863-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1528115/000119312526211863/annx-20260507.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-211863
- JSON: https://secwatch.observer/filing/0001193125-26-211863.json
- Plain text: https://secwatch.observer/filing/0001193125-26-211863.txt

## Source-grounded claims
- claim_id: 99ebe1c8b7681b60347ab8c897b81b997d70ce45
  claim: Annexon, Inc. reported first quarter ended March 31, 2026 results: net income $44.1 million or $0.23 per share, EPS $0.23 per share.
  evidence_excerpt: March 31, 2025. The change in G&A expenses reflects ongoing corporate consulting and professional services costs. • Net loss: Net loss attributable to common stockholders was $44.1 million or $0.23 per share for the quarter ended March 31, 2026, compared to $54
  evidence_url: https://www.sec.gov/Archives/edgar/data/1528115/000119312526211863/0001193125-26-211863-index.htm

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