---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-236933"
form_type: "8-K"
ticker: "CNTA"
cik: "0001847903"
company_name: "Centessa Pharmaceuticals plc"
filed_at: "2026-05-22T20:15:48+00:00"
generated_at: "2026-05-22T21:07:49.925492+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# HSR waiting period expires for Lilly's acquisition of Centessa; condition satisfied

## Summary
- Hart-Scott-Rodino waiting period expired at 11:59 p.m. on May 21, 2026, clearing antitrust review.
- Acquisition of Centessa by Eli Lilly announced March 31, 2026; remains subject to shareholder vote and court sanction.
- Proxy statement filed May 7, 2026; shareholders urged to vote on the scheme of arrangement.
- Closing requires approval by Centessa shareholders and sanction by High Court of Justice of England and Wales.

## SEC filing metadata
- accession: 0001193125-26-236933
- form_type: 8-K
- ticker: CNTA
- cik: 0001847903
- company_name: Centessa Pharmaceuticals plc
- filed_at: 2026-05-22T20:15:48+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.7
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1847903/000119312526236933/0001193125-26-236933-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1847903/000119312526236933/d156443d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-236933
- JSON: https://secwatch.observer/filing/0001193125-26-236933.json
- Plain text: https://secwatch.observer/filing/0001193125-26-236933.txt

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