---
schema_version: "secwatch.filing_event.v1"
accession: "0001321732-21-000082"
form_type: "8-K"
ticker: "PEN"
cik: "0001321732"
company_name: "Penumbra Inc"
filed_at: "2021-09-22T23:59:59+00:00"
generated_at: "2026-06-29T02:00:49.941341+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Penumbra enters M&A with Sixense; issues ~600K shares + options worth ~$300M

## Summary
- Issues ~600,000 shares of common stock valued at ~$170 million based on $280.88 VWAP.
- Grants fully vested options for ~520,000 shares valued at ~$130 million to Sixense service providers.
- Merger expected to close on or about October 1, 2021; Sixense to become wholly owned subsidiary.

## SEC filing metadata
- accession: 0001321732-21-000082
- form_type: 8-K
- ticker: PEN
- cik: 0001321732
- company_name: Penumbra Inc
- filed_at: 2021-09-22T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 3.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1321732/000132173221000082/0001321732-21-000082-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1321732/000132173221000082/pen-20210917.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001321732-21-000082
- JSON: https://secwatch.observer/filing/0001321732-21-000082.json
- Plain text: https://secwatch.observer/filing/0001321732-21-000082.txt

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