---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-055632"
form_type: "8-K"
ticker: "ENZN"
cik: "0000727510"
company_name: "Viskase Holdings, Inc."
filed_at: "2026-05-05T23:59:59+00:00"
generated_at: "2026-05-14T23:38:12.908015+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Viskase Holdings adopts Section 382 Rights Plan to protect NOL assets; threshold at 4.9%

## Summary
- Declared dividend of one right per common share; record date May 15, 2026; exercise price $30 per right.
- Rights become exercisable if a person acquires 4.9% or more of outstanding common stock.
- Upon triggering, other holders can acquire shares at a 50% discount or receive one share per right.
- Plan expires May 4, 2029, unless earlier redeemed or terminated by the Board.
- Carl Icahn and related entities exempt from the 4.9% threshold; can maintain but not increase ownership.

## SEC filing metadata
- accession: 0001104659-26-055632
- form_type: 8-K
- ticker: ENZN
- cik: 0000727510
- company_name: Viskase Holdings, Inc.
- filed_at: 2026-05-05T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 3.03, 5.03, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/727510/000110465926055632/0001104659-26-055632-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/727510/000110465926055632/tm2613382d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-055632
- JSON: https://secwatch.observer/filing/0001104659-26-055632.json
- Plain text: https://secwatch.observer/filing/0001104659-26-055632.txt

## Source-grounded claims
- claim_id: 5ab1a6757727808120b723b7936f4a3ebd36a681
  claim: Viskase Holdings, Inc.: Board approved and filed Certificate of Designation of Series A-2 Junior Participating Preferred Stock in connection with Section 382 Rights Agreement (effective 2026-05-05).
  evidence_excerpt: In connection with the adoption of the Section 382 Rights Agreement, the Board approved a Certificate of Designation of Series A-2 Junior Participating Preferred Stock of Viskase Holdings, Inc. (the “Certificate of Designation”). The Certificate of Designation was filed with the Secretary of the State of Delaware on May 5, 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/727510/000110465926055632/0001104659-26-055632-index.htm
- claim_id: b097e555341216d5fb330528a8e063d5f7b9fcd2
  claim: Viskase Holdings, Inc. entered into Section 382 Rights Agreement with Continental Stock Transfer & Trust Company (effective 2026-05-05).
  evidence_excerpt: On April 30, 2026 (the “Rights Dividend Declaration Date”), the Board of Directors (the “Board”) of Viskase Holdings, Inc. (formerly known as Enzon Pharmaceuticals, Inc.) (the “Company”) adopted a Section 382 Rights Agreement (the “Section 382 Rights Agreement”)
  evidence_url: https://www.sec.gov/Archives/edgar/data/727510/000110465926055632/0001104659-26-055632-index.htm

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