---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-008322"
form_type: "8-K"
ticker: "ENZN"
cik: "0000727510"
company_name: "Viskase Holdings, Inc."
filed_at: "2026-01-30T23:59:59+00:00"
generated_at: "2026-05-16T06:11:14.812755+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Enzon extends stockholder rights plan expiration to March 2, 2026

## Summary
- Seventh Amendment to Section 382 Rights Agreement executed January 30, 2026.
- Final Expiration Date of rights extended from Jan 31, 2026 to noon NYC time on March 2, 2026.
- Rights agreement otherwise unmodified; purpose is to protect net operating loss tax attributes.
- Continental Stock Transfer & Trust continues as rights agent.

## SEC filing metadata
- accession: 0001104659-26-008322
- form_type: 8-K
- ticker: ENZN
- cik: 0000727510
- company_name: Viskase Holdings, Inc.
- filed_at: 2026-01-30T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 1.01, 3.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/727510/000110465926008322/0001104659-26-008322-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/727510/000110465926008322/tm2521156d11_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-008322
- JSON: https://secwatch.observer/filing/0001104659-26-008322.json
- Plain text: https://secwatch.observer/filing/0001104659-26-008322.txt

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