---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-018810"
form_type: "8-K"
ticker: "ANNX"
cik: "0001528115"
company_name: "Annexon, Inc."
filed_at: "2023-05-08T23:59:59+00:00"
generated_at: "2026-06-15T13:05:52.800924+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Annexon reports Q1 net loss $38.7M; pipeline milestones expected through 2024

## Summary
- Net loss $38.7M ($0.52/sh) vs $35.4M ($0.92/sh) in Q1 2022; R&D spend rose to $32.3M.
- Cash and investments $228.2M; runway into 2025 for ongoing trials.
- Phase 2 ARCHER trial of ANX007 in geographic atrophy data expected mid-2023.
- Phase 3 GBS trial enrollment completion 2H'23; topline results 1H'24.
- Initial Phase 1b data for ANX009 in lupus nephritis due 1H'23; ANX1502 oral data 2H'23.

## SEC filing metadata
- accession: 0000950170-23-018810
- form_type: 8-K
- ticker: ANNX
- cik: 0001528115
- company_name: Annexon, Inc.
- filed_at: 2023-05-08T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1528115/000095017023018810/0000950170-23-018810-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1528115/000095017023018810/annx-20230508.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-018810
- JSON: https://secwatch.observer/filing/0000950170-23-018810.json
- Plain text: https://secwatch.observer/filing/0000950170-23-018810.txt

## Key facts
- Earnings Releases
  Annexon, Inc. reported the first quarter ended March 31, 2023 results: net income Net loss was $38.7 million or $0.52 per share.
  - Period: the first quarter ended March 31, 2023
  - Net income: Net loss was $38.7 million or $0.52 per share
  - Result: reported results
  source text: On May 8, 2023, Annexon, Inc. (the “Company”) announced certain financial results for the first quarter ended March 31, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1528115/000095017023018810/0000950170-23-018810-index.htm

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