---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-279776"
form_type: "8-K"
ticker: "CPRX"
cik: "0001369568"
company_name: "CATALYST PHARMACEUTICALS, INC."
filed_at: "2026-06-23T21:15:09+00:00"
generated_at: "2026-06-23T21:16:33.138498+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# FTC grants early termination of HSR waiting period for Catalyst-Angelini merger

## Summary
- FTC early termination of HSR Act waiting period granted June 16; Catalyst aware June 22.
- Closing still requires majority shareholder approval and other customary conditions.
- Parties expect deal to close in Q3 2026.
- Catalyst shareholders to vote on merger as detailed in definitive proxy statement filed June 8.

## SEC filing metadata
- accession: 0001193125-26-279776
- form_type: 8-K
- ticker: CPRX
- cik: 0001369568
- company_name: CATALYST PHARMACEUTICALS, INC.
- filed_at: 2026-06-23T21:15:09+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1369568/000119312526279776/0001193125-26-279776-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1369568/000119312526279776/d166178d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-279776
- JSON: https://secwatch.observer/filing/0001193125-26-279776.json
- Plain text: https://secwatch.observer/filing/0001193125-26-279776.txt

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