---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-034187"
form_type: "8-K"
ticker: "ENZN"
cik: "0000727510"
company_name: "Viskase Holdings, Inc."
filed_at: "2026-03-25T23:59:59+00:00"
generated_at: "2026-05-15T09:08:25.199026+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "low"
source: SEC EDGAR
---

# Enzon completes exchange offer for Series C Preferred Stock; no terms in filing

## Summary
- Exchange offer for Series C Non-Convertible Redeemable Preferred Stock completed on March 25, 2026.
- Press release announcing completion was issued but not included in this filing.
- Specific exchange ratios, shares tendered, or financial impact not provided in filing.

## SEC filing metadata
- accession: 0001104659-26-034187
- form_type: 8-K
- ticker: ENZN
- cik: 0000727510
- company_name: Viskase Holdings, Inc.
- filed_at: 2026-03-25T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: low
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/727510/000110465926034187/0001104659-26-034187-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/727510/000110465926034187/tm269722d2_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-034187
- JSON: https://secwatch.observer/filing/0001104659-26-034187.json
- Plain text: https://secwatch.observer/filing/0001104659-26-034187.txt

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