---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-21-151231"
form_type: "8-K"
ticker: "ALT"
cik: "0001326190"
company_name: "Altimmune, Inc."
filed_at: "2021-12-17T23:59:59+00:00"
generated_at: "2026-06-28T00:02:30.478048+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Altimmune terminates Lonza manufacturing agreement for AdCOVID program

## Summary
- Terminated Master Services Agreement with Lonza Houston Inc. dated November 5, 2020.
- Associated SOW provided for dedicated manufacturing suite for AdCOVID clinical/commercial supply.
- Termination effective December 17, 2021, following prior discontinuation of AdCOVID program (June 29, 2021).

## SEC filing metadata
- accession: 0001104659-21-151231
- form_type: 8-K
- ticker: ALT
- cik: 0001326190
- company_name: Altimmune, Inc.
- filed_at: 2021-12-17T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 1.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1326190/000110465921151231/0001104659-21-151231-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1326190/000110465921151231/tm2135808d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-21-151231
- JSON: https://secwatch.observer/filing/0001104659-21-151231.json
- Plain text: https://secwatch.observer/filing/0001104659-21-151231.txt

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