---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-26-032600"
form_type: "8-K"
ticker: "ETON"
cik: "0001710340"
company_name: "Eton Pharmaceuticals, Inc."
filed_at: "2026-10-14T11:15:22+00:00"
generated_at: "2026-10-14T11:20:05.430210+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Eton licenses LIBERVANT buccal film from Aquestive for $10M upfront, up to $47.5M milestones

## Summary
- Eton paid Aquestive a $10.0M upfront license fee for exclusive U.S. rights to LIBERVANT (diazepam) buccal film for seizure clusters in epilepsy.
- Milestones: $10.0M on first U.S. commercial sale (cut to $5.0M without full ages 2-5 approval), $2.5M on FDA approval for ages 6-11, up to $35M tied to annual net sales.
- Eton pays mid-teens percentage royalties on U.S. net sales; Aquestive is exclusive manufacturer under a 20-year Supply Agreement.
- Commercial launch anticipated April 2027 subject to final FDA approval; tentative approval covers ages 2-5 and 12+, with full 12+ approval expected after VALTOCO exclusivity ends Jan 10, 2027.
- Cited U.S. seizure rescue market exceeds $450M annually; in a 101-patient survey, 71% preferred film vs 13% nasal spray; LIBERVANT holds Orphan Drug Designation (Nov 2016) and patents to 2038.

## SEC filing metadata
- accession: 0001437749-26-032600
- form_type: 8-K
- ticker: ETON
- cik: 0001710340
- company_name: Eton Pharmaceuticals, Inc.
- filed_at: 2026-10-14T11:15:22+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 2.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1710340/000143774926032600/0001437749-26-032600-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1710340/000143774926032600/eton20261013_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-26-032600
- JSON: https://secwatch.observer/filing/0001437749-26-032600.json
- Plain text: https://secwatch.observer/filing/0001437749-26-032600.txt

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