---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-149499"
form_type: "8-K"
ticker: "VCNX"
cik: "0001205922"
company_name: "VACCINEX, INC."
filed_at: "2023-05-19T23:59:59+00:00"
generated_at: "2026-06-14T19:29:18.857181+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Vaccinex files prospectus supplement for up to $4.39M ATM offering via Jefferies

## Summary
- May offer and sell up to $4,391,000 of common stock from time to time.
- Sales agent Jefferies LLC under existing Open Market Sale Agreement dated March 27, 2020.
- Proceeds used for general corporate purposes and clinical development.
- Hogan Lovells opinion on validity of shares attached as exhibit.

## SEC filing metadata
- accession: 0001193125-23-149499
- form_type: 8-K
- ticker: VCNX
- cik: 0001205922
- company_name: VACCINEX, INC.
- filed_at: 2023-05-19T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1205922/000119312523149499/0001193125-23-149499-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1205922/000119312523149499/d465594d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-149499
- JSON: https://secwatch.observer/filing/0001193125-23-149499.json
- Plain text: https://secwatch.observer/filing/0001193125-23-149499.txt

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