---
schema_version: "secwatch.filing_event.v1"
accession: "0000950103-26-000523"
form_type: "8-K"
ticker: "PEN"
cik: "0001321732"
company_name: "Penumbra Inc"
filed_at: "2026-01-15T23:59:59+00:00"
generated_at: "2026-05-16T10:05:21.746929+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 1.0
calibrated_materiality_score: 1.0
confidence: "high"
source: SEC EDGAR
---

# Boston Scientific to acquire Penumbra: $374 cash or 3.8721 BSX shares per share; 73% cash/27% stock

## Summary
- Penumbra holders elect $374 cash or 3.8721 BSX shares per share; proration targets 73.26% cash/26.74% stock.
- Termination: Penumbra pays $525M if it accepts superior offer; Boston Sci pays $900M if antitrust fails.
- Closing subject to Penumbra stockholder vote, HSR and foreign antitrust clearance, S-4 effectiveness, NYSE listing.
- Preliminary Q4/FY2025 results released; audited financials pending, specific figures not in filing.

## SEC filing metadata
- accession: 0000950103-26-000523
- form_type: 8-K
- ticker: PEN
- cik: 0001321732
- company_name: Penumbra Inc
- filed_at: 2026-01-15T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 1.0
- calibrated_materiality_score: 1.0
- confidence: high
- sec_items: 1.01, 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1321732/000095010326000523/0000950103-26-000523-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1321732/000095010326000523/dp240008_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950103-26-000523
- JSON: https://secwatch.observer/filing/0000950103-26-000523.json
- Plain text: https://secwatch.observer/filing/0000950103-26-000523.txt

## Key facts
- Material Agreements
  Penumbra Inc entered into Agreement and Plan of Merger with Boston Scientific Corporation (effective 2026-01-14).
  - Action: entry
  - Agreement: merger
  - Counterparty: Boston Scientific Corporation
  - Effective: 2026-01-14
  source text: On January 14, 2026, Penumbra, Inc., a Delaware corporation (the “Company”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) among the Company, Boston Scientific Corporation, a Delaware corporation (“Parent”), and Pinehurst Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (“Merger Sub”), pursuant to which Merger Sub will merge with and into the Company (the “Merger”), with the Company surviving as a wholly owned subsidiary of Parent.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1321732/000095010326000523/0000950103-26-000523-index.htm

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