---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-144089"
form_type: "8-K"
ticker: "PFE"
cik: "0000078003"
company_name: "PFIZER INC"
filed_at: "2023-05-15T23:59:59+00:00"
generated_at: "2026-06-15T01:51:25.777407+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Pfizer and Seagen file HSR notification forms for merger

## Summary
- May 12, 2023: Pfizer and Seagen filed HSR Act notification forms with DOJ and FTC.
- Closing subject to HSR waiting period expiration or termination.
- If referred to EC under Article 4(5), EC approval becomes closing condition.
- Merger announced March 12, 2023, with definitive agreement in place.

## SEC filing metadata
- accession: 0001193125-23-144089
- form_type: 8-K
- ticker: PFE
- cik: 0000078003
- company_name: PFIZER INC
- filed_at: 2023-05-15T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/78003/000119312523144089/0001193125-23-144089-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/78003/000119312523144089/d474141d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-144089
- JSON: https://secwatch.observer/filing/0001193125-23-144089.json
- Plain text: https://secwatch.observer/filing/0001193125-23-144089.txt

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