---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-061311"
form_type: "8-K"
ticker: "ENZN"
cik: "0000727510"
company_name: "Viskase Holdings, Inc."
filed_at: "2025-06-23T23:59:59+00:00"
generated_at: "2026-05-19T00:30:47.554904+00:00"
event_type: "m_and_a"
sentiment: "negative"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Enzon and Viskase sign merger; Enzon shareholders to own ~2% of combined co

## Summary
- Enzon to acquire Viskase in all-stock reverse merger; combined company will be named "Viskase Holdings, Inc." and trade on OTCQX.
- Enzon common stockholders expected to own ~2.06%; Series C Preferred holders ~13.84%; Viskase stockholders ~84.1%.
- Timothy P. Feast, current Viskase CEO, will be CEO of combined company; board selected by Viskase.
- Closing subject to stockholder approvals, antitrust clearance, etc.; termination fee of $1.0M each.
- Icahn Enterprises Holdings L.P. and affiliates entered support agreement to vote for merger and exchange Series C Preferred at discount.

## SEC filing metadata
- accession: 0001104659-25-061311
- form_type: 8-K
- ticker: ENZN
- cik: 0000727510
- company_name: Viskase Holdings, Inc.
- filed_at: 2025-06-23T23:59:59+00:00
- event_type: m_and_a
- sentiment: negative
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 1.01, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/727510/000110465925061311/0001104659-25-061311-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/727510/000110465925061311/tm2518511d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-061311
- JSON: https://secwatch.observer/filing/0001104659-25-061311.json
- Plain text: https://secwatch.observer/filing/0001104659-25-061311.txt

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