---
schema_version: "secwatch.filing_event.v1"
accession: "0001321732-21-000094"
form_type: "8-K"
ticker: "PEN"
cik: "0001321732"
company_name: "Penumbra Inc"
filed_at: "2021-10-07T23:59:59+00:00"
generated_at: "2026-06-28T22:09:32.405327+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Penumbra completes acquisition of Sixense Enterprises for ~$300M in stock and options

## Summary
- Merger closed Oct 1, 2021; Sixense becomes wholly owned subsidiary of Penumbra.
- Consideration: 661,877 Penumbra shares valued at $185.9M (VWAP $280.88) plus cash for fractional shares.
- Options to purchase Sixense stock exchanged for options to buy 447,017 Penumbra shares valued at $114.1M.
- Penumbra and Sixense previously partners in MVI Health Inc., a VR healthcare joint venture formed in 2017.
- Penumbra purchased additional 40% of MVI from Sixense in Aug 2018 for $20M plus potential $4.5M anti-dilution payments.

## SEC filing metadata
- accession: 0001321732-21-000094
- form_type: 8-K
- ticker: PEN
- cik: 0001321732
- company_name: Penumbra Inc
- filed_at: 2021-10-07T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 2.01, 3.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1321732/000132173221000094/0001321732-21-000094-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1321732/000132173221000094/pen-20211001.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001321732-21-000094
- JSON: https://secwatch.observer/filing/0001321732-21-000094.json
- Plain text: https://secwatch.observer/filing/0001321732-21-000094.txt

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